Caterpillar 980G II
Maintenance schedule, common problems & OEM parts breakdown
The 980G II is a Caterpillar medium wheel loader built from 2002 to 2006 as the second-generation update to the 980G line. It runs the Caterpillar 3406E EUI (Electronic Unit Injector) engine with ATAAC air-to-air aftercooling, rated at 232 kW (311 hp) flywheel power and up to 238 kW (319 hp) maximum, replacing the mechanically injected 3406C used in the original 980G. Operating weight runs roughly 28.9-30.2 t (63,700-66,600 lb) depending on bucket type and ground-engaging tool fitted. Power reaches the ground through a powershift transmission with a lockup torque converter. Caterpillar offered the 980G II in a standard configuration and in an extreme-service or aggregate-handling build with heavier lift-arm steel, added guarding, and an optional water-glycol hydraulic fluid for fire-risk environments, alongside a range of general-purpose, rock, and material-handling buckets. The 980G directly preceded it and the 980H, with a Cat C15 ACERT engine, succeeded it.
The move from 980G to 980G II centered on the engine: electronic fuel control and ATAAC replaced the older mechanically governed 3406C, and Caterpillar paired it with a lockup-clutch torque converter and a longer engine oil change interval to cut owning and operating cost. The 980H that followed carried the update further with a C15 ACERT engine and an electronically controlled clutch-pressure transmission for smoother shifting, retiring the 3406E from this loader line. In today's used and parts market, the 980G II sits in a well-supported middle generation: its axle, differential, and final-drive design carries forward from the wider G-series family, and the 3406E engine family was built in large numbers across on-highway and industrial applications, so engines, turbochargers, and injection components remain straightforward to source or rebuild. That keeps 980G II units economical to keep running in quarry, aggregate, and general construction service.
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 980G II specifications
Engine
| Engine model | Caterpillar 3406E EUI (Electronic Unit Injector) with ATAAC (air-to-air aftercooling); inline six-cylinder, turbocharged, four-stroke direct injection. ADEM III electronic control module governs timing, fuel delivery and diagnostics. |
| Displacement | 14.6 L (893 in³); bore 137 mm (5.4 in), stroke 165 mm (6.5 in) |
| Rated flywheel power | 232 kW (311 hp) per ISO 9249; 315 PS per DIN 70020 |
| Maximum flywheel power | 238 kW (319 hp) |
| Peak torque | 1623 N·m (1,197 lb-ft) at 1,200 rpm; total torque rise 47% |
| Emissions certification | Tier 2 compliant (US); meets EU emissions requirements in effect through 2005 |
Weights
| Operating weight (standard configuration, 5.7 m³ bucket, bolt-on cutting edge) | 30 207 kg (66,576 lb) |
| Operating weight range (by bucket size/GET configuration) | 28 880 - 30 280 kg (63,669 - 66,737 lb); varies by bucket type and ground engaging tool selected |
| Shipping weight / ground pressure | Not published for this configuration set - confirm with dealer if needed |
Dimensions
| Wheelbase | 3.70 m (12'2") |
| Overall length | 9.25 - 9.89 m (30'4" - 32'5"); varies by bucket type and GET configuration |
| Width over tires | 3.25 - 3.29 m (127.9 - 129.3 in) depending on tire selection; overall width with standard general-purpose bucket 3.53 m (11'7") |
| Height to top of ROPS | 3.75 m (12'4") |
| Height to top of exhaust pipe | 3.39 m (11'1") |
| Ground clearance | 0.467 - 0.521 m (18.4 - 20.5 in) depending on tire selection; 0.467 m (18.4 in) with standard 29.5-R25 (L-3) tires |
| Tread width (29.5-25 tires) | 2.44 m (8'0") |
| Maximum single-wheel rise and fall (rear axle oscillation ±13°) | 550 mm (21.7 in) |
