Caterpillar 225D
Caterpillarexcavator

Caterpillar 225D

Maintenance schedule, common problems & OEM parts breakdown

The Caterpillar 225D is a mid-size crawler excavator designed for heavy-duty excavation, trenching, and material handling. Depending on the specific configuration, this series features either a 3304 engine providing 150 hp (112 kW) or a 3208 engine delivering 165 hp (123 kW). The machine operates in a weight class ranging from approximately 55,998 lb (25,400 kg) for standard units to 58,863.5 lb (26,700 kg) for LC variants. Available with multiple boom and stick configurations, the series offers varying digging depths up to 23 ft (7 m) and cutting heights up to 28.02 ft (8.5 m).

Across its production generations, the 225D evolved through different engine displacements and weight distributions to meet changing jobsite demands. The transition between standard and LC configurations allows for specialized stability and reach capabilities. In today's used equipment market, the 225D remains a significant asset due to its robust hydraulic performance and the availability of Caterpillar 3304 and 3208 engine components. Its durability in earthmoving and forestry applications makes it a high-value target for fleet owners seeking reliable mid-range production.

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 225D specifications

Engine

Model3304 (Standard); 3208 (LC variant)
Gross Power150 hp (Standard); 165 hp (LC variant)
Net Power150 hp (112 kW) (Standard); 165 hp (123 kW) (LC variant)
Displacement427.2 cu in (Standard); 634.7–635 cu in (10,401 cc) (LC variant)

Weights

Operating Weight55,997.5–55,998 lbs (25,400 kg) (Standard); 58,863.5–58,864 lbs (26,700 kg) (LC variant)
Ground Pressure8.81–9.9 psi

Dimensions

Width to Outside of Tracks9.81 ft (3 m) (Standard); 10 ft (3 m) (LC variant)
Height to Top of Cab10.44 ft (3 m) (Standard); 9.8 ft (3 m) (LC variant)
Tail Swing Radius9.55 ft (3 m) (Standard); 10 ft (3 m) (LC variant)
Ground Clearance0 ft (0 m)
Track Gauge6.56 ft (2 m)
Track Shoe Width21.66 in (55 cm) (Standard); 22 in (55 cm) (LC variant)
Removal Counterweight Clearance3.42 ft (1 m) (Standard); 3.3 ft (1 m) (LC variant)

Performance

Max Digging DepthVaries by configuration: 19.53 ft (6 m) to 23 ft (7 m)
Max Cutting HeightVaries by configuration: 27.5 ft (8 m) to 26.2 ft (8 m)
Max Loading HeightVaries by configuration: 19.07 ft (6 m) to 19.79 ft (6 m)
Max Reach Along GroundVaries by configuration: 30.29 ft (9 m) to 33.24 ft (10 m)
Max Vertical Wall Digging DepthVaries by configuration: 9.8 ft (3 m) to 13 ft (4 m)
Max Travel Speed2.5 mph (4 kph)
Drawbar Pull39,791.19–40,016 lb (18,049–18,151 kg)
Hydraulic Pump Flow Capacity109.9–110 gpm (416 lpm)
Hydraulic System Relief Valve Pressure4600 psi

Service capacities (summary)

Fuel Capacity105.7–106 gal (400 l)

Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.

225D fluids & capacities

SystemCapacityRecommended fluid
Engine crankcase (with filter)Not specifiedCAT DEO SAE 15W-40; use SAE 10W-30 for temperatures below 15°F ( -9°C); use CAT DEO-ULS 0W-40 for cold weather applications
Cooling systemNot specifiedCAT ELC or compatible long-life coolant
Fuel tank399.8 L (105.7 gal) to 401.4 L (106 gal), varies by configuration/seriesNot specified
Hydraulic system total AND hydraulic tankNot specifiedCat HYDO Advanced Oils; SAE 10W oil meeting Caterpillar TO-4 specification
Grease (spec only)Not specifiedCAT Multipurpose Grease; CAT Advanced 3Moly Grease; CAT Ultra 5Moly Grease; CAT Desert Gold Grease for hot-weather; CAT Arctic Platinum Grease for cold-weather

Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.

Caterpillar 225D maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level and condition
  • Inspect hydraulic fluid level via sight glass
  • Verify coolant level and cap integrity
  • Drain water from fuel/water separator
  • Check air filter restriction indicator
  • Inspect all hydraulic hoses for cracks or leaks
  • Check track tension and shoe condition
  • Grease boom, stick, bucket, and swing points
Every 250 h
  • Change engine oil and filter
  • Drain fuel filter/water separator
  • Perform visual inspection of all components
  • Check belt and hose condition
  • Inspect air filter primary element
Every 500 h
  • Replace fuel filter
  • Replace hydraulic return filter
  • Perform battery service and terminal inspection
  • Conduct detailed undercarriage inspection
  • Test coolant additive/SCA levels
Every 1,000 h
  • Perform hydraulic oil sample analysis (S.O.S)
  • Service final drive oil
  • Inspect turbocharger for wear
  • Check ROPS bolt torque
  • Measure undercarriage component wear
Every 2,000 h
  • Change hydraulic system oil
  • Perform coolant flush and replacement
  • Service transmission/swing drive oil
  • Conduct comprehensive structural inspection of boom and stick welds
  • Evaluate major machine components

Servicing the 225D beyond the schedule

Predictive Maintenance & Fluid Analysis

Utilize Caterpillar S.O.S fluid analysis to monitor engine oil, hydraulic fluid, and coolant integrity. Regular sampling during PM3 and PM4 intervals detects wear metals like iron or copper and identifies contaminants such as silicon from dust ingestion. Monitoring particle counts in hydraulic oil prevents catastrophic pump and valve failure. Analyzing coolant for pH levels and SCA concentration protects against internal liner pitting and overheating.

Corrective & Common Repairs

Address hydraulic failures by replacing contaminated return filters and inspecting hoses for abrasion or leaks. Monitor the fuel/water separator closely to prevent injector damage from water contamination. If engine performance drops, inspect the air filter primary element and turbocharger for signs of distress. Ensure all pins and bushings are adequately greased to prevent excessive play in the boom, stick, and bucket attachments.

