Caterpillarwheel-type loaderwheel loader
Caterpillar 980
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar 980 wheel loader covered here is the original, pre-980B version, built from 1966 under PIN prefix 42H. It is a large articulated wheel loader for its era, powered by a mechanically governed Caterpillar D336TA diesel — a 60-degree V8, turbocharged and aftercooled, rated 224 kW (300 hp) at the flywheel. The main V8 is started by a small gasoline pony motor with its own magneto ignition and carburetor, standard practice on big Caterpillar diesels before electric starting became universal on machines this size. Caterpillar used the D336TA in only one other machine, the J621 elevating scraper. It was offered as a wheel loader with bucket and general material-handling work tools typical of the period; specific factory configuration options, operating weight, dimensions, bucket capacity, and travel speeds for this exact serial range are not documented in public sources. This original 980 is the direct predecessor to the 980B, introduced around 1970 with a Caterpillar 3306 engine and roughly 23,400 kg (51,500 lb) operating weight under PIN prefix 89P, which in turn led the lettered-generation line through 980C, F, F II, G, G II, and H.
The move from this V8 original to the 980B was a full powertrain change, not just a horsepower revision: Caterpillar dropped the D336TA V8 for an inline-six 3306, a simpler and more serviceable engine that carried the 980 name for decades afterward and eliminated the pony-motor starting system entirely. That change followed field experience with the D336TA on both the 980 and the J621 scraper — the V8 was powerful for its day but earned a reputation for shorter service life and heavier upkeep than Cat's inline sixes, and some owners of D336TA-powered machines used a factory-supported repower to an inline-six diesel (3306 or 3406) instead of rebuilding the V8 at overhaul time. In today's used and parts market, this original 980 sits outside normal fleet circulation: parts support is thin compared with the later letter-series machines, and most surviving units are sought by vintage-Caterpillar collectors and restorers specifically after the early V8/pony-motor configuration rather than by buyers looking for a working production loader.
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 980 specifications
Engine
| Engine model | Caterpillar D336TA, a 60-degree V8 diesel with turbocharger and aftercooling. Part of Caterpillar's D330-family engine line built during this era. |
| Gross power | 224 kW (300 hp) flywheel rating, per period factory literature for this engine arrangement. This V8 was fitted to only one other Caterpillar machine of the era, the J621 elevating scraper. |
| Net power | Not documented separately for this era — verify with your dealer. |
| Displacement | Not reliably documented for this engine arrangement. Published figures conflict across sources — verify with your dealer or the engine arrangement plate. |
| Cylinders | 8, in a 60-degree V configuration. |
| Starting system | Gasoline-fueled starting engine (pony motor) with magneto ignition and its own carburetor, used to crank the main diesel. Separate 12-volt and 24-volt generator/charging groups covered the starting-engine and main-engine electrical needs, typical of Caterpillar diesels of this vintage before full electric start became standard. |
Weights
| Operating weight | Not documented for this serial range in available sources — verify with your dealer or the machine's data plate. |
| Shipping weight | Not documented for this serial range in available sources — verify with your dealer. |
Dimensions
| Transport length, width, height | Not documented for this serial range in available sources — verify with your dealer or the operation and maintenance manual for this serial range. |
| Wheelbase | Not documented for this serial range in available sources — verify with your dealer. |
| Ground clearance | Not documented for this serial range in available sources — verify with your dealer. |
Performance
| Travel speeds | Not documented for this serial range in available sources — verify with your dealer. |
| Breakout force / lift capacity | Not documented for this serial range in available sources — verify with your dealer. |
| Bucket capacity range | Not documented for this serial range in available sources. This is a large wheel loader in the same size class as the models that followed it, but no verified bucket-capacity figure was found for this original machine — verify with your dealer. |
Service capacities (summary)
| Fuel tank | Not documented for this serial range in available sources — verify with your dealer. |
| Hydraulic system | Not documented for this serial range in available sources — verify with your dealer. |
| Engine oil | Not documented for this serial range in available sources — verify with your dealer. |
| Cooling system | Not documented for this serial range in available sources — verify with your dealer. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
980 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Not published in accessible sources for the 42H-serial (original) 980. Confirm the exact refill quantity against this machine's own operation & maintenance manual or a dealer parts lookup by serial number. | Caterpillar's diesel engine oil recommendation for this era was graded by ambient operating temperature — lighter viscosity for cold starts, heavier monograde for sustained warm-climate work. This predates the modern Cat DEO branding. The exact viscosity chart for this serial range is not confirmed in available sources; follow the OMM lubricant chart for the correct grade by season. |
| Cooling system | Not published in accessible sources for this serial range. Verify against the OMM or a dealer before servicing. | Period Cat practice called for a water and ethylene-glycol mix with Caterpillar's cooling-system corrosion/mineral inhibitor added at each service interval. Full-formulation antifreeze coolants of the modern ELC type postdate this machine. Confirm the exact product and mix ratio against the OMM. |
| Fuel tank | About 360 L (95 US gal), per Caterpillar's factory parts documentation for the 42H serial range. Treat as approximate — this figure could not be cross-checked against a second independent source, so confirm against the OMM or tank markings. | Standard diesel fuel. No special Caterpillar-branded fuel additive is called out for this machine's fuel system. |
| Transmission / torque converter compartment | Not published in accessible sources for this serial range. | The 42H-series 980 drives through a torque-converter powershift transmission. Caterpillar's dedicated Transmission/Drive Train Oil (TDTO) product line postdates the early production of this machine; comparable-era Cat powershift equipment commonly specified a straight diesel engine oil grade in the torque converter/transmission housing instead. The exact product and viscosity Caterpillar called out for this specific serial range is not confirmed — check the OMM lubricant chart, since guidance changed over this machine's production run. |
| Final drives (each wheel station) | Not published in accessible sources for this serial range. | Cat-spec gear oil as called out in the OMM lubrication chart for this era's powershift-drive final drives. Confirm the exact product name and seasonal viscosity against the manual. |
| Hydraulic system and tank | Not published in accessible sources for this serial range. The loader's hydraulic tank and valve group is a reservoir separate from the transmission, but its factory fill volume is not documented in accessible sources. | Period Cat guidance for wheel loaders of this class generally used the same engine-oil-grade fluid elsewhere applied in the powertrain for the loader hydraulic circuit. The specific product name for this serial range is not confirmed — verify against the OMM lubricant chart before topping off or changing hydraulic fluid. |
| Axles and differentials (front and rear) | Not published in accessible sources for this serial range. | This machine was factory-offered with either a No-Spin or a Torque-Proportioning differential group; each takes a Cat-spec axle gear oil sized to the differential fitted. Confirm the exact product, viscosity, and quantity against the OMM, since the recommendation can vary by which differential option is installed. |
| Grease (chassis lubrication points) | Not a bulk-fill system — serviced per grease-point interval in the OMM, not a single tank capacity. | Multipurpose-type chassis grease, NLGI 2 grade, for pivot pins, linkage, and steering-frame lubrication points, per Caterpillar's standard long-running recommendation across its equipment line. Apply at the intervals listed in the OMM lubrication chart. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 980 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the 980 beyond the schedule
Predictive Maintenance & Fluid Analysis
Run oil sampling on the D336TA V8 at every oil change — this engine has a documented history of shorter top-end life than Cat's inline sixes, so trending metal content in the sample catches ring and liner wear early. Track pony motor oil and fuel condition too; a fouled carburetor or weak magneto output shows up as hard starting long before the main engine is affected. Watch coolant condition closely, since the V8's tighter cylinder head passages are less tolerant of scale buildup than a straight-six block.
Corrective & Common Repairs
Expect magneto and carburetor work on the pony motor as routine, not exceptional — points, condenser, and jet cleaning are the most common fixes that keep the main engine startable. On the D336TA itself, injector and injection-pump service comes up often given its mechanical governor and V8 layout, which spreads injection work across two cylinder banks instead of one inline row. Articulation hitch pins, steering cylinder seals, and loader linkage bushings wear steadily under daily digging loads and are frequent corrective jobs on machines this age.
Overhaul & Rebuild Points
At major overhaul, the D336TA V8 is the priority: liners, pistons, rings, and bearings on both banks, plus a full injection pump and injector recalibration. Because parts support for this V8 is thinner than for Cat's inline-six engines, some owners use rebuild time to evaluate a factory-style repower to a 3306 or 3406 inline six rather than source another D336TA. Beyond the engine, plan on rebuilding the torque converter or transmission, final drives, and the articulation/steering cylinders as a set, since all wear together over the same service life.
Seasonal & Environment Servicing
Cold-weather starts depend on the pony motor and its magneto — keep ignition components dry and the carburetor jetted correctly, since a weak spark or an icing carburetor means the V8 never gets cranked over. Use correct seasonal viscosity in both the pony motor and the D336TA crankcase, and drain fuel filters more often in humid conditions. In dusty environments, service the main air cleaner and turbocharger inlet more often than standard, since the D336TA's turbocharger and aftercooler are more sensitive to inlet contamination than a naturally aspirated engine.
