Caterpillar 485
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar 485 (Cat LEXION 485) is a large rotary combine harvester built through the Caterpillar-Claas joint venture at the Omaha, Nebraska plant, pairing Claas's Accelerated Pre-Separation (APS) threshing system and twin-rotor rotary separator with a Caterpillar diesel and Cat's own Mobil-trac rubber-belted track undercarriage. Earlier production (roughly 1999-2001) used a Cat 3176 or 3176C ATAAC turbocharged, air-to-air aftercooled inline-six, 10.3 L, rated 261-272 kW (350-365 hp) gross; the later 485R update carried a Cat C-12 inline-six, 12.0 L, installed in the combine at roughly 298 kW (400 hp). Transport weight for the 480R/485R pair runs about 15,300 kg (33,730 lb) in base configuration up to roughly 18,300 kg (40,340 lb) fully equipped, varying with header, tank load and options. The 485 was the flagship tracked model of Cat's first Lexion-based lineup, sold alongside a wheeled twin (the 480) and smaller siblings (465, 470, 475), in base and R-series trim, with an optional rear-wheel-assist (RWA) drive, a choice of an earlier basic monitor or the later CEBIS on-board display, and a chopper/spreader residue package, all built around a common feederhouse compatible with grain platforms, row-crop corn heads and draper headers.
The clearest running change on the 485 is the engine: original 3176/3176C ATAAC production gave way to the C-12 in the 485R update, alongside a stronger rotor-drive package and a move from the earlier basic cab monitor to CEBIS. Because Caterpillar sold its stake in the joint venture in 2002, the 485/485R generation was the last full Cat-owned combine line before production shifted to the Lexion 500 series (roughly 2003-2008), which stayed in Cat-yellow under license before Claas moved the brand fully to its own name around 2010. That makes the 485 a closed-production, orphaned-badge machine today: no factory Cat combine dealer network stands behind it, and parts, service information and rebuild expertise now run through Claas and the aftermarket combine-parts trade rather than Cat itself. In the used market it still draws interest for its Mobil-trac flotation in wet ground and its APS/rotary threshing capacity, but buyers price it on rotor, engine and undercarriage condition, verified against a grease and service history, rather than on any remaining OEM support — and on confirming whether a given unit is the 3176C ATAAC 485 or the C-12 485R, since the two are not fully parts-interchangeable.
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 485 specifications
Engine
| Series identity | The 485 is the crawler-track (Mobil-trac undercarriage) partner to the wheeled 480 in this Cat-branded combine line, built through the early-2000s Cat-Claas joint venture. A later 485R update revised the rotor-drive package and cab electronics alongside a running engine change; both share the same threshing and separation systems. |
| Engine model | Early production carries a Caterpillar 3176 or 3176C ATAAC turbocharged, air-to-air aftercooled six-cylinder diesel. The later 485R update carries a Caterpillar C-12 six-cylinder diesel, both with electronic engine management. Confirm which engine a specific unit has from its model/serial plate before ordering parts. |
| Displacement / cylinders | Six cylinders in both cases: the earlier engine is in the 10 L displacement class, the later C-12 update in the 12 L displacement class. |
| Rated (gross) power | Earlier 3176/3176C ATAAC-powered units: 261-272 kW (350-365 hp). Later C-12-powered 485R update: roughly 298 kW (400 hp) as installed in the combine. Higher truck/industrial C-12 ratings up to about 321-331 kW (430-445 hp) are published for that engine family but do not apply to this combine's own rating. |
| Power bulge (high-capacity mode) | Not documented as a combine-specific bulge separate from the rated figures above. |
| Emissions tier | Not stated in the factory literature reviewed for this 2001-era model. Predates most nonroad emissions-tier certification requirements for this engine class — confirm with dealer records if compliance documentation is needed. |
Weights
| Configuration note | Factory transport-weight figures are published for the 480 R/485 R pair together and vary with tire size, undercarriage choice (wheels vs Mobil-trac tracks) and attachments. Treat the figures below as a configuration-dependent range, not a single fixed weight. |
| Transport weight, base configuration | 15,300 kg (33,730 lb). |
| Transport weight, fully configured | 18,300 kg (40,340 lb). |
| Ground pressure | No PSI figure published. Factory literature states the Mobil-trac track undercarriage spreads machine weight over a larger footprint than wheels, lowering ground pressure and soil compaction versus the wheeled 480 R. |
Dimensions
| Overall length | 9.12 m (30 ft). |
| Overall width (across tracks) | 4.255 m (14 ft). |
| Overall height, maximum | 4.88 m (16 ft). |
| Body height, secondary reference | 3.91 m (12 ft 10 in). |
| Track roller spacing | 1.825 m (72 in). |
| Track shoe width | 889 mm (35 in). |
| Threshing cylinder width | 1700 mm (67 in), a class-defining dimension for this combine's threshing system. |
| Unloading auger clearance height | About 4 m (13 ft), sized to clear tall grain carts and trucks. |
| Ground clearance / wheelbase | Not published. The tracked undercarriage has no conventional wheelbase, and a numeric ground-clearance figure is not given in the factory literature reviewed. |
Performance
| Ground drive | Variable hydrostatic ground drive with three-speed Servo-Shift transmission. |
| Travel speed | Not published in the factory literature reviewed for this Cat-engine configuration. Verify a road-speed figure with the operator's manual before quoting one. |
| Main threshing cylinder speed | 395 to 1150 rpm standard (small-grain setup). An optional two-speed drive adds a low range of 166 to 483 rpm and is standard on corn and rice setups. |
