Caterpillar 972G II
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar 972G Series II is a medium-to-large wheel loader in Cat's roughly 25-27 tonne class, built about 2001 to 2005 as the second and final update of the G-series 972 platform before the line moved to the 972H. It replaced the earlier 972G (1999-2001), which ran a mechanically governed Cat 3306 engine, with a Cat 3196 ATAAC diesel: a six-cylinder, turbocharged, air-to-air aftercooled engine under ADEM III electronic control, rated at roughly 201 kW (270 hp) net and certified to EPA Tier II. Operating weight runs approximately 24,855-26,900 kg (54,800-59,300 lb) depending on bucket, tire, and counterweight configuration, with bucket capacities from 3.8-5.5 m³ (5.0-7.2 yd³) across general-purpose, high-lift, and waste/Delta bucket options. Cat offered it as a standard general-purpose loader, a High Lift arrangement with an optional third hydraulic valve, and a Waste Handler arrangement with extended lift geometry and added powertrain guarding for transfer stations and recycling work. Recognized serial prefixes for this series include AWY, AXC, AXE, AXJ, AXN, and AWP.
Beyond the badge change, the Series II update reworked engine breathing and cooling: airflow reverses to enter through the rear grille and exit through the top and side hood panels, paired with a lower-fin-density radiator core designed to shed debris rather than pack with it. The proven axle architecture, planetary powershift transmission with Electronic Clutch Pressure Control, and Free Wheel Stator torque converter carried over largely unchanged from the 972G, so the biggest functional shift for owners was the switch to electronic engine management and its diagnostics. In the used and parts market, the 972G Series II sits in a well-documented corner of Cat's long-running 972 lineage, but its 3196 ATAAC powertrain and ADEM III controls are specific to this series. Buyers and technicians should confirm the serial prefix before sourcing engine, fuel-system, or ECM-related parts, since specs and service literature diverge from both the plain 972G before it and the C13 ACERT-powered 972H that replaced it around 2006.
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 972G II specifications
Engine
| Engine model | Cat 3196 (ATAAC) — six-cylinder, direct injection, turbocharged, air-to-air aftercooled, four valves per cylinder. Electronically controlled through the Cat ADEM III module. |
| Net power | 201 kW (270 hp) at 2150 rpm |
| Maximum power | 213 kW (285 hp) |
| Peak torque | 1332 N·m (982 lb-ft) |
| Displacement | 12.0 L (732 in³), 6 cylinders |
| Emissions tier | EPA Tier II, consistent with its 2001-2005 production window |
Weights
| Operating weight | 24,855-25,610 kg (54,780-56,444 lb), varies by bucket type and cutting-edge configuration (general purpose, material handling, rock, heavy-duty rock, quick-coupler, or waste bucket) |
| Operating weight basis | Includes sound-suppressed cab and ROPS, 26.5 R25 XHA (L-3) radial tires, full fuel tank, coolant, lubricants, and operator |
| High-lift arrangement weight change | +87 kg (+192 lb) over standard-lift configuration, across all bucket types |
| Shipping weight | Not published separately from operating weight in available spec literature |
| Ground pressure | Not published in available spec literature |
Dimensions
| Overall (transport) length | 9.08-9.51 m (29'9"-31'2"), varies by bucket type; approximately 9.25-9.28 m (30'4") for a typical general-purpose bucket |
| Transport width (over tires) | 2.97 m (9'9") with standard 26.5 R25 XHA (L-3) tires |
| Transport height (top of ROPS) | 3.58 m (11'9") |
| Height to top of exhaust pipe | 3.535 m (11'7") |
| Height to top of hood | 2.555 m (8'5") |
| Overall height, bucket at full raise | 5.99-6.39 m (19'7"-20'11"), varies by bucket type |
| Wheelbase | 3.45 m (11'4") |
| Tread width | 2.23 m (7'4"), all tire options |
| Ground clearance | 565 mm (22 in) with standard tires; changes slightly with alternate tire options |
| Turning radius, outside | 6.63 m (21'9") |
| Lift-pin (B-pin) height, full raise | 4.445 m (14'7") |
| Axle housing clearance | 430 mm (1'5") |
Performance
| Travel speed | Up to 35.7 km/h (22.2 mph) |
| Static tipping load, straight | 17,880-20,830 kg (39,408-45,909 lb), varies by bucket type |
| Static tipping load, articulated at full 37° turn | 15,740-18,300 kg (34,691-40,333 lb), varies by bucket type |
| Breakout force | 203.0-243.3 kN (45,612-54,668 lb), varies by bucket type and cutting-edge option |
| Digging depth | 78-133 mm (3.0-5.2 in), varies by bucket type |
| Rack-back angle, maximum lift | 55° |
| Rack-back angle, carry position | 47° |
| Rack-back angle, ground level | 42° |
| Dump angle at maximum lift | 50° with a general-purpose bucket; 45° with a material-handling bucket |
| Gradeability | Not published in available spec literature |
Service capacities (summary)
| Engine oil service interval | Extended to 500 hours between changes (after an initial 250-hour change) when using CH-4 spec oil — a service interval, not a refill volume |
