Caterpillar 561M
Caterpillarpipelayer(no series)

Caterpillar 561M

Maintenance schedule, common problems & OEM parts breakdown

The Cat 561M is a crawler-mounted, elevated-sprocket pipelayer (side boom) built for pipeline construction and heavy pipe-handling work. It runs Caterpillar's 3116 turbocharged diesel, rated at 90 kW (121 hp) gross and 82 kW (110 hp) net at 2100 rpm, mechanically governed with individual unit injectors and no engine ECM. Operating weight is 16,240 kg (35,804 lb) with a rated lift capacity of 18,145 kg (40,000 lb); shipping weight runs lighter at roughly 15,318 kg (33,770 lb) before fuel, boom and operator are added. Factory literature is dated 1997, placing this generation in the mid-to-late 1990s. It followed the mechanical-era 561B/C/D pipelayers of the 1970s and 1980s and was itself replaced by the 561N by the mid-2000s. Standard configuration ships with an 18 ft (5.49 m) boom, extendable segmented counterweight, and rigid drawbar; high-flange track guiding rollers, a reversible fan, and cold-start packages were factory options, so exact weight and equipment vary by configuration.

Compared with earlier mechanical 561-series pipelayers, the M-series moved to fully hydraulic load-line and boom winches, a modular power-train layout for fast component exchange, and an Electronic Monitoring System gauge package for coolant and power-train oil temperature. The 3116 engine replaced the older 3306 with higher torque rise and unit-injected fuel delivery for better response and lower fuel burn. When the 561N arrived, it kept the same elevated-sprocket chassis, planetary powershift transmission, and hydraulic drawworks architecture but moved to an electronically controlled engine with more power and lower emissions. That continuity is why the 561M still matters in the resale and parts market: it is the last mechanically governed, non-ECM generation of this pipelayer platform, valued by contractors who prefer to avoid electronic fuel-system diagnostics in the field, and its drivetrain, undercarriage and winch architecture carried forward into the next generation, which keeps wear parts easier to source than for the older mechanical-drawworks 561D-era machines.

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 561M specifications

Engine

Engine modelCat 3116, four-stroke-cycle, six-cylinder, turbocharged direct-injection diesel
Gross power90 kW (121 hp) at 2100 rpm
Net power82 kW (110 hp) at 2100 rpm (rated per Caterpillar, ISO 9249, EEC 80/1269 and SAE J1349; 114 PS per DIN 70020)
Displacement6.6 L (403 cu in), bore 105 mm (4.13 in) x stroke 127 mm (5.0 in)
Emissions tierNot stated on the factory spec sheet for this generation (literature dated 1997); no certification tier published

Weights

Operating weight16,240 kg (35,804 lb) - standard config: 5.49 m (18 ft) boom, extendable counterweight extended, full fuel, operator, boom and pulley blocks
Shipping weight15,318 kg (33,770 lb) - includes lubricants, coolant, 10% fuel, 510 mm (20 in) single-grouser shoes, drawbar and counterweight, no boom/pulley blocks
Ground pressure59.87 kPa (8.69 psi) with 510 mm (20 in) shoes

Dimensions

Overall length (transport)3,730 mm (147 in / 12.25 ft)
Overall width3,193 mm (125.7 in / 10.5 ft)
Overall height3,124 mm (123 in / 10.25 ft)
Track gauge2,000 mm (79 in)
Length of track on ground2,619 mm (103 in)
Ground contact area2.67 m2 (4,120 in2) with 510 mm (20 in) shoes
Configuration notePublished diagram dimensions are with the extendable counterweight in the extended position; figures shift with boom length and shoe width options

Performance

Travel speed, forward (3-speed power shift, approx.)3.27 / 5.81 / 9.93 km/h (2.03 / 3.61 / 6.17 mph)
Travel speed, reverse (3-speed power shift, approx.)4.01 / 7.09 / 12.06 km/h (2.49 / 4.41 / 7.49 mph)
Max lift capacity18,145 kg (40,000 lb) per SAE J743
Hydraulic pipelaying system flow/pressure211 L/min (55.7 gpm) at 18,616 kPa / 186 bar (2,700 psi), 2200 rpm pump speed, independent of torque converter
GradeabilityNot published in factory literature

