Caterpillarwheel tractor-scraperwheel tractor
Caterpillar 641
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar 641 is a single-engine wheel tractor-scraper, the large-capacity middle ground of Cat's 600-series scraper family launched in 1962 alongside the 630A, 631A, 632, 650, 651, 657, 660, and 666. Every 641 and 641B ran the Caterpillar D346, a 60-degree V8 turbocharged diesel of 19.5 L (1,190 cu in): 450 hp at introduction in 1962, raised to roughly 500 hp by the mid-1960s, and uprated again to 550 hp in the 641B from 1969. Operating weight runs roughly 110,000-119,000 lb (50,000-54,000 kg) depending on series and configuration, with a bowl rated at 28 cu yd struck and 38 cu yd heaped. The original 641 used a nine-speed powershift planetary transmission; the 641B switched to an eight-speed semi-automatic unit. Both series controlled the bowl, apron, and ejector entirely by hydraulics, a break from Cat's earlier cable-operated scrapers, and both carried air-operated shoe brakes backed by a factory-standard hydraulic retarder. Caterpillar offered the line only as an open-bowl configuration; no elevating or push-pull variant reached production. The 641 ran from 1962 to 1978.
The 641B, introduced in 1969, is the one major generational change: the same D346 engine family uprated to 550 hp, a new eight-speed semi-automatic transmission that needed less operator input than the original nine-speed powershift, and the same hydraulic bowl/apron/ejector architecture and brake/retarder layout carried over unchanged. Caterpillar discontinued the 641 in 1978 without a direct one-for-one successor in that capacity class; the larger 651 and 657 lines continued in the catalog while the 641's specific slot in the range closed out. That makes surviving 641 and 641B units a collector- and vintage-fleet proposition today: factory documentation predates Cat's digital SEBU-format OMM, so service information survives only in print shop and parts manuals, and drivetrain parts such as D346 engine components, powershift clutch packs, and final drive gearing are scarce enough that sourcing, not machine condition, is often the limiting factor in keeping a 641 working.
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 641 specifications
Engine
| Engine model | Cat D346, 60-degree V8 turbocharged diesel |
| Gross power (early production) | 336 kW (450 hp) @ 1900 rpm at initial 1962 launch |
| Gross power (mid-production, from 1965) | 373 kW (500 hp) flywheel @ 1900 rpm, same D346 block |
| Gross power (641B update series) | 410 kW (550 hp) @ 1900 rpm; 641B pairs the D346 with a new 8-speed semi-automatic transmission in place of the original 9-speed powershift |
| Displacement | 19.5 L (1190 cu in) |
| Cylinders | 8 (V8) |
| Transmission (original 641) | 9-speed full powershift, barrel-type planetary, with downshift inhibitor |
| Emissions tier | Not applicable; machine produced 1962-1978, predates emissions-tier regulation |
Weights
| Operating weight, empty (original 641) | approx. 43 t (47.4 tons) per period technical literature; treat as approximate, single-sourced figure |
| Operating weight, loaded (original 641) | approx. 81 t (89 tons) |
| Operating weight, empty (641B update series) | 53,978 kg (119,000 lb); reflects the re-engined, heavier-transmission configuration, not the original 641 |
| Ground pressure | Not documented in available sources |
Dimensions
| Overall length (original 641) | 14.73 m (48 ft 4 in) |
| Overall width (original 641) | 4.11 m (13 ft 6 in) |
| Overall height (original 641) | 3.99 m (13 ft 1 in) |
| Overall length (641B) | approx. 14.97-14.99 m (49 ft 1-2 in) |
| Overall width (641B) | 4.05-4.06 m (13 ft 4 in) |
| Overall height (641B) | 4.36-4.37 m (14 ft 3-4 in) |
| Wheelbase (641B) | 9.45 m (31 ft); not separately documented for the original 641 |
| Turning circle (original 641) | 13.59 m (44 ft 7 in) |
| Tire size (original 641) | 33.5x39, standard fitment |
| Tire size (641B) | 37.5x39, 36-ply rating |
| Ground clearance | Not documented in available sources |
Performance
| Top travel speed (original 641) | approx. 48 km/h (30 mph), top transmission range |
| Top travel speed (641B) | 51.5 km/h (32 mph) |
| Bowl capacity, struck | 21.4 m3 (28 cu yd) |
| Bowl capacity, heaped | 29.05 m3 (38 cu yd) |
| Width of cut | 3.47 m (11.4 ft); figure carried from 641B factory data, bowl geometry unchanged across the series |
| Maximum depth of cut | 40.6 cm (16 in); figure carried from 641B factory data |
| Braking system | Air-actuated shoe-type brakes, factory hydraulic retarder standard to extend brake-shoe life |
| Steering system | Full-hydraulic, twin double-acting cylinders on torque-multiplying linkages at the gooseneck hitch, roughly 90-degree articulation range |
| Gradeability / drawbar pull | Not documented in available sources |
Service capacities (summary)
| Fuel tank | approx. 1060 L (280 US gal); factory figure for the 641B update series, not independently confirmed for the original 641 |
| Hydraulic system | Not documented in available sources |
| Engine oil | Not documented in available sources |
| Cooling system | Not documented in available sources |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
641 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) - D346 V8 turbocharged diesel | Not documented in any source accessible for this pre-1978 machine. Crankcase volume for the D346 V8 varies by oil pan and filter configuration fitted at the factory. Confirm against the machine's data plate and the original printed OMM for the serial prefix on hand. | Engine takes a heavy-duty diesel engine oil meeting the API/Caterpillar service classification current when the machine was built. No specific branded product name is confirmed for the 641 in accessible sources; period practice on this class of machine called for a multigrade oil selected by ambient temperature, warmer grades in hot climates and lighter winter grades in cold starts. Verify the exact grade call-out against the original OMM or a dealer parts/service archive. |
| Cooling system | Not documented in accessible sources for this model. | Water/glycol antifreeze-coolant mix appropriate to climate, per standard Caterpillar cooling-system practice of the era. Specific product name not confirmed for the 641; verify against the original OMM. |
| Fuel tank | Not documented in accessible sources for this model. Later, more powerful 641B tractor-scrapers in the same family are commonly cited around 1,060 liters (280 US gal), but this figure is not confirmed as applying to the earlier 641 and should not be treated as a match. | Diesel fuel per Caterpillar's standard specification for turbocharged diesel engines of the period. |
| Transmission - nine-speed powershift planetary (with retarder) | Not documented in accessible sources for this model. | Powershift transmission and retarder oil per Caterpillar's transmission/drive-train oil specification of the era. Specific branded product name not confirmed for the 641; verify against the original OMM. |
| Differential / bevel gear case | Not documented in accessible sources for this model. | Gear oil per Caterpillar's final-drive and axle oil specification. Specific branded product name not confirmed for the 641; verify against the original OMM. |
| Final drives (each side) | Not documented in accessible sources for this model. | Gear oil per Caterpillar's final-drive and axle oil specification, same family as the differential fill. Specific branded product name not confirmed for the 641; verify against the original OMM. |
| Hydraulic system and tank (scraper bowl/apron/ejector, steering) | Not documented in accessible sources for this model. | Hydraulic oil per Caterpillar's hydraulic system oil specification of the era. Specific branded product name not confirmed for the 641; verify against the original OMM. On tractor-scrapers of this vintage the hydraulic and power-train oil circuits are sometimes shared rather than separate - confirm circuit layout against the OMM before mixing fluids. |
| Grease points (chassis, hitch, cylinder pins) | Spec only - not a refill volume. | Multipurpose chassis grease per Caterpillar's standard grease specification for construction equipment of the era. Specific branded product name not confirmed for the 641. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 641 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 6,000 h |
|
Servicing the 641 beyond the schedule
Predictive Maintenance & Fluid Analysis
Run scheduled oil sampling on the D346 V8 turbo diesel to catch injection pump and turbocharger wear before failure; these engines predate onboard diagnostics. Trend powershift transmission oil (9-speed on the 641, 8-speed semi-automatic on the 641B) for clutch pack wear. Sample final drive oil in both wheels for planetary gear and bearing condition, and analyze hydraulic tank fluid from the bowl/apron/ejector circuit for cylinder and pump wear metals. Test coolant SCA level regularly to protect the cast-iron V8 block from cavitation and corrosion.