| Cooling system service interval | Factory-fill extended-life coolant rated up to 6000 hours between changes — a service interval, not a refill volume |
| Fuel tank, hydraulic system, engine oil, and cooling system capacities | Exact refill volumes for this model are not published in accessible spec literature. Confirm capacities against the Operation and Maintenance Manual or with your Cat dealer before servicing. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
972G II fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | approx. 35 L (9.3 US gal); some listings tied to the earlier 3306-engine 972G show 28 L (7.4 gal) instead — capacity varies by engine/series, confirm against the tag for the specific machine | Cat DEO diesel engine oil. SAE 10W-30 for -18 to 40 C (0 to 104 F); SAE 15W-40 for -10 to 50 C (14 to 122 F); Cat DEO Cold Weather SAE 0W-40 down to -40 C (-40 F) for extreme cold starts |
| Cooling system | 80 L (21.1 US gal) | Cat ELC (Extended Life Coolant/Antifreeze), factory fill, rated to -30 C (-22 F). Anti-foam and anti-corrosion package supports an extended 6000-hour change interval |
| Fuel tank | 380-410 L (100-108 US gal) dry fill — figure varies by configuration; verify against the tank fill plate or dealer parts book for the exact unit | No. 2-D diesel fuel (ultra low sulfur) meeting Cat fuel specification. Use a winter blend or fuel conditioner below freezing to prevent wax and gelling |
| Transmission (powershift) | 50 L (13.2 US gal) | Cat TDTO (Transmission/Drive Train Oil). SAE 30 is factory fill for 0 to 35 C (32 to 95 F); SAE 10W for -20 to 10 C; SAE 50 for hot climates 10 to 50 C; Cat TDTO-TMS multigrade covers a wide -15 to 43 C range |
| Front differential and final drive | 64 L (16.9 US gal) | Cat TDTO, shared sump with the wet-disc service brakes. SAE 30 factory fill, -15 to 43 C; SAE 10W for cold climates down to -20 C; SAE 50 for hot climates up to 35 C |
| Rear differential and final drive | 64 L (16.9 US gal) | Cat TDTO, shared sump with the wet-disc service brakes, same viscosity-by-climate guidance as the front axle. A limited-slip rear differential, where fitted, needs the Cat limited-slip additive treatment |
| Hydraulic system (including tank) | 207 L (54.7 US gal) total system | Cat HYDO hydraulic oil. SAE 10W for -20 to 40 C; SAE 20W for -5 to 45 C; SAE 30 for 0 to 50 C. Cat Bio Hydo (HEES), a biodegradable synthetic-ester oil, is offered as an environmental attachment, usable -30 to 45 C |
| Hydraulic tank | 140 L (37 US gal) | Same Cat HYDO oil family as the full hydraulic system; this is the tank-only figure for partial drains or top-off |
| Grease (chassis and pin points) | spec only — no reservoir capacity; applied at grouped remote and rear grease fittings per the lubrication chart | Cat multipurpose chassis grease, NLGI 2 lithium-complex base, for tilt/steering cylinder pins and rear-axle oscillation bearings. A semi-synthetic arctic-grade grease is recommended for sustained sub-zero climates |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 972G II 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 |
|
| Every 6,000 h |
|
Servicing the 972G II beyond the schedule
Predictive Maintenance & Fluid Analysis
The 972G Series II pairs the 3196 ATAAC engine and ADEM III controller with an onboard transmission oil-sampling valve, so scheduled fluid analysis is quick to pull. Sample engine, transmission, hydraulic, and axle oil on the 250/500/4000-hour cycle to trend wear metals and catch turbocharger or planetary final-drive wear before a teardown. Axle oil-temperature sensors and the Caterpillar Monitoring System flag ECPC and cooling-system faults early. The factory-fill extended-life coolant holds to 6,000 hours only if it is sampled and topped with the correct concentration.
Corrective & Common Repairs
Most 972G Series II repair calls trace to the wet multi-disc axle brakes, ECPC transmission solenoids, and the Free Wheel Stator torque converter cooler lines. Inspect axle brake oil condition and temperature readings at the first sign of pedal fade. Chase hard or delayed shifts to ECPC solenoid wiring before condemning the transmission. Despite the reversed-airflow cooling design, the radiator core still packs with fines in quarry and demolition work and needs regular back-flushing. Check loader-linkage pins, bushings, and cutting edges for play each shift.
Overhaul & Rebuild Points
High-hour 972G Series II machines due for overhaul should prioritize the 3196 ATAAC long block, turbocharger, and injectors, plus the ADEM III harness and connectors, which corrode with age. Rebuild the ECPC clutch packs and Free Wheel Stator torque converter together, since converter drag accelerates clutch wear. Axle housings need planetary final-drive and wet-disc brake pack inspection at rebuild, not just a fluid change. Check the loader-arm pins, articulation hitch, and frame around the lift-arm bosses for fatigue cracking before returning the machine to heavy cycle work.