980 common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 2S-6626 | Fuel Filter | Fuel system service | Check fitment → |
| 1S-5132 | Oil Filter Assembly | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
980 attachments & work tools
General purpose buckets
Factory general purpose buckets ran roughly 4.0-5.0 cu yd (about 3.1-3.8 m3), in widths near 118-126 in (3.0-3.2 m). Multiple capacity/width pairings were offered across the production run, so match bucket to the specific machine configuration rather than assuming one size.
Rock / quarry bucket
A reinforced rock-loading bucket was offered alongside the general purpose bucket, similar capacity class (around 4.5 cu yd / 3.4 m3 at 126 in / 3.2 m wide) but heavier structure for bank and face loading in abrasive, high-impact material.
Bolt-on cutting edges
Heavy-duty and light-duty cutting edges were field-installable on the bucket, letting the edge pattern be matched to ground/material conditions and replaced without swapping the whole bucket.
Log fork / logging arrangement
A forestry-oriented log fork arrangement mounted a fork carriage-and-clamp assembly to the loader arms in place of a bucket for picking and stacking logs. A companion logging arrangement package added matched rims/tires and a counterweight for balance in yard and forestry duty.
Rear-mounted ripper-scarifier arrangement
A factory rear-mounted ripper-scarifier arrangement used its own hydraulic cylinders to raise and lower ripper or scarifier shanks off the back of the machine. Mounting the tool over the rear axle put drive-tire weight behind the shanks for penetration, a layout also used on other Cat wheel loaders of this era.
Auxiliary hydraulic (3rd valve) arrangement
The base hydraulic circuit covered lift and tilt only (2 valve sections). A 3rd-valve hydraulic control arrangement, offered in separate front-attachment and rear-attachment versions, added the extra valve section, hand control, relief valve, and lines needed to run work tools such as the ripper or fork clamp. A factory conversion kit could upgrade an existing 2-valve machine to 3-valve.
Attachment mounting method
This generation predates hydraulic quick-coupler systems. Buckets pin directly to the loader arms and tilt linkage; forks and similar tools mount through a bolted carriage-and-clamp assembly. Tool changes are manual pin/bolt work, not an in-cab coupler swap.
Counterweights
Rear counterweight groups in a few distinct weights were available to rebalance the machine when running heavier front or rear attachments, including forestry configurations. Weight fitted depends on the attachment package installed, so verify against the specific arrangement in use.
All 980 assemblies by section
Every catalogued assembly group for the Caterpillar 980. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Attachments
9s1932 Cover Group--Type 2
| 9S***32 | Cover Group | 1 |
9s1932 Cover Group--Type 1
| 9S***32 | Cover Group | 1 |
5k7700 980 Ripper-Scarifier Arrangement
| 3S***42 | Film | 1 |
| 5J***56 | Hydraulic Cylinder Group; Cylinder Group | 2 |
| 5K***45 | Ripper Ar-Basic; Ripper--Scarifier Group | 1 |
4s7341 Air Cleaner And Exhaust System Group--Type 1
| 4S***41 | Air Cleaner And Exhaust System Group | 1 |
4s7341 Air Cleaner And Exhaust System Group--Type 2
| 4S***41 | Air Cleaner And Exhaust System Group | 1 |
4s6883 Alternator Arrangement--12 Volt, 60 Ampere
| 4D***62 | Switch Assem. (Heat & Start) | 1 |
| 4S***63 | Alternator Group | 1 |
| 4S***83 | Alternator Arrangement | 1 |
4s6882 Alternator Arrangement--24 Volt, 45 Ampere
| 4S***48 | Alternator Group | 1 |
| 4S***82 | Alternator Arrangement | 1 |
| 5K***50 | Wiring Group | 1 |
1s2585 Alternator Assembly--12 Volt, 60 Ampere
| 1S***85 | Alternator Assembly | 1 |
1s2584 Alternator Assembly--24 Volt, 45 Ampere
| 1S***84 | Alternator Assembly | 1 |
4s6463 Alternator Group--12 Volt, 60 Ampere
| 4S***63 | Alternator Group | 1 |
4s6448 Alternator Group--24 Volt, 45 Ampere
| 4S***48 | Alternator Group | 1 |
6j1733 Auxiliary Relief Valve Group
| 6J***33 | Auxiliary Relief Valve Group | 1 |
1v4357 Basic Wiper Group--12 Volt
| 1V***57 | Basic Wiper Group | 1 |
5k4431 Battery And Wiring Group--12 Volt--As Viewed From Right Hand Side Of Machine--Part 1 Of 2
| 5K***31 | Battery And Wiring Group | 1 |
5k4431 Battery And Wiring Group--12 Volt--Top View--Part 2 Of 2
| 5K***31 | Battery And Wiring Group | 1 |
5k5095 General Purpose Bucket Assembly--4 Cubic Yard--118" Wide
| 5K***95 | Bucket Assembly | 1 |
5k5634 General Purpose Bucket Assembly--4.50 Cubic Yard--126" Wide--Type 1
| 5K***34 | Bucket Assembly | 1 |
5k5385 Bucket Assembly--Rock Loading
| 5K***85 | Bucket Assembly | 1 |
5k5634 General Purpose Bucket Assembly--4.50 Cubic Yard--126" Wide--Type 2
| 5K***34 | Bucket Assembly | 1 |
6k5952 Bucket Assembly--Rock Loading--4.50 Cubic Yard--126" Wide
| 6K***52 | Bucket Assembly | 1 |
6k5345 General Purpose Bucket Assembly
| 6K***45 | Bucket Assembly | 1 |
6k8776 General Purpose Bucket Assembly--5 Cubic Yard--126" Wide
| 6K***76 | Bucket Assembly | 1 |
6k9080 Cab Arrangement
| 6K***50 | Cab Group | 1 |
| 6K***27 | Cab Mounting Group | 1 |
| 6K***80 | Cab Arrangement | 1 |
6k625 Cab Arrangement--Only Separate Parts Serviced.
| 6K***25 | Cab Arrangement | 1 |
| 6K***30 | Cab Group | 1 |
| 6K***31 | Cab Mounting Group | 1 |
6k8950 Cab Group--Part 1 Of 3
| 6K***50 | Cab Group | 1 |
6k8950 Cab Group--Part 2 Of 3
| 6K***50 | Cab Group | 1 |
6k4930 Cab Group--Part 3 Of 3
| 6K***30 | Cab Group | 1 |
6k4930 Cab Group--Part 1 Of 3
| 6K***30 | Cab Group | 1 |
6k8950 Cab Group--Part 3 Of 3
| 6K***50 | Cab Group | 1 |
6k4930 Cab Group--Part 2 Of 3
| 6K***30 | Cab Group | 1 |
6k1202 Cab Lighting System Group--12 Volt
| 6K***02 | Cab Lighting System Group | 1 |
6k9027 Cab Mounting Group
| 6K***27 | Cab Mounting Group | 1 |
6k4931 Cab Mounting Group
| 6K***31 | Cab Mounting Group | 1 |
6k651 Wiring Harness Assembly
| 6K***51 | Cab Wiring Harness Assembly | 1 |
Camshaft And Governor (2s886 N/S)
| 2S***86 | Camshaft And Governor | 1 |
Carburetor (2s8830 N/S)
| 2S***30 | Carburetor | 1 |
9m3171 Carburetor Assembly
| 9M***71 | Carburetor Assembly | 1 |
6k5237 Carriage And Clamp Group
| 6K***37 | Carriage And Clamp Group | 1 |
5k6020 Carriage And Clamp Group
| 5K***20 | Carriage And Clamp Group | 1 |
1s5938 Clutch Group
| 1S***38 | Clutch Group | 1 |
3s8548 Complete Gasoline Starting Engine Arrangement
| 0L***26 | Plug -13mm(.512 In.) Outside Dia. | 2 |
| 0S***85 | Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine | 4 |