Corrective & Common Repairs
Expect apron and ejector hydraulic cylinder reseals and hose replacement as the primary wear item, since the 641 controls the bowl, apron, and ejector entirely by hydraulics rather than cable. Turbocharger shaft play and housing oil leaks on the D346 are common corrective jobs. Air-operated brake shoes and drums need periodic relining, and the hydraulic retarder should be checked alongside them. Inspect king pins, tie rods, and U-joints on the articulated hitch and driveline, and replace bowl cutting edges and end bits as abrasive wear progresses.
Overhaul & Rebuild Points
At major hour milestones, overhaul the D346 injection pump and turbocharger together since both wear from the same fuel and boost trends. Rebuild the powershift transmission's clutch packs and valve body (9-speed on the 641, 8-speed semi-automatic on the 641B) rather than running to failure. Wheel final drive planetary gears and bearings warrant full teardown inspection at rebuild intervals. Bowl floor and side sheets wear through from abrasive material and need replacement before frame damage occurs; inspect the gooseneck and hitch structure for fatigue cracking given the machine's age.
Seasonal & Environment Servicing
Cold-start the D346 V8 with ether or intake-manifold heat aids below freezing, and switch to cold-weather-viscosity engine and hydraulic oil in the bowl/apron/ejector circuit before winter. Maintain full antifreeze concentration; the cast-iron V8 has no digital overheat warning to flag a weak mix. Drain the air brake reservoir more often in humid or wet climates to stop frozen or corroded valves. Many surviving 641 and 641B units still work in Europe on wet sites, so check tire/rim seating and final drive seals where standing water or mud is constant.
641 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| LOW OIL PRESSURE (red warning lamp + gauge) | Engine lubrication pressure has dropped below the safe operating range for the D346 V8. | Low oil level, worn oil pump, clogged suction screen, or a failing pressure sender. | Stop engine immediately, check oil level and condition, inspect pump and sender before restart. |
| COOLANT TEMPERATURE (gauge red zone) | Engine jacket water temperature is above the normal operating band. | Low coolant, blocked radiator core, slipping or failed fan drive, or a stuck thermostat. | Reduce load, idle to cool, check coolant level and radiator/fan condition; do not add cold coolant to a hot engine. |
| CHARGING SYSTEM (ammeter discharge / charge lamp) | Generator or alternator output is not maintaining battery charge. | Worn or broken drive belt, failed regulator, or generator/alternator fault. | Check belt tension and condition, then test regulator and charging output with the machine stopped. |
| LOW AIR PRESSURE (brake system buzzer/lamp) | Air reservoir pressure for the air-actuated service brakes has fallen below the safe minimum. | Air compressor not building pressure, leaking lines or fittings, or a faulty governor. | Do not move the machine until pressure recovers; inspect compressor, lines, and governor for leaks or failure. |
| TORQUE CONVERTER / TRANSMISSION OIL TEMPERATURE (gauge high reading) | Power-shift transmission or converter oil is running hotter than the normal operating range. | Low transmission oil, clogged oil cooler, or prolonged high-load/low-gear operation (e.g. stall conditions). | Reduce load or shift to a gear that lowers converter slip, check oil level and cooler flow, let temperature normalize before continuing. |
| TACHOMETER TELL-TALE (engine overspeed indicator) | Engine rpm has reached or exceeded the governed limit, tripping the tell-tale on the rev counter. | Downshift at too high a road speed, or a failure in the downshift-inhibitor linkage meant to prevent this. | Ease off the throttle/downshift immediately, then have the downshift inhibitor and governor linkage checked. |
| AIR CLEANER SERVICE INDICATOR (restriction gauge/flag) | Intake air filter restriction has reached the point where the element needs servicing. | Dust/dirt loading of the air cleaner element in typical earthmoving conditions. | Service or replace the air cleaner element per the interval in the service manual; reset the indicator after cleaning. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
641 attachments & work tools
Open-bowl scraper (standard configuration)
The 641 was built and sold only as a single-engine, open-bowl wheel tractor-scraper — no elevating or twin-power variant is documented for this specific model. Rated bowl capacity is about 21.4 m3 struck / 29 m3 heaped (28 yd3 struck / 38 yd3 heaped), with an operating width around 4.1 m (13 ft 4 in), varies by configuration/series.
Extreme-service bowl option
A heavier-duty bowl option, built with additional high-analysis steel for abrasive or rocky loading conditions, was introduced in the early-to-mid 1960s. It adds roughly 1,800 kg (about 4,000 lb) to machine weight versus the standard bowl.
Bowl, apron and ejector hydraulics
Bowl, apron and ejector are all hydraulically actuated (no cable control): twin double-acting lift cylinders raise/lower the bowl with check-valve hold and a quick-drop function for tough loading, a double-acting cylinder in the gooseneck swings the apron independent of load weight, and a single double-acting cylinder drives the ejector, which carries a gate-type spillguard. A synchronization switch to coordinate apron and bowl movement was optional early on and later became standard.
Cushion hitch (gooseneck shock absorber)
An optional gooseneck-mounted cushion hitch, using a hydraulic ram and nitrogen accumulator to damp shock loads between tractor and bowl during travel, became available for the 641 line from the late 1960s. It remained an option through the early 641B years and was not made standard fit until the mid-1970s.
Steering and hitch linkage
Steering runs through two double-acting hydraulic cylinders on torque-multiplying linkage mounted high on the gooseneck, giving roughly 90 degrees of steering range; this is part of the base tractor-to-bowl hitch, not a separate work tool.
Tire options
Standard fitment was 33.5x39 tires; other sizes were available as factory options for different ground and load conditions, varies by configuration/series.
Cab and operator enclosure
An enclosed, fully heated operator cab was offered as a factory option for cold-climate work, in addition to the standard open operator station.
Differential lock
A differential lock was offered as an option on later production, improving traction in soft or uneven material; not confirmed as available on the earliest 641 production.
Braking / retarder
Air-operated shoe-type service brakes were supplemented by a factory-fitted hydraulic retarder to reduce brake shoe wear on grade work; this was standard, not an add-on kit.