Seasonal & Environment Servicing
Cold-climate 972G Series II operation demands checking extended-life coolant concentration for freeze protection and confirming the correct CH-4 engine oil viscosity for the 3196 ATAAC before winter startup; block heaters and ether-assist help cold cranking. In hot, dusty, or waste-handling environments, the auto-reversing fan option and air-intake precleaner with trash screen cut radiator and filter loading significantly. Waste Handler-configured machines need extra attention to axle seal guards and powertrain shields, which trap debris and hide leaks if not cleaned on the same interval as the radiator core.
972G II fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| 41-3 | Engine ECM 8-volt sensor supply voltage reads above normal or shorted to a higher voltage source. | Chafed harness contacting a hot circuit, a corroded connector, or a failing ECM sensor-supply driver. | Inspect harness routing and connectors on the 8-volt supply circuit for a short to power; clear the code and retest before replacing the engine ECM. |
| 41-4 | Engine ECM 8-volt sensor supply voltage reads below normal or shorted to ground. | Chafed or pinched harness shorted to frame ground, a corroded pin, or a failed sensor pulling the supply down. | Disconnect sensors fed by the 8-volt circuit one at a time to isolate the short, inspect the harness for ground contact, repair as needed. |
| 91-8 | Throttle/governor pedal position sensor signal is erratic - abnormal frequency, pulse width, or period. | Worn or misadjusted governor pedal sensor, a loose connector, or intermittent wiring. | Cycle the pedal through full travel while watching the signal on a diagnostic tool, reseat connectors, replace the pedal sensor if the fault repeats. |
| 100-1 | Engine oil pressure reading is valid but below the normal operating range for current rpm. | Low oil level, a worn oil pump, a restricted suction screen, or a failing pressure sensor. | Check oil level and condition first, confirm with a mechanical gauge before condemning the sensor, then investigate the pump and bearings if pressure is genuinely low. |
| 110-0 | Engine coolant temperature reading is valid but above the normal operating range. | Low coolant level, a plugged radiator core, a stuck thermostat, or a fan drive fault. | Check coolant level and radiator cleanliness, verify fan operation, confirm the reading with a hand-held temperature gauge before deeper teardown. |
| 168-4 | Machine electrical system (battery/charging) voltage reads below normal. | A weak or sulfated battery, a loose or corroded battery cable, or a charging system not reaching full output. | Load-test the batteries, check cable connections for corrosion, verify alternator output at the battery terminals. |
| 177-4 | Torque converter oil temperature sensor circuit reads below normal or open; the monitoring system cannot get a valid reading. | A corroded or damaged sender terminal, a poor ground path at the sender body, or chafed signal wiring between the sender and the monitoring module. | Inspect the sender connector and ground path first, repair wiring before replacing the sender. |
| 177-8 | Torque converter oil temperature signal is abnormal or erratic, which can display as a false high-temperature warning rather than a true overheat. | The same wiring/ground issues as a below-normal reading, or an intermittent connection at the sender. | Confirm actual torque converter oil temperature with a direct check before assuming true overheating, then repair the connector or wiring. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
972G II attachments & work tools
General purpose / excavation buckets
Standard bucket family for stockpiling, re-handling, excavation and bank loading. Heaped capacity runs roughly 3.8-5.5 m3 (5.0-7.2 yd3) depending on bucket width and application; fits pin-on or quick-coupler mounting.
Rock (V-edge) buckets
Heavy-wall bucket with a V-profile cutting edge for point-load penetration into shot rock, quarry stone and other dense, abrasive material. Capacity runs lower than a GP bucket of the same width because of the denser payload; built with extra wear plating.
Universal-profile buckets
Third bucket family offered alongside the GP and rock buckets, profiled for a broader mix of material types and dig conditions in one bucket. Sizing follows the same capacity range as the GP family for this loader class; confirm exact width/capacity with your dealer for the target job.
Ground engaging tools (GET)
Buckets accept bolt-on cutting edges, individual teeth, or a teeth-and-segment edge, chosen by material abrasiveness and impact loading. GET package is matched to the bucket family (GP vs rock) rather than sold as a separate machine option.
Pallet forks
Quick-coupler or pin-on fork carriage with swinging, width-adjustable tines for palletized and unitized loads. Tine length varies by supplier package; sized to this medium wheel loader's lift class.
Log, lumber and millyard forks
Forestry-duty fork attachments for log decks, mill yards and timber stacking, used with the Forest machine arrangement. Tine spacing and reach are set up for round or milled stock rather than palletized loads.
Material handling arm
Quick-coupler tool built from rectangular tubing with pre-drilled load points, for lifting or hooking irregular loads that a bucket or fork can't handle. Functions as a general-purpose utility lifting tool.