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 2 |
Connecting Rod And Piston (8m2572 N/S)--2 Required
| 8M***72 | Connecting Rod And Piston | 1 |
5k4610 Control Group
| 5K***10 | Control Group | 1 |
5k7704 Conversion Arrangement To Convert A Two Valve To Three Valve Hydraulic
| 5J***05 | Conversion Group | 1 |
| 5K***65 | Hydraulic Hand Control Group | 1 |
| 5K***00 | Rear Hydraulic Lines Group | 1 |
5k7705 Conversion Arrangement To Convert A Two Valve To Three Valve Hydraulic
| 5J***05 | Conversion Group | 1 |
| 5K***00 | Front Hydraulic Lines Group | 1 |
| 5K***65 | Hydraulic Hand Control Group | 1 |
5j7505 Conversion Group--Type 3
| 5J***05 | Conversion Group | 1 |
5j7505 Conversion Group--Type 2
| 5J***05 | Conversion Group | 1 |
5j7505 Conversion Group--Type 1
| 5J***05 | Conversion Group | 1 |
5k6625 Counterweight Group--8400 Pounds
| 5K***25 | Counterweight Group | 1 |
7k7030 Counterweight Group--1740 Pounds--Top View
| 7K***30 | Counterweight Group | 1 |
9k149 Counterweight Group--1,740 Pounds
| 9K***49 | Counterweight Group | 1 |
5k6341 Counterweight Group--1880 Pounds--Top View
| 5K***41 | Counterweight Group | 1 |
2s3025 Protection Cover Group--Oil Filter Cap
| 2S***25 | Cover Group-Protection; Protection Cover Group | 1 |
2s6096 Protection Cover Group--Radiator Cap
| 2S***96 | Cover Group-Protection; Protection Cover Group-- Radiator Cap | 1 |
5d1900 Protection Cover Group--Hydraulic Tank Cap
| 5D***00 | Cover Group-Protection; Protection Cover Group-- Hydraulic Tank Cap | 1 |
Crankshaft (2s130 N/S)
| 2S***30 | Crankshaft | 1 |
7k1844 Cutting Edge Group--Heavy Duty--Field Installation
| 7K***44 | Cutting Edge Group | 1 |
7k2457 Cutting Edge Group--Light Duty--Field Installation
| 7K***57 | Cutting Edge Group | 1 |
1p3951 Cylinder Block Group--Part 1 Of 2
| 1P***51 | Cylinder Block Group | 1 |
1p3951 Cylinder Block Group--Part 2 Of 2
| 1P***51 | Cylinder Block Group | 1 |
Cylinder Block, Cylinder Head & Valve Mechanism (2s8871 N/S)--Part 2 Of 2
| 2S***71 | Cylinder Block, Cylinder Head & Valve Mechanism | 1 |
Cylinder Block, Cylinder Head & Valve Mechanism (2s8871 N/S)--Part 1 Of 2
| 2S***71 | Cylinder Block, Cylinder Head & Valve Mechanism | 1 |
4j7845 Cylinder Group--5.50" Bore X 21.38" Stroke--2 Required
| 4J***45 | Cylinder Group; Cylinder Group | 1 |
5j3497 Lift Cylinder Group--7.25" Bore X 39.7" Stroke
| 5J***97 | Cylinder Group; Cylinder Group | 1 |
Cylinder Head Assembly (6l7808 N/S)
| 6L***08 | Cylinder Head Assembly | 1 |
Cylinder Head Assembly (5s2967 N/S)
| 5S***67 | Cylinder Head Assembly | 1 |
7k1379 Cylinder Lines Group
| 7K***79 | Cylinder Lines Group | 1 |
2m6646 Dash Lamp Assembly--12 Volt
| 2M***46 | Dash Lamp Assembly | 1 |
6k1205 Defroster Fan Group--24 Volt--Type 1
| 6K***05 | Defroster Fan Group | 1 |
6k1204 Defroster Fan Group--12 Volt--Type 1
| 6K***04 | Defroster Fan Group | 1 |
6k1204 Defroster Fan Group--12 Volt--Type 2
| 6K***04 | Defroster Fan Group | 1 |
6k1205 Defroster Fan Group--24 Volt--Type 2
| 6K***05 | Defroster Fan Group | 1 |
2s785 Differential Group--No-Spin
| 2S***85 | Differential Group | 1 |
5k8152 Differential Group--Torque Proportioning
| 5K***52 | Differential Group | 1 |
9f740 Discharger
| 9F***40 | Discharger Group | 1 |
8m2581 Electric Starter Group--12 Volt
| 8M***81 | Electric Starter Group | 1 |
8m9923 Electric Starting Motor Assembly--12 Volt
| 8M***23 | Electric Starting Motor Assembly | 1 |
6k234 Ether Starting Aid Group
| 6K***34 | Ether Starting Aid Group | 1 |
4s6511 Fan Assembly--Reversible Blade
| 4S***11 | Fan Assembly | 1 |
5d2856 Defroster Fan Group--24 Volt
| 5D***56 | Fan Group-Defrosting | 1 |
4k8034 Flood Lamp Assembly--12 Volt
| 4K***34 | Flood Lamp Assembly | 1 |
2m856 Flood Lamp Assembly--12 Volt--Type 2
| 2M***56 | Flood Lamp Assembly | 1 |
2m856 Flood Lamp Assembly--12 Volt--Type 1
| 2M***56 | Flood Lamp Assembly | 1 |
Flywheel (7s7822 N/S)
| 7S***22 | Flywheel | 1 |
Flywheel (1s9913 N/S)
| 1S***13 | Flywheel | 1 |
6k2642 Front Hydraulic Lines Group--Type 2
| 6K***42 | Front Hydraulic Lines Group | 1 |
6k2642 Front Hydraulic Lines Group--Type 1
| 6K***42 | Front Hydraulic Lines Group | 1 |
5k4900 Front Hydraulic Lines Group--Part 2 Of 2
| 5K***00 | Front Hydraulic Lines Group | 1 |
5k4900 Front Hydraulic Lines Group--Part 1 Of 2
| 5K***00 | Front Hydraulic Lines Group | 1 |
5k4813 Front Lighting Group--12 Volt--As Viewed From Right Hand Side Of Machine
| 5K***13 | Front Lighting Group | 1 |
Fuel System (2s8019 N/S)
| 2S***19 | Fuel System | 1 |
5k9550 General Purpose Bucket Assembly
| 5K***50 | General Purpose Bucket Assembly | 1 |
1m6058 Generator Assembly--12 Volt, 40 Ampere
| 1M***58 | Generator Assembly | 1 |
4s6447 Generator Group--12 Volt, 40 Ampere
| 4S***47 | Generator Group | 1 |
8f9866 Grease Gun
| 8F***66 | Grease Gun As | 1 |
5k4894 Harness Assembly
| 5K***94 | Harness Assembly | 1 |
6k2070 Harness Assembly
| 6K***70 | Harness Assembly | 1 |
6k2021 Harness Assembly
| 6K***21 | Harness Assembly | 1 |
6k2071 Harness Assembly
| 6K***71 | Harness Assembly | 1 |
6k2074 Harness Assembly
| 6K***74 | Harness Assembly | 1 |
6k1200 Heater Group--12 Volt
| 6K***00 | Heater Group | 1 |
6k1201 Heater Group--24 Volt--Type 2
| 6K***01 | Heater Group | 1 |
6k1201 Heater Group--24 Volt--Type 1
| 6K***01 | Heater Group | 1 |
3k9066 Heater--12 Volt
| 3K***66 | Hot Water Heater | 1 |
5h1526 Heater--24 Volt
| 5H***26 | Hot Water Heater Group | 1 |
5k7703 Hydraulic Control Arrangement 3 Valve--For Use With Front Mounted Attachments
| 5J***43 | Hydraulic Tank And Valve Group | 1 |
| 5K***00 | Front Hydraulic Lines Group | 1 |
| 5K***65 | Hydraulic Hand Control Group | 1 |
5k7706 Hydraulic Control Arrangement 3 Valve--For Use With Rear Mounted Attachments
| 5J***43 | Hydraulic Tank And Valve Group | 1 |
| 5K***65 | Hydraulic Hand Control Group | 1 |
| 5K***00 | Rear Hydraulic Lines Group | 1 |
5j156 Cylinder Group--5.50" Bore X 19" Stroke--Type 1
| 5J***56 | Hydraulic Cylinder Group; Cylinder Group | 1 |
5j156 Cylinder Group--5.50" Bore X 19" Stroke--Type 3
| 5J***56 | Hydraulic Cylinder Group; Cylinder Group | 1 |
5j156 Cylinder Group (Change 4)--5.50" Bore X 19" Stroke--Type 2
| 5J***56 | Hydraulic Cylinder Group; Cylinder Group | 1 |
5k5065 Hydraulic Valve Control Group
| 5K***65 | Hydraulic Hand Control Group | 1 |
6k5639 Hydraulic Lines Group
| 6K***39 | Hydraulic Lines Group | 1 |
5k9396 Hydraulic Lines Group--As Viewed From Front Right Hand Side Of Machine--Type 1
| 5K***96 | Hydraulic Lines Group | 1 |
6k7256 Front Hydraulic Lines Group--Part 2 Of 2
| 6K***56 | Hydraulic Lines Group; Hydraulic Lines Group Front | 1 |