All 641 assemblies by section
Every catalogued assembly group for the Caterpillar 641. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Attachments
7d2425 Alternator Arrangement--12 Volt, 75 Ampere
| 4D***00 | Wiring Group | 1 |
| 4D***48 | Clip-Harness Assembly To Engine | 1 |
| 5D***05 | Harness; -- Dash Terminal Strips And Dimmer Switch To Terminal Strip On Radiator Fan Shroud | 1 |
4d6360 Alternator Assembly--12 Volt, 55 Ampere
| 4B***20 | Clip; - For Orange Wire To L.H. Side Of Alternator Fan Shroud | 1 |
| 4D***60 | Alternator Arrangement | 1 |
| 4D***65 | Wire Assembly; -- Alternator Ground | 1 |
1s2585 Alternator Assembly--12 Volt, 55 Ampere
| 1S***85 | Alternator Assembly | 1 |
1s2584 Alternator Assembly
| 1S***84 | Alternator Assembly | 1 |
9s3193 Alternator Group--24 Volt, 50 Ampere
| 9S***93 | Alternator Group | 1 |
9s3165 Alternator Group--12 Volt, 75 Ampere
| 9S***65 | Alternator Group | 1 |
7m9606 Alternator Group--24 Volt, 40 Ampere
| 7M***06 | Alternator Group | 1 |
7m9605 Alternator Group--12 Volt, 55 Ampere
| 7M***05 | Alternator Group | 1 |
5s6698 Alternator Assembly--12 Volt, 75 Ampere--Part 1 Of 2--Type 2
| 5S***98 | Alternator Group-Charging; Alternator Group | 1 |
5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 2 Of 2--Type 2
| 5S***88 | Alternator Group-Charging | 1 |
5s6698 Alternator Assembly--12 Volt--75 Ampere--Part 2 Of 2--Type 3
| 5S***98 | Alternator Group-Charging; Alternator Group | 1 |
5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 1 Of 2--Type 1
| 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 |
5s6698 Alternator Assembly--12 Volt, 75 Ampere--Part 2 Of 2--Type 1
| 5S***98 | Alternator Group-Charging; Alternator Group | 1 |
5s6698 Alternator Assembly--12 Volt, 75 Ampere--Part 2 Of 2--Type 2
| 5S***98 | Alternator Group-Charging; Alternator Group | 1 |
5s6698 Alternator Assembly--12 Volt, 75 Ampere--Part 1 Of 2--Type 3
| 5S***98 | Alternator Group-Charging; Alternator Group | 1 |
5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 1 Of 2--Type 2
| 5S***88 | Alternator Group-Charging | 1 |
5s6698 Alternator Assembly--12 Volt, 75 Ampere--Part 1 Of 2--Type 1
| 5S***98 | Alternator Group-Charging; Alternator Group | 1 |
4d1640 Battery, Wiring And Lighting Group--24 Volt--Part 1 Of 4-Type 1
| 4D***40 | Battery Wiring And Lighting System | 1 |
4d1640 Battery, Wiring And Lighting Group--24 Volt--Part 2 Of 4 - Type 1
| 4D***40 | Battery Wiring And Lighting System | 1 |
4d1640 Battery, Wiring And Lighting Group--24 Volt--Part 3 Of 4 - Type 1
| 4D***40 | Battery Wiring And Lighting System | 1 |
4d1640 Battery, Wiring And Lighting Group--24 Volt--Part 1 Of 4--Type 2
| 4D***40 | Battery Wiring And Lighting System | 1 |
4d1640 Battery, Wiring And Lighting Group--24 Volt--Part 3 Of 4--Type 2
| 4D***40 | Battery Wiring And Lighting System | 1 |
4d1640 Battery, Wiring And Lighting Group--24 Volt--Part 4 Of 4 - Type 1
| 4D***40 | Battery Wiring And Lighting System | 1 |
4d1640 Battery, Wiring And Lighting Group--24 Volt--Part 2 Of 4--Type 2
| 4D***40 | Battery Wiring And Lighting System | 1 |
4d1640 Battery, Wiring And Lighting Group--24 Volt--Part 4 Of 4--Type 2
| 4D***40 | Battery Wiring And Lighting System | 1 |
6d6365 Brake Shield Group
| 6D***65 | Brake Shield Group | 1 |
5j5272 Brake Chamber Assembly
| 5J***72 | Chamber As-Brake | 1 |
2s6096 Protection Cover Group--Radiator Cap
| 2S***96 | Cover Group-Protection; Protection Cover Group-- Radiator Cap | 1 |
2s3025 Protection Cover Group--Oil Filler Cap
| 2S***25 | Cover Group-Protection; Protection Cover Group | 1 |
5d1900 Protection Cover Group--Hydraulic Tank Cap
| 5D***00 | Cover Group-Protection; Protection Cover Group-- Hydraulic Tank Cap | 1 |
Cylinder Head Assembly--Right Hand-Part 1 Of 2
Cylinder Head Assembly--Left Hand-Part 2 Of 2
7m3721 Direct Electric Starting Arrangement--24 Volt
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 2 |
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 1 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
9f740 Discharger
| 9F***40 | Discharger Group | 1 |
6d3783 Valve Assembly
| 6D***83 | Double Check Valve Assembly; --Synchro --To Nipple | 1 |
9s8813 Downshift Blocker Group
| 9S***13 | Downshift Blocker Group | 1 |
7m2134 Electric Starter Group--24 Volt
| 7M***34 | Electric Starter Group | 1 |
4m4615 Electric Starting Motor Assembly--24 Volt--Part 1 Of 2 - Type 1
| 4M***15 | Electric Starting Motor Assembly | 1 |
4m4615 Electric Starting Motor Assembly--24 Volt--Part 2 Of 2 - Type 1
| 4M***15 | Electric Starting Motor Assembly | 1 |
4m4615 Electric Starting Motor Assembly--24 Volt--Part 2 Of 2--Type 2
| 4M***15 | Electric Starting Motor Assembly | 1 |
4m4615 Electric Starting Motor Assembly--24 Volt--Part 1 Of 2--Type 2
| 4M***15 | Electric Starting Motor Assembly | 1 |
5d4555 Emergency Relay Valve Assembly
| 5D***55 | Emergency Relay Valve Assembly | 1 |
6d7090 Ether Starting Aid Group
| 6D***90 | Ether Starting Aid Group | 1 |
7d3340 Fast Fill Fuel Adapter Group
| 7D***40 | Fast Fill Fuel Adapter Group | 1 |
Flywheel (4m1085 N/S)
| 4M***85 | Flywheel | 1 |
6d2590 Diesel Fuel System--Rapid Filling
| 6D***90 | Fuel System Group | 1 |
7s4273 Glow Plug And Wiring Group--24 Volt
| 7S***73 | Glow Plug And Wiring Group | 1 |
8f9866 Grease Gun
| 8F***66 | Grease Gun As | 1 |
8m9858 Tool Group
| 8M***58 | Hand Tool Group | 1 |
Hitch And Steering--Top View--Part 2 Of 2
Hitch And Steering--Side View--Part 1 Of 2
4j7713 Hitch And Steering Arrangement--Factory Installation
| 2J***69 | Hydraulic Cylinder Group | 2 |
| 4J***13 | Hitch And Steering Arrangement | 1 |
6j4365 Hitch And Steering Arrangement
| 5J***49 | Steering Cylinder Group | 2 |
| 5J***06 | Servo-Master Steering Cylinder Group | 1 |
| 5J***57 | Lines Group-Steering | 1 |
6j2264 Hitch And Steering Group--Part 1 Of 2--Type 1
| 6J***64 | Hitch And Steering Group | 1 |