Sorting/timber grapple
Tine-and-clamp grapple for unloading trucks and sorting logs at a mill yard. Needs the auxiliary (third-valve) hydraulic circuit to actuate the clamp and is used with the Forest arrangement on this loader.
Quick coupler system
Factory quick-coupler option lets the operator swap buckets and work tools from the cab through a dedicated hydraulic actuation circuit, replacing pin-on mounting. Pin-on remains the base mounting configuration.
Third valve / auxiliary hydraulics
Optional third hydraulic valve circuit powers tilting or clamping work tools such as grapples and multi-function buckets. Required for the High Lift and Forest arrangements and any tool needing a dedicated auxiliary function beyond lift/tilt.
High Lift arrangement
Extended lift arm, tilt cylinder and link package adds roughly 336 mm (13 in) of dump/lift height over the standard linkage, for loading higher-sided trucks or hoppers. Pairs with the third-valve hydraulic option.
Forest arrangement
Heavy-duty front frame, third-valve hydraulics, a larger tilt cylinder and added counterweight give a higher static tipping load and better control when running forks or grapples. Built for log/timber handling duty rather than standard bucket work.
Waste Handler arrangement
Factory guarding package for transfer stations, recycling and refuse handling: axle seal guards, narrow steel front fenders, light guards, a hinged powertrain guard, front frame bottom guard, fuel/hydraulic tank guards, steering cylinder guards, and a heavy-duty ladder with cable step. Optional add-ons include an auto-reversing cooling fan, roof-mounted air conditioning, a trash-screened air precleaner, and a dedicated waste bucket.
Aggregates Autodig
Available on Command Control/Electronic Hydraulic (CC/EH) versions; automates the lift and tilt functions through the loading cycle while the operator keeps control of steering, direction and throttle. Aimed at repetitive quarry/aggregate loading cycles.
Ride control
Automatic ride control smooths boom motion over rough ground while traveling with a loaded bucket, cutting spillage and cab pitching. Offered on the 972G Series II as a standard or available system depending on configuration.
All 972G II assemblies by section
Every catalogued assembly group for the Caterpillar 972G II. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Air Inlet And Exhaust System
222-1330 Lines Gp-Air -Custom
| 16***81 | Washer | 4 |
| 17***35 | U-Bolt; (M10x1.5-Thd) | 1 |
| 18***93 | Tube | 1 |
207-5090 Precleaner Gp
| 10***95 | Damper | 1 |
| 17***95 | Clamp | 2 |
| 1L***66 | Button (Plug) | 1 |
207-5086 Precleaner Gp
| 07***07 | Precleaner As; (Air Cleaner Turbine) | 1 |
| 1L***66 | Button (Plug) | 1 |
| 20***86 | Precleaner Group | 1 |
Braking System
220-2726 Accumulator Gp-Brake
| 06***35 | Valve-Gas | 1 |
| 11***10 | Protector-Gas Valve | 1 |
| 1J***71 | Seal (10.52 Degrees I.D.); Seal-O-Ring -- To Adapter | 1 |
220-2727 Accumulator Gp-Brake
| 06***35 | Valve-Gas | 1 |
| 11***10 | Protector-Gas Valve | 1 |
| 1J***71 | Seal (10.52 Degrees I.D.); Seal-O-Ring -- To Adapter | 1 |
232-4503 Control Gp-Service Brake -Custom
| 09***87 | Tee | 2 |
| 10***46 | Rod-Control | 1 |
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
221-9454 Lines Gp-Service Brake -Custom
| 09***45 | Washer; (16.6x24x1.2-mm Thk) | 6 |
| 09***87 | Tee | 2 |
| 10***46 | Rod-Control | 1 |
106-1774 Valve Gp-Brake Control -Parking
| 10***74 | Valve Group-Brake Control; -Parking | 1 |
| 4J***33 | Seal Fuel Injection Pump | 2 |
| 9S***01 | Plug-O-Ring; (5/16-24 Thd) | 2 |
Cooling System
188-3090 Guard Gp-Fan
| 18***88 | Guard Assem. | 1 |
| 18***90 | Guard Group-Fan | 1 |
| 18***91 | Bracket Assem. | 6 |
220-1923 Radiator & Fan Gp -Custom
| 12***07 | Mount As-Resilient | 2 |
| 13***38 | Adapter | 1 |
| 16***76 | Bolt | 10 |
Electrical And Starting System
3e-7577 Alternator Gp-Charging
| 10***31 | Fan-Alternator; (11-Blade) | 1 |
| 10***32 | Collar; (Alternator) | 1 |
| 10***56 | Diode As; (Alternator) | 1 |
222-3346 Alternator Gp-Charging -Custom