Service capacities (summary)

Fuel tank218 L (57.6 gal)
Hydraulic system (implement, incl. tank)67 L (17.7 gal); hydraulic tank alone 32 L (8.5 gal)
Engine oil (crankcase and filter)26 L (6.9 gal)
Cooling system46 L (12 gal)
Transmission, bevel gear and steering clutch (incl. torque converter or oil clutch)105 L (27.7 gal)

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

561M fluids & capacities

SystemCapacityRecommended fluid
Engine crankcase (with filter) - Cat 3116 turbocharged diesel26 L (6.9 US gal)Cat DEO multigrade diesel engine oil (Cat DEO-ULS is an equivalent alternate). SAE 10W-30 is the preferred grade for the 3116 engine across -18°C to 40°C (0°F to 104°F). Use SAE 15W-40 in warmer climates, -9.5°C to 50°C (15°F to 122°F). Below -18°C step down through SAE 5W-40, 5W-30, 0W-40, or 0W-30 (down to -40°C/-40°F) using Cat DEO SYN or Cat Arctic DEO SYN synthetic oil.
Cooling system46 L (12 US gal)Cat ELC (Extended Life Coolant) is preferred, premixed 1:1 with water for freeze protection to -37°C (-34°F); Cat ELC Concentrate extends protection to -52°C (-62°F) for arctic climates. Cat DEAC conventional heavy-duty antifreeze/coolant is an acceptable alternate. A minimum 30 percent glycol content is required in all climates.
Fuel tank218 L (57.6 US gal)Distillate No. 2-D diesel meeting Cat's off-highway diesel fuel specification, minimum cetane 40. Blend with No. 1-D fuel in winter for cold-flow/cloud-point control in cold climates. Ultra-low-sulfur diesel is acceptable but not mandated for this engine.
Transmission, bevel gear and steering clutch (powertrain compartment, includes torque converter)105 L (27.7 US gal)Cat TDTO (Transmission/Drive Train Oil). Grade by climate: SAE 0W-20 (-40 to 10°C / -40 to 50°F), SAE 10W (-20 to 10°C / -4 to 50°F), SAE 30 (0 to 35°C / 32 to 95°F), or SAE 50 (10 to 50°C / 50 to 122°F). Cat TDTO-TMS multi-season blend covers -20 to 43°C (-4 to 110°F).
Final drive (each side)6 L (1.6 US gal) per sideCat TDTO is the first-choice oil for 561M final drives - this model is a named exception to the Cat FDAO recommendation used on other elevated-sprocket pipelayers and large track-type tractors. Grade runs from SAE 0W-20 in deep cold up to SAE 50 in hot climates. Cat FDAO SYN or a commercial FD-1 oil are acceptable second-choice alternates.
Boom winch gear case5.7 L (1.5 US gal)Cat TDTO, from the same powershift/winch-gear-case group as the transmission. Grade follows ambient temperature, SAE 0W-20 in extreme cold up to SAE 50 in hot climates; Cat TDTO-TMS multi-season blend where the winch is hydraulically driven.
Implement hydraulic system, includes hydraulic tank67 L (17.7 US gal) total system, of which 32 L (8.5 US gal) is the hydraulic tankCat HYDO Advanced 10 is preferred across -20°C to 40°C (-4°F to 104°F). Cat HYDO, Cat TDTO, Cat MTO, or Cat DEO are acceptable alternates at other viscosity grades outside that band, from SAE 0W-20 in arctic cold to SAE 30 in hot climates.
Recoil spring compartment, each side (track roller frame pivot)16 L (4.2 US gal) per sideCat TDTO (or TDTO-TMS / Arctic TDTO / commercial TO-4 equivalent). Viscosity by climate spans SAE 0W-20 in deep cold to SAE 50 in hot conditions.
Grease - pin joints, track, boom and winch pivots (spec only, no fixed refill volume)not applicable - lubricated by grease gun at scheduled points, not a sump fillCat Advanced 3Moly Grease (NLGI 2) for standard to medium-duty pin joints, -20°C to 40°C (-4°F to 104°F). Cat Ultra 5Moly Grease (NLGI 1) for heavily loaded, high-impact pins and boom/winch pivots, -35°C to 40°C (-31°F to 104°F). Cat Multipurpose Grease (NLGI 2) for low-severity points, -30°C to 40°C (-22°F to 104°F).