| Rotor speed settings | Fixed multi-speed settings of 500/640/800 rpm (corn) or 640/800/962 rpm (small grain and rice). An optional variable-speed rotor drive covers 360 to 1050 rpm, with a further optional 300 rpm kit for very slow speeds. |
| Slope operation (optional 3-D sieve) | Maintains full cleaning output on side slopes up to 20 percent grade. |
| Grain tank capacity | 280 bu (10,000 L). |
| Unloading rate | 2.7 bu/sec (95 L/sec). |
Service capacities (summary)
| Fuel tank | 650 L (170 US gal). |
| Hydraulic system | Not published in the factory literature reviewed. Consult dealer service documentation for the exact reservoir capacity. |
| Engine oil | Not confirmed specifically for either engine's combine installation (see the fluids & lubricants section for engine-family-based capacity guidance) — verify against the combine's own service manual for the engine actually fitted. |
| Cooling system | Not published in the factory literature reviewed for either engine's combine installation — verify against the combine's own service manual or radiator cap plate for the engine actually fitted. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
485 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) — earlier 3176/3176C ATAAC-powered 485 (10.3 L); later C-12-powered 485R update not separately documented | approx. 28–30 L (7.5–8 US gal) for the 3176-family engine; figure drawn from the engine-family lube system spec, exact combine-installed sump figure not separately confirmed. The C-12-powered 485R update likely differs — verify with your dealer or the OMM | Cat Diesel Engine Oil (Cat DEO), SAE 15W-40 for general service; switch to Cat DEO Cold Weather (SAE 10W-30) in sub-zero climates. Meets Cat diesel engine oil spec / API CI-4 heavy-duty diesel service. |
| Cooling system | engine block/jacket capacity approx. 45 L (12 US gal) for the earlier 3176 engine family; total combine system capacity including radiator and header-drive cooling package is not confirmed in available sources and runs higher. The later C-12-powered 485R update is not separately documented — verify against the OMM or radiator cap plate for the engine actually fitted | Cat Extended Life Coolant (ELC), full-strength premix rated to roughly -37°C (-34°F). If using a conventional low-silicate coolant instead of ELC, add the correct supplemental coolant additive (SCA) at service intervals. |
| Fuel tank | approx. 650 L (172 US gal) | No. 2-D diesel fuel; blend with No. 1-D (or use a winterized 1-D/2-D blend) below freezing to prevent fuel gelling and filter plugging. |
| Hydraulic system and tank | not documented in available sources for this exact model/serial range — verify with your dealer or the OMM capacities table | ISO VG 46 anti-wear hydraulic oil (Cat HYDO Advanced or equivalent); the OMM viscosity chart calls for a lighter-viscosity (ISO 32-type) oil for cold starts and standard ISO 46 for normal/warm operating temperatures. |
| Transmission / hydrostatic ground drive | not documented in available sources for this exact model/serial range — verify with your dealer or the OMM capacities table | Universal-type transmission/hydraulic oil common to the drive circuit (UTTO-type), or Cat TDTO (Transmission/Drive Train Oil) where the OMM specifies a separate drivetrain fill; select viscosity by ambient temperature per the OMM chart. |
| Final drives, each (wheeled 485; Mobil-trac undercarriage final drive on 485R differs) | not documented in available sources — varies by wheeled vs. tracked (Mobil-trac) configuration; verify with your dealer or the OMM capacities table | SAE 80W-90 GL-4/GL-5 gear oil for planetary final drives, or Cat TDTO where the final drive shares the hydraulic/transmission circuit per the OMM. |
| Grease (all chassis and driveline points) | not a fill capacity — applied per grease point per the OMM lubrication schedule | NLGI 2 multipurpose EP lithium-complex grease (Cat Advanced 3Moly or equivalent); no seasonal/climate viscosity split noted for grease in available sources. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 485 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 485 beyond the schedule
Predictive maintenance & fluid analysis
Run S·O·S oil sampling at every oil change on whichever Cat diesel is fitted — 3176C ATAAC on earlier 485s, C-12 on the 485R update. Both use a HEUI system drawing actuation oil from the sump, so degraded oil shows as injection-pressure trouble before power loss. Sample hydraulic and rotor-gearbox oil the same way, and watch charge-air cooler and radiator condition; packed chaff shows first as boost loss and rising coolant temperature. Log rotor-bearing grease purges — dry, caked grease at the seal is the earliest warning of bearing failure.
Corrective & common repairs
Known repeat failures on this line: corroded harness connectors causing multi-sensor false alarms, a cycling or squawking hydraulic fan drive at idle traced to the fan-control valve or speed sensor rather than the fan clutch, and front-engine idler-pulley bearings wearing out early on 3176/3176C-powered units. The splined coupler between the rotor-drive gearboxes wears steadily and should be checked at every gearbox service, not ignored. Variable-speed drive-sheave bushings and rotor bearings both fail by gradual wear — catch play or dry grease early rather than running either to failure mid-harvest.
Overhaul & rebuild points
High-hour 485s wear hardest at the threshing and separation system: concave/grate clearance, rotor bearings, and cleaning-shoe sieve and shoe bushings, which commonly need replacement around 1500 separator hours regardless of appearance. Rotor-drive gearboxes and their splined couplers, unload/cross-auger flighting, and impeller fins are common rebuild points, especially on machines run heavily in tough crops like green-stem soybeans. On tracked units, renew Mobil-trac belts, mid-rollers and idler wheels together as a set — mismatched wear between old and new components shortens the life of whatever goes in fresh.
