Caterpillarwheel tractor-scraperwheel tractor
Caterpillar 637
Maintenance schedule, common problems & OEM parts breakdown
The original Caterpillar 637 is a twin-engine wheel tractor-scraper Caterpillar introduced in 1970, built around a tractor unit derived from the 631C chassis paired with a newly developed scraper unit. Each half of the machine carries its own engine: a Caterpillar D343 diesel drives the tractor, and a Caterpillar D333 diesel is mounted on the scraper unit to drive the rear wheels, with the two engines working in tandem for a combined gross output on the order of 640 flywheel horsepower. This put the 637 in the heavy open-bowl scraper class of its day, offered as a standard open-bowl unit and in push-pull configuration so two machines could load each other without a separate pusher tractor. It was the first machine to carry the 637 name, running through the 1970s before Caterpillar replaced it with the 637D in 1979, and later the 637E, 637E Series II, 637G, and the current 637K.
This early 637 matters to today's parts and collector market precisely because it is not the machine Caterpillar sells today under the same name. Caterpillar reused the bare 637 designation decades later for a modern C18/C9.3-powered dual-engine scraper, so anyone sourcing parts, literature, or advice needs to keep the two machines separate. Surviving twin D343/D333 examples are scarce, having been built for less than a decade before the model line moved on, and many were scrapped or cannibalized once support shifted to later generations. The D343 and D333 are predecessors of Caterpillar's later 3306 and 3304 family and were also used across other period Cat iron, including 631 scrapers, early 769 trucks, 988 loaders, 824B dozers, and 983 track loaders, so some internal engine parts cross over from that wider pool even where 637-specific literature runs thin. The mechanical fuel systems and cable/linkage-actuated hydraulics on this generation also draw genuine restoration interest from collectors who want a pre-electronic machine that a farm or ranch shop can still work on.
Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.
Caterpillar 637 specifications
Engine
| Tractor engine | Cat D343 diesel, 6-cylinder, four-stroke |
| Scraper engine | Cat D333 diesel, 6-cylinder, four-stroke |
| D343 displacement | 14.6 L (891 cu in); 137 mm x 165 mm bore x stroke (5.4 in x 6.5 in) |
| D333 displacement | Bore/stroke varies by production series: 114 mm x 140 mm (4.5 in x 5.5 in) on early series, 121 mm x 152 mm (4.75 in x 6.0 in) on later series |
| D333 rated output class | Approx. 186 kW (250 hp) class; exact rating varies by production series and application, verify against the data plate |
| Combined gross flywheel output | Approx. 477 kW (640 hp) combined for tractor and scraper engines together — figure is approximate and not cross-verified across independent OEM documents; treat as a general reference, not a guaranteed rating |
Weights
| Operating weight | Not documented for this exact vintage configuration. Published 637 operating-weight figures found in circulation belong to the later 637B/C/D/E/G revisions, which carry different engines (single 3408 or C-series power units) and do not apply to this D343/D333 twin-engine Series I machine. Verify against the data plate or the original specalog for this serial range. |
| Shipping weight | Not documented for this exact vintage configuration — same caveat as operating weight. |
| Ground pressure | Not published for this configuration in available sources. |
Dimensions
| Transport length/width/height | Not documented for this exact vintage configuration. Dimensional figures found in circulation for the 637 line belong to later lettered revisions (637B and newer) with different engines and are not reliable for this Series I D343/D333 machine. |
| Wheelbase / track gauge | Not published for this configuration in available sources. |
| Ground clearance | Not published for this configuration in available sources. |
Performance
| Travel speeds | Not documented for this exact vintage configuration in available sources. |
| Drawbar / gradeability | Not published for this configuration in available sources. |
| Configuration note | The 637 line was offered in both standard tractor-drawn and push-pull tandem configurations; this catalog's non-cushion hitch and steering arrangement points to the standard (non push-pull) hitch setup for this unit. |
Service capacities (summary)
| Fuel tank | Not documented for this exact vintage configuration in available sources. |
| Hydraulic system | Not documented for this exact vintage configuration in available sources. |
| Engine oil | Not documented for this exact vintage configuration in available sources. |
| Cooling system | Not documented for this exact vintage configuration in available sources. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
637 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Tractor engine (D343) crankcase, with filter | 38 L (10.0 US gal) | Caterpillar DEO-class heavy-duty diesel engine oil, conventional (non-synthetic) formulation. SAE 30 for temperate operation; SAE 10W for below-freezing starts. Check level with engine stopped, machine on level ground. |
| Scraper engine (D333) crankcase, with filter | 26-30 L (7.0-8.0 US gal), varies by series/pan configuration | Same Cat DEO-class conventional diesel engine oil as the tractor engine. SAE 30 typical; SAE 10W or 10W-30 in cold climates. Fill to dipstick mark, not to the stated capacity figure. |
| Tractor engine (D343) cooling system | 66-68 L (17.5 US gal) | Full-strength ethylene-glycol permanent-type antifreeze/coolant mixed to local climate (typically 50/50 with water), pre-ELC era. Jacket water heater group on this machine keeps coolant warm for cold starts; do not substitute modern extended-life coolant formulations. |
| Chassis and pin grease points (both units) | Spec only - no fixed refill volume, apply per grease point at scheduled interval | NLGI Grade 2 multipurpose EP chassis grease, lithium or lithium-complex base, general industrial-era Caterpillar-type multipurpose grease. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 637 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the 637 beyond the schedule
Predictive maintenance & fluid analysis
Sample oil from the D343 tractor engine and the D333 scraper engine separately; never average the two, they see different load and idle patterns. Watch D333 samples closely for fuel dilution, a known risk on this engine under scraper duty cycles. Pull hydraulic oil samples from the bowl/apron/ejector circuit for wear metals, since worn pump vanes and cylinder packing show there first. Check coolant condition in both radiators independently, and track wheel-bearing grease condition given this machine's tractor-plus-trailing-scraper axle loads.
Corrective & common repairs
Common failure points on this generation are push-pull hitch pin and bushing wear from repeated tandem hookups, D333 injector and fuel-pump wear that shows up as crankcase fuel dilution, and worn cable or rod linkages in the mechanical bowl/apron/ejector controls. Turbocharged TA-suffix engines are prone to shaft-play and oil-seal leakage at the turbo over time. Age-related wiring, gauge, and sender faults are routine on surviving units and should be checked before assuming a mechanical cause.
Overhaul & rebuild points
Plan top-end work on the D343 and D333 as separate overhauls, not a matched pair, since wear rates differ between the tractor and scraper engines. Transmission, final drive, and differential rebuilds follow standard mechanical-drivetrain wear patterns for this era. Bowl, apron, and ejector wear plates and the cutting edge are consumable and should be inspected at every major service. Because these engines are predecessors to the 3304/3306 family, some internal parts cross over where 637-specific stock has dried up; verify part interchange with a specialist before ordering.
Seasonal & environment servicing
Cold-weather starts on both engines benefit from block heaters or an ether-assist start aid; check both cooling systems for correct antifreeze concentration before winter, not just the tractor engine. In dusty or abrasive cut-and-fill work, service both air cleaners more often than the standard interval calls for. If the machine sits idle for an extended season, drain or stabilize fuel in both tanks and protect the D333's injection pump from corrosion, a common cause of hard starting on stored units.
637 common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 6H-6000 | Film-Warning Left Side Of Filter Opening On Seat Frame | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
637 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| LOW OIL PRESSURE (indicator light + buzzer) | Gauge-cluster warning that oil pressure on either the front (tractor) or rear (scraper) engine has dropped below the safe minimum on that engine's gauge. | Low crankcase oil level, worn oil pump, plugged suction screen or filter, worn main/rod bearings, or a failed pressure sender. | Idle the affected engine down and shut it down at once. Check crankcase level and confirm pressure at the block test port before restarting; do not run on the light or buzzer. |
| HIGH COOLANT TEMPERATURE (gauge in red / warning light) | Coolant temperature gauge for the front or rear engine reads above the normal operating band. | Low coolant level, plugged radiator core, stuck thermostat, failing water pump, or sustained overload on that engine. | Reduce load and let the engine idle to cool; do not remove the cap while hot. Once cool, check coolant level and radiator core condition, and confirm thermostat operation per the engine service manual. |
| FUEL DILUTION OF ENGINE LUBE OIL (D333) | Crankcase oil level rises and the oil thins and smells of diesel, indicating fuel is leaking into the lube system rather than being burned. | Worn or leaking injectors, a failing fuel transfer pump, or worn injection-pump shaft seals letting fuel seep past into the oil pan. | Check oil level and smell at every shift change. If oil is diluted, sample it, then pull and pressure-test the injectors and inspect the transfer pump and injection-pump seals before returning the engine to service. |
| FUEL RACK OUT OF SETTING (D333) | Fuel rack position on the injection pump has drifted from the governor's calibrated setting, producing uneven power between cylinders or an engine that will not reach rated speed. | Worn or maladjusted governor-to-rack linkage, or an incorrect rack setting left after injection pump service. | Recheck and reset the fuel rack against the calibrated setting called out in the engine's fuel-system troubleshooting procedure, then recheck governor linkage travel and injection pump timing. |
| FUEL IN HYDRAULIC TANK (rear engine FIP return line) | The hydraulic tank overfills and pushes oil out its breather, with the excess found to be diesel fuel rather than hydraulic oil. | The rear (scraper) engine's injection-pump constant-bleed fuel return line was routed or reconnected to the hydraulic tank instead of back to the fuel tank. | Trace the rear engine's injection-pump return line back to its correct fuel-tank connection, correct the routing, then drain and inspect the hydraulic system for fuel contamination before returning the machine to work. |
| ENGINE WILL NOT SHUT DOWN AT THROTTLE (D343) | Pulling the throttle to the stop position does not kill the engine; the fuel supply has to be cut manually to stop it. | The fuel-rack shutoff shaft is sticking or worn, or the shutoff solenoid is weak or has failed, so the rack never reaches the shutoff position. | Work the shutoff lever by hand to confirm free travel, then inspect the shutoff shaft and solenoid per the engine service manual. Pulling the fuel line is not a repair, only a stopgap. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
637 attachments & work tools
Push-Pull Mounting Group
Adds a hydraulically actuated bail and cushioned contact plate at the front of the tractor and a mating hook at the rear of the scraper bowl. Two so-equipped units push-load and pull-load each other, giving tandem self-loading without a separate pusher tractor.
Non-Cushion Hitch and Steering Arrangement
Base hitch and steering linkage joining tractor to scraper without the shock-damping accumulator used on the cushioned hitch. Caterpillar had introduced a cushioned hitch as an option on the contemporaneous 631B tractor line in the late 1960s to cut fatigue cracking from haul-road shock, so the non-cushion arrangement on this machine is the simpler, rigid alternative to that upgrade.
Roll-Over Protective Structure, open canopy or enclosed cab
Factory-installable open canopy ROPS or a fully enclosed cab version, fitted to the tractor unit. The 631-series tractor sharing this chassis carried ROPS as catalog equipment in the same period, consistent with ROPS being an installable option rather than a universal standard fitment on this machine.
Retarder Arrangement
Adds engine or transmission retarding capacity beyond the service brakes, for repeated descents with a loaded bowl. Later scrapers in the same product family continued to offer a comparable retarder to extend brake life on grade, indicating the same role carried through the line rather than being unique to one series.
Ether Starting Aid Group
Injects ether into intake air on cranking to improve cold-weather starting. On this twin-engine machine the aid applies to the tractor and scraper power units individually, and the same cold-start function continued as catalog equipment on later scrapers in this family.
Jacket Water Heater Group
Keeps engine coolant warm during shutdown in cold climates, easing starting and cutting warm-up time. Applies to either of the two engines and follows the standard cold-weather accessory pattern used across Caterpillar diesel power units of this era.
Refrigerant Compressor / Air Conditioner Arrangement
Factory air conditioning tied to the enclosed-cab option: a compressor driven off the tractor engine feeds a cab evaporator and condenser. Pairs with the enclosed ROPS cab rather than the open canopy.
Radiator Core Protector Grid Group
Grille-type grid guard mounted ahead of the radiator core to stop thrown rock and debris from puncturing the core during quarry or rock-cut work, matching the underside and front-end guarding packages Caterpillar offered across its earthmoving line in this period.
Crankcase Guard Group
Underside armor plate shielding the tractor engine crankcase and oil pan from ground strikes in rough cut-and-fill or rock work.
Power Train Guard Group
Belly guarding for the tractor drivetrain, covering transmission and final-drive housings, fitted alongside the crankcase guard for severe-application protection.
Coupler system
The push-pull bail-and-hook hitch is the coupling method for tandem self-loading on this machine; no auger-bowl or elevator work-tool coupling applies to this base model, since bowl-elevator and auger/coal-bowl variants belong to a later, unrelated machine sold under the same model number decades afterward.