6j2264 Hitch And Steering Group--Part 2 Of 2--Type 1
| 6J***64 | Hitch And Steering Group | 1 |
6j2264 Hitch And Steering Group--Part 2 Of 2--Type 2
| 6J***64 | Hitch And Steering Group | 1 |
6j2264 Hitch And Steering Group--Part 1 Of 2--Type 3
| 6J***64 | Hitch And Steering Group | 1 |
6j2264 Hitch And Steering Group--Part 2 Of 2--Type 3
| 6J***64 | Hitch And Steering Group | 1 |
6j2264 Hitch And Steering Group--Part 1 Of 2--Type 2
| 6J***64 | Hitch And Steering Group | 1 |
8j9204 Hitch Reinforcement Group--Field Installation
| 7D***98 | Boss | 4 |
| 8J***04 | Hitch Reinforcement Group | 1 |
6d6470 Hitch, Steering And Hydraulic Arrangement
| 6D***65 | Miscellaneous Parts Group | 1 |
| 6D***40 | Scraper Hitch Lines Group | 1 |
| 6D***70 | Hitch, Steering And Hydraulic Arrangement | 1 |
6d4750 Hitch, Steering And Hydraulic Arrangement
| 6D***65 | Miscellaneous Parts Group | 1 |
| 6D***40 | Scraper Hitch Lines Group | 1 |
| 6D***50 | Hitch, Steering And Hydraulic Arrangement | 1 |
4d5910 Hood Side Door Group--Right Hand
| 4D***10 | Hood Side Door Group | 1 |
2j9469 Hydraulic Cylinder Group--7.25" Bore X 85.75" Stroke--2 Required
| 2J***69 | Hydraulic Cylinder Group | 1 |
Hydraulic Steering Lines--Part 2 Of 2
Hydraulic Steering Lines--Part 1 Of 2
3j9687 Hydraulic Swivel Joint Group
| 3J***87 | Hydraulic Swivel Joint Group | 1 |
5d793 Indicator Lamp Assembly
| 5D***93 | Indicator Lamp Assembly | 1 |
4d5477 Instrument Panel Protection Group
| 4D***77 | Instrument Panel Protection Group | 1 |
6d4205 Lamp Assembly
| 6D***05 | Lamp Assembly | 1 |
1m1882 Flood Lamp Assembly--24 Volt--Type 1
| 1M***82 | Lamp Group | 1 |
1m3379 Head Lamp Assembly--24 Volt--Type 1
| 1M***79 | Lamp Group | 1 |
1m3387 Dash Lamp Assembly
| 1M***87 | Lamp Group | 1 |
1m3379 Head Lamp Assembly--24 Volt--Type 2
| 1M***79 | Lamp Group | 1 |
1m1882 Flood Lamp Assembly--24 Volt--Type 2
| 1M***82 | Lamp Group | 1 |
4s7602 Light Signal Receiver Group--12 Volt
| 4S***02 | Light Signal Receiver Group | 1 |
4s7967 Light Signal Receiver Group--24 Volt
| 4S***67 | Light Signal Receiver Group | 1 |
6d4365 Miscellaneous Parts Group
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 0T***18 | Bolt Strap To Front Cover | 2 |
| 3B***06 | Washer,Lock; Flange,Elbow,Clamp Assembly,Tube To Pump,Tube Assembly To Screen,Clip Mounting,And Tube Assembly To Transmission | 4 |
8s6713 Muffler Group
| 8S***13 | Muffler Group | 1 |
Name Plates And Transfers
| 2D***12 | Plate- Seat Adjustment Instructions | 1 |
| 2M***31 | Plate; Serial Number On R.H. Side Of Cylinder Block And R.H. Side Of Loader Frame | 2 |
| 2S***68 | Plate--Warning Shifting Instructions | 1 |
6d6620 Parking And Emergency Brake Control Arrangement
| 6D***30 | Parking And Emergency Brake Control Group | 1 |
| 6D***40 | Parking And Emergency Brake Control Group | 1 |
| 6D***20 | Parking And Emergency Brake Control Arrangement | 1 |
6d6630 Parking And Emergency Brake Control Arrangement
| 6D***40 | Parking And Emergency Brake Control Group | 1 |
| 6D***60 | Parking And Emergency Brake Control Group | 1 |
| 6D***30 | Parking And Emergency Brake Control Arrangement | 1 |
6d6630 Control Arrangement
| 6D***30 | Parking And Emergency Brake Control Arrangement | 1 |
6d6620 Control Arrangement
| 6D***20 | Parking And Emergency Brake Control Arrangement | 1 |
6d4240 Parking And Emergency Brake Control Group--Part 3 Of 3
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 1D***17 | Nut-Plate And Angle Assembly To Hydraulic And Fuel Tanks; Nut Plate And Angle Assembly To Hydraulic And Fuel Tanks | 4 |
| 2B***57 | Plug (.375" Pipe Thread) | 2 |
6d4230 Parking And Emergency Brake Control Group
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 6 |
| 1D***06 | Nut 13.89 mm (.546 In.) | 1 |
| 1H***06 | Screw-Purge (1/2-20x1.625in); (1/2-20x1.625-In) | 1 |
6d4240 Parking And Emergency Brake Control Group--Part 2 Of 3
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 2 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 1 |
| 0S***15 | Bolt 19 mm (.75 In.) Long Return Air Console To Enclosed Rops | 2 |
6d4460 Parking And Emergency Brake Control Group
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 4 |
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 1D***06 | Nut 13.89 mm (.546 In.) | 1 |
6d4240 Parking And Emergency Brake Control Group--Part 1 Of 3
| 1D***16 | Nut,Plain,Hexagon Clip Uoc:Bsv,Bsx | 2 |
| 1S***01 | Union --Inversion Valve To Scraper Supply Hose; -- Inversion Valve To Scraper Supply Hose | 1 |
| 2B***95 | Cap Screw--Tube Assembly To Air Inlet Pipe | 2 |
6d7060 Parking Brake Group--Part 2 Of 2--Type 2
| 6D***60 | Parking Brake Group | 1 |
6d7060 Parking Brake Group--Part 2 Of 2 - Type 1
| 6D***60 | Parking Brake Group | 1 |
6d7060 Parking Brake Group--Part 1 Of 2--Type 2
| 6D***60 | Parking Brake Group | 1 |
6d7060 Parking Brake Group--Part 1 Of 2--Type 1
| 6D***60 | Parking Brake Group | 1 |
2s2787 Protection Cap Group--Fuel Tank Cap
| 2S***87 | Protection Cap Group | 1 |
5d1920 Protection Cover Group--Fuel Tank Cap
| 5D***20 | Protection Cover Group-Fuel Tank Cap; Protection Cover Group | 1 |
8s5101 Radiator Core Protection Grid Group
| 8S***01 | Radiator Core Protection Grid Group | 1 |
2d284 Rear Flood Light Group--24 Volt
| 2D***84 | Rear Flood Light Group | 1 |
3d9344 Rear Flood Light Group--12 Volt
| 3D***44 | Rear Flood Light Group | 1 |
4f6941 Release Valve Assembly
| 4F***41 | Release Valve Assembly | 1 |
6d2903 Rotochamber Assembly
| 6D***03 | Rotochamber Assembly | 1 |
5d3306 Rotochamber Assembly
| 5D***06 | Rotochamber Assembly | 1 |
6d4740 Scraper Hitch Lines Group--Part 1 Of 2--Type 2
| 6D***40 | Scraper Hitch Lines Group | 1 |
6d4740 Scraper Hitch Lines Group--Part 2 Of 2--Type 2
| 6D***40 | Scraper Hitch Lines Group | 1 |
6d4740 Scraper Hitch Lines Group--Part 1 Of 2--Type 3
| 6D***40 | Scraper Hitch Lines Group | 1 |