| 18***94 | Alternator Group-Charging; -Waste Handling | 1 |
| 19***30 | Bracket As | 1 |
| 21***31 | Bracket | 1 |
9w-0742 Block Gp-Junction
| 6V***22 | Tube-Heat Shrink; (25.4-mm Dia)(10-M) | 0 |
| 7F***60 | Washer | 6 |
| 8C***58 | Block Group-Junction; (Battery) | 1 |
231-4415 Panel Gp-Circuit Breaker -Custom
| 0S***70 | Cap Screw (5/8" Long) | 2 |
| 10***01 | Kit; (Receptacle) (12-Pin) (Includes Receptacle As & Wedge) | 1 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 6 |
231-3992 Panel Gp-Circuit Breaker -Custom
| 16***79 | Bolt | 4 |
| 18***90 | Panel Group-Circuit Breaker | 1 |
| 22***62 | Washer | 4 |
193-2550 Sensor Gp-Speed
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 17***49 | Strap; (Marker) | 1 |
| 19***50 | Sensor Group-Speed; -Tmsn, Torque Converter Output | 1 |
118-7226 Sensor Gp-Temperature
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 11***26 | Sensor Group-Temperature; -Transmission Oil | 1 |
| 3E***71 | Wedge; (Receptacle Lock) (3 Pin) | 1 |
231-8562 Switch Gp-Disconnect -Custom
| 18***88 | Bolt | 2 |
| 18***89 | Washer; (6.4x12.5x1.6-mm Thk) | 4 |
| 19***63 | Nut; (M6x1-Thd) | 2 |
125-1302 Switch Gp-Magnetic
| 01***80 | Lockwasher | 2 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 12***02 | Switch Group-Magnetic; -Starting Motor, Start Relay | 1 |
167-0138 Switch Gp-Magnetic
| 15***70 | Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 16***38 | Switch Group-Magnetic; -Main Relay-Main Power Relay | 1 |
| 3E***62 | Wedge-Plug Lock; (2-Pin) | 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 |
197-6476 Switch Gp-Secondary Steering
| 14***01 | Switch As-Rocker; (Secondary Steering Test) | 1 |
| 14***02 | Actuator-Rocker | 1 |
| 14***03 | Switch As-Rocker; (Secondary Steering Test) | 1 |
197-6888 Wiring Gp-Air Conditioner
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 11***33 | Switch As-Pressure; (A/C) | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 2 |
135-6782 Wiring Gp-Ride Control
| 13***00 | Clip; (Tab) | 1 |
| 13***01 | Clip | 1 |
| 13***82 | Wiring Group-Ride Control; (Ride Control) | 1 |
184-7259 Wiring Gp-Secondary Steering
| 03***48 | Clip; (11.11mm .437in Id) | 2 |
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 10***05 | Kit-Receptacle; (6-Pin)(Display Monitor Harness) | 1 |
Frame And Body
195-9833 Pin Gp-Hood -Custom
| 12***30 | Pin Assem. (R. H.) | 1 |
| 12***31 | Pin Assem. (L. H.) | 1 |
| 19***21 | Pin As; (Rh) | 1 |
205-4512 Protection Ar-Hardware -Custom
| 14***35 | Bolt | 2 |
| 14***36 | Bolt | 11 |
| 16***76 | Bolt | 6 |
Hydraulic System
221-1758 Accumulator Gp-Ride Control
| 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 |
223-2264 Control Ar-Ride -Custom
| 13***97 | Bracket | 1 |
| 13***57 | Tube Assem. | 1 |
| 14***25 | Bracket | 1 |
231-8596 Control Gp-Ride -Custom
| 13***82 | Wiring Group-Ride Control; (Ride Control) | 1 |
| 14***03 | Valve & Mtg Group-Main Control; -2-Function | 1 |
| 14***56 | Lines Group-Pilot | 1 |
231-8597 Lines Gp-Front -Custom
| 13***66 | Tube As | 1 |
| 13***67 | Tube As | 1 |
| 13***68 | Tube As | 1 |
232-3110 Lines Gp-Pilot -Custom
| 14***36 | Bolt | 1 |
| 16***75 | Bolt | 2 |
| 19***63 | Washer | 3 |
222-1489 Lines Gp-Ride Control
| 13***97 | Bracket | 1 |
| 13***26 | Hose Assem. | 1 |
| 13***57 | Tube Assem. | 1 |
161-8919 Motor Gp-Piston -Hydraulic Fan
| 03***81 | Bearing As-Needle | 1 |
| 11***34 | Plug-O-Ring; (9/16-18 Thd) | 1 |
| 11***35 | Seal-Shaft | 1 |
239-6776 Valve & Mtg Gp-Main Control -Custom
| 13***62 | Bracket Assem. | 1 |
| 13***59 | Tube Assem. | 1 |
| 13***73 | Manifold | 1 |
239-6778 Valve & Mtg Gp-Main Control -Custom
| 23***76 | Valve & Mtg Group-Main Control; -Custom | 1 |
| 23***78 | Valve & Mtg Group-Main Control; -Custom | 1 |
| 7X***15 | Washer-Hard; (17x35x5-mm Thk) | 2 |
232-0680 Valve & Mtg Gp-Main Control -Custom
| 13***62 | Bracket Assem. | 1 |
| 13***60 | Tube Assem. | 1 |
| 13***73 | Manifold | 1 |
232-0677 Valve & Mtg Gp-Main Control -Custom
| 23***77 | Valve & Mtg Group-Main Control; -Custom | 1 |