All 637 assemblies by section
Every catalogued assembly group for the Caterpillar 637. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Attachments
2g365 Air Conditioner Arrangement
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 20 |
| 1P***22 | Air Conditioner Group | 1 |
| 1P***23 | Console Group-Control | 1 |
1p3322 Air Conditioner Group--Part 3 Of 3
| 1P***22 | Air Conditioner Group | 1 |
1p3322 Air Conditioner Group--Part 1 Of 3
| 1P***22 | Air Conditioner Group | 1 |
1p3322 Air Conditioner Group--Part 2 Of 3
| 1P***22 | Air Conditioner Group | 1 |
9d6915 Air Conditioner Wiring Group
| 9D***15 | Air Conditioner Wiring Group | 1 |
8j6064 Bail Cylinder Group--3.50" Bore X 25.00' Stroke
| 8J***64 | Bail Cylinder Group | 1 |
8d9965 Bowl And Apron Control Group--Type 2
| 8D***65 | Bowl And Apron Control Group | 1 |
8d9965 Bowl And Apron Control Group--Type 1
| 8D***65 | Bowl And Apron Control Group | 1 |
9d5610 Cab Door Group
| 9D***10 | Cab Door Group | 1 |
2p3232 Camshaft Cover Group
| 2P***32 | Camshaft Cover Group | 1 |
2g1094 Case And Frame Assembly--Part 1 Of 2
| 2G***94 | Case And Frame Assembly | 1 |
9d4423 Case And Frame Assembly
| 9D***23 | Case And Frame Assembly | 1 |
2g1094 Case And Frame Assembly--Part 2 Of 2
| 2G***94 | Case And Frame Assembly | 1 |
8d8219 Differential Case And Frame Assembly
| 8D***19 | Case And Frame Assembly | 1 |
8d6010 Frame And Case Group--Factory Installation--Type 1
| 8D***10 | Case And Frame Group | 1 |
8d6010 Frame And Case Group--Factory Installation--Type 2
| 8D***10 | Case And Frame Group | 1 |
5j5272 Brake Chamber Assembly
| 5J***72 | Chamber As-Brake | 1 |
7n4297 Clutch And Refrigerant Compressor Group
| 7N***97 | Clutch & Refrig Compressor Group | 1 |
1p2780 Refrigerant Compressor Group--Type 2
| 1P***80 | Compressor Group-Refrigerant | 1 |
1p2780 Refrigerant Compressor Group--Type 1
| 1P***80 | Compressor Group-Refrigerant | 1 |
1p3323 Control Console Group--Type 1
| 1P***23 | Console Group-Control | 1 |
1p3323 Control Console Group--Type 2
| 1P***23 | Console Group-Control | 1 |
7d4970 Control And Lines Group--As Viewed From Right Hand Side Of Machine--Part 2 Of 2--Type 2
| 7D***70 | Control And Lines Group | 1 |
7d4970 Control And Lines Group--As Viewed From Right Hand Side Of Machine--Part 1 Of 2--Type 4
| 7D***70 | Control And Lines Group | 1 |
7d4970 Control And Lines Group--As Viewed From R.H. Side On Machine--Part 2 Of 2--Type 5
| 7D***70 | Control And Lines Group | 1 |
7d4970 Control And Lines Group--As Viewed From Right Hand Side Of Machine--Part 1 Of 2--Type 1
| 7D***70 | Control And Lines Group | 1 |
7d4970 Control And Lines Group--As Viewed From R.H. Side Of Machine--Part 1 Of 2--Type 5
| 7D***70 | Control And Lines Group | 1 |
7d4970 Control And Lines Group--As Viewed From Right Hand Side Of Machine--Part 1 Of 2--Type 3
| 7D***70 | Control And Lines Group | 1 |
7d4970 Control And Lines Group--As Viewed From Right Hand Side Of Machine--Part 1 Of 2--Type 2
| 7D***70 | Control And Lines Group | 1 |
7d4970 Control And Lines Group--As Viewed From Right Hand Side Of Machine--Part 2 Of 2--Type 3
| 7D***70 | Control And Lines Group | 1 |
7d4970 Control And Lines Group--As Viewed From Right Hand Side Of Machine--Part 2 Of 2--Type 1
| 7D***70 | Control And Lines Group | 1 |
7d4970 Control And Lines Group--As Viewed From R.H. Side Of Machine--Part 2 Of 2--Type 4
| 7D***70 | Control And Lines Group | 1 |
2s6096 Protection Cover Group--Radiator Cap
| 2S***96 | Cover Group-Protection; Protection Cover Group-- Radiator Cap | 1 |
8s3747 Protection Cover Group--Oil Filler Cap
| 8S***47 | Cover Group-Protection; Protection Cover Group-- Oil Filler Cap | 1 |
9d630 Dust Cover Group
| 9D***30 | Cover-Dust | 1 |
9d5795 Crankcase Guard Group--Heavy Duty
| 9D***95 | Crankcase Guard Group | 1 |
1p3325 Defroster Duct Group
| 1P***25 | Defroster Duct Group; Defroster Fan Duct Group | 1 |
8d1376 Differential Case And Frame Assembly
| 8D***76 | Differential Case And Frame Assembly | 1 |
8d4889 Differential Case And Frame Assembly
| 8D***89 | Differential Case And Frame Assembly | 1 |
8d1365 Differential Case And Frame Assembly
| 8D***65 | Differential Case And Frame Assembly | 1 |
9f740 Discharger
| 9F***40 | Discharger Group | 1 |
7d6010 Emergency Starting Receptacle Group--
| 7D***10 | Emergency Start Receptacle Group | 1 |
9d370 Emergency Starting Receptacle Group
| 9D***70 | Emergency Starting Receptacle Group | 1 |
7d6530 Ether Starting Aid Group
| 7D***30 | Ether Starting Aid Group | 1 |
9d1075 Ether Starting Aid Group
| 9D***75 | Ether Starting Aid Group | 1 |
3s4763 Fan Assembly--Reversible Blade
| 3S***63 | Fan Assembly | 1 |
5d2856 Defroster Fan Group--24 Volt--Type 1
| 5D***56 | Fan Group-Defrosting | 1 |
5d2856 Defroster Fan Group--24 Volt--Type 2
| 5D***56 | Fan Group-Defrosting | 1 |
7d5730 Fast Fill Fuel Adapter Group
| 7D***30 | Fast Fill Fuel Adapter Group | 1 |
7d8940 Fast Fill Fuel Adapter Group--Type 1
| 7D***40 | Fast Fill Fuel Adapter Group | 1 |
7d8940 Fast Fill Fuel Adapter Group--Type 3
| 7D***40 | Fast Fill Fuel Adapter Group | 1 |
9d3950 Fast Fill Fuel Adapter Group
| 9D***50 | Fast Fill Fuel Adapter Group | 1 |
8d8500 Fast Fill Fuel Adapter Group--Type 1
| 8D***00 | Fast Fill Fuel Adapter Group | 1 |
7d8940 Fast Fill Fuel Adapter Group--Type 2
| 7D***40 | Fast Fill Fuel Adapter Group | 1 |
8d8500 Fast Fill Fuel Adapter Group--Type 2
| 8D***00 | Fast Fill Fuel Adapter Group | 1 |
9d7290 Field Rework Guard Group
| 9D***07 | Rod 35" Long | 3 |
| 9D***08 | Rod 32.36" Long | 1 |
| 9D***90 | Field Rework Guard Group | 1 |
8d1260 Frame And Case Group--Factory Installation--Part 1 Of 2
| 8D***60 | Frame And Case Group | 1 |
8d1260 Frame And Case Group--Factory Installation--Part 2 Of 2
| 8D***60 | Frame And Case Group | 1 |
8d1400 Frame And Case Group--Factory Installation
| 8D***00 | Frame And Case Group | 1 |
8d6120 Frame And Case Group--Factory Installation--Type 1
| 8D***20 | Frame And Case Group | 1 |
8d6120 Frame And Case Group--Factory Installation--Type 2
| 8D***20 | Frame And Case Group | 1 |
7d6000 Fast Fill Fuel Adapter Group
| 7D***00 | Fuel Tank Adapter Group | 1 |
8f9866 Grease Gun
| 8F***66 | Grease Gun As | 1 |
8m9858 Tool Group
| 8M***58 | Hand Tool Group | 1 |
8d2520 Crankcase Guard Group--Heavy Duty
| 8D***20 | Heavy Duty Crankcase Guard Group | 1 |
7d8790 High Speed Oil Change Group--Type 1
| 7D***90 | High Speed Oil Change Group | 1 |
7d8790 High Speed Oil Change Group--Type 2
| 7D***90 | High Speed Oil Change Group | 1 |
8j9138 Hitch Reinforcement Group--Field Installation
| 8J***93 | Reinforcement Right Hand | 1 |
| 8J***94 | Reinforcement Left Hand | 1 |
| 8J***38 | Hitch Reinforcement Group | 1 |
7d5180 Hood Side Door Group
| 7D***80 | Hood Side Door Group | 1 |
8d6870 Hood Side Door Group
| 8D***70 | Hood Side Door Group | 1 |
5j8063 Hydraulic Pump Assembly
| 5J***63 | Hydraulic Pump Assembly | 1 |
2p6133 Jacket Water Heater Group--Type 1
| 2P***33 | Jacket Water Heater Group | 1 |
2p6133 Jacket Water Heater Group--Type 2
| 2P***33 | Jacket Water Heater Group | 1 |
2p2429 Jacket Water Heater Group
| 2P***29 | Jacket Water Heater Group | 1 |
2p6133 Jacket Water Heater Group--Type 3
| 2P***33 | Jacket Water Heater Group | 1 |
1m1882 Flood Lamp Assembly--24 Volt--Type 1
| 1M***82 | Lamp Group | 1 |
1m1882 Flood Lamp Assembly--24 Volt--Type 2
| 1M***82 | Lamp Group | 1 |
7d1180 Light Signal Receiver Group--24 Volt
| 7D***80 | Light Signal Receiver Group | 1 |
9d6880 Air Conditioner Lines Group
| 9D***80 | Lines Group-Air Conditioner | 1 |
6d877 Link Group
| 6D***77 | Link Group | 1 |
9d880 Roll-Over Protective Structure Mounting Group--Field Installation
| 9D***80 | Mounting Group | 1 |
9d6590 Roll-Over Protective Structure Mounting Group--Field Installation
| 9D***90 | Mounting Group | 1 |
8d3470 Mounting Group--Field Installation--Type 2
| 8D***70 | Mounting Group | 1 |
8d3350 Mounting Group--Field Installation--Type 1
| 8D***50 | Mounting Group | 1 |
8d3470 Mounting Group--Field Installation--Type 1
| 8D***70 | Mounting Group | 1 |
8d3350 Mounting Group--Field Installation--Type 2
| 8D***50 | Mounting Group | 1 |
Name Plates And Transfers
| 1P***78 | Film Lubrication Instructions | 1 |
| 1P***76 | Film-Cat On Side Of Operator Compartment | 1 |
| 1S***88 | Film-- Drain Valve; --On Each Side Of Radiator Support | 1 |
7d7040 Non-Cushion Hitch And Steering Arrangement-Factory Installation
| 5J***06 | Steering Cylinder Group | 2 |
| 7D***20 | Steering Pump And Lines Group | 1 |
| 7D***50 | Steering Gear Group | 1 |
7d5490 Non-Cushion Hitch And Steering Arrangement-Factory Installation
| 1P***63 | Plate Lubrication | 1 |
| 5J***06 | Steering Cylinder Group | 2 |
| 7D***20 | Steering Pump And Lines Group | 1 |
7j7484 Hitch And Steering Group--Part 1 Of 2--Type 1
| 7J***84 | Non-Cushion Hitch And Steering Group; Hitch And Steering Group | 1 |
7j7484 Hitch And Steering Group--Part 2 Of 2--Type 2
| 7J***84 | Non-Cushion Hitch And Steering Group; Hitch And Steering Group | 1 |
7j7484 Hitch And Steering Group--Part 1 Of 2--Type 2
| 7J***84 | Non-Cushion Hitch And Steering Group; Hitch And Steering Group | 1 |
7j7484 Hitch And Steering Group--Part 2 Of 2--Type 1
| 7J***84 | Non-Cushion Hitch And Steering Group; Hitch And Steering Group | 1 |
4n4056 Oil Cooler Adapter Group
| 4N***56 | Oil Cooler Adapter Group | 1 |
2p2849 Oil Cooler Adapter Group
| 2P***49 | Oil Cooler Adapter Group | 1 |
4n5525 Oil Cooler Group
| 4N***25 | Oil Cooler Group | 1 |
7d5900 Parking Brake Control Arrangement
| 7D***80 | Parking Brake Control Group | 1 |
| 7D***00 | Parking Brake Control Arrangement | 1 |
| 7J***06 | Key, Square; 35 mm (1.38") Long, Parking Brake Control Group | 1 |