Performance
| Forward travel speeds (4-speed powershift, max with 29.5-25 tires) | 1st 7.1 km/h (4.4 mph); 2nd 12.6 km/h (7.8 mph); 3rd 21.96 km/h (13.6 mph); 4th 37.4 km/h (23.2 mph) |
| Reverse travel speeds (max with 29.5-25 tires) | 1st 7.5 km/h (4.6 mph); 2nd 13.1 km/h (8.2 mph); 3rd 23 km/h (14.3 mph); 4th 42.8 km/h (24.8 mph) |
| Static tipping load, full 37° turn | 17 333 - 21 528 kg (38,212 - 47,448 lb); varies by bucket type and GET configuration |
| Breakout force | 176 - 272 kN (39,617 - 61,214 lb); varies by bucket type and GET configuration |
| Hydraulic cycle times | Raise 6.0 sec; dump 2.0 sec; lower (empty, float down) 3.4 sec; total cycle 11.4 sec |
| Dump clearance at full lift, 45° discharge | 2.80 - 3.45 m (9'2" - 11'4"); varies by bucket type. Optional high-lift arrangement adds 221 mm (9 in) of additional dump clearance |
| Rack-back and dump angles | Rack back at maximum lift 61°; rack back at carry 46°; rack back at ground 36°; dump angle at maximum lift 45° |
Service capacities (summary)
| Fuel tank (standard) | 470 L (124 gal) |
| Cooling system | 90 L (23.8 gal) |
| Engine oil (crankcase) | 38 L (10 gal) |
| Transmission | 70 L (18.5 gal) |
| Differentials and final drives, front | 87 L (23 gal) |
| Differentials and final drives, rear | 87 L (23 gal) |
| Hydraulic system, including tank | 250 L (66 gal) |
| Hydraulic tank only | 125 L (33 gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
980G II fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 38 L (10 US gal) | Cat DEO or Cat DEO-ULS multigrade diesel engine oil (API CH-4 category oil per factory service recommendation for this era). Viscosity by ambient temperature: SAE 0W-20 from -40°C to 10°C (-40°F to 50°F); SAE 0W-30 to 30°C (86°F); SAE 0W-40 to 40°C (104°F); SAE 5W-30 -30°C to 30°C (-22°F to 86°F); SAE 5W-40 -30°C to 50°C (-22°F to 122°F); SAE 10W-30 -18°C to 40°C (0°F to 104°F); SAE 10W-40 -18°C to 50°C (0°F to 122°F); SAE 15W-40 -9.5°C to 50°C (15°F to 122°F). Scheduled oil change every 500 hours. |
| Cooling system | 90 L (23.8 US gal) | Factory-filled with Cat ELC (Extended Life Coolant), premixed to 50% concentration, freeze protection to -34°C (-29°F). Rated up to 6,000 hours between changes with a check at 3,000 hours to confirm additive level. The air-to-air aftercooled engine needs a minimum 30% glycol concentration to guard against water pump cavitation. Conventional Cat DEAC coolant with supplemental coolant additive maintained at 3-6% concentration is an acceptable alternate, changed on a shorter interval. |
| Fuel tank | 470 L (124 US gal) | Distillate diesel fuel (No. 2-D or No. 1-D grade) meeting Caterpillar's diesel fuel specification; Ultra Low Sulfur Diesel (15 ppm sulfur or less) is acceptable. Minimum cetane number 40. |
| Transmission (powershift) | 70 L (18.5 US gal) | Cat TDTO (Transmission/Drive Train Oil). Viscosity by ambient temperature: SAE 0W-20 -40°C to 10°C (-40°F to 50°F); SAE 0W-30 -40°C to 20°C (-40°F to 68°F); SAE 5W-30 -30°C to 20°C (-22°F to 68°F); SAE 10W -20°C to 10°C (-4°F to 50°F); SAE 30 0°C to 35°C (32°F to 95°F); SAE 50 10°C to 50°C (50°F to 122°F). Cat TDTO-TMS synthetic-blend multi-season oil covers -20°C to 43°C (-4°F to 110°F) in one fill. |
| Front differential and final drive | 87 L (23 US gal) | Cat TDTO. Viscosity by ambient temperature: SAE 0W-20 -40°C to 0°C (-40°F to 32°F); SAE 0W-30 -40°C to 10°C (-40°F to 50°F); SAE 5W-30 -35°C to 10°C (-31°F to 50°F); SAE 10W -25°C to 15°C (-13°F to 59°F); SAE 30 -20°C to 43°C (-4°F to 110°F); SAE 50 10°C to 50°C (50°F to 122°F). Cat TDTO-TMS covers -30°C to 43°C (-22°F to 110°F) in one fill. |
| Rear differential and final drive | 87 L (23 US gal) | Same fluid and viscosity chart as the front axle: Cat TDTO across SAE 0W-20 through SAE 50 grades by climate, or Cat TDTO-TMS for a -30°C to 43°C (-22°F to 110°F) single-fill range. |