Overhaul & Rebuild Points

Plan major component evaluations during 2,000-hour service intervals. Critical rebuild points include hydraulic system oil changes, final drive oil service, and comprehensive structural inspections of boom and stick welds. Monitor undercarriage wear measurements to prevent expensive sprocket or track chain replacements. For high-hour machines, evaluate the condition of the engine turbocharger and transmission/swing drive components for potential overhaul requirements.

Seasonal & Environment Servicing

In dusty or quarry environments, shorten air filter inspection intervals to daily checks and replace elements more frequently. Clean radiator and oil cooler fins daily to prevent overheating. For machines operating in extreme temperatures, verify coolant additive levels and inspect battery condition. Ensure all grease points are serviced regularly to protect moving parts from moisture-induced corrosion and abrasive grit ingress.

225D common service parts

Part numberPart
6V-7615Film-Identification-On Fuel FilterCheck fitment →
6V-7614Film-IdentificationCheck fitment →

Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.

225D fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
110-0Engine Coolant Temperature — Above NormalLow coolant level, thermostat failureInspect cooling system, refill coolant, test thermostat
110-3Engine Coolant Temp Sensor — Voltage HighOpen circuit or sensor failureCheck wiring; replace sensor if confirmed faulty
174-3Engine Fuel Temperature — Voltage Above NormalOpen circuit in sensor wiringInspect harness and replace sensor if necessary
190-8Engine Speed — Abnormal FrequencySpeed sensor air gap, sensor failure, or tone ring damageCheck sensor gap; test speed sensor and tone ring
41-38-Volt DC Supply — Voltage Above NormalShort to power on 8V reference circuitInspect sensors sharing the 8V supply and isolate fault
41-48-Volt DC Supply — Voltage Below NormalShort to ground on 8V reference circuitDisconnect sensors one at a time to locate short
2348-9SAE J1939 Data Link #2 — Abnormal Update RateCAN bus wiring damage or termination faultCheck CAN wiring and measure termination resistance

Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.

225D attachments & work tools

Buckets

Available in digging, ditching, and rock configurations. Bucket width is documented at 0.61 m (2 ft) for specific models.

Hydraulic hammers

Compatible with hydraulic hammer attachments. Use Hammer Paste Grease specifically for hydraulic impact hammer applications.

Quick couplers

Coupler attachments are available for the 225D LC configuration.

Thumbs/grapples

Thumb attachments are available for the 225D LC model to enhance versatility.

Rippers

Ripper attachments are available for use on the 225D LC excavator.

Hydraulic-kit notes

System features high-pressure hydraulic tubes and increased hydraulic pressure. Relief valve pressure is rated at 4600 psi.