Seasonal & environment servicing
Chaff packed against the radiator, charge-air cooler and alternator builds up fast in dry harvest conditions — clear it daily or risk overheating and preventable alternator failure, both repeat complaints on this model. Before winter storage, drain and stabilize fuel, bring coolant to full antifreeze protection, and slack off Mobil-trac and header drive-belt tension to avoid flat-spotting. The Mobil-trac undercarriage is why this model beats its wheeled 480 sister in wet ground, but mid-rollers still need regular mud and trash clearing to stop packing that accelerates belt wear.
485 common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 1R-0762 | Filter As-Fuel | Fuel system service | Check fitment → |
| 111-2645 | Valve-Pump Bypass | Lubrication service | Check fitment → |
| 8M-3182 | Spring,Helical,Comp Engine Oil Filter Assembly | Lubrication service | Check fitment → |
| 1R-0716 | Filter As-Engine Oil | Lubrication service | Check fitment → |
| 119-3025 | Filter | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
485 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| 164-03 / 164-04 (CID 164) | Injector (injection) actuation pressure circuit reading above (03) or below (04) normal, or erratic (02) | Failing injection actuation pressure control valve or HEUI pump, low/contaminated engine oil feeding the high-pressure oil system, or a damaged sensor connector | Check engine oil level and condition first since the HEUI system draws from it, then inspect the sensor wiring before testing the actuation pressure control valve and pump |
| 100-01 (CID 100) | Engine oil pressure reading below normal for the current rpm | Low oil level, plugged oil filter, worn oil pump, or a failed oil pressure sensor | Check oil level and filter condition before condemning the sensor or pump; verify actual reading against a mechanical gauge |
| 110-00 (CID 110) | Engine coolant temperature above normal operating range | Low coolant, chaff/dust-clogged radiator or aftercooler fins (common on combine duty), fan drive fault, or a failed coolant temp sensor | Shut down and let cool, clear debris from radiator screens and cooling package, check coolant level, then verify sensor circuit if the warning persists |
| 190-08 (CID 190) | Engine speed/timing sensor signal abnormal (frequency, pulse width, or period out of range) | Sensor air gap out of spec, sensor damage, or wiring/connector damage from vibration and chaff intrusion | Inspect sensor air gap and connector, then confirm signal quality with Cat ET before replacing the sensor |
| 342-08 (CID 342) | Secondary (redundant) engine speed/timing sensor signal abnormal | Same failure modes as the primary timing sensor circuit: air gap, sensor damage, or wiring fault | Inspect wiring and connector and sensor air gap; confirm with Cat ET before parts replacement |
| 253-02 (CID 253) | Personality module (ECM calibration) incorrect, corrupted, or mismatched | Wrong or corrupted engine calibration file, or an ECM fault following a reflash | Verify and reload the correct engine calibration with Cat ET; replace the ECM only if a reflash does not clear it |
| 248-09 (CID 248) | Cat Data Link communication abnormal (loss of update between the engine ECM and connected displays/modules) | Damaged data link wiring or connectors, or an ECM fault | Check data link wiring and connectors between the engine ECM and cab instrumentation before swapping modules |
| CAN-BUS wiring/communication fault (plain-text CEBIS message, not a numeric code) | Loss of communication on the combine's own chassis control network, separate from the engine ECM; can also corrupt displayed readings such as fuel level or coolant temperature | Damaged CAN-bus wiring or connectors, or a failed control module on the grain-handling, header, or drive network | Inspect CAN-bus wiring and connector junctions between modules, then isolate the faulted module using the Claas diagnostic tool |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
485 attachments & work tools
Grain/flex platforms
Small-grain platforms in roughly 6-9 m (20-30 ft) working widths pair with this combine class, mounted on the feederhouse via the header quick-coupling frame. Reel height, fore-aft position and cutterbar float are hydraulically adjustable from the cab.
Corn heads
Row-crop corn heads for this class run in the 6 to 12-row range on 76 cm (30 in) spacing, folding hydraulically for road transport. Header drive and deck-plate adjustment run off the combine's own hydraulics through the feederhouse coupling.
Draper headers
Flexible draper headers up to roughly 9-11 m (30-36 ft) are used on this size of machine for soybeans, canola and small grains, giving a wider swath than the flex platform. They use the same feederhouse quick-coupling and reel-drive hookup as the grain platform; exact width offered varies by configuration/series and model year.
Header coupling and controls
Headers attach to the feederhouse through a quick-coupling header frame, with reel drive, header lift/float, and, on variable-cutterbar (Vario-type) headers, knife-position adjustment run hydraulically and controlled from the armrest. Vario-type headers need the combine's extra hydraulic/electric header circuit to power in-cab cutterbar-length adjustment.
Aftermarket header adapters
Adapter frames exist in the aftermarket to mount other-brand, row-crop-pattern headers onto this feederhouse for operators wanting to run a non-factory front. Factory-matched headers remain the direct-fit option with no adapter needed.
Unloading and grain handling
Grain tank capacity is documented at roughly 9,968 L (280 US bu) with an unloading rate near 95 L/sec (2.7 bu/sec) through a folding, swing-out unloading auger. A floating clean-grain filling auger loads the tank evenly from the middle outward.
Straw and residue management
A hydraulically driven chaff spreader/chopper option handles crop residue behind the separator, with chop intensity adjustable for tillage or no-till residue management. A revised wide-spread chopper is reported as a running-change option introduced partway through this model's production; treat exact introduction year as varying by source.
Undercarriage / traction options
This model is built around a rubber-belted track undercarriage (Mobil-trac type) for flotation and side-hill stability in wet fields. A rear-wheel-assist (RWA) hydraulic drive option is documented for this model to add rear traction and reduce wet-brake wear when running on tracks.