| Hydraulic system (including tank) | 250 L (66 US gal) | Cat HYDO Advanced 10 (SAE 10W) is the preferred fill for -20°C to 40°C (-4°F to 104°F) ambient and supports a 3,000-hour drain interval. Alternate viscosities by climate: SAE 0W-20/0W-30/0W-40 for the coldest conditions down to -40°C (-40°F); SAE 5W-30/5W-40 down to -30°C (-22°F); SAE 30 for 10°C to 50°C (50°F to 122°F); SAE 15W-40 or Cat TDTO-TMS for -15°C to 50°C (5°F to 122°F). Cat HYDO, Cat MTO, Cat DEO/DEO-ULS, and Cat TDTO/Arctic TDTO are all acceptable substitutes at the matching viscosity. |
| Hydraulic tank (reservoir only) | 125 L (33 US gal) | Same Cat HYDO Advanced 10 fluid and viscosity-by-climate guidance as the full hydraulic system. |
| Grease (chassis lubrication points) | Not a fill-volume item; central lube bank with remote grease lines to front and rear frame pivots | Cat Advanced 3Moly Grease (NLGI 2, moderate-to-high load pin joints) for articulation, bucket, and lift-arm pivots, rated -20°C to 40°C (-4°F to 104°F). Cat Ultra 5Moly Grease (NLGI 1 or 2) for the most heavily loaded joints or cold/severe conditions, rated -35°C to 50°C (-31°F to 122°F). Cat Multipurpose Grease (NLGI 2) is acceptable for low-load points, rated -30°C to 40°C (-22°F to 104°F). Cat High Speed Ball Bearing Grease is used at the fan drive bearings. U-joints are lifetime lubricated; only the slip joint needs periodic grease. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 980G II maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 3,000 h |
|
| Every 6,000 h |
|
Servicing the 980G II beyond the schedule
Predictive Maintenance & Fluid Analysis
Run S·O·S oil sampling on the 3406E EUI engine, powershift transmission, front/rear axle final drives, and hydraulic tank every 250 hours to catch turbocharger, torque-converter clutch, and planetary gear wear before failure. Track coolant additive level at the mid-life check point ahead of the full coolant change, since the ATAAC-cooled engine is sensitive to low glycol concentration. Watch hydraulic sample trends for water-glycol contamination if that optional fluid is fitted.
Corrective & Common Repairs
Boost leaks at ATAAC piping or turbocharger shaft play show up as power loss and black smoke on the 3406E EUI engine; pressure-test the circuit before condemning injectors. Z-bar loader linkage bushings and lift-cylinder pins wear fastest on aggregate and quarry duty and cause bucket play. Torque-converter lockup clutch slip shows up as sluggish acceleration or hot transmission oil. Front and rear final-drive bearings take the brunt of loaded-bucket cycling and are the most common axle repair.
Overhaul & Rebuild Points
High-hour 3406E EUI engines typically need cylinder liner, injector, and turbocharger overhaul once oil-sample trends show rising wear metals. The powershift transmission and lockup torque-converter clutch packs are the next wear tier, followed by front and rear differential and planetary final-drive rebuilds. Z-bar lift-arm pivot pins and bushings, plus the reinforced lift-arm structure on extreme-service configurations, are the structural rebuild points on units run hard in face-and-bank loading.
Seasonal & Environment Servicing
Confirm the coolant holds its rated premix for cold-weather freeze protection before winter; the air-to-air aftercooled 3406E needs adequate glycol concentration to avoid water-pump cavitation. Check the ether starting-aid cylinder ahead of cold months. In hot, dusty quarry or aggregate environments, clear the radiator, hydraulic oil cooler, and ATAAC core fins often to prevent overheating, and consider the optional water-glycol hydraulic fluid where fire risk is a concern.