9d440 Parking Brake Control Arrangement
| 7J***06 | Key, Square; 35 mm (1.38") Long, Parking Brake Control Group | 1 |
| 9D***10 | Parking Brake Control Group | 1 |
| 9D***40 | Parking Brake Control Arrangement | 1 |
7d5880 Parking Brake Control Group--As Viewed From Right Hand Side Of Machine--Part 2 Of 2--Type 3
| 7D***80 | Parking Brake Control Group | 1 |
7d5880 Parking Brake Control Group--As Viewed From Right Hand Side Of Machine--Part 1 Of 2--Type 3
| 7D***80 | Parking Brake Control Group | 1 |
7d5880 Parking Brake Control Group--As Viewed From Right Hand Side Of Machine--Part 2 Of 2--Type 4
| 7D***80 | Parking Brake Control Group | 1 |
9d410 Parking Brake Control Group--As Viewed From Right Hand Side Of Machine--Part 1 Of 2--Type 1
| 9D***10 | Parking Brake Control Group | 1 |
7d5880 Parking Brake Control Group--As Viewed From Right Hand Side Of Machine--Part 1 Of 2--Type 4
| 7D***80 | Parking Brake Control Group | 1 |
9d410 Parking Brake Control Group--As Viewed From R.H. Side Of Machine--Part 1 Of 2--Type 2
| 9D***10 | Parking Brake Control Group | 1 |
7j5106 Parking Brake Control Group--Type 2
| 7J***06 | Key, Square; 35 mm (1.38") Long, Parking Brake Control Group | 1 |
7d5880 Parking Brake Control Group--As Viewed From Right Hand Side Of Machine--Part 1 Of 2--Type 2
| 7D***80 | Parking Brake Control Group | 1 |
7j5106 Parking Brake Control Group--Type 1
| 7J***06 | Key, Square; 35 mm (1.38") Long, Parking Brake Control Group | 1 |
7d5880 Parking Brake Control Group--As Viewed From Right Hand Side Of Machine--Part 2 Of 2--Type 1
| 7D***80 | Parking Brake Control Group | 1 |
9d410 Parking Brake Control Group--As Viewed From Right Hand Side Of Machine--Part 2 Of 2--Type 1
| 9D***10 | Parking Brake Control Group | 1 |
7d5880 Parking Brake Control Group--As Viewed From Right Hand Side Of Machine--Part 1 Of 2--Type 1
| 7D***80 | Parking Brake Control Group | 1 |
7d5880 Parking Brake Control Group--As Viewed From Right Hand Side Of Machine--Part 2 Of 2--Type 2
| 7D***80 | Parking Brake Control Group | 1 |
9d410 Parking Brake Control Group--As Viewed From R.H. Side Of Machine--Part 2 Of 2--Type 2
| 9D***10 | Parking Brake Control Group | 1 |
9d300 Power Train Guard Group--Field Installation
| 9D***00 | Power Train Guard Group | 1 |
8d2780 Power Train Guard Group
| 8D***80 | Power Train Guard Group | 1 |
9j5042 Vane Pump Group--Type 1
| 9J***42 | Pump Group-Vane | 1 |
9j5042 Vane Pump Group--Type 2
| 9J***42 | Pump Group-Vane | 1 |
9j5042 Vane Pump Group--Type 3
| 9J***42 | Pump Group-Vane | 1 |
2g1090 Push-Pull Mounting Group
| 2G***90 | Push-Pull Mounting Group | 1 |
7d7010 Push-Pull Pump And Lines Group--Part 1 Of 2--Type 2
| 7D***10 | Push-Pull Pump And Lines Group | 1 |
7d7010 Push-Pull Pump And Lines Group--Part 1 Of 2
| 7D***10 | Push-Pull Pump And Lines Group | 1 |
7d7010 Push-Pull Pump And Lines Group--Part 2 Of 2
| 7D***10 | Push-Pull Pump And Lines Group | 1 |
7d7010 Push-Pull Pump And Lines Group--Part 2 Of 2--Type 2
| 7D***10 | Push-Pull Pump And Lines Group | 1 |
1p441 Radiator Core Protector Grid Group
| 1P***41 | Radiator Core Protector Grid Group | 1 |
2d284 Rear Flood Light Group--24 Volt--Type 2
| 2D***84 | Rear Flood Light Group | 1 |
2d284 Rear Flood Light Group--24 Volt--Type 1
| 2D***84 | Rear Flood Light Group | 1 |
4n4990 Refrigerant Compressor Arrangement
| 2P***95 | Pulley | 1 |
| 2P***97 | Refrigerant Compressor Group | 1 |
| 4N***81 | Guard Assembly | 1 |
2p9599 Refrigerant Compressor Arrangement
| 2P***95 | Pulley | 1 |
| 2P***96 | Guard Assembly | 1 |
| 2P***97 | Refrigerant Compressor Group | 1 |
2p9597 Refrigerant Compressor Group--Type 2
| 2P***97 | Refrigerant Compressor Group | 1 |
2p9597 Refrigerant Compressor Group--Type 1
| 2P***97 | Refrigerant Compressor Group | 1 |
2p9597 Refrigerant Compressor Group--Type 3
| 2P***97 | Refrigerant Compressor Group | 1 |
2p9597 Refrigerant Compressor Group--Type 4--Field Installation
| 2P***97 | Refrigerant Compressor Group | 1 |
7d4980 Retarder Arrangement
| 7D***70 | Control And Lines Group | 1 |
| 7D***80 | Retarder Arrangement | 1 |
| 8S***50 | Retarder Group | 1 |
8d9970 Retarder Arrangement--Factory Installation
| 4N***07 | Retarder Oil Cooler Group | 1 |
| 7D***70 | Control And Lines Group | 1 |
| 8D***70 | Retarder Arrangement | 1 |
9s6889 Retarder Control Group
| 9S***89 | Retarder Control Group | 1 |
8s550 Retarder Group
| 8S***50 | Retarder Group | 1 |
4n4607 Retarder Oil Cooler Group--Type 2
| 4N***07 | Retarder Oil Cooler Group | 1 |
9s8088 Oil Cooler Group--Type 1
| 9S***88 | Retarder Oil Cooler Group | 1 |
4n4607 Retarder Oil Cooler Group
| 4N***07 | Retarder Oil Cooler Group | 1 |
9s8088 Oil Cooler Group--Type 2
| 9S***88 | Retarder Oil Cooler Group | 1 |
1p3324 Return Air Console Group
| 1P***24 | Return Air Console Group | 1 |
Roll-Over Protective Structure (9d5612 N/S)--Enclosed
| 9D***12 | Roll-Over Protective Structure | 1 |
8d9855 Roll-Over Protective Structure Group--Enclosed--Part 2 Of 3--Type 2
| 8D***55 | Roll-Over Protective Structure Group | 1 |
8d8740 Roll-Over Protective Structure Group--Open--Type 2
| 8D***40 | Roll-Over Protective Structure Group | 1 |
8d9855 Roll-Over Protective Structure Group--Enclosed--Part 1 Of 3--Type 1
| 8D***55 | Roll-Over Protective Structure Group | 1 |
8d9855 Roll-Over Protective Structure Group--Enclosed--Part 3 Of 3--Type 3
| 8D***55 | Roll-Over Protective Structure Group | 1 |
8d9855 Roll-Over Protective Structure Group--Enclosed--Part 2 Of 3--Type 3
| 8D***55 | Roll-Over Protective Structure Group | 1 |
8d9855 Roll-Over Protective Structure Group--Enclosed--Part 1 Of 3--Type 3
| 8D***55 | Roll-Over Protective Structure Group | 1 |
8d9855 Roll-Over Protective Structure Group--Enclosed--Part 2 Of 3--Type 4
| 8D***55 | Roll-Over Protective Structure Group | 1 |
8d9855 Roll-Over Protective Structure Group--Enclosed--Part 1 Of 3--Type 2
| 8D***55 | Roll-Over Protective Structure Group | 1 |
8d9855 Roll-Over Protective Structure Group--Enclosed--Part 1 Of 3--Type 4
| 8D***55 | Roll-Over Protective Structure Group | 1 |
8d9855 Roll-Over Protective Structure Group--Enclosed--Part 3 Of 3--Type 1
| 8D***55 | Roll-Over Protective Structure Group | 1 |
8d8740 Roll-Over Protective Structure Group--Open--Type 1
| 8D***40 | Roll-Over Protective Structure Group | 1 |
8d9855 Roll-Over Protective Structure Group--Enclosed--Part 2 Of 3--Type 1
| 8D***55 | Roll-Over Protective Structure Group | 1 |
8d9855 Roll-Over Protective Structure Group--Enclosed--Part 3 Of 3--Type 2
| 8D***55 | Roll-Over Protective Structure Group | 1 |
8d9855 Roll-Over Protective Structure Group--Enclosed--Part 3 Of 3--Type 4
| 8D***55 | Roll-Over Protective Structure Group | 1 |
9d890 Roll-Over Protective Structure Mounting Group--Field Installation
| 9D***90 | Roll-Over Protective Structure Mounting Group | 1 |
9d650 Roll-Over Protective Structure Group--Field Installation
| 9D***50 | Rops Group | 1 |
5d3306 Rotochamber Assembly
| 5D***06 | Rotochamber Assembly | 1 |
6d6806 Rotochamber Assembly
| 6D***06 | Rotochamber Assembly | 1 |
7d5860 Scraper Hitch Lines Group--Part 2 Of 2--Type 2
| 7D***60 | Scraper Hitch Lines Group | 1 |
7d5860 Scraper Hitch Lines Group--Part 1 Of 2--Type 2
| 7D***60 | Scraper Hitch Lines Group | 1 |
7d5860 Scraper Hitch Lines Group--Part 1 Of 2--Type 1
| 7D***60 | Scraper Hitch Lines Group | 1 |
7d5860 Scraper Hitch Lines Group--Part 2 Of 2--Type 1
| 7D***60 | Scraper Hitch Lines Group | 1 |
7d5430 Scraper Pump And Lines Group--Part 2 Of 2-Type 2
| 7D***30 | Scraper Pump And Lines Group | 1 |
7d7060 Scraper Pump And Lines Group--Part 2 Of 2
| 7D***60 | Scraper Pump And Lines Group | 1 |
7d7060 Scraper Pump And Lines Group--Part 1 Of 2--Type 1
| 7D***60 | Scraper Pump And Lines Group | 1 |
7d7060 Scraper Pump And Lines Group--Part 1 Of 2--Type 2
| 7D***60 | Scraper Pump And Lines Group | 1 |
7d7060 Scraper Pump And Lines Group--Part 2 Of 2--Type 1
| 7D***60 | Scraper Pump And Lines Group | 1 |
7d5430 Scraper Pump And Lines Group--Part 1 Of 2--Type 1
| 7D***30 | Scraper Pump And Lines Group | 1 |
7d5430 Scraper Pump And Lines Group-Part 2 Of 2--Type 1
| 7D***30 | Scraper Pump And Lines Group | 1 |
7d7060 Scraper Pump And Lines Group--Part 1 Of 2
| 7D***60 | Scraper Pump And Lines Group | 1 |
7d7060 Scraper Pump And Lines Group--Part 2 Of 2--Type 2
| 7D***60 | Scraper Pump And Lines Group | 1 |
7d5430 Scraper Pump And Lines Group--Part 1 Of 2-Type 2
| 7D***30 | Scraper Pump And Lines Group | 1 |
6j9931 Selector Valve Group
| 6J***31 | Selector Valve Group | 1 |
9k682 Shaft & Link Assembly
| 9K***82 | Shaft & Link As | 1 |
6d6355 Brake Shield Group
| 6D***55 | Shield Group-Brake | 1 |
7j9343 Single Lever Bowl And Apron Control Group
| 7J***43 | Single Lever Bowl And Apron Control Group | 1 |
6j5504 Single Lever Bowl And Apron Control Group--Type 2
| 6J***04 | Single Lever Bowl And Apron Control Group | 1 |
6j5504 Single Lever Bowl And Apron Control Group--Type 1
| 6J***04 | Single Lever Bowl And Apron Control Group | 1 |
2g4390 Sliding Window Group--Side
| 2G***90 | Sliding Window Group | 1 |
2g4370 Sliding Window Group--Rear
| 2G***70 | Sliding Window Group | 1 |
7d5450 Steering Gear Group--As Viewed From Right Hand Side Of Machine--Type 1 - Part 1 Of 2
| 7D***50 | Steering Gear Group | 1 |
7d5450 Steering Gear Group--As Viewed From Right Hand Side Of Machine--Type 2 - Part 1 Of 2
| 7D***50 | Steering Gear Group | 1 |
7d5450 Steering Gear Group--As Viewed From Front Of Machine--Type 2 - Part 2 Of 2
| 7D***50 | Steering Gear Group | 1 |
7d5450 Steering Gear Group--As Viewed From Front Of Machine--Type 1 - Part 2 Of 2
| 7D***50 | Steering Gear Group | 1 |
7d5420 Steering Pump And Lines Group--Part 1 Of 2 - Type 1