Cab electronics / monitor package
Two control/monitor packages are documented across this model's production: an on-board computer display (CEBIS-type) and an earlier, simpler monitor (IMO-type), with the newer display described by operators as more user-friendly. This is a factory/model-year configuration choice rather than a bolt-on attachment.
Cleaning-shoe hillside leveling
A 3-D slope-compensation system for the cleaning shoe, adjustable from the cab, is documented as a factory feature for maintaining sieve performance on sidehill ground.
Feederhouse reverser
The header and feederhouse can be run in reverse from the cab to clear plugged crop material. This is a standard operational/guarding feature on this model rather than a separate attachment.
Engine/power configuration
Documented engine output for this model ranges from about 272 kW (365 hp) up to roughly 300 kW (400 hp) depending on model year and series update, both using a Caterpillar diesel. Treat this as varying by configuration/series rather than a single fixed rating.
All 485 assemblies by section
Every catalogued assembly group for the Caterpillar 485. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Air Inlet And Exhaust System
4p-2881 Cartridge Gp-Turbocharger
| 11***30 | Nut-Compressor | 1 |
| 11***46 | Shaft As-Turbine | 1 |
| 4P***81 | Cartridge Group-Turbocharger | 1 |
117-2755 Manifold Gp-Exhaust
| 10***13 | Gasket | 6 |
| 11***15 | Stud-Taperlock; (M10x85-mm Oal) | 12 |
| 11***55 | Manifold Group-Exhaust | 1 |
116-5405 Manifold Gp-Inlet
| 11***05 | Manifold Group-Inlet | 1 |
| 11***06 | Manifold; (Inlet) | 1 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 1 |
133-7027 Turbocharger Gp
| 13***27 | Turbocharger Group | 1 |
| 13***35 | Turbocharger Group | 1 |
| 1P***51 | Gasket; (Turbocharger) | 1 |
136-4835 Turbocharger Gp
| 10***28 | Cover-Compressor | 1 |
| 10***79 | Housing-Turbine | 1 |
| 13***35 | Turbocharger Group | 1 |
Basic Engine
115-9382 Camshaft Gp
| 11***82 | Camshaft Group | 1 |
| 11***59 | Cover | 1 |
| 12***11 | Journal | 1 |
117-2791 Cover Gp-Air Compressor
| 11***18 | Cover | 1 |
| 11***19 | Gasket | 1 |
| 11***91 | Cover Group-Air Compressor | 1 |
115-2985 Cover Gp-Cylinder Block
| 11***85 | Cover Group-Cylinder Block | 1 |
| 4P***87 | Cover | 1 |
| 6V***50 | Seal-O-Ring (Id=39.34mm) | 1 |
136-4307 Cover Gp-Front Housing
| 13***07 | Cover Group-Front Housing; -Hydraulic Pump Drive | 1 |
| 1H***39 | Packing,Preformed Cover Part Of Kit P/N 4j***80 | 1 |
| 4P***50 | Cover | 1 |
117-2743 Crankshaft Gp
| 11***07 | Plate; (Thrust) | 2 |
| 11***08 | Bearing-Main; (Standard) | 4 |
| 11***09 | Bearing-Main; (Standard) | 3 |
148-2062 Cylinder Block As
| 11***66 | Cap; (Bearing) | 7 |
| 12***16 | Bearing; (Sleeve) | 5 |
| 12***17 | Bearing-Sleeve; (Narrow) | 1 |
128-0407 Cylinder Block As
| 11***66 | Cap; (Bearing) | 7 |
| 12***07 | Cylinder Block As | 1 |
| 12***16 | Bearing; (Sleeve) | 5 |
148-2095 Cylinder Block As
| 10***60 | Seal; (Liner) | 6 |
| 14***62 | Cylinder Block As | 1 |
| 14***95 | Cylinder Block As | 1 |
204-3450 Cylinder Block As
| 10***60 | Seal; (Liner) | 6 |
| 14***25 | Liner-Cylinder Block | 6 |
| 16***63 | Shim-Liner; -Cylinder | 0 |
144-2958 Cylinder Block As
| 10***60 | Seal; (Liner) | 6 |
| 12***07 | Cylinder Block As | 1 |
| 14***58 | Cylinder Block As | 1 |
200-2054 Cylinder Block As
| 11***66 | Cap; (Bearing) | 7 |
| 17***54 | Bolt-Hex Head; (M16x160mm) | 14 |
| 20***54 | Cylinder Block As | 1 |
115-2982 Cylinder Block Gp
| 11***82 | Cylinder Block Group | 1 |
| 14***95 | Cylinder Block As | 1 |
| 1N***99 | Plug-O-Ring; (Straight Thread) | 2 |
179-9459 Cylinder Head As
| 11***02 | Sleeve; (Injector) | 6 |
| 13***06 | Insert-Valve Seat; (Inlet)(Standard) | 12 |
| 17***53 | Insert-Valve Seat; (Exhaust)(Standard) | 12 |
144-2950 Cylinder Head As
| 11***02 | Sleeve; (Injector) | 6 |
| 13***97 | Insert-Valve Seat; (Exhaust) | 12 |
| 13***06 | Insert-Valve Seat; (Inlet)(Standard) | 12 |
148-2150 Cylinder Head As
| 11***02 | Sleeve; (Injector) | 6 |
| 13***97 | Insert-Valve Seat; (Exhaust) | 12 |
| 13***06 | Insert-Valve Seat; (Inlet)(Standard) | 12 |
116-1085 Cylinder Head Gp
| 11***85 | Cylinder Head Group | 1 |