980G II common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 1D-4540 | Bolt,Machine Fuel Filter Mounting | Fuel system service | Check fitment → |
| 9S-8752 | Nut-Full | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
980G II fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| 001-05 (per cylinder, 1-6) | Cylinder injector solenoid circuit open | Open injector solenoid winding, a damaged harness pin, or a disconnected injector connector on the 3406E EUI fuel system. | Check the injector wiring harness and connector for that cylinder and verify solenoid resistance against spec before replacing the injector. |
| 096-03 | Fuel level sensor signal shorted high | Sender signal wire shorted to battery-positive, a corroded tank sender connector, or a failed level sender. | Inspect the fuel sender wiring and connector for a short before replacing the sender. |
| 100-01 | Engine oil pressure below normal operating range | Low oil level, a restricted oil filter, a worn oil pump, or a faulty pressure sensor or its wiring. | Check oil level and filter condition first, then verify sensor signal before further engine teardown. |
| 110-00 | Engine coolant temperature above normal operating range | Low coolant level, a plugged radiator core, a failed thermostat, or a fan drive/fan clutch fault. | Check coolant level and radiator core condition, confirm fan operation, then verify the coolant temperature sensor signal. |
| 168-02 | Electrical system (battery) voltage erratic or intermittent | Loose or corroded battery terminals, a bad ground strap, or fluctuating alternator output. | Check battery and ground connections and alternator charging output before suspecting the ECM. |
| 177-03 | Transmission oil temperature sensor voltage above normal | An open sensor signal circuit, a disconnected connector, or a failed sensor rather than an actual overtemp condition. | Check the sensor connector and wiring for an open circuit before replacing the transmission oil temperature sensor. |
| 190-12 | Loss of engine speed/timing signal | Damaged or corroded speed/timing sensor wiring or terminals (a known weak point on this engine family), a failed sensor, or an out-of-spec air gap; can trigger an engine derate. | Inspect the speed/timing sensor connector and harness terminals for corrosion or looseness, check the air gap, then test the sensor per the shop manual before replacing the ECM. |
| 254-12 | Electronic control module fault (bad or failed ECM) | Internal ECM failure, corrupted programming, or a wiring/connector fault at the ECM. | Check ECM connectors for corrosion, cycle the key, and reflash if applicable; replace the ECM only after ruling out a wiring fault. |
| 271-05 | Action alarm circuit open | Alarm unplugged, an open circuit in the alarm wiring, or a failed alarm. | Check the action alarm connector and wiring continuity before replacing the alarm. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
980G II attachments & work tools
General purpose buckets
Base general purpose line covers four sizes, 4.2-5.4 m3 (5.5-7.0 yd3), each offered with teeth, teeth-and-segments, or a reversible bolt-on cutting edge, giving a rated range up to 5.7 m3 (7.5 yd3) once edge choice is counted. Shell-and-tine construction with an integral spill guard suits stockpiling, rehandling, and bank loading where breakout force matters.
Rock and heavy-duty rock buckets
Spade-nose rock buckets for face or bank loading run 3.8-5.7 m3 (5.0-7.5 yd3) depending on edge and GET choice, with two-bolt corner guards for abrasive ground. Heavy-duty rock buckets add a thicker base edge, a four-piece liner package, and mechanically attached wear plates, offered in eight sizes from 4.2-4.8 m3 (5.5-6.25 yd3) for high-impact face loading.
Specialty buckets
Coal and waste/refuse buckets run around 8.0 m3 (10.4 yd3) for light, low-density material, and a dedicated material-handling bucket is offered near 5.5 m3 (7.5 yd3). Wood chip and slag buckets round out the line for mill and yard duty; slag buckets pair with the steel mill guarding arrangement.
Forks and log-handling tools
Forest machine arrangement adds large-capacity millyard forks and other job-matched forks for sorting, loading, and decking logs and timber, with an in-cab automatic fork positioner presettable to any angle. A low-profile millyard fork with widely spaced tines steadies tree-length logs; block-handling and logging forks are also offered for yard work.
Attachment mounting
Factory arrangement is pin-on, two-pin Z-bar loader linkage rated per SAE J732C, matching the multiple bucket-hinge configurations published for this size class. A quick coupler shared across the 980/980G/980H/980K family exists as a dealer-fit upgrade for faster tool changes, but it was not part of this model's original factory options list.
Work-tool hydraulics
Standard bucket/work-tool circuit is a gear-type pump rated about 464 L/min (120 gal/min) at 2100 rpm with a 20 700 kPa (3000 psi) relief setting, run through electro-hydraulic single-axis joysticks with in-cab adjustable lift and tilt kick-outs. A three-valve hydraulic arrangement is a factory option for powering a third function such as fork positioning or a grapple.
Ride control and payload systems
Ride Control is an optional nitrogen-oil accumulator in the lift circuit, offered in two- or three-valve versions, to dampen bucket loads and smooth travel with a full bucket. Payload Control System, factory or dealer installed, weighs and tracks bucket loads by truck for material-handling accuracy.
High lift arrangement
Optional high lift arrangement adds about 221 mm (9 in) of dump clearance over the standard-lift geometry for taller trucks or higher stockpiles; the high-lift bucket selection chart runs slightly lower capacity than the standard-lift chart for the same bucket sizes.