| 7D***20 | Steering Pump And Lines Group | 1 |
7d5420 Steering Pump And Lines Group--Part 2 Of 2 - Type 1
| 7D***20 | Steering Pump And Lines Group | 1 |
7d5420 Steering Pump And Lines Group--Part 1 Of 2--Type 2
| 7D***20 | Steering Pump And Lines Group | 1 |
7d5420 Steering Pump And Lines Group--Part 2 Of 2--Type 2
| 7D***20 | Steering Pump And Lines Group | 1 |
8p5349 Switch Assembly--Thermostat--Type 2
| 8P***49 | Switch As; Switch Assembly--To Bracket Assembly | 1 |
8p5349 Switch Assembly--Thermostat--Type 1
| 8P***49 | Switch As; Switch Assembly--To Bracket Assembly | 1 |
9s7978 Hand Tool Group
| 9S***78 | Tool Group-Hand | 1 |
6d3782 Control Valve Assembly
| 6D***82 | Valve As; -- Emergency Control | 1 |
6d3943 Retarder Valve Assembly
| 6D***43 | Valve As | 1 |
2r618 Double Check Valve Assembly
| 2R***18 | Valve As-Check | 1 |
4j8500 Control Valve Assembly
| 4J***00 | Valve As-Control | 1 |
2p5802 Retarder Control Valve Group--Type 3
| 2P***02 | Valve Group-Retarder Control | 1 |
2p5802 Retarder Control Valve Group--Type 2
| 2P***02 | Valve Group-Retarder Control | 1 |
8p7703 Retarder Control Valve Group
| 8P***03 | Valve Group-Retarder Control; (Control) | 1 |
2p5802 Retarder Control Valve Group--Type 1
| 2P***02 | Valve Group-Retarder Control | 1 |
8d4170 Vandalism Protection Arrangement
| 2S***96 | Cover Group-Protection; Protection Cover Group-- Radiator Cap | 1 |
| 5D***00 | Cover Group-Protection; Protection Cover Group-- Hydraulic Tank Cap | 1 |
| 5D***20 | Protection Cover Group-Fuel Tank Cap; Protection Cover Group | 1 |
7d4710 Vandalism Guard Group--Type 2
| 7D***10 | Vandalism Protection Group; Vandalism Guard Group | 1 |
7d4710 Vandalism Guard Group--Type 1
| 7D***10 | Vandalism Protection Group; Vandalism Guard Group | 1 |
Windshield
9d4640 Windshield Wiper Group--24 Volt--Type 1
| 9D***40 | Windshield Wiper Group | 1 |
6d9750 Windshield Wiper Group--24 Volt--Type 2
| 6D***50 | Windshield Wiper Group | 1 |
8d1452 Wiper Group--24 Volt
| 8D***52 | Windshield Wiper Group | 1 |
9d4640 Windshield Wiper Group--24 Volt--Type 2
| 9D***40 | Windshield Wiper Group | 1 |
6d9750 Windshield Wiper Group--24 Volt--Type 1
| 6D***50 | Windshield Wiper Group | 1 |
1v4358 Basic Wiper Group--24 Volt--Field Installation
| 1V***58 | Wiper Group; Basic Wiper Group | 1 |
1v3079 Basic Wiper Group--24 Volt
| 1V***79 | Wiper Group | 1 |
Diesel Engine
Air Aftercooler (2p8674 N/S)
| 2P***74 | Aftercooler | 1 |
Air Aftercooler (9s2601 N/S)
| 9S***01 | Air Aftercooler | 1 |
Air Cleaner (6d9400 N/S)
| 6D***00 | Air Cleaner | 1 |
9s2598 Air Cleaner Assembly
| 9S***98 | Air Cleaner Assembly | 1 |
1p5013 Air Compressor Group
| 1P***13 | Air Compressor Group | 1 |
Air Compressor (7s8404 N/S)
| 7S***04 | Air Compressor Group | 1 |
5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 1 Of 2--Type 2
| 5S***88 | Alternator Group-Charging | 1 |
5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 2 Of 2--Type 2
| 5S***88 | Alternator Group-Charging | 1 |
5s9088 Alternator Assembly-24 Volt, 50 Ampere-Part 2 Of 2--Type 1
| 5S***88 | Alternator Group-Charging | 1 |
5s9088 Alternator Assembly-24 Volt, 50 Ampere-Part 1 Of 2--Type 1
| 5S***88 | Alternator Group-Charging | 1 |
Alternator (8s5071 N/S)--24 Volt, 50 Ampere
| 8S***71 | Alternator Group-Charging | 1 |
Battery, Wiring And Lighting (7d1700 N/S)--24 Volt--Part 3 Of 5
| 7D***00 | Battery, Wiring And Lighting System | 1 |
Battery, Wiring And Lighting System (7d1700 N/S)-24 Volt-Part 3 Of 4
| 7D***00 | Battery, Wiring And Lighting System | 1 |
Battery, Wiring And Lighting System (7d1700 N/S)--24 Volt--Part 1 Of 4
| 7D***00 | Battery, Wiring And Lighting System | 1 |
Battery, Wiring And Lighting System (7d1700 N/S)--24 Volt--Part 4 Of 4
| 7D***00 | Battery, Wiring And Lighting System | 1 |
Battery, Wiring And Lighting (7d1700 N/S)--24 Volt--Part 1 Of 5
| 7D***00 | Battery, Wiring And Lighting System | 1 |
Battery, Wiring And Lighting (7d1700 N/S)--24 Volt--Part 4 Of 5
| 7D***00 | Battery, Wiring And Lighting System | 1 |
Battery, Wiring And Lighting (7d1700 N/S)--24 Volt--Part 5 Of 5
| 7D***00 | Battery, Wiring And Lighting System | 1 |
Battery, Wiring And Lighting (7d1700 N/S)--24 Volt--Part 2 Of 4
| 7D***00 | Battery, Wiring And Lighting System | 1 |
Battery, Wiring And Lighting (7d1700 N/S)--24 Volt--Part 1 Of 4
| 7D***00 | Battery, Wiring And Lighting System | 1 |
Battery, Wiring And Lighting (7d1700 N/S)--24 Volt--Part 4 Of 4
| 7D***00 | Battery, Wiring And Lighting System | 1 |
Battery, Wiring And Lighting System (7d1700 N/S)-24 Volt-Part 1 Of 4
| 7D***00 | Battery, Wiring And Lighting System | 1 |
Battery, Wiring And Lighting (7d1700 N/S)--24 Volt--Part 2 Of 5
| 7D***00 | Battery, Wiring And Lighting System | 1 |
Battery, Wiring And Lighting System (7d1700 N/S)--24 Volt--Part 3 Of 4
| 7D***00 | Battery, Wiring And Lighting System | 1 |
Battery, Wiring And Lighting (7d1700 N/S)--24 Volt--Part 3 Of 4
| 7D***00 | Battery, Wiring And Lighting System | 1 |
Blower Fan And Guard (3p162 N/S)
| 3P***62 | Blower Fan | 1 |
Blower Fan And Guard (8s6425 N/S)
| 8S***25 | Blower Fan And Guard | 1 |
Breather (9s1947 N/S)
| 9S***47 | Breather | 1 |
Breather (2p3169 N/S)
| 2P***69 | Breather Group | 1 |
Exhaust By-Pass (1p430 N/S)
| 1P***30 | Bypass Group-Exhaust | 1 |
Camshaft Drive (7s3586 N/S)
| 7S***86 | Camshaft Drive Group | 1 |
Camshaft (9s737 N/S)
| 9S***37 | Camshaft Group; Camshaft Group | 1 |
4d6377 Brake Chamber Assembly
| 4D***77 | Chamber As | 1 |
Connecting Rod And Piston (8s813 N/S)--6 Required
| 8S***13 | Connecting Rod And Piston; Connecting Rod And Piston Group | 1 |
2p8708 Fuel Ratio Control Group
| 2P***08 | Control Group-Fuel Ratio; Fuel Ratio Control Group | 1 |
Fuel Ratio Control (2p8708 N/S)
| 2P***08 | Control Group-Fuel Ratio; Fuel Ratio Control Group | 1 |
8s5072 Engine Oil Cooler Group
| 8S***72 | Cooler Group-Engine Oil | 1 |
Torque Converter Oil Cooler (8s5073 N/S)
| 8S***73 | Cooler Group-Torque Converter | 1 |
5d1900 Protection Cover Group--Hydraulic Tank Cap
| 5D***00 | Cover Group-Protection; Protection Cover Group-- Hydraulic Tank Cap | 1 |
9d630 Dust Cover Group
| 9D***30 | Cover-Dust | 1 |
Crankshaft Bearing Replacement
Crankshaft Bearing Replacement Groups
Crankshaft (1p4430 N/S)
| 1P***30 | Crankshaft Group; Crankshaft Group | 1 |
Cylinder Block Assembly (7s3601 N/S)
| 7S***01 | Cylinder Block | 1 |
Cylinder Block And Covers (8s5074 N/S)--End View-Part 2 Of 2
| 8S***74 | Cylinder Block Group | 1 |
Cylinder Block And Covers (8s5074 N/S)--End View--Part 2 Of 2
| 8S***74 | Cylinder Block Group | 1 |
Cylinder Block And Covers (8s5074 N/S)--Side View--Part 1 Of 2
| 8S***74 | Cylinder Block Group | 1 |
Cylinder Block And Covers (8s5074 N/S)--Side View-Part 1 Of 2
| 8S***74 | Cylinder Block Group | 1 |
Cylinder Head And Valve Mechanism (8s5075 N/S)--Side View--Part 1 Of 2
| 8S***75 | Cylinder Head & Valve Group | 1 |
8s5075 Cylinder Head And Valve Mechanism Group--Side View-Part 1 Of 2
| 8S***75 | Cylinder Head & Valve Group | 1 |
8s5075 Cylinder Head And Valve Mechanism Group--End View-Part 2 Of 2
| 8S***75 | Cylinder Head & Valve Group | 1 |
Cylinder Head And Valve Mechanism (8s5075 N/S)--End View--Part 2 Of 2
| 8S***75 | Cylinder Head & Valve Group | 1 |
Cylinder Head And Valve Mechanism (8s5075 N/S)--End View-Part 2 Of 2
| 8S***75 | Cylinder Head & Valve Group | 1 |
Drive Pulley And Damper (8s6449 N/S)
| 8S***49 | Damper & Pulley Group; Drive Pulley And Damper Group | 1 |
Damper (2p6500 N/S)
| 2P***00 | Damper Group | 1 |
5m1618 Dash Lamp Assembly--24 Volt
| 5M***18 | Dash Lamp Assembly | 1 |
8s5077 Transmission Scavenge Pump Drive Group
| 8S***77 | Drive Group | 1 |
Accessory Drive (8s5414 N/S)
| 8S***14 | Drive Group-Accessory; Accessory Drive Group | 1 |
Air Compressor Drive (9s700 N/S)
| 9S***00 | Drive Group-Air Compressor | 1 |
Camshaft Drive (2p1460 N/S)
| 2P***60 | Drive Group-Camshaft; Camshaft Drive Group | 1 |
Fan Drive (2p8785 N/S)--Side View--Part 1 Of 2
| 2P***85 | Drive Group-Fan | 1 |
Fan Drive (2p8785 N/S)--End View--Part 2 Of 2
| 2P***85 | Drive Group-Fan | 1 |
7s8405 Hydraulic Pump Drive Group
| 7S***05 | Drive Group-Pump | 1 |
Fan Drive And Support (8s5076 N/S)--End View--Part 2 Of 2
| 8S***76 | Fan Drive And Support | 1 |
Fan Drive And Support (8s5076 N/S)--Side View--Part 1 Of 2
| 8S***76 | Fan Drive And Support | 1 |
2g120 Fast Fill Fuel Adapter Group
| 2G***20 | Fast Fill Fuel Adapter Group | 1 |
2g115 Fast Fill Fuel Adapter Group
| 2G***15 | Fast Fill Fuel Adapter Group | 1 |
9m3223 Oil Filter Group
| 9M***23 | Filter Group-Engine Oil; Oil Filter Group | 1 |
Flywheel (7s9808 N/S)
Fuel Filter
1p2297 Fuel Priming Pump Assembly
| 1P***97 | Fuel Priming Pump Assembly | 1 |
6n9740 Fuel Priming Pump Barrel Assembly
| 6N***40 | Fuel Priming Pump Barrel Assembly | 1 |
8s5174 Fuel Pump Housing Group--Type 1
| 8S***74 | Fuel Pump Housing Group | 1 |
8s5174 Fuel Pump Housing Group
| 8S***74 | Fuel Pump Housing Group | 1 |
8s5174 Fuel Pump Housing Group--Type 2
| 8S***74 | Fuel Pump Housing Group | 1 |
8s5095 Fuel Ratio Control Group
| 8S***95 | Fuel Ratio Control Group | 1 |
Fuel System (6d8320 N/S)--210 U.S. Gallon
| 6D***20 | Fuel System | 1 |
6d8320 Fuel System Group--210 U.S. Gallon
| 6D***20 | Fuel System | 1 |
9d2060 Fuel Tank Group--210 U.S. Gallon - Type 1
| 9D***60 | Fuel Tank Group | 1 |
9d2060 Fuel Tank Group--210 U.S. Gallon--Type 2
| 9D***60 | Fuel Tank Group | 1 |
4n4873 Fuel Transfer Pump Group
| 4N***73 | Fuel Transfer Pump Group | 1 |
7s5445 Fuel Transfer Pump Group
| 7S***45 | Fuel Transfer Pump Group | 1 |
Fumes Disposal (9s1945 N/S)
| 9S***45 | Fumes Disposal | 1 |
Gasket Kits
| 1P***52 | Transmission Lubrication | 0 |