| 14***67 | Cylinder Head Group | 1 |
| 16***86 | Gasket As-Cylinder Head | 1 |
144-2967 Cylinder Head Gp
| 10***50 | Guide-Valve; (Standard) | 24 |
| 12***93 | Valve-Exhaust | 12 |
| 14***50 | Cylinder Head As | 1 |
148-2149 Cylinder Head Gp
| 10***50 | Guide-Valve; (Standard) | 24 |
| 13***29 | Valve; (Exhaust) | 12 |
| 14***49 | Cylinder Head Group | 1 |
117-2766 Damper Gp
| 11***66 | Damper Group | 1 |
| 13***83 | Bolt-12 Point Head; (M10x1.5x30-mm) | 8 |
| 16***25 | Damper Assem. | 1 |
116-1083 Fastener Gp-Cylinder Head
| 11***83 | Fastener Group-Cylinder Head; (Cylinder Head) | 1 |
| 12***84 | Bolt; (Hex Head) (M16x2x160mm) | 26 |
| 2S***58 | Washer-Hard; (17x29x3-mm Thk)(Engine Brake) | 26 |
117-2792 Fastener Gp-Oil Cooler
| 11***92 | Fastener Group-Oil Cooler; -Engine | 1 |
| 6V***17 | Bolt; (M8x1.25x30-mm)(Location Z) | 1 |
| 9M***74 | Washer-Hard; (8.8x16x2-mm Thk)(Hard) | 1 |
145-9112 Flywheel Gp
| 14***53 | Flywheel As | 1 |
| 14***12 | Flywheel Group | 1 |
| 4N***14 | Gear; (113-Teeth)(Flywheel Starter) | 1 |
117-2750 Gear Gp-Front
| 11***50 | Gear Group-Front | 1 |
| 13***83 | Shaft | 1 |
| 13***86 | Gear As; (Idler) (71 Teeth) | 1 |
145-8287 Housing Gp-Flywheel
| 06***55 | Seal-O-Ring (Id=47.22mm) | 1 |
| 14***57 | Housing-Flywheel | 1 |
| 14***87 | Housing Group-Flywheel | 1 |
115-3006 Housing Gp-Front
| 11***06 | Housing Group-Front; (Front) | 1 |
| 11***24 | Gear; (Pump Drive) (34 Teeth) | 1 |
| 13***96 | Housing As; (Front) | 1 |
115-9386 Lifter Gp-Valve
| 0T***00 | Plug (.5625" Diameter) | 2 |
| 11***86 | Lifter Group-Valve; -Mechanism | 1 |
| 11***91 | Shaft As; (Lifter) | 1 |
148-2063 Lifter Gp-Valve
| 0T***00 | Plug (.5625" Diameter) | 2 |
| 11***91 | Shaft As; (Lifter) | 1 |
| 14***63 | Lifter Group-Valve; -Mechanism | 1 |
196-1329 Lifting Gp-Engine
| 19***31 | Plate-Lifting | 2 |
| 19***29 | Lifting Group-Engine | 1 |
| 5P***45 | Washer-Hard; (13.5x25.5x3-mm Thk)(Turbocharger Blanking Plate) | 6 |
117-2748 Lifting Gp-Engine
| 11***05 | Plate; (Lifting Eye) | 2 |
| 11***48 | Lifting Group-Engine | 1 |
| 5P***45 | Washer-Hard; (13.5x25.5x3-mm Thk)(Turbocharger Blanking Plate) | 6 |
138-2550 Mounting Gp-Fan Drive
| 12***64 | Stud; (M12x1.75x86.3-mm Oal) | 2 |
| 13***50 | Mounting Group-Fan Drive; (Short) | 1 |
| 5R***37 | Washer; (Seal) (1.27mm Thk) | 2 |
116-5408 Mounting Gp-Valve Mechanism
| 11***83 | Fastener Group-Cylinder Head; (Cylinder Head) | 1 |
| 11***08 | Mounting Group-Valve Mechanism | 1 |
| 17***68 | Bridge As-Valve; (Intake) | 12 |
126-0144 Pan Gp-Oil
| 06***58 | Seal-O-Ring; (Oil Pan Drain Plug) | 2 |
| 10***08 | Gasket; (Oil Pan) | 1 |
| 12***57 | Bell As; (Suction) | 1 |
116-5371 Piston & Rod Gp
| 10***42 | Skirt; (Piston) | 1 |
| 10***19 | Ring; (Piston) (Intermediate) | 1 |
| 11***71 | Piston & Rod Group | 1 |
138-2028 Plug Gp-Cylinder Block
| 13***28 | Plug Group-Cylinder Block | 1 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 1 |
| 6V***48 | Seal--O-Ring--To Governor Drive Housing | 1 |
117-0185 Plug Gp-Cylinder Block
| 11***85 | Plug Group-Cylinder Block; (Cylinder Block) | 1 |
| 6V***89 | Seal-O-Ring (Id=19.18mm) | 1 |
| 9S***06 | Plug (Front 5 Stem Main Control Valve) | 1 |
117-0165 Plug Gp-Cylinder Block
| 11***65 | Plug Group-Cylinder Block; -Oil Gallery, End | 1 |
| 3B***23 | Core Plug--Flywheel Housing Pinion Shaft Hole | 1 |
116-5452 Plug Gp-Front Housing
| 11***52 | Plug Group-Front Housing; (Front Housing) | 1 |
| 8L***86 | Seal-O-Ring (Id=16.36mm); (16.36-mm Id) | 1 |
| 9S***05 | Plug-O-Ring; (Straight Thread O-Ring) | 1 |
148-0772 Pulley Gp-Auxiliary Drive
| 14***72 | Pulley Group-Auxiliary Drive | 1 |
| 14***55 | Pulley | 1 |
| 8T***07 | Bolt; (M16x2.0x100mm) | 6 |
116-5444 Pulley Gp-Crankshaft
| 11***44 | Pulley Group-Crankshaft | 1 |
| 13***62 | Pulley | 1 |
115-9397 Rocker Arm Gp
| 09***14 | Pin; (Spring) | 1 |
| 11***97 | Rocker Arm Group | 1 |
| 11***98 | Arm; (Valve Rocker) (Exhaust) | 2 |
116-1091 Seal Gp-Crankshaft -Single Lip
| 10***80 | Seal-O-Ring (Id=177.17mm) | 1 |
| 11***91 | Seal Group-Crankshaft; -Single Lip | 1 |
| 16***23 | Cover | 1 |
129-2910 Support Gp-Engine
| 12***10 | Support Group-Engine | 1 |
| 17***27 | Support As-Front | 1 |