All 225D assemblies by section

Every catalogued assembly group for the Caterpillar 225D. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Air Inlet And Exhaust System
3n2915 Adapter Gp-Air Cleaner
3N***15Adapter Group-Air Cleaner; Air Cleaner Adapter Group1
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7e5705 Air Cleaner Gp
7w2878 Cartridge Gp-Turbocharger*R
7e5673 Extension Gp-Exhaust
6i3830 Kit-Adapter
10***50Film; (Air Cleaner) (Radial Seal) (On Air Cleaner Cover)1
6I***30Kit-Air Cleaner1
9S***74Gasket (Outer)1
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7e5704 Lines Gp-Air
9n6755 Lines Gp-Air
9N***55Lines Group-Air; Air Lines Group1
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4e6216 Lines Gp-Air
7n8464 Lines Gp-Pcv
7N***64Lines Group-Pcv; Positive Crankcase Ventilation Lines Gp.1
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9n3612 Manifold Gp-Exhaust
9N***12Manifold Group-Exhaust; Exhaust Manifold Group1
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9n6619 Manifold Gp-Inlet
9N***19Manifold Group-Inlet; Inlet Manifold Group1
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7e4797 Muffler Gp
5l7942 Precleaner Gp-Air
4h5076 Precleaner Gp
9s0601 Prescreener As
5m2734 Prescreener Gp
2w2589 Turbocharger Gp
7w2874 Turbocharger Gp*R
Basic Engine
7e6160 Belt Tightener Gp
9n6609 Camshaft Gp-Single
9l6065 Cover Gp-Cylinder Block
9L***65Cover Group-Cylinder Block; Cylinder Block Cover Group1
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9n0560 Cover Gp-Front Housing
9N***60Cover Group-Front Housing; Front Housing Cover Group1
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9n0730 Cover Gp-Valve Mechanism
9N***30Cover Group-Valve Mechanism; Valve Mechanism Cover Group1
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4w6972 Cover Gp-Valve Mechanism
4w6968 Cover Gp-Valve Mechanism
Crankshaft Bearing Replacements
8N***71.51 mm--Front Main--Non-Grooved1
8N***72.51 mm--Front Main--Non-Grooved1
8N***730 Standard--Front Main--Non-Grooved; 0 (Standard)-Front Main-Non-Grooved1
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9n6222 Crankshaft Gp
2w0085 Crankshaft Gp*R
7e0036 Cylinder Block As
2w8035 Cylinder Block Gp*R
2w8033 Cylinder Block Gp*R
2W***33Cylinder Block Group; Cylinder Block Group1
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7c3807 Cylinder Head As
7c2296 Cylinder Head As
1w2282 Cylinder Head Gp*R
9n3600 Cylinder Head Gp*R
9N***00Cylinder Head Group; Cylinder Head Group1
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9n5590 Damper & Pulley Gp
9N***90Damper & Pulley Group; Pulley And Damper Group1
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7e5800 Drive Gp-Fan
4n8850 Flywheel Gp
7c6032 Housing Gp-Flywheel
7w5447 Housing Gp-Front
7W***47Housing Group-Front; Front Housing Group1
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7e4113 Lifting Gp-Engine
4n8853 Pan Gp-Oil
9n6435 Piston & Rod Gp-8 Required
2w4841 Piston Gp
7e5808 Pulley Gp
7e6185 Pulley Gp-Fan
9n0542 Seal Gp-Crankshaft
9N***42Seal Group-Crankshaft; Crankshaft Seal Group1
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7e9277 Support Gp-Engine
9n5224 Support Gp-Engine
7c6353 Valve As-Pvc
9n6617 Valve Mechanism Gp
9N***17Valve Mechanism Group; Valve Mechanism Group1
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Boom, Sticks, Linkage And Buckets
8r6519 Boom Ar-Hoe
3B***89Fitting-Grease; (Fan And Alternator Drive)3
3V***63Lines Group-Boom; Boom Lines Group1
8R***02Lines Group-Boom Cylinder1
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8r6568 Boom Gp
8r6332 Bucket & Bearing As
8r6333 Bucket & Bearing As
8r6331 Bucket & Bearing As
8r6330 Bucket & Bearing As
8r6327 Bucket & Bearing As
8r6334 Bucket & Bearing As
8r6329 Bucket & Bearing As
8r6336 Bucket & Bearing As
8r6328 Bucket & Bearing As
4e2585 Bucket As-Versa Link
9c5570 Bucket As-Versa-Link
9c5562 Bucket As-Versa-Link
9c5547 Bucket As-Versa-Link
9c5566 Bucket As-Versa-Link
9c5558 Bucket As-Versa-Link
9c5554 Bucket As-Versa-Link
9c5184 Bucket As-Versa-Link
8r2060 Bucket As-Versa-Link
8r2066 Bucket As-Versa-Link
8r6447 Linkage Ar-Hoe Bucket
3B***89Fitting-Grease; (Fan And Alternator Drive)2
8R***47Linkage Ar-Hoe Bucket1
8R***18Linkage Group-Bucket1
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8r9290 Linkage Gp-Bucket
8r6415 Linkage Gp-Bucket
8r6518 Linkage Gp-Bucket
4e9097 Ripper As-3 Shank
9c7517 Ripper Gp-Versa-Link
8r6911 Stick Ar-Hoe
2V***58Lines Group-Stick; Hoe Stick Lines Group1
8R***11Stick Ar-Hoe1
8R***12Stick Group-Hoe1
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8r6917 Stick Ar-Hoe
2V***60Lines Group-Stick; Stick Lines Group1
8R***17Stick Ar-Hoe1
8R***18Stick Group-Hoe1
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8r6914 Stick Ar-Hoe
2V***59Lines Group-Stick; Stick Lines Group1
8R***14Stick Ar-Hoe1
8R***15Stick Group-Hoe1
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8r6912 Stick Gp-Hoe
8r6918 Stick Gp-Hoe
8r6915 Stick Gp-Hoe
3g3236 Tip Gp-Penetration
3g3351 Tip Gp-Penetration
9w6473 Tip Gp-Sharp-Corner
9w6472 Tip Gp-Sharp-Center
9w6474 Tip Gp-Sharp-Center
9w6475 Tip Gp-Sharp-Corner
8j9172 Tip Gp-Long
8j4954 Tip Gp-Short
8j9171 Tip Gp-Short
8j4953 Tip Gp-Wide
Cab, Gauges And Accessories
5v5388 Air Conditioner & Mounting Gp
5V***88Air Conditioner & Mounting Group1
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8r8129 Air Conditioner Ar
8R***29Air Conditioner Ar1
8R***30Air Conditioner Ar1
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8r8130 Air Conditioner Ar
5V***88Air Conditioner & Mounting Group1
7E***05Compressor Group-Refrigerant1
7V***55Lines Group-Air Conditioner1
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7g3477 Air Conditioner Gp-Part 1 Of 2
7g3477 Air Conditioner Gp-Part 2 Of 2
9p3788 Blower As
9u2061 Cab Gp-Part 3 Of 3
6w3441 Cab Gp-Part 1 Of 3
9u2061 Cab Gp-Part 2 Of 3
9v7540 Cab Gp
9u2061 Cab Gp-Part 1 Of 3
9u2062 Cab Gp-Part 2 Of 2
5v2105 Cab Gp
9u2062 Cab Gp-Part 1 Of 2
6w3441 Cab Gp-Part 3 Of 3
6w3441 Cab Gp-Part 2 Of 3
7n4296 Compressor Gp*R
7N***96Compressor Group-Clutch & Refrig1
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7e5805 Compressor Gp-Refrigerant
8r8123 Mounting & Condenser Gp
8R***23Condenser & Mounting Group; Mounting & Condenser Gp1
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7g3478 Condenser Gp-Part 2 Of 2
7g3478 Condenser Gp-Part 1 Of 2