| 23***80 | Valve & Mtg Group-Main Control; -Custom | 1 |
| 7X***15 | Washer-Hard; (17x35x5-mm Thk) | 2 |
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 |
9t-3096 Valve Gp-Check -Ride Control
| 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 |
223-5975 Valve Gp-Diverter -Ride Control
| 15***40 | Valve Group-Solenoid; -Reversing Fan, Ride Control | 2 |
| 1S***42 | Spring | 1 |
| 20***37 | Retainer | 3 |
114-2788 Valve Gp-Main Control
| 00***63 | Seal-O-Ring; (55.24mm Id) | 3 |
| 09***91 | Bolt; (Locking) (M12x1.75x25mm) | 2 |
| 11***88 | Valve Group-Main Control | 1 |
232-2292 Valve Gp-Main Control
| 00***63 | Seal-O-Ring; (55.24mm Id) | 3 |
| 09***91 | Bolt; (Locking) (M12x1.75x25mm) | 2 |
| 11***88 | Valve Group-Main Control | 1 |
239-6775 Valve Gp-Main Control
| 00***63 | Seal-O-Ring; (55.24mm Id) | 2 |
| 09***91 | Bolt; (Locking) (M12x1.75x25mm) | 2 |
| 11***88 | Valve Group-Main Control | 1 |
144-0115 Valve Gp-Pilot -Oil Manifold
| 11***68 | Valve Group-Sequence; -Float | 1 |
| 14***15 | Valve Group-Pilot; -Oil Manifold | 1 |
| 15***91 | Valve Group-Pressure Reducing; -Lowering Control | 1 |
154-0191 Valve Gp-Pressure Reducing
| 15***91 | Valve Group-Pressure Reducing; -Lowering Control | 1 |
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
| 5P***99 | Ring-To Clutch Piston Pins | 1 |
154-8871 Valve Gp-Pressure Reducing
| 15***71 | Valve Group-Pressure Reducing; -Lowering Control | 1 |
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
| 5P***99 | Ring-To Clutch Piston Pins | 1 |
4t-4162 Valve Gp-Relief -Line
| 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 |
4t-4935 Valve Gp-Relief
| 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-2742 Valve Gp-Relief -Line
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 2 |
| 4T***41 | Spring | 1 |
| 4T***42 | Valve Group-Relief; -Secondary Steering | 1 |
4t-4934 Valve Gp-Relief
| 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 |
6e-6003 Valve Gp-Relief -Main
| 11***15 | Dowel | 1 |
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 1 |
| 4J***22 | Seal-Interface Between 3rd & Tilt Valve | 1 |
114-2789 Valve Gp-Relief
| 11***89 | Valve Group-Relief | 1 |
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 1 |
| 4J***22 | Seal-Interface Between 3rd & Tilt Valve | 1 |
4t-6103 Valve Gp-Relief
| 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 |
6e-2377 Valve Gp-Relief -Line
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 2 |
| 4T***41 | Spring | 1 |
| 4T***71 | Plate | 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 |
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 |
152-8340 Valve Gp-Solenoid
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 11***43 | Locknut; (5/16-18-Thd) | 2 |
| 15***38 | Cartridge Assem. | 1 |
Machine Arrangement
195-1877 Conversion Gp-Machine -Custom
| 10***96 | Pin-Keeper | 1 |
| 11***55 | Pin Assem. | 1 |
| 11***91 | Bracket Assem. | 2 |
232-1475 Protection Ar-Corrosion -Custom
| 18***15 | Transmission Ar; -Freewheel Stator Torque Converter | 1 |
| 18***66 | Radiator & Fan Group | 1 |
| 19***67 | Plate & Film Group; -Custom | 1 |
205-4502 Protection Ar-Corrosion -Custom
| 18***17 | Transmission Ar; -Freewheel Stator Torque Converter | 1 |
| 18***66 | Radiator & Fan Group | 1 |
| 19***67 | Plate & Film Group; -Custom | 1 |
Operator Station
223-2269 Air Conditioner Ar -Custom
| 11***93 | Plate; (Instruction) (On Right Side Behind Cab Door) | 1 |
| 18***21 | Air Conditioner Ar | 1 |
| 19***88 | Wiring Group-Air Conditioner | 1 |
200-7503 Air Conditioner Gp -Custom
| 18***93 | Heater Group-Cab | 1 |
| 19***21 | Lines Group-Air Conditioner | 1 |
| 20***03 | Air Conditioner Group; -Custom | 1 |
220-4169 Lines Gp-Air Conditioner
| 10***00 | Fitting As-Air Conditioner; (Quick Disconnect)(Refrigerant) | 2 |
| 10***81 | Clamp Assem. | 1 |
| 10***97 | Valve As; (Low Side) | 1 |
232-7683 Lines Gp-Air Conditioner -Custom
| 10***81 | Clamp Assem. | 1 |
| 1P***56 | Plate | 1 |
| 20***02 | Clamp As | 1 |
193-3121 Lines Gp-Air Conditioner