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

Caterpillar 561M maintenance schedule

Service intervalTasks
Every 50 h
  • Check engine oil level before starting and top off with the specified diesel engine oil grade
  • Check coolant level at the sight gauge and inspect the modular radiator core for external leaks
  • Walk down both track frames checking for loose shoes, abnormal wear at the elevated sprocket teeth, and oil weeping at the final drive seals
  • Test the back-up alarm and every EMS gauge function before moving the machine
  • Drain water and sediment from the fuel tank and check the water separator bowl
  • Grease boom and hook winch pivot points, boom-mount bearings, and counterweight linkage
Every 250 h
  • Change engine oil and the engine oil filter and pull an oil sample if enrolled in scheduled sampling
  • Inspect and clean the dry-type air cleaner primary element and replace on the service-indicator signal
  • Check oil level in the powershift transmission/bevel-gear/steering-clutch case and in both final drive housings
  • Inspect alternator belt condition and tension and clean terminals on both 12-volt batteries
  • Check hydraulic tank oil level and inspect ecology drains on the radiator, hydraulic tank, and power-train components for seepage
Every 500 h
  • Replace both fuel filters and the water separator element
  • Pull an oil sample from the transmission/bevel-gear/steering-clutch case and from each final drive housing
  • Inspect boom and hook winch wire rope for broken strands, crushing or corrosion and check drum and sheave wear
  • Check track sag and adjustment on both sides and inspect roller frame pivot bushings for play
  • Test oil-disc clutch and brake response through the full steering range
Every 1,000 h
  • Change powershift transmission/bevel-gear/steering-clutch oil and clean the magnetic drain plug
  • Change final drive oil in both housings
  • Change boom and hook winch gear oil
  • Sample engine coolant and check condition against the corrosion-inhibitor and glycol specification
  • Inspect the turbocharger for shaft play and exhaust leakage
  • Check torque converter stall speed and power-train oil temperature under load
Every 2,000 h
  • Change oil in the recoil spring compartments on both sides
  • Inspect elevated sprocket segments and drive hub splines for wear and rotate or replace segments as needed
  • Check valve lash on the 3116 engine and adjust as required
  • Inspect steering clutch and brake discs for wear and adjust or replace packs
  • Pressure-test the implement hydraulic system at the diagnostic taps against the counterweight and hook/boom relief valve settings
Every 3,000 h
  • Replace engine coolant, or service per the corrosion-inhibitor/extender schedule, and flush the cooling system
  • Inspect the water pump and rebuild or replace it as a unit if seepage or bearing play is found
  • Inspect the torque converter and powershift clutch packs for wear and rebuild if slip or delayed engagement appears
  • Re-torque mainframe and roller frame mounting hardware and check for stress cracking near the pipelayer structure mounts
Every 6,000 h
  • Pull final drive hubs for gear and bearing inspection and exchange with Cat reman hubs if wear limits are reached
  • Inspect the cylinder block for reboring; the 3116's parent-metal block accepts up to two overbores with dry sleeves at major overhaul
  • Rebuild or exchange boom and hook winch motors and brake packs
  • Inspect heavy-duty sealed and lubricated track chain for pin and bushing wear and turn or replace track as the sealed lubricant reservoir depletes
  • Evaluate segmented counterweight pins and bushings, and boom-mount bearings, for full teardown replacement