9w0068 Control Gp-Electronic
9v8882 Cover Gp-Console
6w2520 Cushion As-Arm-Lh
6w2519 Cushion As-Arm-Rh
9c8725 Fan Gp-Circulating
3v1648 Fan Gp-Defroster
5d2856 Fan Gp-Defroster
6w7160 Gauge & Warning Gp-Part 1 Of 3
6w7160 Warning & Gauge Gp-Part 1 Of 3
6w7160 Warning & Gauge Gp-Part 2 Of 3
6w7160 Gauge & Warning Gp-Part 3 Of 3
6w7160 Gauge & Warning Gp
6w7160 Warning & Gauge Gp-Part 3 Of 3
6w7160 Gauge & Warning Gp-Part 2 Of 3
2v8280 Guard Gp-Window
9w2900 Heater Gp
3v1621 Heater Gp-Cab
3v4490 Heater Gp-Cab
3v4495 Horn Gp-Electric
7v9855 Lines Gp-Air Conditioner-Part 2 Of 2
7v9855 Lines Gp-Air Conditioner-Part 1 Of 2
8r6611 Mirror Gp
5v6143 Mirror Gp-Rear View
8y6885 Seal Gp-Window
8y6811 Seat Belt Gp
9c7774 Seat Gp
9c4769 Seat Gp
8y6803 Seat Gp
6w1965 Seat Gp
9v8885 Seat Gp-Adjustable-Part 1 Of 2
9v8885 Seat Gp-Adjustable-Part 2 Of 2
8r3229 Seat Gp-Adjustable-Optional Tilt-Part 2 Of 2
9v8880 Seat Gp-Adjustable-Part 1 Of 2
8r3229 Seat Gp-Adjustable-Optional Tilt-Part 1 Of 2
9v8880 Seat Gp-Adjustable-Part 2 Of 2
9v8890 Seat Gp-Adjustable-Optional Tilt-Part 1 Of 2
9v8890 Seat Gp-Adjustable-Optional Tilt-Part 2 Of 2
9c3697 Seat Gp-Suspension
9c7161 Suspension Gp-Seat-Part 2 Of 2
9c7161 Suspension Gp-Seat-Part 1 Of 2
6w9972 Washer Gp-Windshield
5c8691 Washer Gp-Windshield
9c6914 Window Gp
3V***37Window Group1
9C***14Window Group1
9C***33Window Group1
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8v9202 Window Gp
8y6836 Window Gp
9c6933 Window Gp
3v5137 Window Gp
8v9203 Windshield Gp-Part 2 Of 2
8v9203 Windshield Gp-Part 1 Of 2
9v2534 Wiper Gp
9v2533 Wiper Gp
7v9856 Wiring Gp-Air Conditioner
Chassis And Undercarriage
3v5277 Carbody Gp
6w9875 Counterweight Gp
8v9107 Door Gp-Hood Side
9c3988 Frame Ar-Undercarriage
3V***63Gear & Bearing Group1
3V***76Guard Group-Recoil Mechanism1
3V***77Carbody Group1
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9c3141 Frame Gp-Track Roller
9c3131 Frame Gp-Track Roller
8r5997 Frame Gp-Upper
3v1463 Gear & Bearing Gp
8k4127 Gear & Bearing Gp
8K***85Seal-Bottom2
8K***26Bearing & Gear Group-Flag Bearings, Inc.1
8K***27Gear & Bearing Group1
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2v0357 Guard Gp-Bottom
2V***57Guard Group-Bottom; Bottom Guard Group1
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9c3398 Guard Gp-Bottom
0S***85Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine8
2V***32Panel As1
2V***33Panel As1
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6c3425 Guard Gp-Lines
6C***25Guard Group-Lines; Guard Gp-Pilot Lines1
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3v5276 Guard Gp-Recoil Mechanism
6w6647 Guard Gp-Swivel
8k4123 Guard Gp-Swivel
3v5270 Guard Gp-Track Guide
6w2488 Guard Gp-Track Guide
3v5269 Guard Gp-Track Guide
3V***69Guard Group-Track Guide; Track Guide Guard Group1
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3v5264 Guard Gp-Track Guide
8k0173 Guard Gp-Track Motor
8k4683 Guard Gp-Track Motor
8K***83Guard Group-Track Motor; Track Motor Guard Group1
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8r6411 Hood & Guard Gp-Part 1 Of 2
8r6411 Hood & Guard Gp-Part 2 Of 2
3v5266 Idler Gp-Front-Part 2 Of 2
3V***66Idler Group-Front; Front Idler Group1
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3v5266 Idler Gp-Front-Part 1 Of 2
3V***66Idler Group-Front; Front Idler Group1
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3v5278 Idler Gp-Front-Part 2 Of 2
3V***78Idler Group-Front; Front Idler Group1
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3v5278 Idler Gp-Front-Part 1 Of 2
3V***78Idler Group-Front; Front Idler Group1
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9w6775 Link As-Track
6y8183 Link As-Track
6y8184 Link As-Track
5v2101 Platform Gp
5a8374 Roller Gp-Track Carrier
5A***74Roller Group-Track Carrier; Track Carrier Roller Group1
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8e4573 Track Roller Gp-Single Flange
8E***73Roller Group-Track-Single Flange; Track Roller Gp-Single Flange1
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8e4612 Track Roller Gp-Single Flange
5P***48Washer--Bracket To L.H. Support Rail4
7F***27Bolt Hydraulic Filler And Mounting4
8E***73Roller Group-Track-Single Flange; Track Roller Gp-Single Flange1
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4e3966 Service Gp-Frame
8v9153 Step Gp
4e2281 Step Gp
4e0185 Support Gp-Rear
9w6773 Track Gp
1S***59Bolt 2.15 In. (54.61 mm) Long172
1S***60Nut-Track; (3/4-16-Thd)172
6Y***83Link As-Track1
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9w6134 Track Gp
1S***59Bolt 2.15 In. (54.61 mm) Long196
1S***60Nut-Track; (3/4-16-Thd)196
6Y***84Link As-Track1
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9w6158 Track Gp
1S***59Bolt 2.15 In. (54.61 mm) Long196
1S***60Nut-Track; (3/4-16-Thd)196
6Y***84Link As-Track1
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9w6772 Track Gp-2 Required
1S***59Bolt 2.15 In. (54.61 mm) Long172
1S***60Nut-Track; (3/4-16-Thd)172
6Y***83Link As-Track1
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9w6721 Track Roller Gp-Single Flange
9W***21Track Roller Group-Single Flange1
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6w9871 Walkway Gp
Cooling System
1w2230 Cooler Gp-Engine Oil
7w1764 Oil Cooler & Filter Base Gp
9n0521 Cooler Gp-Engine Oil
9n5659 Cooler Gp-Engine Oil
7e5794 Cooler Gp-Hydraulic Oil
7e5796 Fan Gp-Suction
7w4464 Lines Gp-Water
9n3654 Pump Gp-Water
9N***54Pump Group-Water; Water Pump Group1
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7e5559 Radiator Gp
Engine Arrangement
7e0777 Engine Ar-Part 1 Of 2
1W***38Filter Group-Engine Oil1
2W***33Cylinder Block Group; Cylinder Block Group1
3N***15Adapter Group-Air Cleaner; Air Cleaner Adapter Group1
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7e0777 Engine Ar-Part 2 Of 2
1W***06Pump Group-Engine Oil1
2W***89Turbocharger Group1
4N***14Pump Group-Fuel Priming; Fuel Priming Pump Group1
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Fuel System And Governor
4e4706 Control Ar-Governor
2V***73Diode Assem.1
4E***04Control Group-Governor1
4E***06Control Ar-Governor1
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8r1235 Control Ar-Governor
2V***73Diode Assem.1
8R***48Control Group-Governor1
8R***26Harness As1
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8r1234 Control Ar-Governor
1V***33Diode Assem.1
8R***48Control Group-Governor1