6d4740 Scraper Hitch Lines Group--Part 2 Of 2--Type 3
| 6D***40 | Scraper Hitch Lines Group | 1 |
6d4740 Scraper Hitch Lines Group--Part 2 Of 2--Type 1
| 6D***40 | Scraper Hitch Lines Group | 1 |
6d4740 Scraper Hitch Lines Group--Part 1 Of 2--Type 1
| 6D***40 | Scraper Hitch Lines Group | 1 |
7d6345 Brake Shield Group
| 7D***45 | Shield Group-Brake | 1 |
7j124 Single Lever Bowl Control Group
| 7J***24 | Single Lever Bowl Control Group | 1 |
6n5123 Solenoid Switch Assembly--24 Volt
| 6N***23 | Switch As-Solenoid | 1 |
4m1812 Solenoid Switch Assembly
| 4M***12 | Switch As-Solenoid | 1 |
9s7978 Tool Group
| 9S***78 | Tool Group-Hand | 1 |
Tools (8m9866 N/S)
6d3782 Emergency Control Valve Assembly
| 6D***82 | Valve As; -- Emergency Control | 1 |
2r618 Double Check Valve Assembly
| 2R***18 | Valve As-Check | 1 |
4d487 Valve Assembly
| 4D***87 | Valve As-Check; -Air Supply-Primary Air Tank-Service Brake Control | 1 |
4j8500 Control Valve Assembly
| 4J***00 | Valve As-Control | 1 |
6d3781 Double Check Valve Group--Type 2
| 6D***81 | Valve Group-Check; -Service Brake Diverter-Retarder Control | 1 |
6d3781 Double Check Valve Group--Type 1
| 6D***81 | Valve Group-Check; -Service Brake Diverter-Retarder Control | 1 |
2r619 Double Check Valve Assembly
| 2R***19 | Valve Group-Check; -Air System-Parking Brake-Scraper Brake-Service Brake Control | 1 |
5d370 Wheel Group
| 5D***70 | Wheel Group | 1 |
3d9330 Windshield Wiper Group--24 Volt
| 3D***30 | Windshield Wiper Group | 1 |
6d9750 Windhsield Wiper Group--24 Volt--Type 2
| 6D***50 | Windshield Wiper Group | 1 |
3d9340 Windshield Wiper Group--12 Volt
| 3D***40 | Windshield Wiper Group | 1 |
6d9740 Windshield Wiper Group--12 Volt
| 6D***40 | Windshield Wiper Group | 1 |
6d9750 Windshield Wiper Group--24 Volt-Type 1
| 6D***50 | Windshield Wiper Group | 1 |
Diesel Engine
Aftercooler
Air Cleaner (4d1660 N/S)
| 4D***60 | Air Cleaner | 1 |
Air Compressor
7s8336 Air Compressor Assembly
| 7S***36 | Air Compressor Assembly | 1 |
Air Compressor Drive
7m914 Air Filter Service Indicator Group
| 7M***14 | Air Filter Service Indicator Group | 1 |
Breather, Oil Filler And Fumes Disposal
Camshaft
Camshaft Drive--Top View
Connecting Rod And Piston--8 Required
4m2708 Connecting Rod And Piston Group--8 Required--Type 2
| 4M***08 | Connecting Rod And Piston Group | 1 |
Crankcase And Lines Guard
4m2709 Crankshaft And Damper Group
| 4M***09 | Crankshaft And Damper Group | 1 |
Crankshaft Bearing Replacement
Crankshaft Bearing Replacement Groups
Cylinder Block And Covers--End View - Part 2 Of 2
Cylinder Block And Covers--Side View-Part 1 Of 2
3s9720 Cylinder Block Assembly
| 3S***20 | Cylinder Block Assembly | 1 |
Cylinder Head And Valve Mechanism--Left Hand--Front View-Part 2 Of 2
Cylinder Head And Valve Mechanism--Right Hand--Front View - Part 1 Of 2
Engine Support
Exhaust By-Pass
Fan And Shroud (2s3226 N/S)
| 2S***26 | Fan And Shroud | 1 |
Fan And Shroud
3s4132 Fan Assembly--Reversible Blade
| 3S***32 | Fan Assembly | 1 |
Fan Belt Tightener
8h7204 Fuel Filter Group
| 8H***04 | Filter Group-Fuel | 1 |
Flywheel
Fuel Filter
Fuel Injection Valves And Lines
Fuel Priming Pump
Fuel Pump And Governor Drive
Fuel Pump Housing And Rack Limiter (7m1068 N/S)
| 7M***68 | Fuel Pump Housing And Rack Limiter | 1 |
Fuel System (4d2280 N/S)
| 4D***80 | Fuel System | 1 |
Fuel Transfer Pump
5s4234 Fuel Transfer Pump Group
| 5S***34 | Fuel Transfer Pump Group | 1 |
Gasket Kits
| 3P***34 | Power Train Oil System | 0 |
| 3P***13 | Transmission Overhaul | 0 |
| 3P***14 | Torque Converter Overhaul | 0 |
Gauges--Part 1 Of 2
Gauges--Part 2 Of 2
Governor--End View - Part 2 Of 2
Governor--Side View - Part 1 Of 2
Governor Control
Governor Torque Spring
Manifolds
Oil Filter
Oil Lines--Part 1 Of 2
Oil Lines--Part 2 Of 2
2s1826 Oil Pump Assembly
| 2S***26 | Oil Pump Assembly | 1 |
2s5651 Precleaner Assembly
| 2S***51 | Precleaner As; -Air Cleaner | 1 |
3s859 Pressure Ratio Regulator Assembly
| 3S***59 | Pressure Ratio Regulator Assembly | 1 |
8m1601 Rack Limiter Group
| 8M***01 | Rack Limiter Group | 1 |
Radiator (2s3227 N/S)--Rear View - Part 1 Of 2
| 2S***27 | Radiator | 1 |
Radiator (2s3227 N/S)--Side View - Part 2 Of 2
| 2S***27 | Radiator | 1 |
Rear Power Take-Off Drive
3s3582 Service Meter And Tachometer Drive Group
| 3S***82 | Service Meter And Tachometer Drive Group | 1 |
Torque Converter And Engine Oil Cooler
Transmission And Steering Pump Drive
2s879 Turbocharger Assembly
| 2S***79 | Turbocharger Assembly | 1 |
Water Lines
Water Pump Belt Tightener (2s6074 N/S)
| 2S***74 | Water Pump Belt Tightener | 1 |
7m1080 Water Pump Group
| 7M***80 | Water Pump Group | 1 |
Starting System
3s1766 Air Cleaner And Exhaust System Group
| 3S***66 | Air Cleaner & Exhaust Group-Stg | 1 |
4d1890 Battery, Wiring And Lighting Group--12 Volt--Part 2 Of 4--As Viewed From Operator'S Seat
| 4D***90 | Battery Wiring And Lighting Group | 1 |
4d1890 Battery, Wiring And Lighting Group--12 Volt--Part 1 Of 4--As Viewed From Operator'S Seat
| 4D***90 | Battery Wiring And Lighting Group | 1 |
4d1890 Battery, Wiring And Lighting Group--12 Volt--Part 4 Of 4--As Viewed From Operator'S Seat
| 4D***90 | Battery Wiring And Lighting Group | 1 |
4d1890 Battery, Wiring And Lighting Group--12 Volt--Part 3 Of 4--As Viewed From Right Hand Side Of Machine
| 4D***90 | Battery Wiring And Lighting Group | 1 |
Camshaft And Governor
3s1465 Carburetor And Breather Group
| 3S***65 | Carburetor And Breather Group | 1 |
7m6038 Carburetor Assembly
| 7M***38 | Carburetor Assembly | 1 |
8m8420 Clutch Group
| 8M***20 | Clutch Group | 1 |
Connecting Rod And Piston--2 Required
Crankshaft
Cylinder Block, Cylinder Head And Valve Mechanism--Part 1 Of 2
Cylinder Block, Cylinder Head And Valve Mechanism--Part 2 Of 2
2m6646 Dash Lamp Assembly--12 Volt
| 2M***46 | Dash Lamp Assembly | 1 |
Electric Starter--12 Volt
8m9923 Electric Starting Motor Assembly--12 Volt