Waste handling arrangement
Guarding package for transfer-station and recycling duty adds a heavier hood, front driveshaft guard, headlight guards, heavy-duty engine and transmission mounts, hitch-area guards, hydraulic and fuel tank guards, a modified counterweight and frame, powered crankcase and power-train guards, steel front fenders, steering-cylinder guards, and a protected transmission dipstick.
Steel mill application arrangement
Heavy-guarding package for mill duty adds chain clearance, an extreme-service transmission, a fabricated rear bumper and counterweight, heavy-duty (T1 steel) lift arms, heavy-duty engine and transmission mounts, hydraulic hose protection, insulated battery mounting, a raised air precleaner, remote engine shutdown and parking-brake release, greaseable linkage pins, and an optional water-glycol hydraulic fluid fill; slag buckets are the matched work tool.
Ground engaging tools and counterweight
GET choices span teeth, teeth-and-segments, and reversible bolt-on cutting edges across the general purpose and rock bucket lines, with an abrasion resistant GET option for extended wear life; base edges are pre-drilled for a corner-guard system. Standard counterweight is a two-piece rear bumper and bottom slab, swapped for a modified or fabricated unit under the waste-handling and steel-mill arrangements.
All 980G II assemblies by section
Every catalogued assembly group for the Caterpillar 980G II. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Electrical And Starting System
215-2249 Switch Gp-Quick Coupler -Custom
| 21***49 | Switch Group-Quick Coupler; -Custom | 1 |
| 21***33 | Switch As-Rocker; (24-Volt)(Implement Lockout) | 1 |
| 3E***09 | Plug; (Rocker Switch)(Front Floodlight) | 1 |
197-4147 Switch Gp-Ride Control
| 10***33 | Switch As-Rocker; (Ride Control) | 1 |
| 19***47 | Switch Group-Ride Control; (Ride Control) | 1 |
| 3E***80 | Actuator-Rocker | 1 |
175-4207 Wiring Gp-Electrohydraulic
| 10***01 | Kit; (Receptacle) (12-Pin) (Includes Receptacle As & Wedge) | 1 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 2 |
| 10***04 | Kit-Receptacle; (4-Pin)(Start Switch) | 1 |
123-8944 Wiring Gp-Ride Control
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 12***44 | Wiring Group-Ride Control | 1 |
| 13***01 | Clip | 2 |
Frame And Body
126-0433 Counterweight Gp
| 10***96 | Pin-Keeper | 1 |
| 11***17 | Counterweight | 1 |
| 11***69 | Pin | 1 |
209-2262 Frame As-Rear
| 11***73 | Stud-Weld; (M12x1.75x21.1-mm) | 8 |
| 11***91 | Bracket As | 2 |
| 13***18 | Bracket | 2 |
Hydraulic System
221-1758 Accumulator Gp-Ride Control -Charged
| 11***10 | Protector-Gas Valve | 1 |
| 17***94 | Kit-Seal; (Ride Control Accumulator) | 0 |
| 1J***71 | Seal (10.52 Degrees I.D.); Seal-O-Ring -- To Adapter | 1 |
221-1762 Accumulator Gp-Ride Control
| 17***94 | Kit-Seal; (Ride Control Accumulator) | 1 |
| 19***50 | Core | 1 |
| 22***62 | Accumulator Group-Ride Control; -Charged | 1 |
222-1488 Control & Lines Gp-Ride
| 11***28 | Valve Group-Diverter; -Ride Control | 1 |
| 12***41 | Hose Assem. | 1 |
| 12***42 | Hose Assem. | 1 |
168-7152 Control & Lines Gp-Ride -Custom
| 10***08 | Valve Group-Check; (Brake Accumulator) | 1 |
| 11***28 | Valve Group-Diverter; -Ride Control | 1 |
| 12***41 | Hose Assem. | 1 |
209-8204 Control Ar-Ride -Custom
| 12***44 | Wiring Group-Ride Control | 1 |
| 16***52 | Control & Lines Group-Ride; -Custom | 1 |
| 19***47 | Switch Group-Ride Control; (Ride Control) | 1 |
209-8198 Control Ar-Ride -Custom
| 12***44 | Wiring Group-Ride Control | 1 |
| 16***52 | Control & Lines Group-Ride; -Custom | 1 |
| 19***47 | Switch Group-Ride Control; (Ride Control) | 1 |