| 5P***45 | Washer-Hard; (13.5x25.5x3-mm Thk)(Turbocharger Blanking Plate) | 8 |
170-1094 Support Gp-Engine
| 13***32 | Support As-Engine | 1 |
| 17***94 | Support Group-Engine | 1 |
| 5P***45 | Washer-Hard; (13.5x25.5x3-mm Thk)(Turbocharger Blanking Plate) | 8 |
117-2749 Valve Mechanism Gp
| 10***42 | Base-Valve Mechanism Cover | 1 |
| 10***67 | Pushrod; (Valve) | 12 |
| 10***68 | Pushrod-Injector | 6 |
Cooling System
115-2990 Cooler Gp-Engine Oil
| 06***40 | Seal-O-Ring (Id=37.69mm) | 2 |
| 10***25 | Gasket | 1 |
| 11***90 | Cooler Group-Engine Oil; (Engine Oil) | 1 |
131-6642 Housing & Regulator Gp
| 13***42 | Housing & Regulator Group; -Engine Coolant Temperature | 1 |
| 13***43 | Housing As-Regulator | 1 |
| 3S***43 | Seal-Lip Type; (Water Temperature Regulator) | 1 |
116-5446 Lines Gp-Water
| 10***35 | Gasket | 1 |
| 11***46 | Lines Group-Water; -Water Pump Inlet Elbow | 1 |
| 11***57 | Elbow-Water Pump | 1 |
131-6644 Lines Gp-Water
| 11***97 | Gasket | 4 |
| 13***42 | Housing & Regulator Group; -Engine Coolant Temperature | 1 |
| 13***44 | Lines Group-Water; -Single Thermostat | 1 |
116-5460 Lines Gp-Water
| 10***08 | Flange | 1 |
| 10***95 | Tube | 1 |
| 11***60 | Lines Group-Water; -Bypass | 1 |
117-2789 Plug Gp-Water Lines
| 11***89 | Plug Group-Water Lines; -Engine Oil Cooler | 1 |
| 6V***27 | Seal-O-Ring (Id=8.92mm) | 1 |
| 8T***67 | Plug-Pipe; (Oil Cooler Bonnet Drain) | 1 |
117-2674 Pump Gp-Water
| 11***74 | Pump Group-Water | 1 |
| 17***00 | Pump Group-Water | 1 |
| 6V***21 | Bolt; (M8x1.25x80-mm) | 2 |
153-8053 Pump Gp-Water
| 10***09 | Impeller; (Pump) | 1 |
| 10***10 | Gasket | 1 |
| 10***12 | Shaft; (Water Pump) | 1 |
100-6944 Pump Gp-Water
| 10***44 | Pump Group-Water | 1 |
| 10***09 | Impeller; (Pump) | 1 |
| 10***10 | Gasket | 1 |
176-7000 Pump Gp-Water
| 10***10 | Gasket | 1 |
| 14***88 | Seal As; (Water Pump) | 1 |
| 17***94 | Washer | 1 |
Electrical And Starting System
124-2673 Control & Mtg Gp-Engine Elek
| 11***55 | Control Group-Engine Electronic; (Engine Electronic) | 1 |
| 12***73 | Control & Mtg Group-Engine Elek; (Engine Elek) | 1 |
| 5P***70 | Nut-Hard; (M8 X 1.25) | 1 |
145-1232 Control Gp-Eng Ratings Elek
| 14***32 | Control Group-Eng Ratings Elek | 1 |
115-3055 Control Gp-Engine Electronic
| 11***55 | Control Group-Engine Electronic; (Engine Electronic) | 1 |
| 12***74 | Screw-Pan Head; (8-32x9.52-mm) | 1 |
| 21***50 | Control Group-Engine Electronic | 1 |
117-2763 Harness As-Engine
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 4 |
| 11***63 | Harness As-Engine; -Electronic Control | 1 |
117-2785 Sensor Gp-Engine
| 10***40 | Sensor Group-Temperature; -Output Transfer Gear Oil | 2 |
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 10***08 | Kit; (Connecting Plug) (3 Pin) (Includes Plug As And Wedge) | 1 |
129-6628 Sensor Gp-Speed -Engine Speed/Timing
| 10***13 | Seal; (3 Pin Plug) | 1 |
| 12***28 | Sensor Group-Speed; -Engine Speed/Timing | 1 |
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 1 |
207-1524 Starting Motor Gp-Electric
| 03***23 | Bolt; (1/4-28x1-In) | 5 |
| 20***89 | Kit-Solenoid; (12-Volt)(Starting Motor) | 1 |
| 20***24 | Starting Motor Group-Electric | 1 |
101-8936 Starting Motor Gp-Electric
| 10***36 | Starting Motor Group-Electric | 1 |
| 15***25 | Gasket | 1 |
| 20***24 | Starting Motor Group-Electric | 1 |
148-0769 Switch Gp-Pressure
| 14***69 | Switch Group-Pressure | 1 |
| 6T***52 | Switch As-Pressure; (Engine Oil) | 1 |
| 6V***49 | Seal-O-Ring (Id=11.89mm); (11.89-mm Id) | 3 |
156-9792 Wiring Gp-Electronic Control
| 11***63 | Harness As-Engine; -Electronic Control | 1 |
| 15***92 | Wiring Group-Electronic Control | 1 |
| 3S***93 | Strap-Cable-To Tie Harnesses Together | 1 |
117-2759 Wiring Gp-Electronic Control
| 11***59 | Wiring Group-Electronic Control; (Electronic Control) | 1 |
| 11***63 | Harness As-Engine; -Electronic Control | 1 |
| 3S***93 | Strap-Cable-To Tie Harnesses Together | 1 |
117-2760 Wiring Gp-Unit Injector
| 11***60 | Wiring Group-Unit Injector | 1 |
| 2V***16 | Clip; (9.52mm Id) | 4 |
| 4P***37 | Harness Assembly-Wiring; (Unit Injector) | 1 |
Engine Arrangement
148-1330 Engine Ar-Complete