6k7256 Front Hydraulic Lines Group--Part 1 Of 2
| 6K***56 | Hydraulic Lines Group; Hydraulic Lines Group Front | 1 |
6k1000 Hydraulic Lines Group
| 6K***00 | Hydraulic Lines Group | 1 |
5k9396 Hydraulic Lines Group--As Viewed From Front Right Hand Side Of Machine--Type 2
| 5K***96 | Hydraulic Lines Group | 1 |
5j5443 Hydraulic Tank And Valve Group--Part 3 Of 4--Type 3
| 5J***43 | Hydraulic Tank And Valve Group | 1 |
5j5443 Hydraulic Tank And Valve Group--Part 1 Of 4--Type 1
| 5J***43 | Hydraulic Tank And Valve Group | 1 |
5j5443 Hydraulic Tank And Valve Group--Part 3 Of 4--Type 1
| 5J***43 | Hydraulic Tank And Valve Group | 1 |
5j5443 Hydraulic Tank And Valve Group--Part 2 Of 4--Type 3
| 5J***43 | Hydraulic Tank And Valve Group | 1 |
5j5443 Hydraulic Tank And Valve Group--Part 1 Of 4--Type 2
| 5J***43 | Hydraulic Tank And Valve Group | 1 |
5j5443 Hydraulic Tank And Valve Group--Part 1 Of 4--Type 3
| 5J***43 | Hydraulic Tank And Valve Group | 1 |
5j5443 Hydraulic Tank And Valve Group--Part 4 Of 4--Type 2
| 5J***43 | Hydraulic Tank And Valve Group | 1 |
5j5443 Hydraulic Tank And Valve Group--Part 2 Of 4--Type 1
| 5J***43 | Hydraulic Tank And Valve Group | 1 |
5j5443 Hydraulic Tank And Valve Group--Part 4 Of 4--Type 1
| 5J***43 | Hydraulic Tank And Valve Group | 1 |
5j5443 Hydraulic Tank And Valve Group--Part 4 Of 4--Type 3
| 5J***43 | Hydraulic Tank And Valve Group | 1 |
5j5443 Hydraulic Tank And Valve Group--Part 3 Of 4--Type 2
| 5J***43 | Hydraulic Tank And Valve Group | 1 |
5j5443 Hydraulic Tank And Valve Group--Part 2 Of 4--Type 2
| 5J***43 | Hydraulic Tank And Valve Group | 1 |
8m2577 Ignition System Group
| 8M***77 | Ignition System Group | 1 |
5j4707 Internal Auxiliary Valve Group
| 5J***07 | Internal Auxiliary Valve Group | 1 |
4k4895 Swivel Joint Group
| 4K***95 | Joint Group-Swivel | 1 |
6k1203 Cab Lighting System Group--24 Volt
| 6K***03 | Lighting Group-Cab; System Gp-Cab Lighting | 1 |
5k6019 Log Fork Arrangement
| 4J***45 | Cylinder Group; Cylinder Group | 2 |
| 5K***19 | Log Fork Arrangement | 1 |
| 5K***20 | Carriage And Clamp Group | 1 |
6k4740 Log Fork Arrangement
6j4515 Cylinder Group--5" Bore X 23.88" Stroke--2 Required
| 6J***15 | Log Fork Cylinder Group; Cylinder Group | 1 |
5k7180 Logging Arrangement
| 5K***62 | Rim Group | 4 |
| 5K***19 | Log Fork Arrangement | 1 |
| 5K***25 | Counterweight Group | 1 |
6k5734 Logging Arrangement
| 0S***85 | Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine | 4 |
| 1D***19 | Nut-Retainer To Fan Bracket Assembly | 4 |
| 3B***08 | Lockwasher Handrails To Dash | 4 |
1s3351 Magneto Assembly
| 1S***51 | Magneto Assembly | 1 |
3s2986 Magneto Assembly
| 3S***86 | Magneto Assembly | 1 |
6k7960 Rear View Mirror Group
| 6K***60 | Mirror Group | 1 |
6k2010 Mirror Group
| 6K***10 | Mirror Group | 1 |
6k4781 Mirror Group
| 6K***81 | Mirror Group | 1 |
Name Plates And Transfers
| 2M***31 | Plate; Serial Number On R.H. Side Of Cylinder Block And R.H. Side Of Loader Frame | 2 |
| 3K***09 | Plate; Bucket Lever Beside Control Console Near Lift Lever | 1 |
| 3K***12 | Film-Fuel Instruction; (On Front Guard To The Left And Centered With Fuel Filler Cap) | 1 |
3s2364 Oil Pump Group
| 3S***64 | Oil Pump Group | 1 |
2s2787 Protection Cap Group--Starting Engine Fuel Tank
| 2S***87 | Protection Cap Group | 1 |
5s8033 Protection Cover Group--Fuel Tank Cap
| 5S***33 | Protection Cover Group | 1 |
1s6307 Protection Cover Group--Fuel Tank Cap
| 1S***07 | Protection Cover Group | 1 |
1s4153 Rain Cap Group--Starting Engine
| 1S***53 | Rain Cap Group | 1 |
5k5900 Rear Hydraulic Lines Group
| 5K***00 | Rear Hydraulic Lines Group | 1 |
5k4812 Rear Lighting Group--12 Volt
| 5K***12 | Rear Lighting Group | 1 |
6j4409 Relief Valve Group--Type 2
| 6J***09 | Relief Valve Group | 1 |
6j4409 Relief Valve Group--Type 1
| 6J***09 | Relief Valve Group | 1 |
Replacement Parts For Chain Armor
5k4862 Rim Group--29.50 X 25 Tubeless Tires--4 Required
| 5K***62 | Rim Group | 1 |
5k4691 Rim Group--26.50 X 25 Tubeless Tires--4 Required
| 5K***91 | Rim Group | 1 |
5k445 Ripper-Scarifier Group--Type 1
| 5K***45 | Ripper Ar-Basic; Ripper--Scarifier Group | 1 |
5k445 Ripper-Scarifier Group--Type 2
| 5K***45 | Ripper Ar-Basic; Ripper--Scarifier Group | 1 |
5k7477 Ripper Mounting Group--Type 2
| 5K***77 | Ripper Mounting Group | 1 |
5k7477 Ripper Mounting Group--Type 1
| 5K***77 | Ripper Mounting Group | 1 |
5k447 Ripper Tooth Group
| 5K***47 | Ripper Tooth Group | 1 |
7k1027 Rock Bucket Group--4.50 Cubic Yard--126" Wide
| 7K***27 | Rock Bucket Group | 1 |
5k448 Scarifier Tooth Group
| 5K***48 | Scarifier Tooth Group | 1 |
7k5547 Seat Assembly
| 7K***47 | Seat Assembly | 1 |
7k8573 Seat Group
| 7K***73 | Seat Group | 1 |
9k682 Shaft And Link Assembly
| 9K***82 | Shaft & Link As | 1 |
6k5849 Side Plate Group--Rock Bucket
| 6K***49 | Side Plate Group | 1 |
6k5868 Spill Plate Extension Group
| 6K***68 | Spill Plate Extension Group | 1 |
5k3753 Spill Plate Extension Group
| 5K***53 | Spill Plate Extension Group | 1 |
5k5040 Spill Plate Extension Group
| 5K***40 | Spill Plate Extension Group | 1 |
1s5943 Starter Pinion Group
| 1S***43 | Starter Pinion Group | 1 |
2s6639 Starting Engine Arrangement
| 1S***38 | Clutch Group | 1 |
| 1S***43 | Starter Pinion Group | 1 |
| 2S***32 | Water Lines Group | 1 |
Support (3s2353 N/S)
| 3S***53 | Support | 1 |
8m9319 Tail Lamp Assembly--12 Volt
| 8M***19 | Tail Lamp Assembly | 1 |
Tire Chain Armor Arrangements
6k6396 Tire Inflating Group
| 6K***96 | Tire Inflating Group | 1 |
8m9864 Tool Group
| 8M***64 | Tool Group | 1 |
5s2934 Tool Group
| 5S***34 | Tool Group | 1 |
9s7978 Tool Group
| 9S***78 | Tool Group-Hand | 1 |
4k7351 Tooth Group--Long Tip
| 4K***51 | Tooth Group | 1 |
6k8530 Tooth Group--Rock Bucket--Field Installation
| 6K***30 | Tooth Group | 1 |
5k7584 Tooth Group--Short Tip
| 5K***84 | Tooth Group | 1 |
4k9377 Tooth Group--Long Tip
| 4K***77 | Tooth Group | 1 |
5k7583 Tooth Group--Short Tip
| 5K***83 | Tooth Group | 1 |
5k8210 Transmission Guard Group--Top View
| 5K***10 | Tractor Guard Group | 1 |
2s6632 Water Lines Group
| 2S***32 | Water Lines Group | 1 |
7k729 Window Assembly
| 7K***29 | Window Assembly | 1 |
6k1210 Windshield Washer Group
| 6K***10 | Windshield Washer Group | 1 |
6k1206 Windshield Wiper And Washer Group--12 Volt
| 6K***06 | Windshield Wiper And Washer Group | 1 |
| 6K***09 | Windshield Wiper Group | 1 |
| 6K***10 | Windshield Washer Group | 1 |
6k1207 Windshield Wiper And Washer Group--24 Volt
| 6K***07 | Windshield Wiper And Washer Group | 1 |