146-9118 Cylinder & Seal Gp-Tilt -Lh
| 14***18 | Cylinder & Seal Group-Tilt; -Block Handler, Lh | 1 |
| 23***69 | Cylinder Group-Tilt; -Block Handler, Lh | 1 |
| 7K***12 | Seal-Lip; (88.9mm Id) | 4 |
146-9117 Cylinder & Seal Gp-Tilt -Rh
| 14***17 | Cylinder & Seal Group-Tilt; -Block Handler, Rh | 1 |
| 23***67 | Cylinder Group-Tilt; -Block Handler, Rh | 1 |
| 7K***12 | Seal-Lip; (88.9mm Id) | 4 |
146-3032 Cylinder Gp-Tilt -Rh
| 13***65 | Head-Hydraulic Cylinder | 1 |
| 14***32 | Cylinder Group-Tilt; -Rh | 1 |
| 14***33 | Cylinder As | 1 |
236-8669 Cylinder Gp-Tilt
| 13***65 | Head-Hydraulic Cylinder | 1 |
| 14***34 | Rod As | 1 |
| 16***08 | Seal As-Buffer | 1 |
146-3035 Cylinder Gp-Tilt -Lh
| 13***65 | Head-Hydraulic Cylinder | 1 |
| 14***34 | Rod As | 1 |
| 14***35 | Cylinder Group-Tilt; -Lh | 1 |
236-8667 Cylinder Gp-Tilt
| 13***65 | Head-Hydraulic Cylinder | 1 |
| 14***34 | Rod As | 1 |
| 16***08 | Seal As-Buffer | 1 |
209-8097 Hydraulic Ar-3 Valve -Custom
| 11***77 | Lines Group-Front | 1 |
| 20***59 | Valve & Mtg Group-Main Control | 1 |
| 20***97 | Hydraulic Ar-3 Valve; -Custom | 1 |
116-7677 Lines Gp-Front
| 11***77 | Lines Group-Front | 1 |
| 11***71 | Hose Assem. | 2 |
| 11***74 | Tube Assembly | 2 |
209-3059 Valve & Mtg Gp-Main Control
| 11***35 | Manifold | 1 |
| 12***31 | Tube Assem. | 1 |
| 12***33 | Tube Assem. | 1 |
209-8165 Valve & Mtg Gp-Main Control
| 11***35 | Manifold | 1 |
| 12***31 | Tube Assem. | 1 |
| 12***33 | Tube Assem. | 1 |
209-8200 Valve & Mtg Gp-Main Control -Custom
| 11***35 | Manifold | 1 |
| 12***31 | Tube Assem. | 1 |
| 12***33 | Tube Assem. | 1 |
118-5095 Valve Gp-Control -Auxiliary
| 09***91 | Bolt; (Locking) (M12x1.75x25mm) | 1 |
| 11***95 | Valve Group; (Auxiliary)(Auxiliary) | 1 |
| 16***06 | Spring; (Outer) | 1 |
164-7474 Valve Gp-Check
| 16***74 | Valve Group-Check; -Steering Clr Filter Byp, Pilot | 1 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 1 |
| 6V***97 | Seal (Later Machines And Field Installed) | 1 |
9t-3096 Valve Gp-Check
| 20***02 | Valve Group-Check; (Park Brake Release) | 1 |
| 20***34 | Valve Group-Check; (Park Brake Release) | 1 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 1 |
147-1142 Valve Gp-Main Control
| 00***63 | Seal-O-Ring; (55.24mm Id) | 2 |
| 09***91 | Bolt; (Locking) (M12x1.75x25mm) | 2 |
| 14***64 | Valve Group-Pilot; -Main | 1 |
115-9328 Valve Gp-Diverter
| 11***28 | Valve Group-Diverter; -Ride Control | 1 |
| 15***40 | Valve Group-Solenoid; -Reversing Fan, Ride Control | 1 |
| 19***95 | Flange-Half | 4 |
146-9064 Valve Gp-Relief
| 14***64 | Valve Group-Pilot; -Main | 1 |
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 1 |
| 4J***22 | Seal-Interface Between 3rd & Tilt Valve | 1 |
146-8396 Valve Gp-Main Control
| 00***63 | Seal-O-Ring; (55.24mm Id) | 3 |
| 09***91 | Bolt; (Locking) (M12x1.75x25mm) | 2 |
| 11***95 | Valve Group; (Auxiliary)(Auxiliary) | 1 |
206-5186 Valve Gp-Pilot -Oil Manifold, 2-Function
| 10***48 | Kit-Seal; (Solenoid Valve)(Pilot Proportioning Valve) | 1 |
| 11***83 | Body | 1 |
| 11***66 | Valve Group-Pressure Reducing; -Implement Pilot | 1 |
206-5191 Valve Gp-Pilot -Oil Manifold, 3-Function
| 10***48 | Kit-Seal; (Solenoid Valve)(Pilot Proportioning Valve) | 1 |
| 11***83 | Body | 1 |
| 11***66 | Valve Group-Pressure Reducing; -Implement Pilot | 1 |
114-1267 Valve Gp-Pressure Reducing
| 11***67 | Valve Group-Pressure Reducing; -Steering-Pilot | 1 |
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
| 5P***99 | Ring-To Clutch Piston Pins | 1 |
114-1266 Valve Gp-Pressure Reducing
| 11***66 | Valve Group-Pressure Reducing; -Implement Pilot | 1 |