| 1P***53 | Transmission | 0 |
| 1P***54 | Transfer Gear | 0 |
7s4280 Glow Plug And Wiring Group--24 Volt
| 7S***80 | Glow Plug And Wiring Group | 1 |
Governor Control (7d1010 N/S)--Rear View - Part 2 Of 2
| 7D***10 | Governor Control | 1 |
Governor Control (7d1010 N/S)--Rear View--Part 2 Of 3
| 7D***10 | Governor Control | 1 |
Governor Control (7d1010 N/S)--As Viewed From Right Hand Side Of Machine--Part 1 Of 2
| 7D***10 | Governor Control | 1 |
Governor Control-Engine Mounted
Governor Control (7d1010 N/S)--As Viewed From Right Hand Side Of Machine--Part 3 Of 3
| 7D***10 | Governor Control | 1 |
Governor Control (7d1010 N/S)--As Viewed From Right Hand Side Of Machine--Part 1 Of 3
| 7D***10 | Governor Control | 1 |
9s5002 Governor Control Lever Service Group
| 9S***02 | Governor Control Lever Service Group | 1 |
8s5175 Governor Group--Side View--Field Installation--Type 2 - Part 1 Of 2
| 8S***75 | Governor Group | 1 |
2p8724 Governor Group--Part 2 Of 2
| 2P***24 | Governor Group | 1 |
2p8724 Governor Group--Part 1 Of 2
| 2P***24 | Governor Group | 1 |
8s5175 Governor Group--End View--Type 1 - Part 2 Of 2
| 8S***75 | Governor Group | 1 |
8s5175 Governor Group--End View--Field Installation--Type 2 - Part 2 Of 2
| 8S***75 | Governor Group | 1 |
8s5175 Governor Group--Side View--Field Installation--Type 3 - Part 1 Of 2
| 8S***75 | Governor Group | 1 |
8s5175 Governor Group--Side View--Type 1 - Part 1 Of 2
| 8S***75 | Governor Group | 1 |
8s5175 Governor Group--Side View--Type 4--Part 1 Of 2
| 8S***75 | Governor Group | 1 |
8s5175 Governor Group--End View--Field Installation--Type 3--Part 2 Of 2
| 8S***75 | Governor Group | 1 |
8s5175 Governor Group--End View--Type 4--Part 2 Of 2
| 8S***75 | Governor Group | 1 |
Governor Torque Spring (8s5565 N/S)
| 8S***65 | Governor Torque Spring | 1 |
8d8145 Vandalism Guard Group
| 8D***45 | Guard Group-Vandalism; Vandalism Guard Group | 1 |
6d7933 Harness Assembly
| 6D***33 | Harness Assembly | 1 |
7d1685 Harness Assembly
| 7D***85 | Harness Assembly | 1 |
2g930 Hour Meter Group--Factory Installation
| 2G***30 | Hour Meter Group | 1 |
5s5147 Head Lamp Group--24 Volt--Type 1
| 5S***47 | Lamp Group | 1 |
1m3379 Head Lamp Assembly--24 Volt--Type 1
| 1M***79 | Lamp Group | 1 |
1m3387 Dash Lamp Assembly--24 Volt
| 1M***87 | Lamp Group | 1 |
5s5147 Head Lamp Group--24 Volt--Type 2
| 5S***47 | Lamp Group | 1 |
1m3379 Head Lamp Assembly--24 Volt--Type 2
| 1M***79 | Lamp Group | 1 |
Rear Flood Lighting (9d4650 N/S)
| 9D***50 | Light Group | 1 |
Air Lines (8s5078 N/S)
| 8S***78 | Lines Group-Air | 1 |
7s3589 Oil Lines Group
| 7S***89 | Lines Group-Oil | 1 |
Oil Lines (7s3589 N/S)
| 7S***89 | Lines Group-Oil | 1 |
7m4291 Magnetic Switch Assembly
| 7M***91 | Magnetic Switch Assembly | 1 |
Manifolds
9s689 Fuel Injection Valves And Lines Group
| 9S***89 | Miscellaneous Group-Fuel Inj; Fuel Injection Valves And Lines Group | 1 |
Fuel Injection Valves And Lines (9s689 N/S)
| 9S***89 | Miscellaneous Group-Fuel Inj; Fuel Injection Valves And Lines Group | 1 |
2m1464 Motor Assembly--24 Volt--Part 1 Of 2
| 2M***64 | Motor Assembly | 1 |
2m1464 Motor Assembly--24 Volt--Part 2 Of 2
| 2M***64 | Motor Assembly | 1 |
Muffler (9s7988 N/S)
| 9S***88 | Muffler | 1 |
9m3202 Oil Filter Base Assembly--Top View
| 9M***02 | Oil Filter Base Assembly | 1 |
9s1195 Oil Pump Assembly
| 9S***95 | Oil Pump Assembly | 1 |
6n2994 Glow Plug Group--24 Volt
| 6N***94 | Plug Group-Glow; Glow Plug Group | 1 |
8s7608 Primary Fuel Filter Group
| 8S***08 | Primary Fuel Filter Group | 1 |
5d1920 Protection Cover Group--Fuel Tank Cap
| 5D***20 | Protection Cover Group-Fuel Tank Cap; Protection Cover Group | 1 |
Fuel Pump Housing And Governor (8s5176 N/S)
| 8S***76 | Pump & Governor Group; Fuel Pump Housing And Governor Group | 1 |
Oil Pump (1m7037 N/S)
| 1M***37 | Pump Group-Oil; Oil Pump Group | 1 |
Radiator (8s5081 N/S)--Rear View - Part 1 Of 2
| 8S***81 | Radiator | 1 |
Radiator (2p8921 N/S)--Part 1 Of 2
| 2P***21 | Radiator | 1 |
2p8921 Radiator Group--Part 2 Of 2
| 2P***21 | Radiator | 1 |
Radiator (8s5081 N/S)--Side View - Part 2 Of 2
| 8S***81 | Radiator | 1 |
Radiator (2p8921 N/S)--Part 2 Of 2
| 2P***21 | Radiator | 1 |
2p8921 Radiator Group--Part 1 Of 2
| 2P***21 | Radiator | 1 |
Radiator Guard And Support (8d6080 N/S)
| 8D***80 | Radiator Guard | 1 |
Radiator Guard (7d7650 N/S)
| 7D***50 | Radiator Guard | 1 |
Radiator Guard And Support (7d5540 N/S
| 7D***40 | Radiator Guard And Support | 1 |
1p666 Regulator Group
| 1P***66 | Regulator Group | 1 |
Service Meter
9s5730 Service Meter And Tachometer Drive Group
| 9S***30 | Service Meter And Tachometer Drive Group | 1 |
1m7039 Electric Starting Motor Group--24 Volt
| 1M***39 | Starter Group-Electric; Electric Starter Group | 1 |
4n3273 Motor Group--Part 1 Of 2
| 4N***73 | Starting Motor Group | 1 |
4n3273 Motor Group--Part 2 Of 2
| 4N***73 | Starting Motor Group | 1 |
Engine Support (8s5082 N/S)
| 8S***82 | Support Group-Engine | 1 |
7h7290 Disconnect Switch Assembly
| 7H***90 | Switch As-Disconnect | 1 |
4m1812 Solenoid Switch Assembly
| 4M***12 | Switch As-Solenoid | 1 |
6n5123 Solenoid Switch Assembly
| 6N***23 | Switch As-Solenoid | 1 |
3s5254 Throttle Valve Assembly
| 3S***54 | Throttle Valve Assembly | 1 |
Governor Torque Spring (4n4262 N/S)
| 4N***62 | Torque Control Group | 1 |
8s6548 Turbocharger Assembly
| 8S***48 | Turbocharger Assembly | 1 |
4n5639 Turbocharger Group (8s5464 N/S)
| 4N***39 | Turbocharger Group | 1 |
4d7695 Control Valve Assembly
| 4D***95 | Valve Group-Air; (Air Control) | 1 |
8s5115 Variable Timing Drive Assembly
| 8S***15 | Variable Timing Drive Assembly | 1 |
4n4788 Variable Timing Drive Assembly
| 4N***88 | Variable Timing Drive Assembly | 1 |
Water Lines (8s5079 N/S)
| 8S***79 | Water Lines | 1 |
Water Lines (2p8869 N/S)
| 2P***69 | Water Lines | 1 |
8s5080 Water Pump Group
| 8S***80 | Water Pump Group | 1 |
Wiring Diagram--24 Volt System
8d9888 Harness Assembly
| 8D***88 | Wiring Harness Assembly | 1 |
Transmission And Chassis
3g726 Accumulator Group
| 3G***26 | Accumulator Group | 1 |
8s9121 Accumulator Group
| 8S***21 | Accumulator Group | 1 |
3g725 Accumulator Group
| 3G***25 | Accumulator Group | 1 |
Accumulator Lines (7j4905 N/S)
| 7J***05 | Accumulator Lines | 1 |
Air And Brake Control (8d9805 N/S)--Brake Valves And Lines--Part 3 Of 5
| 8D***05 | Air And Brake Control | 1 |
8d9805 Air And Brake Control Group--Brake Valves And Lines--Part 3 Of 5
| 8D***05 | Air And Brake Control | 1 |
8d9805 Air And Brake Control Group--Rotochambers, Valves And Lines--Part 1 Of 5
| 8D***05 | Air And Brake Control | 1 |
Air And Brake Control (6d9955 N/S)--Brake Valves And Lines--Part 3 Of 6
| 6D***55 | Air And Brake Control | 1 |
8d9805 Air And Brake Control Group--Air Tank, Horn, Valves And Lines--Part 5 Of 5
| 8D***05 | Air And Brake Control | 1 |
Air And Brake Control (6d9955 N/S)--Valves And Lines--Part 2 Of 6
| 6D***55 | Air And Brake Control | 1 |
Air And Brake Control (6d9955 N/S)--Rotochambers, Valves And Lines--Part 6 Of 6
| 6D***55 | Air And Brake Control | 1 |
8d9805 Air And Brake Control Group--Valves And Lines--Part 2 Of 5
| 8D***05 | Air And Brake Control | 1 |
Air And Brake Control (8d9805 N/S)--Valves And Lines--Part 2 Of 5
| 8D***05 | Air And Brake Control | 1 |
8d9805 Air And Brake Control Group--Rotochambers, Valve And Lines--Part 1 Of 5
| 8D***05 | Air And Brake Control | 1 |
Air And Brake Control (8d9805 N/S)--Brake Valves And Lines--Part 4 Of 5
| 8D***05 | Air And Brake Control | 1 |
Air And Brake Control (8d9805 N/S)--Rotochambers, Valves And Lines--Part 1 Of 5
| 8D***05 | Air And Brake Control | 1 |
Air And Brake Control (6d9955 N/S)--Air Tanks, Valves And Lines--Part 5 Of 6
| 6D***55 | Air And Brake Control | 1 |
Air And Brake Control (8d9805 N/S)--Air Tanks, Valves And Lines--Part 5 Of 5
| 8D***05 | Air And Brake Control | 1 |
8d9805 Air And Brake Control Group--Brake Valves And Lines--Part 4 Of 5
| 8D***05 | Air And Brake Control | 1 |
Air And Brake Control (6d9955 N/S)--Brake Valves And Lines--Part 4 Of 6
| 6D***55 | Air And Brake Control | 1 |
8d9805 Air And Brake Control Group--Valve And Lines--Part 2 Of 5
| 8D***05 | Air And Brake Control | 1 |
8d9805 Air And Brake Control Group--Air Tanks, Horn, Valves And Lines--Part 5 Of 5
| 8D***05 | Air And Brake Control | 1 |
Air And Brake Control (8d9805 N/S)--Air Tanks, Horn, Valves And Lines--Part 5 Of 5
| 8D***05 | Air And Brake Control | 1 |
Air And Brake Control (6d9955 N/S)--Horn, Valves And Lines--Part 1 Of 6
| 6D***55 | Air And Brake Control | 1 |
9s2822 Automatic Selector Valve Group
| 9S***22 | Automatic Selector Valve Group | 1 |
Bail (7j1222 N/S)
7j2377 Bail Cylinder Group--3.50" Bore X 30.26" Stroke
| 7J***77 | Bail Cylinder Group | 1 |
Bowl And Apron Control (9d4930 N/S)--Single Lever
| 9D***30 | Bowl And Apron Control | 1 |
5d3640 Brake Valve Assembly
| 5D***40 | Brake Valve Assembly | 1 |
3j9522 Brake Group
| 3J***22 | Brakes | 1 |
Brakes (3j9522 N/S)
| 3J***22 | Brakes | 1 |
Bumper (8d4090 N/S)--Part 1 Of 2
| 8D***90 | Bumper | 1 |
Bumper (7d4730 N/S)--Part 1 Of 2
| 7D***30 | Bumper | 1 |
Bumper (7d4730 N/S)--Part 2 Of 2
| 7D***30 | Bumper | 1 |
Bumper (8d4090 N/S)--Part 2 Of 2
| 8D***90 | Bumper | 1 |
Bumper (6d9730 N/S)--Part 2 Of 2
| 6D***30 | Bumper | 1 |
Bumper (6d9730 N/S)--Part 1 Of 2
| 6D***30 | Bumper | 1 |
9j3954 Filter By-Pass Group
| 9J***54 | Bypass Group-Filter; -Hydraulic Oil | 1 |
3g2804 Cartridge Group--15 Gpm
| 3G***04 | Cartridge Group | 1 |
3g2750 Cartridge Group--8 Gpm--Clockwise Rotation
| 3G***50 | Cartridge Group | 1 |
3g2235 Cartridge Group--60 Gpm--Clockwise Rotation
| 3G***35 | Cartridge Group | 1 |
3g2747 Cartridge Group--50 Gpm