| 6K***08 | Windshield Wiper Group | 1 |
| 6K***10 | Windshield Washer Group | 1 |
6k1663 Wiper Assembly--24 Volt
| 6K***63 | Windshield Wiper Assembly | 1 |
6k1208 Windshield Wiper Group--24 Volt--Type 1
| 6K***08 | Windshield Wiper Group | 1 |
1v4594 Windshield Wiper Group--12 Volt--Field Installation
| 1V***94 | Windshield Wiper Group | 1 |
6k1208 Windshield Wiper Group--24 Volt--Type 2
| 6K***08 | Windshield Wiper Group | 1 |
9k1237 Windshield Wiper Assembly
| 9K***37 | Windshield Wiper Group | 1 |
6k1209 Windshield Wiper Group--12 Volt--Type 2
| 6K***09 | Windshield Wiper Group | 1 |
6k1208 Windshield Wiper Group--24 Volt--Type 3
| 6K***08 | Windshield Wiper Group | 1 |
6k1209 Windshield Wiper Group--12 Volt--Type 1
| 6K***09 | Windshield Wiper Group | 1 |
9k1236 Wiper Assembly--12 Volt
| 9K***36 | Wiper Assembly | 1 |
6k1662 Wiper Assembly--12 Volt
| 6K***62 | Wiper Assembly | 1 |
1v4358 Basic Wiper Group--24 Volt
| 1V***58 | Wiper Group; Basic Wiper Group | 1 |
1v4635 Windshield Wiper Group
| 1V***35 | Wiper Group-Windshield; Windshield Wiper Group | 1 |
1v5708 Wiper Service Group--Field Installation
| 1V***35 | Wiper Group-Windshield; Windshield Wiper Group | 1 |
| 1V***08 | Wiper Service Group | 1 |
| 4L***16 | Terminal (Dark Blue And Dark Green Wire) | 4 |
Wiring Diagram--12 Volt System
Diesel Engine
Air Cleaner (5k5098 N/S)
| 5K***98 | Air Cleaner | 1 |
2s2764 Air Compressor Assembly
| 2S***64 | Air Compressor Assembly | 1 |
1p5013 Air Compressor Assembly--Field Installation
| 1P***13 | Air Compressor Group | 1 |
7m914 Air Filter Indicator Group
| 7M***14 | Air Filter Service Indicator Group | 1 |
Balancer (7s6282 N/S)
| 7S***82 | Balancer | 1 |
Balancer (2s3114 N/S)
| 2S***14 | Balancer | 1 |
Battery And Wiring (5k4430 N/S)--24 Volt--Top View Part 2 Of 2
| 5K***30 | Battery And Wiring | 1 |
Battery And Wiring (5k4430 N/S)--24 Volt--As Viewed From Right Hand Side Of Machine Part 1 Of 2
| 5K***30 | Battery And Wiring | 1 |
Blower Fan And Drive (3s7655 N/S)
| 3S***55 | Blower Fan And Drive Group | 1 |
Breather (1s5073 N/S)
| 1S***73 | Breather Group | 1 |
Camshaft (3s534 N/S)--Part 1 Of 2
| 3S***34 | Camshaft | 1 |
Camshaft (3s534 N/S)--Part 2 Of 2
| 3S***34 | Camshaft | 1 |
Camshaft Drive (5s9888 N/S)
| 5S***88 | Camshaft Drive | 1 |
Camshaft Drive (1s9900 N/S)
| 1S***00 | Camshaft Drive | 1 |
Air Compressor (2s6640 N/S)--Field Installation
| 2S***40 | Compressor Group | 1 |
Air Compressor (2s6640 N/S)
| 2S***40 | Compressor Group | 1 |
Connecting Rod And Piston (1s8643 N/S)--8 Required
| 1S***43 | Connecting Rod And Piston | 1 |
Crankshaft (1s8637 N/S)
| 1S***37 | Crankshaft | 1 |
Crankshaft (5s555 N/S)
| 5S***55 | Crankshaft | 1 |
Crankshaft Bearing Replacement Groups
9s648 Crankshaft Gear Group--Field Installation
| 9S***48 | Crankshaft Gear Group | 1 |
9s646 Crankshaft Service Group--Field Installation
| 9S***46 | Crankshaft Group | 1 |
Cylinder Block And Covers (2s6617 N/S)--Rear View--Part 3 Of 3
| 2S***17 | Cylinder Block And Covers Group | 1 |
Cylinder Block And Covers (7s3157 N/S)--Front View--Part 2 Of 3
| 7S***57 | Cylinder Block And Covers Group | 1 |
Cylinder Block And Covers (2s6617 N/S)--Front View--Part 2 Of 3
| 2S***17 | Cylinder Block And Covers Group | 1 |
Cylinder Block And Covers (2s6617 N/S)--Side View--Part 1 Of 3
| 2S***17 | Cylinder Block And Covers Group | 1 |
Cylinder Block And Covers (7s3157 N/S)--Side View--Part 1 Of 3
| 7S***57 | Cylinder Block And Covers Group | 1 |
Cylinder Block And Covers (7s3157 N/S)--Rear View--Part 3 Of 3
| 7S***57 | Cylinder Block And Covers Group | 1 |
Cylinder Block Assembly (2s2863 N/S)
| 2S***63 | Cylinder Block Assembly | 1 |
Cylinder Block Assembly (7s501 N/S)
| 7S***01 | Cylinder Block Assembly | 1 |
Cylinder Head And Valve Mechanism (7s2520 N/S)
| 7S***20 | Cylinder Head And Valve Mechanism | 1 |
Cylinder Head And Valve Mechanism (9l3035 N/S)
| 9L***35 | Cylinder Head And Valve Mechanism Group | 1 |
Drive Hub And Damper (3s7656 N/S)
| 3S***56 | Drive Hub And Damper Group | 1 |
1s8658 Electric Starter Group--24 Volt
| 1S***58 | Electric Starter Group | 1 |
3s8473 Electric Starting Motor Assembly--24 Volt--Part 2 Of 3
| 3S***73 | Electric Starting Motor Assembly | 1 |
3s8473 Electric Starting Motor Assembly--24 Volt--Part 3 Of 3
| 3S***73 | Electric Starting Motor Assembly | 1 |
3s8473 Electric Starting Motor Assembly--24 Volt--Part 1 Of 3
| 3S***73 | Electric Starting Motor Assembly | 1 |
Exhaust Extension (3s9237 N/S)
| 3S***37 | Exhaust Extension; (22.5°) | 1 |
4s7872 Fan Drive Clutch Assembly
| 4S***72 | Fan Drive Clutch Assembly | 1 |
1p1256 Fan Drive Group--Field Installation
| 1P***56 | Fan Drive Group | 1 |
Fan Guard (2s6641 N/S)
| 2S***41 | Fan Guard | 1 |
8h7204 Fuel Filter Group
| 8H***04 | Filter Group-Fuel | 1 |
4k8033 Flood Lamp Assembly--24 Volt
| 4K***33 | Flood Lamp Assembly | 1 |
Flywheel (1s8939 N/S)
| 1S***39 | Flywheel | 1 |
Flywheel (7s7819 N/S)
| 7S***19 | Flywheel Group | 1 |
Front Lighting System (5k4814 N/S)--24 Volt--As Viewed From Right Hand Side Of Machine
| 5K***14 | Front Lighting System | 1 |
Fuel Filter (2s6626 N/S)--Part 2 Of 2
| 2S***26 | Fuel Filter | 1 |
Fuel Filter (2s6626 N/S)--Part 1 Of 2
| 2S***26 | Fuel Filter | 1 |
Fuel Injection Valves And Lines (4s5495 N/S)
| 4S***95 | Fuel Injection Valves And Lines | 1 |
Fuel Priming Pump (2s6633 N/S)
| 2S***33 | Fuel Priming Pump | 1 |
Fuel Pump Housing And Governor (3s8347 N/S)
| 3S***47 | Fuel Pump Housing And Governor | 1 |
5s6681 Fuel Pump Housing Group--Part 1 Of 2--Type 2
| 5S***81 | Fuel Pump Housing Group | 1 |
5s6681 Fuel Pump Housing Group--Part 2 Of 2--Type 3
| 5S***81 | Fuel Pump Housing Group | 1 |
5s6681 Fuel Pump Housing Group--Part 1 Of 2--Type 3
| 5S***81 | Fuel Pump Housing Group | 1 |
5s6681 Fuel Pump Housing Group--Part 1 Of 2--Type 1
| 5S***81 | Fuel Pump Housing Group | 1 |
5s6681 Fuel Pump Housing Group--Part 2 Of 2--Type 2
| 5S***81 | Fuel Pump Housing Group | 1 |
5s6681 Fuel Pump Housing Group--Part 2 Of 2--Type 1
| 5S***81 | Fuel Pump Housing Group | 1 |
Fuel Ratio Control (5s7184 N/S)
| 5S***84 | Fuel Ratio Control | 1 |
Fuel Transfer Pump (3s9589 N/S)
| 3S***89 | Fuel Transfer Pump | 1 |
4s6410 Fuel Transfer Pump Group
| 4S***10 | Fuel Transfer Pump Group | 1 |
Gasket Kits
| 5P***27 | Diesel Engine Complete | 0 |
| 5P***28 | Seal .46 M(18.10 In.) | 0 |
| 7S***20 | Water Pump | 0 |
Generator (4s5717 N/S)--24 Volt, 20 Ampere
| 4S***17 | Generator | 1 |
4m9102 Generator Assembly--24 Volt, 20 Ampere
| 4M***02 | Generator Assembly | 1 |
1s8659 Glow Plug And Wiring Group