8R***27Harness As.1
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4e4705 Control Ar-Governor
1V***33Diode Assem.1
4E***04Control Group-Governor1
4E***05Control Ar-Governor1
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7x1902 Control Gp-Electronic
4n9399 Control Gp-Governor
4N***99Control Group-Governor; Governor Control Group1
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9c1720 Control Gp-Governor
9l6743 Control Gp-Governor
9L***43Control Group-Governor; Governor And Control Group1
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4e4704 Control Gp-Governor-Part 1 Of 3
4e4704 Control Gp-Governor-Part 3 Of 3
8r0448 Control Gp-Governor-Part 2 Of 3
4e4704 Control Gp-Governor-Part 2 Of 3
8r0448 Control Gp-Governor-Part 1 Of 3
8r0448 Control Gp-Governor-Part 3 Of 3
7c7670 Drive Gp-Governor
9l6925 Fastener Gp-Fuel Pump Housing
9L***25Fastener Group-Fuel Pump Housing; Fuel System Fastener Group1
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4n5868 Filter Gp-Fuel
4N***68Filter Group-Fuel; Fuel Filter Group1
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8r5992 Lines Gp-Fuel
4e4471 Lines Gp-Fuel
7e4114 Lines Gp-Fuel Filter
9y0301 Lines Gp-Fuel Injection
9y0300 Lines Gp-Fuel Injection
7w1998 Lines Gp-Fuel Injection
7W***98Lines Group-Fuel Injection; Fuel Injection Lines Group1
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4n4314 Pump Gp-Fuel Priming
4N***14Pump Group-Fuel Priming; Fuel Priming Pump Group1
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7c8928 Governor & Fuel Injection Pump Gp-Part 2 Of 5
7c8928 Governor & Fuel Injection Pump Gp-Part 4 Of 5
7c9507 Governor & Fuel Injection Pump Gp
7c8928 Governor & Fuel Injection Pump Gp-Part 1 Of 5
7c8973 Governor & Fuel Injection Pump Gp
7c8928 Governor & Fuel Injection Pump Gp-Part 3 Of 5
7c8928 Governor & Fuel Injection Pump Gp-Part 5 Of 5
7c8972 Governor & Fuel Injection Pump Gp*R
7c9506 Governor & Fuel Injection Pump Gp
7C***06Pump Group-Gov & Fuel Inj; Pump Gp-Governor & Fuel Injection1
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4e3257 Tank Gp-Fuel
3v1657 Tank Gp-Fuel
6n0509 Torque Control Gp
Hydraulic System
1u4723 Valve Gp-Check
6e2562 Valve Gp-Check-Pilot Operated
9t2348 Valve Gp-Check
9t1725 Valve Gp-Check
6e0829 Actuator Gp
9t1749 Actuator Gp
6e0830 Actuator Gp
9c0993 Air Compressor Gp
8r8324 Air Compressor Gp
9j3954 Bypass Gp-Filter
9J***54Bypass Group-Filter; -Hydraulic Oil1
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7v5908 Control & Lines Ar
3V***62Control Group-Electric; Electric Hand Control Group1
3V***20Lines Group-Rotator1
6V***15Film Instruction Clamshell/Boom1
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8r7047 Control Ar-Grapple
4D***67Block; 184mm(7.25in)Lg1
4V***12Boss; (3/8-16-Thd)4
4V***21Control Group-Grapple1
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4v9221 Control Gp-Grapple-Part 4 Of 5
4v9221 Control Gp-Grapple-Part 3 Of 5
4v9221 Control Gp-Grapple-Part 2 Of 5
4v9221 Control Gp-Grapple-Part 1 Of 5
4v9221 Control Gp-Grapple-Part 5 Of 5
9c9233 Control Gp-Hydraulic
9c9235 Control Gp-Hydraulic
9C***35Control Group-Hydraulic; Control Gp-Hydraulic Hammer1
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9c9234 Control Gp-Hydraulic
9C***34Control Group-Hydraulic; Control Gp-Hydraulic Hammer1
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9c9232 Control Gp-Hydraulic
8v8247 Control Gp-Pilot Operated Hydraulic-Part 2 Of 8
8V***47Control Group-Pilot Operated Hydraulic1
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8v8247 Control Gp-Pilot Operated Hydraulic-Part 7 Of 8
8V***47Control Group-Pilot Operated Hydraulic1
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8v8247 Control Gp-Pilot Operated Hydraulic-Part 8 Of 8
8V***47Control Group-Pilot Operated Hydraulic1
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8v8247 Control Gp-Pilot Operated Hydraulic-Part 4 Of 8
8V***47Control Group-Pilot Operated Hydraulic1
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8v8247 Control Gp-Pilot Operated Hydraulic-Part 1 Of 8
8V***47Control Group-Pilot Operated Hydraulic1
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8v8247 Control Gp-Pilot Operated Hydraulic-Part 3 Of 8
8V***47Control Group-Pilot Operated Hydraulic1
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8v8247 Control Gp-Pilot Operated Hydraulic-Part 6 Of 8
8V***47Control Group-Pilot Operated Hydraulic1
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8v8247 Control Gp-Pilot Operated Hydraulic-Part 5 Of 8
8V***47Control Group-Pilot Operated Hydraulic1
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8r6520 Control Gp-Pressure
8r6601 Control Gp-Pressure
8R***01Control Group-Pressure; Control Gp-Increased Pressure1
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6w3988 Coupling Gp-Pump
9t9747 Cylinder Gp-Boom-2 Required (Chgs 01-02s3)
9t9747 Cylinder Gp-Boom-2 Required (Chg 00)
9j7006 Cylinder Gp-Hoe Bucket (Chg 09-11b1)
9J***06Cylinder Group-Bucket; Hoe Bucket Cylinder Group1
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9j7006 Cylinder Gp-Hoe Bucket (Chg 12-13)
9J***06Cylinder Group-Bucket; Hoe Bucket Cylinder Group1
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6w7991 Cylinder Gp-Engine Speed Actuator
4e3922 Cylinder Gp-Engine Speed Actuator
4E***22Cylinder Group-Eng Speed Actuator1
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9t9744 Cylinder Gp-Stick (Chg 00)
9t9744 Cylinder Gp-Stick (Chg 01)
6c0083 Filter Gp
8j7390 Filter Gp
8J***90Filter Group; (Pilot System Oil Filter)1
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9j3952 Filter Gp-External
9J***52Filter Group-External; -Hydraulic1
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9j1212 Filter Gp-Oil
9t3704 Head Gp-Pump
8r0561 Installation Ar-Hammer
6C***77Lines Group-Boom1
6C***93Lines Group-Hydraulic Stick1
8R***61Installation Ar-Hammer1
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8r0560 Installation Ar-Hammer
6C***76Lines Group-Boom1
6C***92Lines Group-Hydraulic Stick1
8R***60Installation Ar-Hammer1
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8r0562 Installation Ar-Hammer
6C***77Lines Group-Boom1
6C***93Lines Group-Hydraulic Stick1
8R***62Installation Ar-Hammer1
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8r0559 Installation Ar- Hammer
6C***76Lines Group-Boom1
6C***92Lines Group-Hydraulic Stick1