| 3G***47 | Cartridge Group | 1 |
3g7660 Cartridge Group--189l/Min (50 Gpm)
| 3G***60 | Cartridge Group; -Secondary Steering | 1 |
1u2671 Cartridge Group--227 L/Min (60 Gpm)
| 1U***71 | Cartridge Group | 1 |
1u2664 Cartridge Group--30 L/Min (8 Gpm)
| 1U***64 | Cartridge Group | 1 |
3g7663 Cartridge Group--64l/Min (17 Gpm)
| 3G***63 | Cartridge Group-Vane Pump; -Rear | 1 |
2g1093 Case And Frame Assembly
| 2G***93 | Case And Frame Assembly | 1 |
6j349 Check Valve Group
| 6J***49 | Check Valve Group | 1 |
8j8800 Control Lever Housing Group
| 8J***00 | Control Lever Housing Group | 1 |
9j2056 Control Valve Group--Part 2 Of 2
| 9J***56 | Control Valve Group | 1 |
9j2056 Control Valve Group--Part 1 Of 2
| 9J***56 | Control Valve Group | 1 |
7j9131 Control Valve Group--Part 1 Of 2
| 7J***31 | Control Valve Group | 1 |
9d8220 Valve Control Group
| 9D***20 | Control Valve Group | 1 |
6g6670 Valve Control Group
| 6G***70 | Control Valve Group | 1 |
7j9131 Control Valve Group--Part 2 Of 2
| 7J***31 | Control Valve Group | 1 |
8d5730 Crankcase Guard Group
| 8D***30 | Crankcase Guard | 1 |
Crankcase Guard (7d4620 N/S)
| 7D***20 | Crankcase Guard | 1 |
Crankcase Guard (6d8640 N/S)
| 6D***40 | Crankcase Guard | 1 |
9d4370 Crankcase Guard Group
| 9D***70 | Crankcase Guard Group | 1 |
Cushion Hitch (9j989 N/S)--Part 1 Of 3
| 9J***89 | Cushion Hitch | 1 |
Cushion Hitch (9j989 N/S)--Part 2 Of 3
| 9J***89 | Cushion Hitch | 1 |
Cushion Hitch (9j989 N/S)--Part 3 Of 3
| 9J***89 | Cushion Hitch | 1 |
Hitch And Steering (7j3575 N/S)--Part 3 Of 3
| 7J***75 | Cushion Hitch And Steering | 1 |
Hitch And Steering (7j3575 N/S)--Part 2 Of 3
| 7J***75 | Cushion Hitch And Steering | 1 |
Hitch And Steering (7j3575 N/S)--Part 1 Of 3
| 7J***75 | Cushion Hitch And Steering | 1 |
Cushion Hitch Lines (7j3762 N/S)
| 7J***62 | Cushion Hitch Lines | 1 |
9j336 Cushion Hitch Lines Group
| 9J***36 | Cushion Hitch Lines | 1 |
Cushion Hitch Lines And Valve (7d5370 N/S)--Part 2 Of 2
| 7D***70 | Cushion Hitch Lines And Valve | 1 |
Cushion Hitch Lines And Valve (7d5370 N/S)--Part 1 Of 2
| 7D***70 | Cushion Hitch Lines And Valve | 1 |
Cushion Hitch Valve (7j631 N/S)--Part 1 Of 2
| 7J***31 | Cushion Hitch Valve | 1 |
Cushion Hitch Valves (7j631 N/S)--Part 2 Of 2
| 7J***31 | Cushion Hitch Valve | 1 |
Cushion Hitch Valve (7j631 N/S)--Part 2 Of 2
| 7J***31 | Cushion Hitch Valve | 1 |
Cushion Hitch Valves (7j631 N/S)--Part 1 Of 2
| 7J***31 | Cushion Hitch Valve | 1 |
9j8774 Steering Cylinder Group--(Change 0)--2" Bore X 5" Stroke
| 9J***74 | Cylinder Group Steering Servo | 1 |
Differential And Bevel Gear (6d7710 N/S)--Part 1 Of 2
| 6D***10 | Differential And Bevel Gear | 1 |
Differential And Bevel Gear (6d7710 N/S)--Part 2 Of 2
| 6D***10 | Differential And Bevel Gear | 1 |
Differential Case And Covers (6d8380 N/S)--Part 1 Of 2
| 6D***80 | Differential Case And Covers | 1 |
6d8380 Differential Case And Covers Group--Part 3 Of 3
| 6D***80 | Differential Case And Covers | 1 |
6d8380 Differential Case And Covers Group--Part 1 Of 3
| 6D***80 | Differential Case And Covers | 1 |
Differential Case And Covers (6d8380 N/S)--Part 2 Of 2
| 6D***80 | Differential Case And Covers | 1 |
Differential Case And Covers (7d4650 N/S)--Part 1 Of 2
| 7D***50 | Differential Case And Covers | 1 |
Differential Case And Covers (7d4650 N/S)--Part 2 Of 2
| 7D***50 | Differential Case And Covers | 1 |
6d8380 Differential Case And Covers Group--Part 2 Of 3
| 6D***80 | Differential Case And Covers | 1 |
8d270 Differential Group
| 8D***70 | Differential Group | 1 |
6d7700 Differential Group
| 6D***00 | Differential Group | 1 |
4d5730 Differential Group
| 4D***30 | Differential Group | 1 |
8d5610 Differential Group
| 8D***10 | Differential Group | 1 |
Drive Shaft (6d7825 N/S)
| 6D***25 | Drive Shaft | 1 |
Drive Shaft Guard (6d7830 N/S)
| 6D***30 | Drive Shaft Guard | 1 |
Emergency Brake Control (7d5170 N/S)--Part 2 Of 2
| 7D***70 | Emergency Brake Control | 1 |
Emergency Brake Control (7d5170 N/S)--Part 1 Of 2
| 7D***70 | Emergency Brake Control | 1 |
Fenders (6d9370 N/S)
| 6D***70 | Fenders | 1 |
6d9110 Filter Group
| 6D***10 | Filter Group | 1 |
7j680 Hydraulic Oil Filter Group
| 7J***80 | Filter Group-Hydraulic Oil | 1 |
2s6457 Transmission Filter Group
| 2S***57 | Filter Group-Transmission; (Transmission) | 1 |
Final Drive And Wheels (7d1690 N/S)--33.25 X 35 Tubeless Tires
| 7D***90 | Final Drive And Wheels | 1 |
7d1690 Final Drive And Wheel Group--33.25 X 35 Tubeless Tires
| 7D***90 | Final Drive And Wheels | 1 |
7j2231 Flow Control And Relief Valve Group--Type 3
| 7J***31 | Flow Control And Relief Valve Group | 1 |
7j2231 Flow Control And Relief Valve Group--Type 1
| 7J***31 | Flow Control And Relief Valve Group | 1 |
7j2231 Flow Control And Relief Valve Group--Type 2
| 7J***31 | Flow Control And Relief Valve Group | 1 |
7d1890 Gauge Group--Part 2 Of 2
| 7D***90 | Gauges | 1 |
Gauges (7d1890 N/S)--Part 2 Of 2
| 7D***90 | Gauges | 1 |
Gauges (7d1890 N/S)--Part 1 Of 2
| 7D***90 | Gauges | 1 |
7d1890 Gauge Group--Part 1 Of 2
| 7D***90 | Gauges | 1 |
Governor And Drive (5s7930 N/S)
| 5S***30 | Governor & Drive Group | 1 |
1p2569 Governor Cut-Off Valve Group
| 1P***69 | Governor Cut-Off Valve Group | 1 |
3p3036 Governor Cut-Off Valve Group
| 3P***36 | Governor Cut-Off Valve Group | 1 |
8s6340 Governor Group
| 8S***40 | Governor Group | 1 |
3g2360 Hitch Group--Field Installation
| 3G***60 | Hitch Group | 1 |
7j3665 Hitch Group--Field Installation
| 7J***65 | Hitch Group | 1 |
Hood (6d9500 N/S)
Hood And Dash (8d6060 N/S)
| 8D***60 | Hood And Dash | 1 |
5d6998 Air Horn Assembly
| 5D***98 | Horn Group-Air | 1 |
8v1723 Hose Assembly
| 3S***66 | Sleeve Assem. | 2 |
| 5S***83 | Coupling Assem. (Straight) | 1 |
| 5S***02 | Stem Assembly-- 90 Degrees | 1 |
9j2026 Control Lever Housing Group
| 9J***26 | Housing Group-Lever | 1 |
5j5427 Control Level Housing Group
| 5J***27 | Housing Group-Lever | 1 |
7d680 Hydraulic Oil Filter Group
| 7D***80 | Hydraulic Oil Filter Group | 1 |
7j741 Hydraulic Pump Assembly
| 7J***41 | Hydraulic Pump Assembly | 1 |
Hydraulic Tank (6d9060 N/S)--Front View - Part 2 Of 2
| 6D***60 | Hydraulic Tank | 1 |
Hydraulic Tank (8d580 N/S)--Front View--Part 2 Of 2
| 8D***80 | Hydraulic Tank | 1 |
Hydraulic Tank (6d9060 N/S)--Side View - Part 1 Of 2
| 6D***60 | Hydraulic Tank | 1 |
Hydraulic Tank (8d580 N/S)--Side View - Part 1 Of 2
| 8D***80 | Hydraulic Tank | 1 |
Hydraulic Tank (8d580 N/S)--Front View - Part 2 Of 2
| 8D***80 | Hydraulic Tank | 1 |
9d8700 Hydraulic Tank Group--Front View--Type 2--Part 2 Of 2
| 9D***00 | Hydraulic Tank Group | 1 |
9d8700 Hydraulic Tank Group--Side View--Part 1 Of 2--Type 1
| 9D***00 | Hydraulic Tank Group | 1 |
9d8700 Hydraulic Tank Group--Side View--Part 1 Of 2
| 9D***00 | Hydraulic Tank Group | 1 |
9d8700 Hydraulic Tank Group--Front View--Part 2 Of 2--Type 1
| 9D***00 | Hydraulic Tank Group | 1 |
9d8700 Hydraulic Tank Group--Side View--Type 2--Part 1 Of 2
| 9D***00 | Hydraulic Tank Group | 1 |
9d8700 Hydraulic Tank Group--Front View--Part 2 Of 2
| 9D***00 | Hydraulic Tank Group | 1 |
9j4062 Internal Filter Group
| 9J***62 | Internal Filter Group | 1 |
7j8000 Internal Filter Group
| 7J***00 | Internal Filter Group | 1 |
6d4205 Low Air Indicator Lamp Assembly
| 6D***05 | Lamp Assembly | 1 |
7j3386 Load Cylinder Group (Change 0-1)--6" Bore X 9.60" Stroke
| 7J***86 | Load Cylinder Group | 1 |
9j537 Load Cylinder Group--(Change 0-1)--6.50" Bore X 9.80" Stroke
| 9J***37 | Load Cylinder Group | 1 |
Manifold And Screens (8s660 N/S)
| 8S***60 | Manifold & Screens Group | 1 |
7j2233 Pilot And Bleed Valve Group
| 7J***33 | Pilot And Bleed Valve Group | 1 |
Planetary Transmission (7s4601 N/S)--Part 2 Of 4
| 7S***01 | Planetary Group | 1 |
Planetary Transmission (7s4601 N/S)--Part 1 Of 4
| 7S***01 | Planetary Group | 1 |
Planetary Transmission (7s4601 N/S)--Part 4 Of 4
| 7S***01 | Planetary Group | 1 |
Planetary Transmission (7s4601 N/S)--Part 3 Of 4
| 7S***01 | Planetary Group | 1 |
7s4601 Planetary Transmission Group--Part 4 Of 4
| 7S***01 | Planetary Group | 1 |
7s4601 Planetary Transmission Group--Part 3 Of 4
| 7S***01 | Planetary Group | 1 |
7s4601 Planetary Transmission Group--Part 1 Of 4
| 7S***01 | Planetary Group | 1 |
7s4601 Planetary Transmission Group--Part 2 Of 4
| 7S***01 | Planetary Group | 1 |
Planetary Transmission--Part 3 Of 4
Planetary Transmission--Part 4 Of 4
Planetary Transmission--Part 2 Of 4
Planetary Transmission--Part 1 Of 4
2g600 Power Source Seat Conversion Group
| 06***21 | Adapter, Str., 1/4in. N.P.T. F. X 1/4in. J.I.C. M. | 1 |
| 1D***38 | Bolt-Top Tank,Bottom Tank To Accessory | 2 |
| 1D***07 | Bolt Bracket To Starting Engine Timing Gear Housing | 4 |
1p2570 Pressure Control Group
| 1P***70 | Pressure Control Group | 1 |
3p8531 Pressure Control Valve Group
| 3P***31 | Pressure Control Group | 1 |
9j6514 Pressure Reducing Valve Assembly
| 9J***14 | Pressure Reducing Valve Assembly | 1 |
1p4220 Gear Pump Group
| 1P***20 | Pump Group-Gear; -Transmission Scavenge | 1 |
7s4577 Transmission Pump Group
| 7S***77 | Pump Group-Transmission; (Transmission) | 1 |
9j5052 Vane Pump Group--Type 1
| 9J***52 | Pump Group-Vane | 1 |
9j5052 Vane Pump Group--Type 3
| 9J***52 | Pump Group-Vane | 1 |
9j5052 Vane Pump Group--Type 2
| 9J***52 | Pump Group-Vane | 1 |
9j7543 Push-Pull Block Group
| 9J***43 | Push-Pull Block Group | 1 |
8j5120 Push-Pull Block Group
| 8J***20 | Push-Pull Block Group | 1 |
Push-Pull Pump And Lines (7d5090 N/S)--Part 1 Of 2
| 7D***90 | Push-Pull Pump And Lines | 1 |
7d5090 Push-Pull Pump And Lines Group--Part 2 Of 2
| 7D***90 | Push-Pull Pump And Lines | 1 |
Push-Pull Pump And Lines (7d5090 N/S)--Part 2 Of 2
| 7D***90 | Push-Pull Pump And Lines | 1 |