Servicing the 561M beyond the schedule

Predictive Maintenance & Fluid Analysis

The 561M's 3116 engine runs mechanical unit injectors with no ECM, so there are no fault codes to watch. Scheduled oil sampling is the main early-warning tool. Pull separate samples from the engine, the powershift transmission/bevel-gear/steering-clutch case, each final drive, and the boom/hook winch gearcases, since none share a common sump. Watch the EMS coolant and power-train oil temperature gauges for gradual drift, and track wire rope and elevated-sprocket segment wear closely, since undercarriage damage often hides until a shoe or bushing fails in service.

Corrective & Common Repairs

Typical 561M repairs center on the drawworks and undercarriage: oil-disc brake packs in the boom and hook winches wearing unevenly, boom-mount bearings needing replacement after side-load abuse, and segmented sprocket teeth chipping in rocky trench spoil. Dual fuel filters and the water separator clog quickly on field-stored diesel, causing hard starting and power loss. Torque converter slip or delayed powershift engagement usually traces to worn clutch packs or low transmission oil. The water pump is designed to be serviced or rebuilt as a unit rather than replaced whole.

Overhaul & Rebuild Points

The 3116's parent-metal cylinder block can be rebored twice and fitted with dry sleeves, giving the engine a genuine second life at major overhaul; connecting rods pull out through the cylinder tops without dropping the crank, and camshaft followers service without pulling the cam. At the undercarriage, elevated final drive hubs and segmented sprockets are built for modular exchange rather than full teardown. Cat reman starters, alternators, cylinder heads, short blocks and final drive hubs are the practical route back to like-new condition on a machine this age.

Seasonal & Environment Servicing

Cold-climate 561Ms benefit from the factory ether starting aid and dealer-installed 120/240-volt coolant heater, plus heavy-duty batteries for reliable cranking below freezing. In abrasive or rocky right-of-way work, the heavy-duty sealed and lubricated track holds up better than standard chain, and the radiator core protection grid with the precleaner-with-prescreener option earns its keep against dust and windblown debris. On routes crossing wetlands or waterways, lean on the ecology drains at the radiator, hydraulic tank and power-train components to keep fluid changes spill-contained.

561M common service parts

Part numberPart
112-6523Insert-Fuel FilterCheck fitment →
1R-0751Filter-FuelCheck fitment →
7E-5189Valve AsCheck fitment →
117-4089Element-Water SeparatorCheck fitment →
6I-2499Filter Element As-AirCheck fitment →

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

561M fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
CID 0096 FMI 03/04Fuel level sender circuit voltage abnormal (above or below normal range)Open circuit or short to power supply (FMI 03) or short to ground/corroded connector (FMI 04) on the fuel level sender wiring, or a failed sender unitInspect the fuel sender harness and connector for damage or corrosion, check sender supply voltage, replace the sender if wiring tests good
CID 0100 FMI 03/04Engine oil pressure sensor circuit voltage abnormal (above or below normal range)Open circuit or short to supply (FMI 03) or short to ground (FMI 04) in the oil pressure sensor wiring, or a failed sensorCheck harness continuity and connector condition at the oil pressure sensor, verify sensor supply voltage, replace sensor if the circuit checks out good
CID 0110 FMI 03/04Engine coolant temperature sensor circuit voltage abnormal (above or below normal range)Open circuit or short to supply (FMI 03) or short to ground/wiring fault (FMI 04) at the coolant temperature sensorInspect sensor wiring and connector, confirm sensor ground and supply, replace the sensor if wiring is sound
CID 0826 FMI 03/04Torque converter/power train oil temperature sensor circuit voltage abnormalDamaged or corroded wiring to the power train oil temperature sensor, or a failed sensorCheck the power train oil temp sensor circuit for opens/shorts, inspect connector, replace sensor if wiring is confirmed good
CID 0168 FMI 02Electrical system (battery) voltage erratic, intermittent, or incorrectLoose or corroded battery cable/ground connection, failing alternator regulation, or an intermittent charging circuit faultCheck battery terminals and ground straps, load-test the battery, verify alternator output using the machine's electrical diagnostic connector
CID 0600 FMI 03/04Hydraulic oil temperature sensor circuit voltage abnormalWiring fault or connector corrosion at the hydraulic oil temperature sensor, or a failed sensorInspect sensor wiring and connector, confirm supply/ground, replace sensor if circuit tests good
CID 0271 FMI 03/05/06Action alarm circuit fault (voltage or current abnormal)Open or shorted wiring to the action alarm/warning horn, or a failed alarm driverCheck alarm wiring and connector, verify power and ground at the alarm, replace the alarm module if wiring is good
CID 0248 FMI 02Data link erratic, intermittent, or incorrect communication between the monitoring system and other machine modulesDamaged data link wiring, poor connector contact, or a module communication faultInspect data link wiring and connectors for damage, check for proper termination, retest with a dealer diagnostic tool