8R***59Installation Ar-Hydraulic Hammer1
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8r6827 Lines Ar-Boom Check Valve
8R***27Lines Ar-Boom Check Valve1
8R***29Lines Group-Boom Check Valve1
8V***46Lines Group-Boom; Boom Check Valve Lines Group1
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4e6238 Lines Ar-Check Valve
4E***38Lines Ar-Check Valve1
6W***79Lines Group-Check Valve1
8R***01Control Group-Pressure; Control Gp-Increased Pressure1
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6w6744 Lines Gp-Air Compressor
6c0876 Lines Gp-Boom-Hammer
3v5263 Lines Gp-Boom
3V***63Lines Group-Boom; Boom Lines Group1
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6c0877 Lines Gp-Boom-Hammer
8v6746 Lines Gp-Boom
8V***46Lines Group-Boom; Boom Check Valve Lines Group1
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8r6829 Lines Gp-Boom Check Valve-Base-Part 2 Of 2
8r6829 Lines Gp-Boom Check Valve-Base-Part 1 Of 2
8r6502 Lines Gp-Boom Cylinder
6w8679 Lines Gp-Check Valve-Part 2 Of 2
6w8679 Lines Gp-Check Valve-Part 1 Of 2
7v5942 Lines Gp-Clamshell-Part 1 Of 2
7v5942 Lines Gp-Clamshell-Part 2 Of 2
7v5943 Lines Gp-Clamshell-Part 2 Of 2
7v5941 Lines Gp-Clamshell-Part 2 Of 2
7v5943 Lines Gp-Clamshell-Part 1 Of 2
7v5941 Lines Gp-Clamshell-Part 1 Of 2
8r4925 Lines Gp-Front-Part 2 Of 2
8r4925 Lines Gp-Front-Part 1 Of 2
9c2573 Lines Gp-Grease
6w4628 Lines Gp-Hydraulic Pump-Part 3 Of 3
6w4628 Lines Gp-Hydraulic Pump-Part 1 Of 3
6w4628 Lines Gp-Hydraulic Pump-Part 2 Of 3
6c0892 Lines Gp-Hydraulic Stick
6c0893 Lines Gp-Hydraulic Stick
3v5332 Lines Gp-Pilot-Part 3 Of 3
3v5332 Lines Gp-Pilot-Part 2 Of 3
3v5332 Lines Gp-Pilot-Part 1 Of 3
3v8859 Lines Gp-Return & Filter-Part 2 Of 2
3v8859 Lines Gp-Return & Filter-Part 1 Of 2
3v9120 Lines Gp-Rotator
7v5909 Lines Gp-Rotator
2v8358 Lines Gp-Stick
2V***58Lines Group-Stick; Hoe Stick Lines Group1
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2v8359 Lines Gp-Stick
2V***59Lines Group-Stick; Stick Lines Group1
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2v8360 Lines Gp-Stick
2V***60Lines Group-Stick; Stick Lines Group1
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8r5892 Lines Gp-Swing Motor
6w1988 Lines Gp-Track Motor-Part 3 Of 3
6w1988 Lines Gp-Track Motor-Part 2 Of 3
9c2803 Lines Gp-Track Motor-Part 1 Of 2
6w1988 Lines Gp-Track Motor-Part 1 Of 3
9c2803 Lines Gp-Track Motor-Part 2 Of 2
9t9604 Motor Gp-Piston
9t0999 Motor Gp-Piston Link-2 Required
9c1988 Pump & Mounting Gp
6w6597 Pump & Mounting Gp
9j7904 Pump Gp-Auxiliary Gear
6w6000 Pump Gp-Auxiliary Lines
9t3712 Pump Gp-Double Piston
3g7386 Pump Gp-Gear
1u1987 Pump Gp-Gear
1U***87Pump Group-Gear1
3G***02Pump Group-Gear1
3G***86Pump Group-Gear1
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3g0302 Pump Gp-Gear
9j7903 Pump Gp-Auxiliary Gear
9t4705 Pump Gp-Gear
3G***85Pump Group-Gear; Gear Pump Group Dowty Pak1
9T***04Pump Group-Gear1
9T***05Pump Group-Gear1
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9t4704 Pump Gp-Gear-Swing & Pilot
3g7385 Pump Gp-Gear-Swing & Pilot
3G***85Pump Group-Gear; Gear Pump Group Dowty Pak1
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9t5187 Pump Gp-Piston
9t9351 Pump Gp-Piston
9t2280 Rotating Gp
9t3714 Rotating Gp-Pump
9t3870 Rotating Gp-Pump
6w6324 Service Gp-Auxiliary Pump Lines
6W***24Service Group-Auxiliary Pump Lines1
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6w6325 Service Gp-Auxiliary Pump Lines
6W***25Service Group-Auxiliary Pump Lines1
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9t2282 Shaft Gp
9T***82Shaft Group; -Hydraulic Oil Cooling-Radiator1
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9t4221 Shaft Gp
9t4222 Shaft Gp-Stub
9c3437 Support Gp-Valve & Filter
7n9179 Switch & Handle Gp
9t9397 Swivel Gp
9t5717 Swivel Gp
9t1950 Tank Gp-Hydraulic
4d0487 Valve As-Check
4D***87Valve As-Check; -Air Supply-Primary Air Tank-Service Brake Control1
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9t9162 Valve Gp
6e2938 Valve Gp
6e4733 Valve Gp
6e4735 Valve Gp
9t3767 Valve Gp
9t9164 Valve Gp
6e0447 Valne Gp-Bank
9t0133 Valve Gp
9t1745 Valve Gp
6e2934 Valve Gp-Air Control
6e0446 Valve Gp-Bank
8j2601 Valve Gp-Track Brake
6e3528 Valve Gp-Breaker Relief
6E***28Valve Group-Breaker Relief; -Sound Suppression1
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9t2843 Valve Gp-Breaker Relief
6e3593 Valve Gp-Check & Relief
9t1082 Valve Gp-Check & Relief
9T***82Valve Group-Check & Relief; (Stick)1
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9t9157 Valve Gp-Combination
3g3816 Valve Gp-Control
6e4732 Valve Gp-Control-Part 1 Of 2
6e4732 Valve Gp-Control-Part 2 Of 2
9t9161 Valve Gp-Control-Part 1 Of 2
9t9163 Valve Gp-Control-Part 1 Of 1
6e2937 Valve Gp-Control-Part 1 Of 2
6e2933 Valve Gp-Control-Part 1 Of 2
3g7256 Valve Gp-Control
6e2933 Valve Gp-Control-Part 2 Of 2
6e2937 Valve Gp-Control-Part 2 Of 2
3g3817 Valve Gp-Control
6e4734 Valve Gp-Control-Part 2 Of 2
9t9161 Valve Gp-Control-Part 2 Of 2
9j8573 Valve Gp-Control
6e4734 Valve Gp-Control-Part 1 Of 2
9j2084 Valve Gp-Drain
6e3322 Valve Gp-Pilot
4t9980 Valve Gp-Pilot
9t2630 Valve Gp-Pilot
8j4356 Valve Gp-Pilot
3g3818 Valve Gp-Control
3G***18Valve Group-Pilot Travel & Steer1
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3g8407 Valve Gp-Pitch Relief
3G***07Valve Group-Pitch Relief1
4T***95Valve Group-Relief; Relief Valve Group1
4T***96Valve Group-Relief; Relief Valve Group1
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8j2057 Valve Gp-Pitch Relief
3g8408 Valve Gp-Pitch Relief
3G***08Valve Group-Pitch Relief1
4T***93Valve Group-Relief; Relief Valve Group1
4T***99Valve Group-Relief; Relief Valve Group1
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6e3185 Valve Gp-Relief
9j8732 Valve Gp-Relief
4t7596 Valve Gp-Relief-Pilot Operated
4T***96Valve Group-Relief; Relief Valve Group1
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4t7595 Valve Gp-Relief-Pilot Operated
4T***95Valve Group-Relief; Relief Valve Group1
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4t9296 Valve Gp-Relief-Pilot Operated
9t9159 Valve Gp-Relief
4t5572 Valve Gp-Relief
6e1125 Valve Gp-Relief
9t6720 Valve Gp-Relief
9t0122 Valve Gp
6e1151 Valve Gp-Relief
6e2842 Valve Gp-Relief
9j2041 Valve Gp-Relief
3g9011 Valve Gp-Relief
4t7593 Valve Gp-Relief-Pilot Operated
06***39Seal-O-Ring1
3G***26Nut; (3/8-40-Thd)1
3G***54Cap1