| 8M***23 | Electric Starting Motor Assembly | 1 |
2m856 Flood Lamp Assembly--12 Volt--Type 1
| 2M***56 | Flood Lamp Assembly | 1 |
2m856 Flood Lamp Assembly--12 Volt--Type 2
| 2M***56 | Flood Lamp Assembly | 1 |
4d1920 Fuel System Group
| 4D***20 | Fuel System Group | 1 |
Generator--12 Volt, 40 Ampere
1m6058 Generator Assembly--12 Volt, 40 Ampere
| 1M***58 | Generator Assembly | 1 |
2m4166 Head Lamp Assembly--12 Volt--Type 1
| 2M***66 | Head Lamp Assembly | 1 |
2m4166 Head Lamp Assembly--12 Volt--Type 2
| 2M***66 | Head Lamp Assembly | 1 |
8m2577 Ignition System Group
| 8M***77 | Ignition System Group | 1 |
5d792 Indicator Lamp Assembly
| 5D***92 | Indicator Lamp Assembly | 1 |
3s2986 Magneto Assembly
| 3S***86 | Magneto Assembly | 1 |
9m1713 Oil Pump Assembly
| 9M***13 | Oil Pump Assembly | 1 |
4d2510 Starting Engine Control Group--Part 2 Of 2
| 4D***10 | Starting Engine Control Group | 1 |
4d2510 Starting Engine Control Group--Part 1 Of 2
| 4D***10 | Starting Engine Control Group | 1 |
Starting Engine Support
7h7290 Disconnect Switch Assembly
| 7H***90 | Switch As-Disconnect | 1 |
3s1763 Transmission And Starter Pinion Group--Part 1 Of 2
| 3S***63 | Transmission And Starter Pinion Group | 1 |
3s1763 Transmission And Starter Pinion Group--Part 2 Of 2
| 3S***63 | Transmission And Starter Pinion Group | 1 |
8m2578 Water Lines Group
| 8M***78 | Water Lines Group | 1 |
Transmission And Chassis
7m8392 Accumulator Body Group
| 7M***92 | Accumulator Body Group | 1 |
6j3000 Accumulator Charging Valve Group--Type 1
| 6J***00 | Accumulator Charging Valve Group | 1 |
6j3000 Accumulator Charging Valve Group--Type 2
| 6J***00 | Accumulator Charging Valve Group | 1 |
5j9231 Accumulator Group
| 5J***31 | Accumulator Group | 1 |
6j6664 Accumulator Lines Group
| 6J***64 | Accumulator Lines Group | 1 |
Air And Brake Control (4d2630 N/S)--Part 2 Of 5
| 4D***30 | Air And Brake Control | 1 |
Air And Brake Control (4d2630 N/S)--Part 1 Of 5
| 4D***30 | Air And Brake Control | 1 |
Air And Brake Control (4d2630 N/S)--Part 5 Of 5
| 4D***30 | Air And Brake Control | 1 |
Air And Brake Control (4d2630 N/S)--Part 4 Of 5
| 4D***30 | Air And Brake Control | 1 |
Air And Brake Control (4d2630 N/S)--Part 3 Of 5
| 4D***30 | Air And Brake Control | 1 |
Bevel Gear And Differential (3d9600 N/S)--Top View
| 3D***00 | Bevel Gear And Differential | 1 |
Brakes (4j8027 N/S)
| 4J***27 | Brake Group | 1 |
5d3640 Brake Valve Assembly
| 5D***40 | Brake Valve Assembly | 1 |
4d3279 Retarder Hand Valve Assembly
| 4D***79 | Brake Valve Assembly | 1 |
Brakes (4h8027 N/S)
| 4H***27 | Brakes | 1 |
Bumper
8s3515 By-Pass Valve Group
| 8S***15 | By-Pass Valve Group | 1 |
6j4613 By-Pass Valve Group
| 6J***13 | By-Pass Valve Group | 1 |
Cushion Hitch Lines And Valves (6d4390 N/S)--Part 2 Of 2
| 6D***90 | Cushion Hitch Lines And Valves | 1 |
Cushion Hitch Lines And Valves (6d4390 N/S)--Part 1 Of 2
| 6D***90 | Cushion Hitch Lines And Valves | 1 |
Cushion Hitch Lines (6j3493 N/S)
| 6J***93 | Cushion Hitch Lines Group | 1 |
6j3493 Cushion Hitch Lines Group
| 6J***93 | Cushion Hitch Lines Group | 1 |
Differential Case And Covers--Part 1 Of 2
Differential Case And Covers--Part 2 Of 2
4d8592 Differential Cylinder Assembly
| 4D***92 | Differential Cylinder Assembly | 1 |
Differential Lock
Drive Shaft
7j100 External Control Valve Group
| 7J***00 | External Control Valve Group | 1 |
Fenders (6d3840 N/S)
| 6D***40 | Fenders | 1 |
8j3683 Filter Changeover Group--Field Installation
| 8J***83 | Filter Changeover Group | 1 |
6j6608 Filter Group
| 6J***08 | Filter Group | 1 |
7j680 Hydraulic Oil Filter Group
| 7J***80 | Filter Group-Hydraulic Oil | 1 |
5d110 Final Drive And Wheel Group--33.50 X 39 Tubeless Tires
| 5D***10 | Final Drive And Wheel Group | 1 |
Final Drive And Wheels (4d5500 N/S)--37.50 X 39 Tubeless Tires
| 4D***00 | Final Drive And Wheels | 1 |
2s500 Governor Group
| 2S***00 | Governor Group | 1 |
Hitch And Steering--Part 2 Of 3
Hitch And Steering--Part 3 Of 3
Hitch And Steering--Part 1 Of 3
Hood And Exhaust Extension (6d4080 N/S)--Part 2 Of 2
| 6D***80 | Hood And Exhaust Extension | 1 |
Hood And Exhaust Extension (6d4080 N/S)--Part 1 Of 2
| 6D***80 | Hood And Exhaust Extension | 1 |
5d6998 Pneuphonic Horn Assembly
| 5D***98 | Horn Group-Air | 1 |
3g2433 Hose Assembly
| 3G***33 | Hose As | 1 |
| 3S***16 | Sleeve Assem. | 2 |
| 3S***73 | Stem Assem. (90 Degrees-Short) | 1 |
5j5427 Control Lever Housing Group--Type 1
| 5J***27 | Housing Group-Lever | 1 |
5j5427 Control Lever Housing Group--Type 2
| 5J***27 | Housing Group-Lever | 1 |
6j4140 Hydraulic Oil Filter And Valve Group
| 6J***40 | Hydraulic Oil Filter And Valve Group | 1 |
4j1707 Hydraulic Oil Filter Group
| 4J***07 | Hydraulic Oil Filter Group | 1 |
6j1721 Hydraulic Oil Filter Group--Type 2
| 6J***21 | Hydraulic Oil Filter Group | 1 |
6j1721 Hydraulic Oil Filter Group--Type 1
| 6J***21 | Hydraulic Oil Filter Group | 1 |
6j1721 Hydraulic Oil Filter Group
| 6J***21 | Hydraulic Oil Filter Group | 1 |
4j823 Hydraulic Pump Assembly
| 4J***23 | Hydraulic Pump Assembly | 1 |
7j861 Hydraulic Pump Assembly
| 7J***61 | Hydraulic Pump Assembly | 1 |
4j2271 Hydraulic Pump Assembly
| 4J***71 | Hydraulic Pump Assembly | 1 |
6d4000 Hydraulic Tank Group
| 6D***00 | Hydraulic Tank Group | 1 |
6j4931 Hydraulic Tank Group
| 6J***31 | Hydraulic Tank Group | 1 |
Hydraulic Torque Converter
6j6400 Leveling Valve Group--Part 1 Of 2--Type 1
| 6J***00 | Leveling Valve Group | 1 |
6j6400 Leveling Valve Group--Part 2 Of 2--Type 1
| 6J***00 | Leveling Valve Group | 1 |
6j6400 Leveling Valve Group--Part 1 Of 2--Type 2
| 6J***00 | Leveling Valve Group | 1 |
6j6400 Leveling Valve Group--Part 2 Of 2--Type 2
| 6J***00 | Leveling Valve Group | 1 |
5j9957 Steering Lines Group
| 5J***57 | Lines Group-Steering | 1 |
5j8623 Load Cylinder Group--8.25" Bore X 10" Stroke
| 5J***23 | Load Cylinder Group | 1 |