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

561M attachments & work tools

Boom and winch system (primary work tool)

Tubular cast-steel boom, 5.49 m (18 ft) square-section standard length, uses replaceable boom-mount bearings and a symmetrical design that allows simplified left- or right-side installation. Boom and hook drawworks each run off independent planetary hydraulic winches with oil-disc brakes for smooth speed control and positive position retention, plus infinitely variable speed control and an emergency free-fall function on the load line.

Load line, hook and rigging

Standard rigging uses 16 mm (5/8 in) diameter wire rope rated at roughly 18,700 kg (41,200 lb) minimum breaking strength, reeved 3-part on both the load line and the boom line. Hook line speed varies with reeving and drum fill, running roughly 11 to 70 m/min (36 to 228 ft/min) depending on configuration and part-line setup.

Counterweight system

Segmented, hydraulically extendable counterweight totals about 3,270 kg (7,208 lb) fully extended, controlled by a single-lever hydraulic control for load balance and improved operator visibility. A mechanical service latch locks the counterweight in the extended position for transport or servicing.

Rated lift capacity

Maximum lift capacity is rated near 18,150 kg (40,000 lb) per SAE J743 at minimum load overhang, dropping off sharply as overhang increases per the capacity chart. ANSI/ASME B30.14 rated load capacity runs lower than the SAE maximum across the working range, and actual capacity depends on boom angle, reeving, and counterweight extension.

Drawbar / towing coupling

Standard equipment is a rigid drawbar, upsized versus prior pipelayer generations with a larger jaw opening and pin diameter, used to tow pipeline skids, sleds and trailers. This drawbar is the sole towing interface on the machine; there is no quick-attach coupler system for interchangeable buckets, blades or forks as on excavators or loaders.

Undercarriage and track options

Standard track shoe is a 510 mm (20 in) single-grouser heat-treated steel shoe running on Heavy Duty Sealed and Lubricated track chain. High-flange track rollers and extended-length track rollers are factory options for improved guiding on side-slope pipeline work, and center track guiding guards are standard.

Guarding and protection options

Factory guarding options include a heavy-duty hinged radiator grille, radiator core protection grid, extreme-service crankcase guard (upgrade from the standard normal-service guard), and a precleaner-with-prescreener option for the dry-type air cleaner. Standard guarding covers the crankcase, fuel tank, instrument panel and rear of the machine, reflecting the exposed boom/pipeline work environment.

Pipelayer hydraulic circuit

A dedicated two-section vane pump supplies the pipelayer system independent of the torque-converter drive, delivering about 211 L/min (55.7 gpm) at 2200 pump rpm. Relief valve settings run about 19,600 kPa (2,850 psi) on the counterweight circuit and about 18,600 kPa (2,700 psi) on the hook and boom winch circuit.

Starting and operating options

Cold-weather and jobsite options include an ether starting aid, engine coolant heater (120V or 240V, dealer-installed), heavy-duty batteries, and a reversible cooling fan. A four-light lighting system and a dealer-installed tool kit are also offered as factory options; standard and optional equipment can vary by region, so confirm current offerings with the dealer.