| 10***36 | Starting Motor Group-Electric | 1 |
| 11***85 | Cover Group-Cylinder Block | 1 |
| 11***90 | Cooler Group-Engine Oil; (Engine Oil) | 1 |
148-0770 Engine Ar-Core
| 11***82 | Cylinder Block Group | 1 |
| 11***06 | Housing Group-Front; (Front) | 1 |
| 11***82 | Camshaft Group | 1 |
Fuel System
116-5436 Filter Gp-Fuel
| 11***36 | Filter Group-Fuel; -Secondary | 1 |
| 1R***62 | Filter As-Fuel; (Advanced Efficiency)(Secondary) | 1 |
116-5434 Fitting Gp-Fuel Lines
| 11***34 | Fitting Group-Fuel Lines | 1 |
| 11***35 | Connector | 1 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 1 |
159-0645 Fitting Gp-Fuel Return
| 15***45 | Fitting Group-Fuel Return | 1 |
| 2R***06 | Connector Valve Assembly To; Connector- Tube Assembly To Logic Valve | 1 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 1 |
117-0183 Fitting Gp-Fuel Supply
| 11***83 | Fitting Group-Fuel Supply; (Supply)(Supply) | 1 |
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 1 |
| 9X***50 | Connector-O-Ring; (O-Ring Port) | 1 |
148-0791 Lines Gp-Fuel Injection
| 11***18 | Hose As | 1 |
| 12***79 | Manifold; (Fuel) | 1 |
| 13***88 | Clip-Loop | 2 |
197-5965 Lines Gp-Fuel Injection
| 03***47 | Elbow-Filtered Fuel From Based Assembly | 1 |
| 03***62 | Elbow, Swivel Nut 45 Degrees (-6) | 1 |
| 11***04 | Hose As. | 1 |
123-0782 Plug Gp-Fuel Lines
| 12***82 | Plug Group-Fuel Lines | 1 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 1 |
| 9S***04 | Plug-O-Ring; (Straight Thread O-Ring) | 1 |
116-5428 Pump & Mtg Gp-Fuel Transfer
| 09***70 | Washer-Sealing | 2 |
| 11***28 | Pump & Mtg Group-Fuel Transfer; (Fuel Transfer) | 1 |
| 19***43 | Pump Group-Fuel Transfer | 1 |
116-5415 Pump Gp-Fuel Injection
| 11***15 | Pump Group-Fuel Injection | 1 |
| 11***84 | Seal-O-Ring; (32.99mm Id) | 1 |
| 15***01 | Bolt; (8x1.25x7-mm)(M8x1.25x70mm) | 1 |
116-5411 Pump Gp-Fuel Priming
| 11***11 | Pump Group-Fuel Priming; -Hand | 1 |
| 13***41 | Pump Group-Fuel Priming; (Hand) | 1 |
| 1P***36 | Gasket; (Fuel Priming Pump)(Fuel Priming Pump) | 1 |
Lubrication System
166-1329 Base Gp-Oil Filter
| 11***45 | Valve-Pump Bypass; (Engine Oil Filter) | 1 |
| 16***28 | Base Assem. | 1 |
| 16***29 | Base Group-Oil Filter; -Engine | 1 |
122-0725 Base Gp-Oil Filter
| 11***45 | Valve-Pump Bypass; (Engine Oil Filter) | 1 |
| 12***25 | Base Group-Oil Filter; -Engine | 1 |
| 12***26 | Base As; (Oil Filter) | 1 |
117-2786 Cover Gp-Oil Filter Base
| 11***86 | Cover Group-Oil Filter Base; -Engine | 1 |
| 5S***34 | Seal-O-Ring; (97.79mm Id) | 1 |
| 7C***42 | Cover; (Filter Base) | 1 |
156-6352 Filler Gp-Engine Oil
| 06***55 | Seal-O-Ring (Id=47.22mm) | 3 |
| 13***29 | Tube As; (Oil Filler) | 1 |
| 15***52 | Filler Group-Engine Oil | 1 |
117-2751 Filter Gp-Engine Oil
| 11***51 | Filter Group-Engine Oil | 1 |
| 13***45 | Bolt-Hex Head; (M10x1.50x30) | 6 |
| 16***29 | Base Group-Oil Filter; -Engine | 1 |
161-6303 Gauge Gp-Oil Level (Dipstick)
| 03***28 | Clip; (31.8mm Id) | 1 |
| 13***30 | Gauge As-Oil Level; (Dipstick)(Engine) | 1 |
| 13***31 | Tube As-Gauge Guide | 1 |
129-2855 Lines Gp-Turbocharger Oil
| 11***87 | Seal-O-Ring (23.16 mm Id) | 1 |
| 11***42 | Adapter | 1 |
| 12***55 | Lines Group-Turbocharger Oil | 1 |
9y-8073 Pump Gp-Engine Oil
| 6D***46 | Seal-O-Ring (Id=101.27mm) | 1 |
| 6V***17 | Bolt; (M8x1.25x30-mm)(Location Z) | 4 |
| 9M***74 | Washer-Hard; (8.8x16x2-mm Thk)(Hard) | 4 |
117-2746 Pump Gp-Engine Oil
| 06***61 | Seal-O-Ring (Id=40.87mm) | 1 |
| 11***03 | Tube Assem. | 1 |
| 11***46 | Pump Group-Engine Oil | 1 |
Steering System
156-5783 Valve Gp-Check
| 03***33 | Seal-O-Ring; (12.42mm Id) | 1 |
| 15***83 | Valve Group-Check; -Fuel | 1 |
| 6V***23 | Ring; (Backup) (13.16mm Id) | 1 |
485 serial number reference
The 485's PIN/serial plate is riveted to the main frame. On Lexion-based combines this typically sits low on the frame near the front axle/undercarriage, often on the same side as the cab access ladder, though exact placement can shift by production run - check the identification-plate section of the operator's manual if it isn't visible right away. Read the first three characters (or, on later Claas-numbered 485 R units, the leading digits) as the prefix identifying model and build series; the remaining digits are the sequential unit number. Manuals cite the serial break as prefix-plus-starting-number-and-up (e.g. 8ZW1-Up).