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4t7599 Valve Gp-Relief-Pilot Operated
4T***99Valve Group-Relief; Relief Valve Group1
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8j2602 Valve Gp-Selector
5c9971 Valve Gp-Selector
9t5584 Valve Gp-Selector
9t3672 Valve Gp-Selector
6t8208 Valve Gp-Solenoid
6t5859 Valve Gp-Solenoid-24 Volt
6T***59Valve Group-Solenoid; (Ride Control)1
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9j8145 Valve Gp-Solenoid
9J***45Valve Group-Solenoid; (Solenoid)1
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7t9746 Valve Gp-Solenoid
7T***46Valve Group-Solenoid; (Warm-Up & Boom Float)1
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3g7258 Valve Gp-Solenoid
3g7259 Valve Gp-Solenoid
Lubrication System
1w2638 Filter Gp-Engine Oil
7e4116 Gauge Gp-Oil Level
7E***16Gauge Group-Oil Level (Dipstick)1
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7c6490 Lines Gp-Engine Oil
1w2206 Pump Gp-Engine Oil
Power Train
9c5969 Brake Gp-Parking
6w1445 Brake Gp-Parking
3v4487 Control Gp-Swing Brake
6w2738 Drive Gp-Swing-Part 2 Of 2
6w2738 Drive Gp-Swing-Part 1 Of 2
9c3307 Final Drive Gp
Service Equipment And Supplies
Name Plates & Films
1P***07Film-Symbol; 2 On Bottom Of Upper Frame Below Engine. 2 On Front Of Upper Frame Above Boom Articulation3
3E***85Film-Warning-On Underside Of Access Door1
3E***95Film-Instruction1
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Starting And Electrical System
5n6704 Starting Motor Gp-Electric
4n3181 Starting Motor Gp-Electric*R
3T***05Starting Motor Group-Electric; Starting Motor Group (Robert Bosch)1
4N***81Starting Motor Group-Electric1
8C***51Starting Motor Group-Electric; Starting Motor Gp-Electric-Delco-Remy1
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3t6305 Starting Motor Gp-Electric
3T***05Starting Motor Group-Electric; Starting Motor Group (Robert Bosch)1
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7s3622 Starting Motor Gp-Electric
7S***22Starting Motor Group-Electric; Electric Starting Motor Group1
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9x4447 Starting Motor Gp-Electric-24 Volt
9X***47Starting Motor Group-Electric; Electric Starting Motor Group (Nippondenso)1
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8c3651 Starting Motor Gp-Electric
8C***51Starting Motor Group-Electric; Starting Motor Gp-Electric-Delco-Remy1
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7v1146 Alarm Gp-Travel
6n9294 Alternator Gp*R
3T***52Alternator Group-Charging1
6N***94Alternator Group; (24-Volt, 35-Ampere)1
7N***20Alternator Group; Alternator Group (Robert Bosch)1
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7n9720 Alternator Gp
7N***20Alternator Group; Alternator Group (Robert Bosch)1
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8n9512 Alternator Gp
6t7223 Alternator Gp
6T***23Alternator Group-Charging; Alternator Group-Nippondenso -- 24 Volt, 50 Ampere1
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3e7578 Alternator Gp-Charging*R
3E***78Alternator Group-Charging; Charging Alternator Group (Delco Remy)1
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3t1888 Alternator Gp
3T***88Alternator Group-Charging; Alternator Group Delco-Remy 24 Volt, 50 Ampere1
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1005046 Alternator Gp-Charging-24 Volt, 50 Ampere
10***46Alternator Group-Charging; -24-Volt, 50-Ampere1
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9g4574 Alternator Gp
9G***74Alternator Group-Charging; Alternator Group (Nippondenso)1
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5s9088 Alternator Gp-Charging*R
3E***78Alternator Group-Charging; Charging Alternator Group (Delco Remy)1
3T***88Alternator Group-Charging; Alternator Group Delco-Remy 24 Volt, 50 Ampere1
5S***88Alternator Group-Charging1
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3t6352 Alternator Gp-Part 1 Of 2
1005047 Alternator Gp-Charging-24 Volt, 50 Ampere*R
10***45Alternator Group-Charging; (Nippondenso)1
10***46Alternator Group-Charging; -24-Volt, 50-Ampere1
10***47Alternator Group-Charging; -24-Volt, 50-Ampere1
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9g9538 Alternator Gp
7n8943 Alternator Gp-Charging
3t6352 Alternator Gp-Part 2 Of 2
7e9513 Alternator Gp
1005045 Alternator Gp-Charging-24 Volt, 50 Ampere
10***45Alternator Group-Charging; (Nippondenso)1
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6w7872 Battery & Wiring Gp-Part 2 Of 2
6w7872 Battery & Wiring Gp-Part 1 Of 2
8k2506 Battery Gp-Heavy Duty
3v1962 Control Gp-Electric
3V***62Control Group-Electric; Electric Hand Control Group1
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8v5902 Horn Gp-Electric
0S***09Bolt (3/4") Filler Tube Assembly To Transfer Drive Case2
0S***19Bolt,Machine Gear Retaining Part Of Kit P/N 1w***464
0S***21Bolt --Brace To Starting Engine Mounting Pad; Bolt-- Brace To Starting Engine Mounting Pad2
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8c5582 Lamp Gp-Flood
9w1279 Lamp Gp-Flood
3v1994 Lighting Gp-Boom
3v4500 Lighting Gp-Flood Lamp
4n9314 Shut-Off Gp-Electrical-24 Volt
6t6122 Solenoid As-Shut-Off
6T***22Solenoid As-Shutoff; Solenoid Gp-Shut-Off--Ledex Inc1
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6n9987 Solenoid Gp-Shut-Off
6N***87Solenoid Group-Shutoff1
6T***26Solenoid Group-Shutoff; Solenoid Gp-Shut-Off1
6T***22Solenoid As-Shutoff; Solenoid Gp-Shut-Off--Ledex Inc1
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6t4126 Solenoid Gp-Shut-Off
6T***26Solenoid Group-Shutoff; Solenoid Gp-Shut-Off1
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7n8884 Solenoid Gp-Shut-Off
7N***84Solenoid Group-Shutoff; Solenoid Gp-Shut-Off1
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8r8598 Starting Aid Gp-Ether
4n3354 Starting Ar-Electric
4N***54Starting Ar-Electric1
7S***22Starting Motor Group-Electric; Electric Starting Motor Group1
8K***06Battery Group1
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2g3970 Switch & Handle Gp
7n0718 Switch As-Disconnect
7N***18Switch As-Disconnect; -Battery-Ground Level1
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9g7641 Switch Gp-Start
9G***41Switch Group-Start; -Engine, Key-Vims Service1
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9v8878 Wiring Gp-Cab-Part 2 Of 2
4e4300 Wiring Gp-Cab-Part 1 Of 2
9v8878 Wiring Gp-Cab-Part 1 Of 2
4e4300 Wiring Gp-Cab-Part 2 Of 2