8s3333 Override Selector Valve Group
| 8S***33 | Override Selector Valve Group | 1 |
Planetary Torque Divider And Converter
Planetary Transmission--Part 1 Of 2
Planetary Transmission--Part 2 Of 2
2s4996 Pressure Control Valve Group
| 2S***96 | Pressure Control Valve Group | 1 |
8m8249 Pressure Control Valve Group
| 8M***49 | Pressure Control Valve Group | 1 |
8s698 Pressure Control Valve Group
| 8S***98 | Pressure Control Valve Group | 1 |
9j8186 Hydraulic Vane Pump Group
| 9J***86 | Pump Group-Vane Basic | 1 |
7m5925 Range Transmission Arrangement
| 7M***25 | Range Transmission Arrangement | 1 |
1s3249 Relief Valve Group
| 1S***49 | Relief Valve Group | 1 |
5d6636 Retarder Assembly
| 5D***36 | Retarder Assembly | 1 |
Retarder Lines--Part 2 Of 2
Retarder Lines--Part 1 Of 2
Retarder Oil Cooler--Part 2 Of 2
Retarder Oil Cooler--Part 1 Of 2
3d2744 Rotochamber Assembly
| 3D***44 | Rotochamber | 1 |
8s3330 Safety Reset And Converter Hold Valve Group
| 8S***30 | Safety Reset And Converter Hold Valve Group | 1 |
2m3409 Safety Reset And Converter Hold Valve Group
| 2M***09 | Safety Reset And Converter Hold Valve Group | 1 |
Scavenge Pump
1s3201 Scavenge Pump Group
| 1S***01 | Scavenge Pump Group | 1 |
6j4930 Scraper Control Valve Group--Part 2 Of 2
| 6J***30 | Scraper Control Valve Group | 1 |
6j4930 Scraper Control Valve Group--Part 1 Of 2
| 6J***30 | Scraper Control Valve Group | 1 |
Scraper Hitch Lines (6d4560 N/S)--Part 2 Of 2
| 6D***60 | Scraper Hitch Lines | 1 |
Scraper Hitch Lines (6d4560 N/S)--Part 1 Of 2
| 6D***60 | Scraper Hitch Lines | 1 |
Scraper Pump, Lines And Tank (6d3020 N/S)--Part 2 Of 2
| 6D***20 | Scraper Pump, Lines And Tank | 1 |
Scraper Pump, Lines And Tank (6d3020 N/S)--Part 1 Of 2
| 6D***20 | Scraper Pump, Lines And Tank | 1 |
Seat Frame And Platform (6d3370 N/S)--Part 1 Of 2
| 6D***70 | Seat Frame And Platform | 1 |
Seat Frame And Platform (6d3370 N/S)--Part 2 Of 2
| 6D***70 | Seat Frame And Platform | 1 |
5d8901 Seat Suspension Assembly
| 5D***01 | Seat Suspension Assembly | 1 |
7d2269 Seat Suspension Assembly
| 7D***69 | Seat Suspension Assembly | 1 |
1p7548 Selector Body Group--Type 2
| 1P***48 | Selector Body Group | 1 |
1p7548 Selector Body Group--Type 1
| 1P***48 | Selector Body Group | 1 |
2s7856 Selector Body Group
| 2S***56 | Selector Body Group | 1 |
1p7549 Selector Valve Group
| 1P***49 | Selector Valve Group | 1 |
5j8766 Selector Valve Group
| 5J***66 | Selector Valve Group | 1 |
2s7855 Selector Valve Group
| 2S***55 | Selector Valve Group | 1 |
3s6890 Selector Valve Group
| 3S***90 | Selector Valve Group | 1 |
5j8606 Steering Cylinder Group (Changes 0-5)--38.1 Mm (1.50 In) Bore X 238.8 Mm (9.40 In) Stroke
| 5J***06 | Servo-Master Steering Cylinder Group | 1 |
5d9525 Slack Adjuster Assembly--R.H.
| 5D***25 | Slack Adjuster Assembly--R.H.,Slack Adjuster Assembly--L.H. | 1 |
5j8149 Steering Cylinder Group--7.25" Bore X 48.50" Stroke--2 Required
| 5J***49 | Steering Cylinder Group | 1 |
5j7977 Steering Cylinder Group--2" Bore X 5" Stroke
| 5J***77 | Steering Cylinder Group | 1 |
Steering Cylinder, Valve And Lines
Steering Cylinder, Valves And Lines
Steering Gear--Part 2 Of 2
Steering Gear--Part 1 Of 2
Steering Pump And Lines (6d3980 N/S)
| 6D***80 | Steering Pump And Lines | 1 |
Tank, Filter, Pump And Lines
8m1071 Planetary Torque Divider Group
| 8M***71 | Three Speed Planetary Torque Divider | 1 |
3s118 Throttle Pressure And Converter Hold Valve Group
| 3S***18 | Throttle Pressure And Converter Hold Valve Group | 1 |
Torque Divider Hydraulic Control
5m6680 Torque Divider Retarder Arrangement
| 5M***80 | Torque Divider Retarder Arrangement | 1 |
Transmission Control--Part 2 Of 2
Transmission Control--Part 1 Of 2
Transmission Hydraulic Control (4s8611 N/S)--End View--Part 2 Of 2
| 4S***11 | Transmission Hydraulic Control | 1 |
Transmission Hydraulic Control (4s8611 N/S)-End View - Part 2 Of 2
| 4S***11 | Transmission Hydraulic Control | 1 |
Transmission Hydraulic Control (4s8611 N/S)--Top View--Part 1 Of 2
| 4S***11 | Transmission Hydraulic Control | 1 |
Transmission Hydraulic Control--(4s8611 N/S)--End View--Part 2 Of 2
| 4S***11 | Transmission Hydraulic Control | 1 |
5j7260 Transmission Oil Filter Group
| 5J***60 | Transmission Oil Filter Group | 1 |
3s1458 Transmission Oil Level Gauge Group
| 3S***58 | Transmission Oil Level Gauge Group | 1 |
8s670 Transmission Pump Group
| 8S***70 | Transmission Pump | 1 |
Transmission Pump And Lines (6d2844 N/S)--Part 2 Of 3
| 6D***44 | Transmission Pump And Lines | 1 |
Transmission Pump And Lines (6d2844 N/S)-Part 1 Of 3
| 6D***44 | Transmission Pump And Lines | 1 |
Transmission Pump And Lines (6d2844 N/S)--Part 3 Of 3
| 6D***44 | Transmission Pump And Lines | 1 |
Transmission Pump And Lines (6d2844 N/S)--Part 1 Of 3
| 6D***44 | 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 |
5d4382 Air Valve Assembly
| 5D***82 | Valve As-Air Control; -Parking Brake | 1 |
5d3056 Double Check Valve Assembly
| 5D***56 | Valve As-Double Check; -Brakesaver Air Supply | 1 |
3d9943 Horn Valve Assembly
| 3D***43 | Valve As-Horn | 1 |
6d3546 Safety Valve Assembly
| 6D***46 | Valve As-Safety | 1 |
4d1669 Control Valve Assembly
| 4D***69 | Valve Assembly | 1 |
6j60 Relief Valve Group
| 6J***60 | Valve Group-Relief; -Trailing Unit Main Control | 1 |
Windshield (3d4890 N/S)
| 3D***90 | Windshield Group | 1 |
641 serial number reference
On these mechanical-era Cat 641/641B tractor-scrapers the serial/PIN plate is riveted to the machine frame, typically on the left-hand frame rail near the operator's platform or on the main frame ahead of the articulation hitch; the scraper bowl often carries its own riveted plate as a separately serialized unit. Read the first three characters as the prefix, which identifies the model and production series (e.g. 41M, 80F, 42M), and the digits following it as the individual unit number within that series.