| Prefix | Identifies | Notes |
|---|---|---|
| 8ZW | Lexion 485 (Cat-badged combine, Cat/Claas joint-venture production, APS-threshing configuration) | Model-specific PIN prefix for the 485 per Cat's own Lexion 485 parts manual (serial break 8ZW1-Up) and the combined 470/480/485 operation and maintenance manual. Engine is the Cat 3176C ATAAC diesel; Cat's own product data lists 365 hp (272 kW) gross, though some resale listings for individual units round this to 350 hp. Built at the Cat-Claas joint-venture combine plant in Omaha, Nebraska. Documented on 1999-2001 model-year units under Cat branding; distinct from the later 485 R rotary variant, which uses a different engine and a different serial system. |
| 7ZR | Early/shared-run Lexion 480 and 485 (pre-split production) | Cat's own Lexion 480 and Lexion 485 parts manuals both list this prefix (serial break 7ZR1170-Up) ahead of the model-specific 2BZ (480) and 8ZW (485) breaks, confirming a shared early build run across the two platforms before separate model-specific codes took over. Caution: general Cat serial-prefix references also assign 7ZR to an unrelated D7R Series II dozer (3176-engined, different era and product line entirely). This prefix is reused across two unrelated machines, so confirm the unit is actually a combine (not a dozer) and that it falls in the 7ZR1170-Up combine range before relying on it. |
| 56800011-56899999 | Lexion 485 R (rotary-separator variant, Mobil-Trac/RWA-capable) | Not a Cat three-character PIN; this is Claas's straight numeric serial-catalog range used in parts-catalog listings for the 485 R. The 485 R is a distinct build from the 8ZW-prefixed 485: listings for actual 485 R units show a Cat C-12 diesel rated around 400 hp (298 kW) as installed in the combine, versus the 3176C used in the 8ZW-prefixed 485 — the C-12's higher industrial/truck ratings do not apply to this combine's own installed rating. Confirm with dealer, since this range comes from parts-catalog listings rather than a Cat-format PIN chart. |
Frequently asked questions
What engine does the Caterpillar 485 combine use?
It depends on the production run. Earlier 485s carry a Caterpillar 3176 or 3176C ATAAC turbocharged, air-to-air aftercooled inline-six, 10.3 L, rated 261-272 kW (350-365 hp) gross. The later 485R update carries a Caterpillar C-12 inline-six, 12.0 L, installed in the combine at roughly 298 kW (400 hp); industrial/truck C-12 literature shows a higher ceiling near 320-330 kW (430-445 hp), but that figure does not apply to this combine's own rating. Confirm which engine a specific unit has from its model/serial plate before ordering parts.
What is the operating weight of the Caterpillar 485 combine?
Factory literature for the 480R/485R pair lists a transport weight of roughly 15,300 kg (33,730 lb) in base configuration, rising to about 18,300 kg (40,340 lb) fully equipped. Actual weight varies with header, tank load, tracks/tires and options — check the machine's data plate or a serial-specific spec sheet for an exact figure on a given unit.
What replaced the Caterpillar 485 combine?
Caterpillar sold its stake in the Claas joint venture in 2002, ending new Cat-owned combine production. The 485/485R's flagship rotary-combine role was taken over by the Lexion 500 series (roughly 2003-2008), still finished in Cat-yellow under license before Claas moved the line fully to its own Lexion branding around 2010.
What 485 owners discuss
What engine does the Cat 485 use, and is it the same as the 485R?
How does the Mobil-trac undercarriage hold up in the field?
The engine cooling fan speeds up and disengages repeatedly at idle - what's going on?
What electrical problems come up most on the 400-series Cat/Lexion combines?
What wear items show up most on the grain-handling and driveline side?
Any engine-specific quirks worth knowing?
What should I check before buying a used 485 or 485R?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific 485 part?
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