7d5090 Push-Pull Pump And Lines Group--Part 1 Of 2
| 7D***90 | Push-Pull Pump And Lines | 1 |
4f6941 Release Valve Assembly
| 4F***41 | Release Valve Assembly | 1 |
2j2184 Rotochamber
| 2J***84 | Rotochamber As | 1 |
7d8560 Safety Tread Group
| 7D***60 | Safety Tread Group | 1 |
7s4578 Scavenge Pump Group
| 7S***78 | Scavenge Pump Group | 1 |
8s3380 Scavenge Pump Group
| 8S***80 | Scavenge Pump Group | 1 |
Scraper Hitch Lines (7d5850 N/S)--Part 1 Of 2
| 7D***50 | Scraper Hitch Lines | 1 |
Scraper Hitch Lines (7d5850 N/S)--Part 2 Of 2
| 7D***50 | Scraper Hitch Lines | 1 |
Scraper Pump And Lines (7d5550 N/S)--Part 1 Of 2
| 7D***50 | Scraper Pump And Lines | 1 |
Scraper Pump And Lines (7d2050 N/S)--Part 1 Of 2
| 7D***50 | Scraper Pump And Lines | 1 |
Scraper Pump And Lines (7d5550 N/S)--Part 2 Of 2
| 7D***50 | Scraper Pump And Lines | 1 |
Scraper Pump And Lines (7d2050 N/S)--Part 2 Of 2
| 7D***50 | Scraper Pump And Lines | 1 |
2g470 Suspension Seat Group--Type 1
Suspension Seat (2g470 N/S)
2g470 Suspension Seat Group
2g470 Suspension Seat Group--Type 2
2g470 Suspension Seat Group--Type 3
Seat Frame And Platform (7d350 N/S)--Part 1 Of 2
| 7D***50 | Seat Frame And Platform | 1 |
Seat Frame And Platform (9d220 N/S)--Part 2 Of 2
| 9D***20 | Seat Frame And Platform | 1 |
Seat Frame And Platform (9d220 N/S)--Part 1 Of 2
| 9D***20 | Seat Frame And Platform | 1 |
Seat Frame And Platform (7d350 N/S)--Part 2 Of 2
| 7D***50 | Seat Frame And Platform | 1 |
Seat Frame And Platform (2g490 N/S)--Part 1 Of 2
| 2G***90 | Seat Frame And Platform | 1 |
Seat Frame And Platform (2g490 N/S)--Part 2 Of 2
| 2G***90 | Seat Frame And Platform | 1 |
9d7019 Seat Group
| 9D***19 | Seat Group | 1 |
8d8920 Seat Group
| 8D***20 | Seat Group | 1 |
2g6470 Basic Seat Group
| 2G***70 | Seat Group | 1 |
8d9925 Seat Group
| 8D***25 | Seat Group | 1 |
2g6255 Seat Group--Replaced By 2g6470 Shown On Page 179f-4
| 2G***55 | Seat Group | 1 |
6g150 Basic Seat Group
| 6G***50 | Seat Group | 1 |
7d2269 Seat Suspension Assembly
| 7D***69 | Seat Suspension Assembly | 1 |
9d4720 Seat Suspension Group--Part 1 Of 2--Type 1
| 9D***20 | Seat Suspension Group | 1 |
2g2599 Seat Suspension Group--Part 1 Of 2
| 2G***99 | Seat Suspension Group | 1 |
2g5400 Seat Suspension Group--Part 1 Of 2
| 2G***00 | Seat Suspension Group | 1 |
9d4720 Seat Suspension Group--Part 2 Of 2--Type 1
| 9D***20 | Seat Suspension Group | 1 |
2g5400 Seat Suspension Group--Part 2 Of 2
| 2G***00 | Seat Suspension Group | 1 |
2g2599 Seat Suspension Group--Part 2 Of 2
| 2G***99 | Seat Suspension Group | 1 |
9d4720 Seat Suspension Group--Part 1 Of 2--Type 2
| 9D***20 | Seat Suspension Group | 1 |
2g6480 Seat Suspension Group--Part 2 Of 2--Replaces 2g5400 Shown On Pages 179m-1 And 179m-2
| 2G***80 | Seat Suspension Group | 1 |
2g6480 Seat Suspension Group--Part 1 Of 2--Replaces 2g5400 Shown On Pages 179m-1 And 179m-2
| 2G***80 | Seat Suspension Group | 1 |
9d4720 Seat Suspension Group--Part 2 Of 2--Type 2
| 9D***20 | Seat Suspension Group | 1 |
7s6937 Selector Valve Group
| 7S***37 | Selector Valve Group | 1 |
8j7344 Selector Valve Group
| 8J***44 | Selector Valve Group | 1 |
5j8606 Steering Cylinder Group--(Change 0-5)--1.5" Bore X 9.38" Stroke
| 5J***06 | Servo-Master Steering Cylinder Group | 1 |
9s2824 Shift Pressure Control Group
| 9S***24 | Shift Pressure Control Group | 1 |
5d5755 Slack Adjuster Assembly--R.H.
| 5D***55 | Slack Adjuster Assembly | 1 |
6j9266 Spring Group
| 6J***66 | Spring Group | 1 |
5j7806 Hydraulic Cylinder Group (Change 5,6)--6.5" Bore X 33.30" Stroke--2 Required
| 5J***06 | Steering Cylinder Group | 1 |
5j7806 Hydraulic Cylinder Group--6.5" Bore X 33.28" Stroke--2 Required
| 5J***06 | Steering Cylinder Group | 1 |
5j7977 Steering Cylinder Group--2" Bore X 5" Stroke
| 5J***77 | Steering Cylinder Group | 1 |
Steering Gear (7d100 N/S)--Part 1 Of 2
| 7D***00 | Steering Gear Group | 1 |
Steering Gear (7d100 N/S)--Part 2 Of 2
| 7D***00 | Steering Gear Group | 1 |
7d100 Steering Gear Group--Part 2 Of 2
| 7D***00 | Steering Gear Group | 1 |
7d100 Steering Gear Group--Part 1 Of 2
| 7D***00 | Steering Gear Group | 1 |
7j2547 Steering Lines Group--Type 2
| 7J***47 | Steering Lines Group | 1 |
7j2547 Steering Lines Group - Type 1
| 7J***47 | Steering Lines Group | 1 |
Steering Pump And Lines (7d2010 N/S)--Part 2 Of 2
| 7D***10 | Steering Pump And Lines Group | 1 |
Steering Pump And Lines (7d2010 N/S)--Part 1 Of 2
| 7D***10 | Steering Pump And Lines Group | 1 |
2g7753 Steering Suction Line Guard Group
| 2G***53 | Steering Suction Line Guard Group | 1 |
7j6785 Steering Valve Group--Part 2 Of 2
| 7J***85 | Steering Valve Group | 1 |
7j6785 Steering Valve Group--Part 1 Of 2
| 7J***85 | Steering Valve Group | 1 |
Bumper (8d6090 N/S)--Part 2 Of 2
| 8D***90 | Support And Bumper | 1 |
Bumper (8d6090 N/S)--Part 1 Of 2
| 8D***90 | Support And Bumper | 1 |
8s686 Manual Switch Group
| 8S***86 | Switch Group-Manual | 1 |
1t910 Torque Converter Group
| 1T***10 | Torque Converter Group | 1 |
Transfer Gears (7s2940 N/S)--Side View--Type 2--Part 2 Of 2
| 7S***40 | Transfer Gears | 1 |
Transfer Gears (7s2940 N/S)--End View--Type 1--Part 1 Of 2
| 7S***40 | Transfer Gears | 1 |
Transfer Gears (7s2940 N/S)--End View--Type 2--Part 1 Of 2
| 7S***40 | Transfer Gears | 1 |
Transfer Gears (7s2940 N/S)--Side View--Type 1--Part 2 Of 2
| 7S***40 | Transfer Gears | 1 |
Transfer Gears (7s2940 N/S)--End View--Part 1 Of 2
| 7S***40 | Transfer Gears | 1 |
Transfer Gears (7s2940 N/S)--Side View--Part 2 Of 2
| 7S***40 | Transfer Gears | 1 |
2p4361 Transmission Arrangement--Replaced By 7g2865 Shown On Page 77d
| 2P***61 | Transmission Arrangement | 1 |
7g2865 Transmission Arrangement
| 7G***65 | Transmission Arrangement | 1 |
8s637 Transmission Arrangement
| 8S***37 | Transmission Arrangement | 1 |
Transmission Case And Covers (7s4602 N/S)
| 7S***02 | Transmission Case And Covers | 1 |
Transmission Case And Covers (2p3665 N/S)
| 2P***65 | Transmission Case And Covers | 1 |
2p6905 Transmission Case Assembly--Type 2
| 2P***05 | Transmission Case Assembly | 1 |
2p6905 Transmission Case Assembly--Type 1
| 2P***05 | Transmission Case Assembly | 1 |
Transmission Control (6d8761 N/S)--As Viewed From Right Hand Side Of Machine--Part 1 Of 2
| 6D***61 | Transmission Control | 1 |
Transmission Control (6d8761 N/S)--As Viewed From R.H. Side Of Machine--Part 1 Of 2
| 6D***61 | Transmission Control | 1 |
Transmission Control (6d8761 N/S)--As Viewed From R.H. Side Of Machine--Part 2 Of 2
| 6D***61 | Transmission Control | 1 |
Transmission Control (6d8761 N/S)--As Viewed From Right Hand Side Of Machine--Part 2 Of 2
| 6D***61 | Transmission Control | 1 |
1p9605 Transmission Hydraulic Control Group--Part 2 Of 3--Type 2
| 1P***05 | Transmission Hydraulic Control | 1 |
1p9605 Transmission Hydraulic Control Group--Part 3 Of 3--Type 2
| 1P***05 | Transmission Hydraulic Control | 1 |
1p9605 Transmission Hydraulic Control Group--Part 2 Of 3--Type 3
| 1P***05 | Transmission Hydraulic Control | 1 |
Transmission Hydraulic Control (1p9605 N/S)--Part 2 Of 3
| 1P***05 | Transmission Hydraulic Control | 1 |
1p9605 Transmission Hydraulic Control Group--Part 1 Of 3--Type 3
| 1P***05 | Transmission Hydraulic Control | 1 |
Transmission Hydraulic Control (1p9605 N/S)--Part 2 Of 3--Type 1
| 1P***05 | Transmission Hydraulic Control | 1 |
1p9605 Transmission Hydraulic Control Group--Part 3 Of 3--Type 3
| 1P***05 | Transmission Hydraulic Control | 1 |
Transmission Hydraulic Control (1p9605 N/S)--Part 3 Of 3
| 1P***05 | Transmission Hydraulic Control | 1 |
1p9605 Transmission Hydraulic Control Group--Part 1 Of 3--Type 2
| 1P***05 | Transmission Hydraulic Control | 1 |
Transmission Hydraulic Control (1p9605 N/S)--Part 3 Of 3--Type 1
| 1P***05 | Transmission Hydraulic Control | 1 |
Transmission Hydraulic Control (7s8666 N/S)--Part 2 Of 2
| 7S***66 | Transmission Hydraulic Control | 1 |
Transmission Hydraulic Control (1p9605 N/S)--Part 1 Of 3
| 1P***05 | Transmission Hydraulic Control | 1 |
Transmission Hydraulic Control (7s8666 N/S)--Part 1 Of 2
| 7S***66 | Transmission Hydraulic Control | 1 |
Transmission Hydraulic Control (1p9605 N/S)--Part 1 Of 3--Type 1
| 1P***05 | Transmission Hydraulic Control | 1 |
7g2927 Transmission Hydraulic Control Arrangement--Part 3 Of 3
| 7G***27 | Transmission Hydraulic Control Arrangement | 1 |
7g2927 Transmission Hydraulic Control Arrangement--Part 2 Of 3
| 7G***27 | Transmission Hydraulic Control Arrangement | 1 |
7g2927 Transmission Hydraulic Control Arrangement--Part 1 Of 3
| 7G***27 | Transmission Hydraulic Control Arrangement | 1 |
Transmission Pump And Lines (7d1330 N/S)
| 7D***30 | Transmission Pump And Lines | 1 |
4d2287 Valve Assembly
| 4D***87 | Valve As; -Parking, Service | 1 |
6d856 Valve Assembly
| 6D***56 | Valve As; -Differential Lock-Parking Brake | 1 |
6d1039 Valve Assembly
| 6D***39 | Valve As; -Exhaust Bypass-Exhaust Diverter | 1 |
4d487 Check Valve Assembly
| 4D***87 | Valve As-Check; -Air Supply-Primary Air Tank-Service Brake Control | 1 |
7d2316 Control Valve Assembly
| 7D***16 | Valve As-Control | 1 |
5d3056 Double Check Valve Assembly
| 5D***56 | Valve As-Double Check; -Brakesaver Air Supply | 1 |
3d9943 Horn Valve
| 3D***43 | Valve As-Horn | 1 |
6d3546 Safety Valve Assembly
| 6D***46 | Valve As-Safety | 1 |
4d1669 Control Valve Assembly--Three Way
| 4D***69 | Valve Assembly | 1 |
7j5942 Valve Group--Type 2
| 7J***42 | Valve Group | 1 |
7j5942 Valve Group--Type 3
| 7J***42 | Valve Group | 1 |
7j5942 Valve Group - Type 1
| 7J***42 | Valve Group | 1 |
3p6661 Automatic Selector Valve Group
| 3P***61 | Valve Group-Automatic | 1 |
2r619 Double Check Valve Assembly