All 561M assemblies by section

Every catalogued assembly group for the Caterpillar 561M. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Air Inlet And Exhaust System
114-5617 Air Cleaner Gp
11***64Support Assem.1
11***17Air Cleaner Group1
11***18Air Cleaner Group1
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114-5618 Air Cleaner Gp
11***18Air Cleaner Group1
6I***99Filter Element As-Air; (Primary)1
6I***00Filter Element As-Air; (Secondary)1
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100-6916 Cartridge Gp-Turbocharger
120-9770 Guard Gp-Precleaner
12***70Guard Group-Precleaner1
12***21Guard Assem.1
8T***21Washer-Hard; (11x21x2.5-mm Thk)(M10x1.50x30mm)4
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108-0332 Lines Gp-Air
10***32Lines Group-Air1
10***01Hose1
6N***09Ring (O.D. 90.5 In. Dia.)2
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7w-9248 Manifold Gp-Exhaust
10***38Manifold-Exhaust1
11***00Gasket-Manifold3
14***48Bolt; (M10x1.5x65-mm)(M10x1.50x65mm)12
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4w-3480 Manifold Gp-Inlet
11***50Gasket1
3K***60Seal Pilot Manifold On; Seal To Boom Check Valve Drain3
4W***80Manifold Group-Inlet; Inlet Manifold Group1
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115-8408 Muffler Gp
10***70Clamp-Bent Bolt1
10***91Support1
11***08Muffler Group1
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121-7746 Precleaner Gp
12***46Precleaner Group1
13***43Clamp-Hose1
1M***50Bowl1
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125-7898 Prescreener Gp
12***46Precleaner Group1
12***98Prescreener Group1
16***40Screen As1
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108-5768 Turbocharger Gp
10***57Turbocharger Group1
10***68Turbocharger Group1
3E***17Locknut; (M10x1.5-Thd)(Spiralock)4
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104-5857 Turbocharger Gp
10***16Cartridge Group-Turbocharger1
10***57Turbocharger Group1
10***77Housing1
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Basic Engine
108-5759 Camshaft Gp
10***94Plate-Thrust1
10***59Camshaft Group; (Single)1
13***76Camshaft Assem.1
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4w-3462 Carrier Gp-Seal
23***83Gasket1
24***76Seal1
2W***46Cover1
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135-1718 Cover Gp-Cylinder Block
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
11***18Bolt As; (M8x1.25x16-mm)4
12***44Cover-Oil1
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7l-0004 Cover Gp-Front Housing
10***20Cover As-Front1
13***19Seal-Integral; (Integral)1
1U***46Sealant (For Locations A)0
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4w-2172 Cover Gp-Valve Mechanism
11***40Gasket; (Valve Cover)1
11***60Cover1
4W***72Cover Group-Valve Mechanism; Valve Mechanism Cover Group1
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9y-1224 Cover Gp-Valve Mechanism
9Y***24Cover Group-Valve Mechanism; (Sound Suppression)1
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4w-2197 Crankshaft Gp
10***30Bearing-Main; (Standard)3
10***25Crankshaft Assem.1
10***02Bearing-Thrust; (Standard)1
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7e-2482 Cylinder Block Gp
14***03Cylinder Block Group1
1W***07Sleeve2
4P***51Tube As-Piston Cooling6
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129-1095 Cylinder Block Gp
12***95Cylinder Block Group1
2M***71Plug-Cup; (38.35mm Avg Od)2
2M***80Seal--To Connector Pump Outlet1
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149-5403 Cylinder Block Gp
14***02Pin, Cylinder Block As1
14***03Cylinder Block Group1
21***86Bearing-Sleeve; (Camshaft)1
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119-3065 Cylinder Head As
11***61Sleeve6
11***65Cylinder Head As1