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
| 5P***99 | Ring-To Clutch Piston Pins | 1 |
4t-4934 Valve Gp-Relief -Line
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 2 |
| 4T***41 | Spring | 1 |
| 4T***34 | Valve Group-Relief; -Brake Accumulator Pressure | 1 |
4t-6103 Valve Gp-Relief -Line
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 2 |
| 4T***41 | Spring | 1 |
| 4T***03 | Valve Group-Relief; (Line, Tilt Cyl Rod End Port) | 1 |
4t-4935 Valve Gp-Relief -Line
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 2 |
| 4T***35 | Valve Group-Relief; -Main-Implement Inlet Manifiold | 1 |
| 4T***42 | Spring | 1 |
4t-4162 Valve Gp-Relief
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 2 |
| 4T***41 | Spring | 1 |
| 4T***62 | Valve Group-Relief; (Line, Auxiliary Cyl Rod End) | 1 |
114-1268 Valve Gp-Sequence
| 11***68 | Valve Group-Sequence; -Float | 1 |
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
| 5P***99 | Ring-To Clutch Piston Pins | 1 |
141-1481 Valve Gp-Shuttle
6e-3373 Valve Gp-Shuttle
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
| 5P***99 | Ring-To Clutch Piston Pins | 1 |
| 6E***10 | Seal-O-Ring; (16.10mm Id) | 1 |
4t-1860 Valve Gp-Shuttle
| 1M***18 | Ball | 1 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 1 |
| 4T***60 | Valve Group-Shuttle; -Ripper Lift-Ripper Tilt-Blade Tilt-Blade Lift | 1 |
125-3657 Valve Gp-Shuttle
203-4157 Valve Gp-Solenoid -Hydraulic Lockout
152-8340 Valve Gp-Solenoid
Implements
175-6351 Arm As-Lift
Machine Arrangement
209-2241 Conversion Ar-Block Handling
| 12***33 | Counterweight Group | 1 |
| 14***17 | Cylinder & Seal Group-Tilt; -Block Handler, Rh | 1 |
| 14***18 | Cylinder & Seal Group-Tilt; -Block Handler, Lh | 1 |
Power Train
112-7876 Case & Parts Gp-Planetary
| 03***47 | Elbow-Filtered Fuel From Based Assembly | 2 |
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 16 |
| 0S***66 | Bolt-Pulley To Crankshaft Adapter | 2 |
116-7197 Control Gp-Transmission Hyd
| 10***29 | Retainer | 1 |
| 10***30 | Gasket | 1 |
| 11***60 | Plug | 1 |
106-8729 Cover Gp-Shipping
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 0S***21 | Bolt --Brace To Starting Engine Mounting Pad; Bolt-- Brace To Starting Engine Mounting Pad | 8 |
| 0T***18 | Bolt Strap To Front Cover | 12 |
108-3120 Gear Gp-Output Transfer
| 03***57 | Bolt; --To Reverse Shaft Bearing Retainer & Forward Shaft Bearing Retainer | 10 |
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 8 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 5 |
6p-3761 Planetary Gp-Transmission
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 8 |
| 0T***65 | Bolt--3/8" X 3 1/2"--Use As Required; Bolt 5t***56 Plate To Cover Gp 4n***72 | 20 |
| 10***98 | Bearing-Ball | 2 |
116-7167 Torque Converter & Housing Gp
| 10***28 | Gear-Idler; (64-Teeth) | 1 |
| 11***67 | Torque Converter & Housing Group; -Heavy-Duty Transmission | 1 |
| 14***14 | Gear-Drive; (14-Teeth)(64 Teeth) | 1 |
8e-4735 Torque Converter Gp
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 12 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 20 |
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 36 |
205-1207 Transmission Ar
| 11***84 | Transmission Ar; -Heavy Duty-Heavy-Duty | 1 |
| 20***07 | Transmission Ar | 1 |
116-7684 Transmission Ar
| 10***29 | Cover Group-Shipping | 1 |
| 10***20 | Gear Group-Output Transfer | 1 |
| 11***76 | Case & Parts Group-Planetary | 1 |
8p-1471 Valve Gp-Relief -Torque Converter Outlet
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 14***46 | Plug-Pipe | 1 |
| 1L***62 | Ring-Retaining | 1 |
8e-6398 Valve Gp-Selector
| 2B***95 | Cap Screw--Tube Assembly To Air Inlet Pipe | 2 |