| 1S***59 | Glow Plug And Wiring Group | 1 |
Governor Control (5k5100 N/S)
| 5K***00 | Governor Control | 1 |
5s9645 Governor Group--Sectional View Of Housing--Part 3 Of 3
| 5S***45 | Governor Group | 1 |
5s3030 Governor Group--Top View--Part 1 Of 2--Type 1
| 5S***30 | Governor Group | 1 |
5s3030 Governor Group--Side View--Part 2 Of 2--Type 1
| 5S***30 | Governor Group | 1 |
5s3030 Governor Group--Top View--Part 1 Of 2--Type 3--Field Installation
| 5S***30 | Governor Group | 1 |
5s9645 Governor Group--Top View--Part 1 Of 3
| 5S***45 | Governor Group | 1 |
5s3030 Governor Group--Side View--Part 2 Of 2--Type 3--Field Installation
| 5S***30 | Governor Group | 1 |
5s3030 Governor Group--Top View--Type 2--Field Installation--Part 1 Of 2
| 5S***30 | Governor Group | 1 |
5s3030 Governor Group--Side View--Part 2 Of 2--Type 2--Field Installation
| 5S***30 | Governor Group | 1 |
5s9645 Governor Group--Side View--Part 2 Of 3
| 5S***45 | Governor Group | 1 |
5k5025 Harness Assembly
| 5K***25 | Harness Assembly | 1 |
5k9692 Harness Assembly
| 5K***92 | Harness Assembly | 1 |
7m7147 Combination Stop And Tail Lamp Assembly
| 7M***47 | Lamp As-Stop & Tail | 1 |
1m3387 Dash Lamp Assembly--24 Volt
| 1M***87 | Lamp Group | 1 |
1m1882 Flood Lamp Assembly--24 Volt--Type 2
| 1M***82 | Lamp Group | 1 |
1m1882 Flood Lamp Assembly--24 Volt--Type 1
| 1M***82 | Lamp Group | 1 |
Manifolds (2s6621 N/S)
| 2S***21 | Manifolds | 1 |
Oil Cooler Lines (6k1845 N/S)
| 6K***45 | Oil Cooler Lines Group | 1 |
1s5132 Oil Filter Assembly (1s5131 N/S)
| 1S***32 | Oil Filter Assembly | 1 |
Oil Lines (2s6628 N/S)
| 2S***28 | Oil Lines | 1 |
Oil Pump And Drive (1s8653 N/S)
| 1S***53 | Oil Pump And Drive | 1 |
1s9523 Oil Pump Assembly
| 1S***23 | Oil Pump Assembly | 1 |
Primary Fuel Filter And Lines (2s6627 N/S)
| 2S***27 | Primary Fuel Filter And Lines | 1 |
2s308 Pump Assembly
| 2S***08 | Pump As-Fuel Priming | 1 |
Radiator And Hydraulic Oil Cooler (2s6636 N/S)--Rear View Part 1 Of 2
| 2S***36 | Radiator And Hydraulic Oil Cooler | 1 |
Radiator And Hydraulic Oil Cooler (2s6636 N/S)--Side View Part 2 Of 2
| 2S***36 | Radiator And Hydraulic Oil Cooler | 1 |
Rear Lighting System (5k4811 N/S)--24 Volt
| 5K***11 | Rear Lighting System | 1 |
2s4228 Service Meter Group (2s6630 N/S)
| 2S***28 | Service Meter Group | 1 |
2s9519 Rack Stop
| 2S***19 | Stop Group-Rack | 1 |
7h7290 Disconnect Switch Assembly
| 7H***90 | Switch As-Disconnect | 1 |
3k1650 Light Switch Assembly
| 3K***50 | Switch As-Light; -Floodlights | 1 |
4m1812 Solenoid Switch Assembly
| 4M***12 | Switch As-Solenoid | 1 |
8s4988 Turbocharger Assembly (2s6620 N/S)
| 8S***88 | Turbocharger Assembly | 1 |
7s6702 Turbocharger Assembly (2s6620 N/S)
| 7S***02 | Turbocharger Assembly | 1 |
3s8308 Turbocharger Assembly (2s6620 N/S)
| 3S***08 | Turbocharger Assembly | 1 |
Water Lines, Torque Converter & Engine Oil Cooler (2s6629 N/S)--Part 1 Of 2
| 2S***29 | Water Lines, Torque Converter & Engine Oil Cooler | 1 |
Water Lines, Torque Converter & Engine Oil Cooler (2s6629 N/S)--Part 2 Of 2
| 2S***29 | Water Lines, Torque Converter & Engine Oil Cooler | 1 |
5s1912 Water Pump Assembly--Type 2
| 5S***12 | Water Pump Assembly | 1 |
5s1912 Water Pump Assembly--Type 1
| 5S***12 | Water Pump Assembly | 1 |
Wiring Diagram--24 Volt System
Hydraulic Control
7j3776 Body Group--Field Installation
| 7J***76 | Body Group | 1 |
5j4708 Control Valve Group--Part 2 Of 2
| 5J***08 | Control Valve Group | 1 |
5j4708 Control Valve Group--Part 1 Of 2
| 5J***08 | Control Valve Group | 1 |
5j5441 Filler And Mounting Group
| 5J***41 | Filler Tube And Tank Mounting Group | 1 |
Hand Control (5k4129 N/S)
| 5K***29 | Hydraulic Hand Control Group | 1 |
6j1443 Hydraulic Oil Filter Group--Type 1
| 6J***43 | Hydraulic Oil Filter Group | 1 |
6j1443 Hydraulic Oil Filter Group--Type 2
| 6J***43 | Hydraulic Oil Filter Group | 1 |
Hydraulic Pump And Lines (5k5207 N/S)
| 5K***07 | Hydraulic Pump And Lines | 1 |
5j4959 Hydraulic Pump Assembly
| 5J***59 | Hydraulic Pump Assembly | 1 |
Hydraulic Tank And Valve (5j5442 N/S)--Part 2 Of 4
| 5J***42 | Hydraulic Tank And Valve | 1 |
Hydraulic Tank And Valve (5j5442 N/S)--Part 4 Of 4
| 5J***42 | Hydraulic Tank And Valve | 1 |
Hydraulic Tank And Valve (5j5442 N/S)--Part 3 Of 4
| 5J***42 | Hydraulic Tank And Valve | 1 |
Hydraulic Tank And Valve (5j5442 N/S)--Part 1 Of 4
| 5J***42 | Hydraulic Tank And Valve | 1 |
5j4508 Relief Valve Group--Type 1
| 5J***08 | Relief Valve Group | 1 |
6j1687 Relief Valve Group
| 6J***87 | Relief Valve Group | 1 |
5j4508 Relief Valve Group--Type 2
| 5J***08 | Relief Valve Group | 1 |
5j4508 Relief Valve Group
| 5J***08 | Relief Valve Group | 1 |
Tank Guard (5k4248 N/S)
| 5K***48 | Tank Guard | 1 |
6j7184 Tilt Relief Valve Group
| 6J***84 | Tilt Relief Valve Group | 1 |
6j2781 Tilt Relief Valve Group
| 6J***81 | Tilt Relief Valve Group | 1 |
5j3644 Tilt Relief Valve Group
| 5J***44 | Tilt Relief Valve Group | 1 |
3j8878 Tilt Relief Valve Group
| 3J***78 | Tilt Relief Valve Group | 1 |
6k2782 Tilt Relief Valve Group
| 6K***82 | Tilt Relief Valve Group | 1 |
Transmission And Chassis
Air And Brake Control (5k80 N/S)
| 5K***80 | Air And Brake Control | 1 |
Air Manifold, Valve And Lines
Air Tanks, Valves And Lines
5k4581 Brake Assembly
| 5K***81 | Brake Assembly | 1 |
5k9120 Brake Chamber Assembly
| 5K***20 | Brake Chamber Assembly | 1 |
5k9144 Brake Chamber Assembly
| 5K***44 | Brake Chamber Assembly | 1 |
Brake Pedals, Horn, Control Valves And Lines
5k5121 Control Valve Assembly
| 5K***21 | Control Valve Assembly | 1 |
5k3584 Differential Group
| 5K***84 | Differential Group | 1 |
6k8381 Differential Group
| 6K***81 | Differential Group | 1 |
5k4742 Dipstick And Oil Filler Spout Group
| 5K***42 | Dipstick And Oil Filler Spout | 1 |
Drawbar (5k4903 N/S)
| 5K***03 | Drawbar | 1 |
7k4340 Drawbar Assembly
| 7K***40 | Drawbar Assembly | 1 |
Drive Shafts (5k4347 N/S)--Part 2 Of 2
| 5K***47 | Drive Shaft Group | 1 |
Drive Shafts (5k4347 N/S)--Part 1 Of 2
| 5K***47 | Drive Shaft Group | 1 |
Fenders (5k4652 N/S)
| 5K***52 | Fender Group | 1 |
Final Drive And Wheel (5k4626 N/S)--4 Required
| 5K***26 | Final Drive And Wheels | 1 |
Front And Rear Differential And Carrier (5k3580 N/S & 5k3581 N/S)
| 5K***80 | Front And Rear Differential And Carrier | 1 |
Front Brake And Axle (5k4291 N/S)
| 5K***91 | Front Brake And Axle | 1 |
Front Wheel Brake Chamber And Lines
Fuel System (5k4300 N/S)--Part 2 Of 2
| 5K***00 | Fuel System | 1 |
Fuel System (5k4300 N/S)--Part 1 Of 2
| 5K***00 | Fuel System | 1 |
5k4911 Gauges And Dash Group--Part 2 Of 2
| 5K***11 | Gauges And Dash Group | 1 |