12***53Insert-Valve Seat; (Inlet)6
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190-9066 Cylinder Head As
11***61Sleeve6
16***63Insert-Valve Seat; (Inlet)6
19***66Cylinder Head As1
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140-7373 Cylinder Head As
11***36Seal-Valve Stem12
14***73Cylinder Head As1
19***66Cylinder Head As1
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119-3067 Cylinder Head As
11***36Seal-Valve Stem12
11***65Cylinder Head As1
11***67Cylinder Head As1
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159-0305 Cylinder Head Gp
10***32Gasket; (1.61mm Thk)1
12***36Bolt-Hex Head; (M20x2.5x160mm)14
14***71Cylinder Head Group1
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4p-8263 Cylinder Head Gp
11***80Valve-Inlet6
11***36Seal-Valve Stem12
11***65Cylinder Head As1
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4p-8264 Cylinder Head Gp
10***32Gasket; (1.61mm Thk)1
12***36Bolt-Hex Head; (M20x2.5x160mm)14
1J***71Seal (10.52 Degrees I.D.); Seal-O-Ring -- To Adapter3
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140-7371 Cylinder Head Gp
11***36Seal-Valve Stem12
13***19Valve-Exhaust6
14***71Cylinder Head Group1
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160-5130 Cylinder Head Gp
14***71Cylinder Head Group1
16***30Cylinder Head Group1
1J***71Seal (10.52 Degrees I.D.); Seal-O-Ring -- To Adapter3
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115-5339 Damper & Pulley Gp
11***39Damper & Pulley Group1
16***21Damper Assem.1
4P***43Pulley1
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4p-2844 Damper & Pulley Gp
20***88Damper Assem.1
4P***43Pulley1
4P***44Damper & Pulley Group1
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7c-4532 Drain Gp-Engine Oil -Shutoff Valve
3K***60Seal Pilot Manifold On; Seal To Boom Check Valve Drain1
6V***38Valve-Shutoff; (Engine Oil Pan Drain)1
7C***32Drain Group-Oil Pan; Oil Pan Drain Group1
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7c-0044 Drive Gp-Fan
4W***03Cup-Roller Bearing2
4W***04Cone-Roller Bearing2
4W***42Spacer; (35.3x45.5x38.331-mm Thk)1
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4w-5428 Drive Gp-Water Pump
03***75V-Belt; (Pump Drive)(Water)1
10***67Plate As-Idler1
11***04Pulley As-Idler1
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7e-0519 Flywheel Gp
16***30Flywheel Assem.1
5P***45Washer-Hard; (13.5x25.5x3-mm Thk)(Turbocharger Blanking Plate)8
6V***97Bolt; (M12x1.75x40-mm)(Locking)8
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101-4540 Gear Gp-Front
10***07Shaft-Cam Idler1
10***08Plate-Retaining1
10***40Gear Group-Front1
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4w-1103 Housing Gp-Flywheel
10***51Housing-Flywheel1
1U***46Sealant (For Locations A)0
2P***94Plug-Sealing1
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101-4539 Housing Gp-Front
10***39Housing Group-Front1
10***11Plug2
13***42Housing-Front1
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4w-2515 Lifting Gp-Engine
4W***82Plate-Lifting; (Rear)(Rear)1
4W***83Plate-Lifting; (Front)1
4W***15Lifting Group1
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108-0333 Mounting Gp-Engine
10***33Mounting Group-Engine1
4B***39Plug-Drain; (Hydraulic Tank)1
8H***18Gasket Drain; To Elbow Casting1
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108-8092 Pan Gp-Oil
10***92Pan Group-Oil1
10***93Pan-Oil1
26***16Gasket-Oil Pan; (Engine)1
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107-7639 Piston & Rod Gp
10***45Crown As-Piston1
10***39Piston & Rod Group; Connecting Rod And Piston Group1
10***87Ring-Piston (Top-Chrome)1
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115-4823 Pulley Gp-Alternator
11***23Pulley Group-Alternator1
11***44Pulley-Fan1
20***11V-Belt1