| Prefix | Identifies | Notes |
|---|---|---|
| 41M | 641 original series, tractor unit | Cat 641 wheel tractor-scraper launched 1962 as part of the new 600-family motor scrapers, moving from cable-operated bowl control to full hydraulic control. Fitted with the Cat D346 60-degree V8 turbocharged diesel, rated 450 flywheel hp at launch and raised to 500 hp in 1965. Uses the nine-speed full-powershift, barrel-type planetary transmission. 41M identifies the tractor unit of the original (pre-B) 641 in parts and service literature. |
| 80F | 641 original series, later production block | Covers roughly 80F1 through 80F687 per 641 parts and hydraulic manuals, paired with the 70G series in the same literature. Falls within the pre-641B production run (1962-1969), ahead of the 641B update. |
| 70G | 641 original series, companion serial run | Covers roughly 70G1 through 70G547, listed alongside 80F1-and-up in the same 641 parts and hydraulic manuals. Same generation and production block as 80F, likely a separately serialized component (scraper bowl or hydraulic system) rather than a second tractor run. |
| 42M | 641B updated series (from 1969) | 641B introduced 1969 with an 8-speed semi-automatic transmission and flywheel output raised to 550 hp. Service literature for the 641B tractor-scraper (shared coverage with 650, 651B, 671K, 660B) covers 42M1-and-up. |
| 43M | 641B updated series - possible overlap with original 641 | Appears in 641B tractor-scraper service coverage alongside 42M1 and 65K1-and-up. A separate manual listing instead attributes a 43M-prefixed manual to the original (pre-B) 641 wheel scraper. Sources disagree on which generation this prefix belongs to - confirm with dealer before using for parts lookup. |
| 65K | 641B wheel tractor unit (no scraper bowl) | Identifies the tractor-only unit within the 641B family (also used on the related 651B). Appears both in the combined 641B/650/651B/671K/660B service coverage (65K1-and-up) and in a separate service manual titled specifically for the 641B/651B wheel tractor, so the tractor-only scope is well supported. |
Frequently asked questions
What engine powers the Caterpillar 641?
The Caterpillar D346, a 60-degree V8 turbocharged diesel of 19.5 L (1,190 cu in). It produced 450 hp at the 1962 launch, rose to about 500 hp by the mid-1960s, and the 641B (from 1969) uprated the same engine family to 550 hp.
What is the operating weight of the Caterpillar 641?
Roughly 110,000-119,000 lb (50,000-54,000 kg), varying by series and configuration. The 641B is documented at approximately 119,000 lb (54,000 kg) standard operating weight.
What replaced the Caterpillar 641?
Nothing directly. Caterpillar discontinued the 641 in 1978 without a one-for-one successor in that capacity class; the larger 651 and 657 wheel tractor-scrapers continued in the lineup while the 641's specific slot in the range was not refilled.
What 641 owners discuss
What's the real-world reputation of the D346 V8 across 641 production, and does it hold up long term?
Treat the 641 as spanning at least two distinct engine generations under the same D346 name. The earlier lineage that opened the line in 1962 runs weaker across the rev range than later production, and a hard overspeed event - easy to trigger on a missed downshift - can take out the engine and the transmission together since the two share load paths on this driveline. Heavy black exhaust and an audible injection rattle on a cold start are normal for this engine family, not a fault by themselves, and cold starts do need extended glow-plug heat time. Rated output moved from 336 kW (450 hp) at 1900 rpm on early machines up to 373 kW (500 hp), with the later 60-degree D346 considered the sturdier redesign. Have your dealer verify actual output, compression, and any history of overspeed or runaway before relying on the engine for production work.
How particular is the nine-speed powershift about adjustment, and what fails first?
Owners are consistent that the shift linkage has to be spot-on or the transmission won't shift cleanly - a lot of reported "transmission trouble" traces back to linkage adjustment rather than internal wear. Beyond that, clutch pack drag or slipping engagement is usually a hydraulic problem: worn or hardened piston seals, a weak charge pump, a restricted filter, or simply the wrong oil. Use a transmission fluid built to the TO-4 friction spec rather than engine oil or GL-5 gear oil, since Cat's friction material needs the correct friction coefficient to grip. Note the 641B's semi-automatic transmission is a different system from the 641's manual powershift - don't carry over diagnosis or adjustment steps between the two without confirming which one you actually have.
What hydraulic quirks show up on the bowl, apron, and gooseneck?
The bowl lift cylinders use check valves specifically to stop the bowl from dropping suddenly if a hose fails or pressure bleeds off - confirm this is still holding before trusting the machine loaded. The apron cylinder is buried inside the gooseneck casting, so a slow leak there can go unnoticed until fluid shows at the seam; check that area on any prospective purchase. A synchronization switch, made standard on later production, coordinates apron and bowl travel, and an out-of-adjustment or disconnected switch is a recurring owner complaint. Cushion hitch, optional from 1968 and standard by 1974, was added because the earlier rigid hitch rode hard and pounded both the operator and the hydraulics on rough haul roads - an early machine without it will show more wear on hoses and fittings. Have your dealer verify bowl-cylinder check-valve function before working under a raised or loaded bowl.
What wear patterns are typical for a machine this size and weight?
Loaded weight runs around 80 tonnes (89 tons) against roughly 43 tonnes (47 tons) empty, so tires and final drives see a heavy duty cycle relative to their size. Final drive bearing wear tracks oil condition more than raw hours - contamination or a low sump from a weeping seal accelerates wear faster than age alone, so oil sampling tells you more than an hour-meter does. Cutting edge and apron wear are the other predictable points: the apron is a box-section design with an integral casting meant to resist denting, but the leading edge still wants regular inspection since the apron carries a meaningful share of the load during the cut. If you find a machine fitted with the extreme-service bowl option, wearing areas will be heavier-gauge steel than standard.
What electrical issues come up, given this predates modern sensors?
There's no engine control module or sensor network to worry about here - the charging system is 24V, with a generator on the earliest machines giving way to alternator setups (commonly a one-wire aftermarket-style unit) as production ran into the 1970s. Reported symptoms are an ammeter that won't register, lights dimming after the machine has been running a while, and intermittent charging - almost always traced to the voltage regulator or corroded wiring and grounds rather than the alternator itself, so test the regulator before condemning the alternator. Original-pattern instrument gauges are the hardest items to source since exact reproductions generally aren't available; expect to hunt aftermarket faces or have originals rebuilt.
What should I check before buying a used 641?
First confirm which engine generation is fitted, since output and reliability expectations differ between early and late D346 production. Ask directly about overspeed or runaway history - this engine and transmission combination is unforgiving of it. Run the transmission through its full range and feel for harsh or delayed engagement, a sign of clutch-pack or charge-pump wear rather than just a linkage adjustment. Cycle the bowl, apron, and ejector under load and watch the gooseneck and cylinder rod seals for weeping. Check whether a cushion hitch is fitted (standard from 1974) as a rough indicator of a later, easier-riding machine. Inspect tire condition and final drive oil level and color, since replacement tires at this size are a major cost on their own. Have your dealer verify air-brake and hydraulic-retarder function and transmission clutch condition before you rely on the machine for production hauling - this is the primary service brake on a machine that loads out to roughly 80 tonnes.
How hard is it to find parts and documentation for a 641 today?
Mechanical driveline and hydraulic components are generally still obtainable through Cat parts channels, since much of the 600-series scraper family shares design across models, though original part numbers have often been superseded and need cross-referencing against your machine's serial prefix before ordering. The items owners report as genuinely hard to source are cosmetic and instrument-panel pieces - decals and original-pattern gauges in particular, since exact factory reproductions generally aren't carried for equipment this old. Identify your serial prefix before assuming parts interchange, since related models in the same family shared model-number conventions but not every component crosses over between them.
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 641. Related factory variants of the same model family:
641
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