| 2S***72 | Stop | 1 |
| 5P***61 | Ring-Retaining | 1 |
124-5200 Valve Gp-Selector & Press Cont -Transmission
| 10***54 | Body | 1 |
| 12***00 | Valve Group-Selector & Press Cont; -Transmission | 1 |
| 2A***46 | Plug 9.80mm(.386in.)Outside Dia. | 1 |
116-7196 Valve Gp-Transmission Control
| 03***01 | Bolt; --To Reverse Shaft Bearing Retainer | 1 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 3 |
| 10***83 | Kit-Seal; (Solenoid Valve) | 1 |
980G II serial number reference
On the 980G Series II the PIN plate is a riveted metal tag on the left side of the front frame near the operator's step/cab area (a duplicate is also on the engine). Read the first 3 characters as the serial prefix (identifies the production/configuration block, e.g. AWH, AXG, AYT) and the following digits as the sequential unit number within that block. On machines built from 2001 onward the plate shows the full 17-character PIN; the last 8 characters are the same prefix + sequence serial used in older 8-character format lookups.
| Prefix | Identifies | Notes |
|---|---|---|
| AWH | 980G Series II wheel loader, earliest production block | AWH00001-UP. Cat 3406E EUI ATAAC diesel (rated about 232 kW / 311 hp flywheel, max 238 kW / 319 hp). Some parts listings shorten the engine name to plain 3406, but the factory service and operation manuals for this prefix are titled 980G Series II and pair it with AXG and AYT, so it is the same electronic-injection engine used across the II run, not the earlier mechanically-injected 980G. |
| AXG | 980G Series II wheel loader, mid production block | AXG00001-UP. Cat 3406E EUI ATAAC diesel. Covered together with AWH and AYT in the same factory operation and maintenance manual, and in Caterpillar's own online parts catalog under the 980G Series II heading. |
| AYT | 980G Series II wheel loader, later production block | AYT00001-UP. Cat 3406E EUI ATAAC diesel. Shares the same factory manual family as AWH and AXG. Full 17-character PIN examples follow the pattern CAT0980G_AYT##### (plant/check character varies by unit); units built 2004-2005 have turned up with this prefix. |
Frequently asked questions
What engine does the Caterpillar 980G II use?
The 980G II runs the Caterpillar 3406E EUI (Electronic Unit Injector) engine with ATAAC air-to-air aftercooling, rated at 232 kW (311 hp) flywheel power with a 238 kW (319 hp) maximum. This replaced the mechanically injected 3406C used in the original 980G.
What is the operating weight of the Caterpillar 980G II?
Operating weight runs roughly 28.9-30.2 t (63,700-66,600 lb) depending on bucket type and ground-engaging tool fitted; a standard general-purpose bucket configuration lands near 30.2 t (66,576 lb). Treat the figure as configuration-dependent rather than a single fixed number.
What replaced the Caterpillar 980G II?
Caterpillar replaced the 980G II with the 980H, which uses the C15 ACERT engine and adds an electronically controlled clutch-pressure transmission for smoother shifting.
What 980G II owners discuss
Why do owners report a lag before the loader arms lift or curl on the 980G II?
What steering complaint keeps showing up for this loader?
Why does losing the park brake sometimes take the boom and tilt functions with it?
What engine quirks come up specifically for the 3406E EUI in the Series II?
How do electrical and sensor faults typically present on this loader?
What wear patterns are typical for a Z-bar loader like this one?
What should a buyer check specifically on a used 980G II?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific 980G II part?
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