5k4911 Gauges And Dash Group--Top View--Part 1 Of 2
| 5K***11 | Gauges And Dash Group | 1 |
Hood And Guard (5k4852 N/S)
| 5K***52 | Hood And Guard | 1 |
5d6998 Air Horn Assembly
| 5D***98 | Horn Group-Air | 1 |
5j4960 Hydraulic Pump Assembly
| 5J***60 | Hydraulic Pump Assembly | 1 |
Front Frame (5k4677 N/S)
| 5K***77 | Loader Frame Group | 1 |
6k5352 Park And Emergency Valve Assembly
| 6K***52 | Park And Emergency Valve Assembly | 1 |
Planetary Transmission (3s8000 N/S)--Part 3 Of 3
| 3S***00 | Planetary Transmission | 1 |
Planetary Transmission (3s8000 N/S)--Part 2 Of 3
| 3S***00 | Planetary Transmission | 1 |
Planetary Transmission (3s8000 N/S)--Part 1 Of 3
| 3S***00 | Planetary Transmission | 1 |
Platform (5k4053 N/S)
| 5K***53 | Platform | 1 |
Platform Support (5k4877 N/S)
| 5K***77 | Platform Support | 1 |
3s8099 Pressure Control Group
| 3S***99 | Pressure Control Group | 1 |
5k4608 Pump Drive Group--Part 2 Of 2
| 5K***08 | Pump Drive Group | 1 |
5k4608 Pump Drive Group--Part 1 Of 2
| 5K***08 | Pump Drive Group | 1 |
Pump, Filter And Manifold (3s8105 N/S)
| 3S***05 | Pump, Filter And Manifold Group | 1 |
Rear Brake And Axle (5k4292 N/S)
| 5K***92 | Rear Brake And Axle | 1 |
Rear Frame (5k3505 N/S)--Part 2 Of 2
| 5K***05 | Rear Frame | 1 |
Rear Frame (5k3505 N/S)--Part 1 Of 2
| 5K***05 | Rear Frame | 1 |
Rear Wheel Brake Chamber And Lines
Rim (5k4861 N/S)--23.50 X 25 Tubeless Tires--4 Required
| 5K***61 | Rim Group | 1 |
3k8461 Seat Assembly
| 3K***61 | Seat Group; Basic Seat Group--Static | 1 |
Seat (5k2061 N/S)
| 5K***61 | Seat Group | 1 |
3s8098 Selector Valve Group
| 3S***98 | Selector Valve Group | 1 |
5j2628 Steering Cylinder Group--L.H.--4.50" Bore X 10.50" Stroke
| 5J***28 | Steering Cylinder Group | 1 |
5j2627 Steering Cylinder Group--R.H.--4.50" Bore X 10.50" Stroke
| 5J***27 | Steering Cylinder Group | 1 |
Steering Gear And Mechanism (5k4740 N/S) Part 2 Of 2
| 5K***40 | Steering Gear And Mechanism Group | 1 |
Steering Gear And Mechanism (5k4740 N/S)--As Viewed From Right Hand Side Of Machine Part 1 Of 2
| 5K***40 | Steering Gear And Mechanism Group | 1 |
Steering Valve And Lines (5k4400 N/S)--Top View--Part 2 Of 2
| 5K***00 | Steering Valve And Lines | 1 |
Steering Valve And Lines (5k4400 N/S)--Top View--Part 1 Of 2
| 5K***00 | Steering Valve And Lines | 1 |
5j3450 Steering Valve Group
| 5J***50 | Steering Valve Group | 1 |
Torque Converter Cooler Lines (5k4105 N/S)
| 5K***05 | Torque Converter Cooler Lines | 1 |
1t835 Torque Converter Group
| 1T***35 | Torque Converter Group | 1 |
1t830 Torque Converter Group
| 1T***30 | Torque Converter Group | 1 |
1t707 Torque Converter Group
| 1T***07 | Torque Converter Group | 1 |
Transfer Gears (3s8003 N/S)--As Viewed From Right Hand Side Of Machine--Part 2 Of 2
| 3S***03 | Transfer Gear | 1 |
Transfer Gears (3s8003 N/S)--As Viewed From Front Of Machine--Part 1 Of 2
| 3S***03 | Transfer Gear | 1 |
7s8500 Transmission Arrangement
| 7S***00 | Transmission Arrangement | 1 |
Transmission Control (5k3966 N/S)
| 5K***66 | Transmission Control | 1 |
3s8050 Transmission Oil Filter And Screen Group
| 3S***50 | Transmission Filter And Screen Group | 1 |
3s8002 Transmission Group--As Viewed From R.H. Side Of Machine
| 3S***02 | Transmission Group | 1 |
Transmission Hydraulic Control (3s8100 N/S)--Part 1 Of 2
| 3S***00 | Transmission Hydraulic Control Group | 1 |
Transmission Hydraulic Control (3s8100 N/S)--Part 2 Of 2
| 3S***00 | Transmission Hydraulic Control Group | 1 |
2s1350 Transmission Pump Group
| 2S***50 | Transmission Pump Group | 1 |
1s8754 Universal Joint Assembly
| 1S***54 | Universal Joint Group | 1 |
4d2287 Valve Assembly
| 4D***87 | Valve As; -Parking, Service | 1 |
2r617 Foot Control Valve Assembly
| 2R***17 | Valve As-Brake Foot Control | 1 |
3d9943 Horn Valve
| 3D***43 | Valve As-Horn | 1 |
9j8193 Basic Vane Pump Group--Field Installation
| 9J***93 | Vane Pump Group | 1 |
Wheel Loader
Bucket Control (5k4714 N/S)
| 5K***14 | Bucket Control Group | 1 |
Bucket Positioner And Indicator (5k5094 N/S)--As Viewed From Right Hand Side Of Machine--Part 1 Of 2
| 5K***94 | Bucket Positioner And Indicator Group | 1 |
Bucket Positioner And Indicator (5k5094 N/S)--As Viewed From Right Hand Side Of Machine--Part 2 Of 2
| 5K***94 | Bucket Positioner And Indicator Group | 1 |
7k4051 Cam Group
| 7K***51 | Cam Group | 1 |
7j9953 Cylinder And Seal Group--6.50" Bore X 39.37" Stroke--2 Required--Field Installation
| 7J***53 | Cylinder And Seal Group | 1 |
7j9952 Cylinder Group--(Change 3 & 4)--165.1 Mm (6.50 In.) Bore X 999.9 Mm (39.37 In.) Stroke--2 Required
| 7J***52 | Cylinder Group | 1 |
5j4556 Tilt Cylinder Group--L.H.--5.50" Bore X 32.80" Stroke
| 5J***56 | Cylinder Group-Tilt | 1 |
5j7170 External Kickout Valve Group
| 5J***70 | External Kickout Valve Group | 1 |
Bucket Kickout (5k4882 N/S)
| 5K***82 | Kickout Group | 1 |
6k9943 Lift Arm And Pin Repair Group--Field Installation
| 6K***43 | Lift Arm Pin Repair Group | 1 |
7j2356 Lift Cylinder--6.50" Bore X 39.37" Stroke--2 Required
| 7J***56 | Lift Cylinder | 1 |
5j3505 Lift Cylinder Group--6.50" Bore X 39.37" Stroke--2 Required
| 5J***05 | Lift Cylinder Group | 1 |
Lift Cylinder Lines (5k4898 N/S)--Part 2 Of 2
| 5K***98 | Lift Cylinder Lines | 1 |
Lift Cylinder Lines (5k4898 N/S)--Part 1 Of 2
| 5K***98 | Lift Cylinder Lines | 1 |
6j2401 Swivel Joint Group
| 6J***01 | Swivel Joint Group | 1 |
4k6614 Swivel Joint Group
| 4K***14 | Swivel Joint Group | 1 |
4k6615 Swivel Joint Group
| 4K***15 | Swivel Joint Group | 1 |
6j2216 Swivel Joint Group--Type 2
| 6J***16 | Swivel Joint Group | 1 |
6j2216 Swivel Joint Group--Type 1
| 6J***16 | Swivel Joint Group | 1 |
5j4555 Tilt Cylinder Group--R.H.--5.50" Bore X 32.80" Stroke
| 5J***55 | Tilt Cylinder Group | 1 |
Tilt Cylinder Lines (5k4899 N/S)--Part 1 Of 2
| 5K***99 | Tilt Cylinder Lines | 1 |
Tilt Cylinder Lines (5k4899 N/S)--Part 2 Of 2
| 5K***99 | Tilt Cylinder Lines | 1 |
980 serial number reference
On the 980, the serial/PIN plate is mounted on the right-hand side of the machine, at the base of the cab structure or on the front of the operator's platform near the access steps. Pre-2001 Cat machines carry a short serial number made of a 3-character prefix (identifies the model and build series) followed by a sequential unit number; later full 17-character PINs still embed that same 3-character prefix. Read the first three characters off the plate and match them to the model/series table before ordering parts, since the same numeric model designation can span more than one prefix across generations.