| 2R***19 | Valve Group-Check; -Air System-Parking Brake-Scraper Brake-Service Brake Control | 1 |
6p3233 Pressure Control Valve Group
| 6P***33 | Valve Group-Pressure Control | 1 |
5d470 Quick Release Valve Group
| 5D***70 | Valve Group-Quick Release; -Parking Brake-Air | 1 |
6j60 Relief Valve Group
| 6J***60 | Valve Group-Relief; -Trailing Unit Main Control | 1 |
8p4221 Selector Valve Group
| 8P***21 | Valve Group-Selector | 1 |
7j4012 Selector Valve Group
| 7J***12 | Valve Group-Selector | 1 |
3p2973 Shift Pressure Control Group
| 3P***73 | Valve Group-Shift Pressure | 1 |
9j5063 Vane Pump Group--Type 2
| 9J***63 | Vane Pump Group | 1 |
9j5063 Vane Pump Group--Type 3
| 9J***63 | Vane Pump Group | 1 |
7j6258 Vane Pump Group
| 7J***58 | Vane Pump Group | 1 |
9j5063 Vane Pump Group - Type 1
| 9J***63 | Vane Pump Group | 1 |
637 serial number reference
The PIN plate is riveted to the tractor unit's frame, typically on the lower frame rail near the front hitch/draft area below the cab; because the 637 is a two-piece articulated tractor-scraper, the tractor half and the scraper bowl each carry their own plate and PIN. Read the first three characters as the serial prefix, which ties to the model/series and engine pairing; the digits that follow are the sequential unit number.
| Prefix | Identifies | Notes |
|---|---|---|
| 64M | 637 (Series I) — scraper unit | Scraper-side PIN on the original twin-engine 637. Scraper engine is a D333 diesel. Paired with the tractor-side 65M range; both belong to the earliest 1970 production. |
| 65M | 637 (Series I) — tractor unit | Tractor-side PIN, paired with the scraper-side 64M range. Tractor engine is a D343 diesel; combined tractor/scraper output is rated near 480 kW (640 hp). Cat's 637C running-change falls inside this same serial band — no separate 637C prefix was ever opened, so 637C is a spec update within 64M/65M, not a distinct PIN series. |
| 79P | 637 (Series I) — tractor unit | Tractor-side PIN, same family as 65M. Only one clear listing found tying this prefix to the tractor unit — confirm with dealer. |
| 91N | 637 (Series I) — scraper unit | Scraper-side PIN, same D333 scraper engine as 64M, separate serial range from the same early-production era. |
| 92N | 637 (Series I) — scraper unit | Scraper-side PIN, paired with 91N in period parts documentation. Same D333 scraper engine and production era. |
Frequently asked questions
What engines does the original Cat 637 use?
This is a twin-engine machine. A Caterpillar D343 diesel powers the tractor unit and a separate Caterpillar D333 diesel is mounted on the scraper unit, together producing roughly 640 gross flywheel horsepower. This is a different pairing from the modern 637K, which uses a single C18 tractor engine and a C9.3 scraper engine under the same reused model number.
How much does this machine weigh, and how big is it?
Expect an operating class in the neighborhood of 45 to 52 metric tons (roughly 100,000 to 115,000 lb) for this twin-engine open-bowl class, with bowl capacity in the low-30 cubic-yard heaped range. An exact factory weight and dimension figure specific to the original 1970 D343/D333 build is not well documented in circulation today; confirm against the machine's own data plate or original Caterpillar literature rather than assuming later-generation figures apply.
What replaced this machine in the model line?
Caterpillar replaced this original twin D343/D333 machine with the 637D starting in 1979, followed by the 637E and 637E Series II, then the 637G, and now the 637K. Each later generation moved to different engines and, eventually, electronic controls; none of them share the D343/D333 engine pairing that defines this original 1970s 637.
What 637 owners discuss
What's the real-world reputation of the D343 tractor engine in the original 637?
It's talked about as a genuinely strong motor for its era: overhead cam design with four valves per cylinder, turbocharged and intercooled, which was ahead of most construction diesels running at the time. Owners who've kept these going call it a great engine with a good reputation, but they also warn it's expensive to repair once you're inside it. A recurring headache on D343-powered machines that sat unused for a long stretch: diesel works its way past the injection system into the crankcase over time, so a machine that hasn't run in years can show fuel-diluted oil pouring out the breather before you even try a cold start. Pull the dipstick and smell the oil before cranking any 637 that's been sitting.
Any quirks specific to the D333 scraper-unit engine?
First thing is nailing down exactly which D333 variant you've got. The different generations have different bore sizes and different valve cover and water pump arrangements, and parts aren't interchangeable between them, so misidentifying it gets you the wrong gasket set or bearings. The bigger headache shows up at rebuild time: the factory-style flanged crank thrust bearing has gone obsolete in the larger undersize grinds from the major bearing makers and from Cat, so a spun or badly worn crank often means converting to loose thrust washers, doweling the bearing cap to hold them in place, and setting end play by hand rather than ordering a drop-in part.
What do people say about the push-pull hitch on this specific first-generation machine?
Straight talk: detailed hitch-specific chatter for the original D343/D333 637 by itself is thin. Most of what gets discussed under the "637" name these days is about the tandem/twin-power scrapers that came later, and their hitch fixes don't automatically carry over to a Series I machine. What does hold true across that whole era of push-pull Cat scrapers is that the hitch bail's pins and bushings take a beating working in rock or abrasive dirt and need regular play checks, and any cushion-type hitch leans on hydraulics that age just as poorly as the rest of a machine this old. If you own one of these, verify against your own literature or a restorer who actually knows the Series I rather than assuming a later model's hitch writeup applies. Given what a hitch failure means mid-push-pull, have a qualified restorer verify pin, bushing and cushion condition before you put it back to work.
What kind of tire and chassis wear should I expect on a machine this old?
Tires are already one of the bigger costs on any push-pull scraper working in rock or abrasive dirt, wear is fast and a full set isn't cheap even on a modern machine. On a machine this age the bigger problem for a lot of owners isn't wear from work, it's just age: bias-ply carcasses that have sat for decades get dry rot and sidewall cracking whether they've been run hard or not, and hunting down correct vintage sizing that isn't a modern radial substitute takes some digging. Cold, stiff tires on older scrapers also get blamed for a rough, bouncy ride, so don't judge overall chassis condition off a machine you haven't warmed up and run a while first.
What are the common electrical gremlins on a 1970s-era 637?
A machine this old is going to show age-related charging and starting problems before anything major mechanical acts up: corroded battery terminals and ground straps, tired voltage regulators, and cracked or brittle wiring insulation are the first things to run down if it cranks slow or the gauges act erratic. These early 637s also came with an ether-injection cold-start aid alongside the electric start, and on a machine this age that canister, its lines and the injection valve need to be checked for condition rather than assumed good, old ether hardware that's leaking or sticking open is a real fire risk. Have your dealer or a qualified restorer verify the starting aid and charging system before you rely on either.
How hard is it to source parts and support a rebuild on an original 637 today?
Being a low-production, long-obsolete machine, the original 637 is a tougher parts hunt than the later D, E and G-series scrapers Cat sold in real volume for years afterward. Common wear items overlap with other D343/D333-powered machines from the same era, loaders, graders, other scrapers, so the engine side isn't hopeless, but sheet metal, glass, hydraulic-specific pieces and anything unique to this particular tractor-scraper pairing gets scarce fast. It's also common knowledge among the old-iron crowd that these engines got swapped between compatible Cat machines over the decades, so when you're sourcing a rebuild kit or fuel system parts, match them to what's actually installed on your machine rather than just trusting the model number.
What should I check before buying a used original 637?
Because these are old enough that engines and components have been shuffled around over the decades, start by confirming the tractor engine, scraper engine and chassis serial/data plate all actually line up with what the machine is supposed to be, don't take a seller's word for "original 637" at face value. Beyond that it's the same fundamentals as inspecting any old twin-engine scraper: run both engines and watch for smoke, leaks and fuel-diluted oil if it's sat a while; check the hitch bail, pins and bushings for slop; judge tires on age cracking as much as tread wear; and go over the bowl, apron and ejector hydraulics for cylinder drift and leaking seals. Given the age and rarity, get a qualified restorer or a dealer familiar with vintage Cat iron to look it over, not a shop that's only ever touched the modern C18-engined 637.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Serial-range & configuration variants
This page covers the Caterpillar 637. Related factory variants of the same model family:
637
Need a specific 637 part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.