225D serial number reference

The PIN or serial number is located on a metal identification plate, typically riveted to the machine's main frame, right-hand side, below the cab or near the boom base. The serial number consists of a 3-character alphanumeric prefix followed by a 5-digit sequence ID (00001–99999). For models built after 2001, the serial number is the last 8 characters of the 17-character PIN.

PrefixIdentifies
2SJStandard 225D
6RGStandard 225D

Frequently asked questions

Which engine models power the Caterpillar 225D?

The 225D utilizes either a 3304 engine with 150 hp (112 kW) or a 3208 engine providing 165 hp (123 kW), depending on the specific configuration.

What is the operating weight of this excavator?

Operating weight varies by configuration, ranging from approximately 55,998 lb (25,400 kg) for standard models to 58,863.5 lb (26,700 kg) for LC variants.

What machine replaced the Caterpillar 225D?

The provided documentation does not specify a direct successor model for the 225D.

What 225D owners discuss

What are the common symptoms of a failing pump drive or gearbox on the 225D?
Clanking noises during engine cranking or shutdown may indicate wear between the aluminum flywheel drive ring and the pump drive spider. The spider contains multiple rubber tips that can wear out. Additionally, ensure the gearbox breather is clean and oil levels are correct without overfilling to prevent issues.
How can a 'jerky' boom operation be diagnosed in machines equipped with dual pump flow pedals?
If the machine has a floor pedal for dual pump flow (boom up and stick out), a low crossover spool setting may cause the flow to dead-end one pump before the main boom spool moves. This results in noise and jerky movement. Check if the solenoid or pilot valve is chattering using a stethoscope.
What should be inspected regarding the undercarriage when the tracks appear loose or 'sloppy'?
Inspect the rollers, sprockets, and idlers. If rollers are worn, they may require rebuilding if bearings are intact. For extreme wear, some operators tension the tracks by removing a link from the chain. On long-track machines in cold climates, welding guides between top rollers and idlers can help maintain track position.
What engine is used in the Caterpillar 225D and what are its primary specifications?
The 225D is powered by a 3208 engine with a displacement of 427 cu in (7,001 cu cm). It delivers a net power of 150 hp (112 kW).
What are the recommended hydraulic and engine oil specifications for Caterpillar machines?
For hydraulic systems, use Cat HYDO Advanced oils or SAE 10W oil meeting Caterpillar TO-4 specification. For engines, use Caterpillar DEO (Diesel Engine Oil) in weights such as SAE 15W-40 or SAE 10W-30. Avoid exceeding 10% cross-contamination when switching between different hydraulic oil brands to prevent sludge formation.
What should a buyer check for when inspecting a used Caterpillar 225D?
Verify the exact serial prefix (e.g., 2SJ) and installed attachment package, as configurations change weight and reach. Check for hydraulic leaks in cylinders, inspect the pump drive gearbox oil level and breather, and examine the undercarriage for worn rollers or loose chains. Inspect the boom for safety check valve operation; if present, have your dealer verify pressures with appropriate gauges.

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.

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