| Prefix | Identifies | Notes |
|---|---|---|
| 42H | Original 980 Wheel Loader (pre-980B, 1960s-early 1970s production) | Only PIN prefix documented for the base 980 across factory parts and service literature. Covers the full run, split into two parts-book print ranges: early units and a later supplement starting partway through the sequence. No separate later prefix found for the base model before it was replaced by the 980B generation. Exact introduction year and engine are not consistently documented in surviving listings for this range - verify engine fitment and build year with your dealer using the full plate number. |
Frequently asked questions
What engine powers the original Caterpillar 980 wheel loader?
This early 980 (PIN prefix 42H, built from 1966) uses a mechanically governed Caterpillar D336TA diesel — a 60-degree V8, turbocharged and aftercooled, rated 224 kW (300 hp) at the flywheel. The main engine is started by a separate gasoline pony motor with its own magneto ignition and carburetor. Caterpillar used this V8 in only one other machine, the J621 elevating scraper.
What is the operating weight of the original Cat 980?
An exact operating weight for this V8/pony-motor 980 (S/N 42H1 and up) is not documented in surviving public specification sheets. For comparison, its direct successor, the 980B with a Caterpillar 3306 engine, weighed roughly 23,400 kg (51,500 lb) in operating trim — treat that figure as a reference point for the later machine, not a confirmed number for this earlier V8 version.
What replaced the original Caterpillar 980?
The original V8/pony-motor 980 was replaced by the 980B around 1970, which switched to a Caterpillar 3306 inline-six engine and electric starting, dropping the pony motor and magneto entirely. The 980B then led the long-running lettered-generation line — 980C, F, F II, G, G II, and H — that carried the 980 name for decades. A modern, unrelated 2021-plus Next-Generation 980 with a Cat C13 engine also exists today, but it shares nothing mechanically with this early machine beyond the model number.
What 980 owners discuss
What's the real-world reputation of the D336 V8 that powers this loader, and is it worth relying on as-is?
Mixed to poor, and buyers should go in with eyes open. Community consensus on the original V8 is that it built a reputation as one of Caterpillar's more troublesome engines of that era - enough that Caterpillar later offered a factory procedure to repower the loader with an inline-six diesel (accounts point to both the 3306 and the 3406, so confirm which conversion, if any, is documented for your serial rather than assuming parts interchange). Where the V8 survives original, an odd rattle from the cam and gear train at idle is reported as characteristic rather than a fault - it quiets down just off idle. Persistent knocking that doesn't clear as revs come up is not normal and calls for a compression and gear-train check. Parts for this engine are scarce and expensive today given its age and the conversion history, so price that into any purchase. Have your dealer or a diesel shop verify actual mechanical condition before relying on the original V8 for real work.
How do you start the gasoline pony motor, and what usually stops it from turning the main engine over?
The pony motor is a small gasoline engine with its own carburetor and magneto, used only to crank the big diesel. Typical sequence: get pony oil pressure up first, keep the main engine's decompression lever off compression while the pony spins freely, engage the lever that drives the pony against the main engine's flywheel through a clutch/Bendix-style engagement, then move the decompression lever to compression once the diesel is turning so it lights off. A machine that's sat for years commonly has the main engine's fuel rack stuck wide open from old varnished fuel - free that before attempting a start, since a stuck-open rack is a runaway risk once the diesel fires. If the pony spins freely but never engages the flywheel, suspect a worn or gummed engagement/clutch linkage rather than the pony motor itself. Have your dealer or an experienced vintage-Cat mechanic verify decompression and fuel-rack function before starting a machine that's been sitting a long time.
What ignition and electrical maintenance keeps the pony motor starting reliably?
These pony motors fire off a magneto, not a battery coil, so troubleshooting is mechanical rather than electronic. Worn points and a weak condenser are the first suspects for a hard-start or no-spark complaint - clean or replace points, and swap the condenser if the spark isn't a healthy blue snap. Use non-resistor spark plugs (a magneto doesn't perform well with resistor plugs), gapped around 0.6 mm (0.025 in), wired with plain copper-core leads - avoid resistor or radio-suppression wire, which weakens spark on a magneto system. Check magneto timing against the flywheel timing marks if the pony is hard to start or kicks back. This machine predates any electronic engine controls or diagnostic sensors entirely - there is no fault-code system to check, only points, plugs, wiring and mechanical linkage.
What hydraulic behavior should I expect from a loader this old, and are there quirks specific to this model?
Detailed hydraulic complaints tied to this exact pre-lettered generation aren't well documented in public discussion - it's a much thinner paper trail than the later lettered 980s. What generalizes from articulated wheel loaders of this era: open-center, gear-pump-fed circuits where lift and steering response softens as the pump and relief valve wear, and original-era cylinder packing is long past its service life on any survivor. Expect to reseal cylinders before putting one back into real work, and check rod surfaces for scoring from decades of storage. Treat any seller claim about hydraulic performance with skepticism until you've cycled every function - lift, tilt, and steering - through full travel yourself.
What wear pattern should I expect at the articulation joint and steering linkage?
Specific wear figures for this loader's articulation joint aren't well documented online, but the pattern generalizes from articulated loaders of this era: the center pins and bushings are grease-fed, not sealed, so wear tracks directly with how consistently they were greased over the machine's life. Expect looseness, metal-to-metal knock at the hitch, or wandering steering under load if grease intervals were skipped. Daily greasing, more often in wet or abrasive conditions, is what keeps these joints tight long-term. Any perceptible play should be measured against factory clearance specs rather than eyeballed. Have your dealer verify steering and articulation pin condition before putting the loader back into service.
Are frame cracks a known issue on a machine this old, and where should I look?
A machine this age has generally lived a full working life plus decades of storage, so frame integrity deserves a hard look rather than an assumption. Check the mainframe and the articulation-hitch area for cracks, and look closely at every weld - a repaired crack is a sign the frame was stressed there before, and it can open again in the same spot. This is general vintage-heavy-equipment wisdom for a chassis this old, not a documented weak point unique to this model. Walk the full frame with a light and inspect from underneath, not just what's visible standing next to it. Have your dealer or a certified inspector verify frame and structural condition before trusting the machine under load.
What should I check before buying a used one of these?
Confirm the pony motor actually starts and drives the main engine over on its own - a swapped-in start system or a missing pony motor changes the character and value of the machine significantly. Ask directly whether the diesel has ever been converted away from the original V8 to an inline-six diesel; it was a documented factory option and common enough that you shouldn't assume the engine under the hood matches the original spec plate. Pull a compression check on whichever engine is actually installed. Inspect the frame and articulation hitch for cracks and repair welds, and check pin/bushing play at the articulation joint. Cycle every hydraulic function through full travel and watch for slow or spongy response, since original cylinder seals are decades past service life on any survivor. Record the exact serial number before sourcing parts - Caterpillar issued more than one parts book covering different serial ranges of this loader, and components changed partway through the production run. Have your dealer or an experienced vintage-Cat mechanic do a full pre-purchase inspection rather than relying on the seller's word alone.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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