| 10***93 | Valve As | 1 |
| 10***94 | Gasket | 1 |
| 10***95 | Valve As | 1 |
Power Train
116-6128 Case & Parts Gp-Planetary
| 11***94 | Tube Assem. | 1 |
| 11***28 | Case & Parts Group-Planetary | 1 |
| 12***23 | Bracket Assem. | 1 |
199-3323 Control Gp-Transmission Hyd
| 06***40 | Seal-O-Ring (Id=37.69mm) | 1 |
| 11***26 | Sensor Group-Temperature; -Transmission Oil | 1 |
| 13***00 | Clip; (Tab) | 2 |
223-4459 Gear Gp-Output Transfer
| 11***31 | Cage-Bearing | 1 |
| 11***65 | Yoke Assem. | 2 |
| 12***28 | Cage Assem. | 1 |
196-1800 Planetary Gp-Transmission
| 06***11 | Ring-Retaining | 1 |
| 06***61 | Ring-Retaining | 1 |
| 06***93 | Ring-Retaining | 1 |
196-1799 Planetary Gp-Transmission
| 06***11 | Ring-Retaining | 1 |
| 06***61 | Ring-Retaining | 1 |
| 06***93 | Ring-Retaining | 1 |
124-6662 Pump Gp-Transmission
| 12***12 | Manifold Assem. | 1 |
| 12***62 | Pump Group-Transmission | 1 |
| 12***94 | Cover As-Oil Pump | 1 |
183-7432 Torque Converter & Housing Gp
| 0S***79 | Bolt 5.08 cm(2 In.) Long | 1 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 8 |
| 12***79 | Flange-Pump Drive | 1 |
177-7083 Torque Converter Gp
| 06***43 | Ring-Snap | 1 |
| 11***27 | Ball Bearing | 1 |
| 14***21 | Gear-Pump Drive; (67-Teeth) | 1 |
180-9115 Transmission Ar
| 11***28 | Case & Parts Group-Planetary | 1 |
| 12***62 | Pump Group-Transmission | 1 |
| 14***68 | Gear Group-Output Transfer | 1 |
233-7333 Transmission Ar -Custom
| 15***40 | Grease-Dielectric | 1 |
| 18***17 | Transmission Ar; -Freewheel Stator Torque Converter | 1 |
| 23***33 | Transmission Ar; -Custom | 1 |
180-9117 Transmission Ar
| 11***28 | Case & Parts Group-Planetary | 1 |
| 12***62 | Pump Group-Transmission | 1 |
| 18***17 | Transmission Ar; -Freewheel Stator Torque Converter | 1 |
233-7334 Transmission Ar -Custom
| 13***09 | Tube-Heat Shrink; (32-mm Dia)(16-cm) | 0 |
| 13***10 | Tube; (12-cm) | 0 |
| 15***40 | Grease-Dielectric | 1 |
160-8408 Valve Gp-Modulating -Transmission Clutch
| 14***44 | Coil Assem. | 1 |
| 16***08 | Valve Group-Modulating; -Torque Converter Lockup Clutch | 1 |
| 16***08 | Washer; (13.03x25.4x2.38-mm Thk) | 1 |
202-8933 Valve Gp-Relief -Transmission Hydraulic Control
| 11***00 | Body | 1 |
| 1M***51 | Spring-Steering Clutch | 1 |
| 20***05 | Cover | 1 |
130-5485 Valve Gp-Relief -Torque Converter Outlet
| 13***85 | Valve Group-Relief; -Torque Converter Outlet | 1 |
| 2S***82 | Spring | 1 |
| 2S***84 | Spool Assembly, Comprising: | 1 |
Service Equipment And Supplies
195-1875 Cover Gp-Protection -Custom
| 19***71 | Lever | 1 |
| 19***72 | Cover | 1 |
| 19***73 | Cap As-Filler | 1 |
194-7867 Plate & Film Gp -Custom
| 13***59 | Plate-Identification; (Engine Stop, Run) | 0 |
| 18***52 | Plate-Hood; (Hood) | 1 |
| 19***67 | Plate & Film Group; -Custom | 1 |
Steering System
223-2266 Conversion Ar-Secondary Steer -Custom
| 14***43 | Tube Assem. | 1 |
| 14***55 | Bracket | 1 |
| 14***34 | Bracket | 1 |
146-1547 Lines Gp-Secondary Steering
| 14***97 | Valve Group-Secondary Steering | 1 |
| 14***14 | Flange | 1 |
| 14***36 | Hose Assem. | 1 |
177-2921 Pump & Motor Gp-Sec Steering
| 11***68 | Gasket | 1 |
| 17***21 | Pump & Motor Group-Sec Steering | 1 |
| 18***65 | Kit-Service; (Secondary Steering Pump) | 1 |
234-4892 Pump & Motor Gp-Sec Steering -Custom
| 10***05 | Kit-Receptacle; (6-Pin)(Display Monitor Harness) | 1 |
| 15***69 | Plug As-Connector; (2-Pin) | 1 |
| 18***61 | Harness Assembly-Secondary Steering | 1 |
237-9875 Pump & Motor Gp-Sec Steering
| 11***68 | Gasket | 1 |
| 18***67 | Motor Group-Electric; (Secondary Steering) | 1 |
| 18***70 | Relay; (Secondary Steering Motor), Washer, Washer; Din 7989 | 1 |
146-1553 Pump & Mtg Gp-Secondary Steer
| 14***53 | Pump & Mtg Group-Secondary Steer | 1 |
| 14***55 | Bracket | 1 |
| 14***34 | Bracket | 1 |
231-8595 Steering Gp-Secondary -Custom
| 14***47 | Lines Group-Secondary Steering | 1 |
| 14***53 | Pump & Mtg Group-Secondary Steer | 1 |
| 18***59 | Wiring Group-Secondary Steering; (Secondary Steering) | 1 |
141-2597 Valve Gp-Secondary Steering
| 10***10 | Valve-Check; (Steering) | 2 |
| 10***11 | Plug; (5/16-12 Thd) | 2 |
| 14***97 | Valve Group-Secondary Steering | 1 |
972G II serial number reference
The PIN/serial plate is riveted to the loader frame on the left-hand side, generally near the front axle behind the left front tire, with the number also stamped into the frame itself. Read the first three letters as the build/model prefix (e.g. AXN) and the following five digits as the sequential unit number within that block; on the full 17-character PIN used from 2001 onward this same 3-letter code sits inside the longer string. Match parts and service literature to the prefix, not just the model name - Caterpillar splits electrical, transmission and parts documentation by these prefix blocks rather than by calendar year.
| Prefix | Identifies | Notes |
|---|---|---|
| AWY | 972G Series II | Early production block for the Series II line. Covered in the same electrical-system service manual as AXC, AXJ and AXN. 3196 ATAAC diesel with ADEM III engine control, EPA Tier II rating. |
| AXC | 972G Series II | Grouped with AWY, AXJ and AXN in the Series II electrical-system manual, and separately with AXE and AXJ in the operation and maintenance manual. Also has its own dedicated parts catalog for the 3196 engine. Same 3196 ATAAC / ADEM III powertrain as the rest of the Series II line. |
| AXE | 972G Series II | Has its own dedicated service-manual set (transmission section documented separately), and also appears with AXC and AXJ in the operation and maintenance manual and with AXN/AWP/AXC in the parts manual. Same 3196 ATAAC engine family as other Series II prefixes. |
| AXJ | 972G Series II | Grouped with AWY, AXC and AXN in the Series II electrical-system manual, and with AXC and AXE in the operation and maintenance manual. No standalone dedicated manual listing found for this prefix alone, but it is consistently named alongside the other confirmed Series II prefixes in the OEM manual's documented scope. |
| AXN | 972G Series II | Later block in the AWY/AXC/AXJ/AXN electrical-system manual group; also has its own dedicated parts-catalog listing. 3196 ATAAC, ADEM III, net power about 201 kW (270 hp), EPA Tier II. |
| AWP | 972G Series II | Has its own dedicated parts and service manual set, separate from the AWY/AXC/AXJ/AXN/AXE block; also named directly under the Series II model in a Product Link communication-harness install scope. One listing dates this block to 1999, which is earlier than the Series II's documented production start around 2001 - confirm with dealer before relying on that year. |
Frequently asked questions
What engine powers the Caterpillar 972G Series II wheel loader?
The 972G Series II uses the Cat 3196 ATAAC diesel: a six-cylinder, turbocharged, air-to-air aftercooled engine with ADEM III electronic control, rated at roughly 201 kW (270 hp) net and meeting EPA Tier II. This differs from the earlier plain 972G, which ran a mechanically governed Cat 3306 engine.
What is the operating weight of the Cat 972G Series II?
Operating weight runs approximately 24,855-26,900 kg (54,800-59,300 lb) depending on bucket, tire, and counterweight configuration. General-purpose, high-lift, and waste-handler setups all fall within this range.
What replaced the Caterpillar 972G Series II?
The Cat 972H succeeded the 972G Series II, arriving around 2006 with a C13 ACERT engine, after the 972G Series II's production run ended around 2005.
What 972G II owners discuss
Why would a 972G II suddenly stop moving even though the engine keeps running?
What wear patterns are typical on the axles, brakes, and loader linkage?
What quirks come with the engine in the 972G II?
What electrical and sensor faults come up most often?
The ride control feels soft or bottoms out over rough ground. What is going on?
Is a hydraulic pump whine on cold start-up something to worry about?
What should I check before buying a used 972G II?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific 972G II part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.