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115-4822 Pulley Gp-Alternator
11***22Pulley Group-Alternator1
20***01V-Belt1
4P***51Pulley (Alternator)1
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4w-5429 Pulley Gp-Crankshaft
2W***81Plate-Clamp; (Pulley Clamp)1
4W***29Pulley Group-Crankshaft; Crankshaft Pulley Group1
7W***73Pulley-Crankshaft; (1-Groove)1
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107-7722 Rocker Arm Gp
0L***26Plug -13mm(.512 In.) Outside Dia.1
10***76Rocker Arm As; (Unit Injector)1
10***22Rocker Arm Group-Valve1
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115-4210 Seal Gp-Crankshaft
11***10Seal Group-Crankshaft1
22***10Seal Group-Crankshaft; (Clockwise Rotation)1
24***39Seal-Crankshaft; (Front)(Front)1
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7c-1770 Seal Gp-Flywheel Housing
1U***46Sealant (For Locations A)0
3D***24O-Ring - For Oil Drain & Level Plug (Items 3 & 7)1
3J***54Packing,Preformed Part Of Kit P/N 5r***271
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131-3907 Support Gp-Engine
10***98Support Assem.2
13***07Support Group-Engine1
5P***46Washer-Hard; (15.5x29x3-mm Thk)8
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4p-4372 Mechanism Gp-Fuel Pump & Valve
10***22Rocker Arm Group-Valve6
14***47Arm As-Lifter4
2D***42Ball 6.35 mm(.25 In.)Diameter2
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Cooling System
100-6269 Cooler Gp-Engine Oil
10***69Cooler Group-Engine Oil1
23***55Gasket1
26***43Core As-Engine Oil Cooler1
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110-8229 Fan Gp-Blower
10***84Bolt-Socket Head; (M10x1.5x25-mm)10
11***29Fan Group-Blower1
11***30Guard Assem.2
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125-4277 Fan Gp-Reversible
10***84Bolt-Socket Head; (M10x1.5x25-mm)10
12***77Fan Group-Reversible1
14***74Guard Assem.1
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7c-1567 Lines Gp-Water
12***48Housing-Water Regulating1
12***69Regulator-Water Temperature; (94-Deg C)1
15***99Clamp; (Hose)2
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4w-7589 Pump Gp-Water
2M***53Seal--To Seal Brake Housing To Main Housing1
4J***24Seal 46.99 mm(1.85 In.) I.D.1
4W***89Pump Group-Water1
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159-3137 Pump Gp-Water
14***88Seal As; (Water Pump)1
15***52Impeller-Pump1
15***37Pump Group-Water1
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7c-4508 Pump Gp-Water
15***37Pump Group-Water1
1J***71Seal (10.52 Degrees I.D.); Seal-O-Ring -- To Adapter1
3D***24O-Ring - For Oil Drain & Level Plug (Items 3 & 7)1
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108-8598 Radiator Gp
10***24Core As-Oil Cooler1
10***87Core As-Radiator6
10***92Tank As-Radiator1
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108-3235 Radiator Gp
10***24Core As-Oil Cooler1
10***35Radiator Group1
10***92Tank As-Radiator1
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108-3233 Radiator Gp
03***19Cap As-Radiator1
10***33Radiator Group1
10***35Radiator Group1
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108-2389 Radiator Gp
03***19Cap As-Radiator1
10***89Radiator Group1
10***98Radiator Group1
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Electrical And Starting System
107-6689 Lamp Gp-Flood
10***51Screw; (M4x32-mm)4
10***52Seal1
10***53Lens As; (Floodlight)1
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106-8964 Lamp Gp-Flood
10***64Lamp Group-Flood; -Suspended Mount1
10***51Screw; (M4x32-mm)4
10***52Seal1
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171-2065 Lamp Gp-Flood
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
15***52Bezel1
16***72Body As-Lamp1
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9x-6774 Lamp Gp-Flood -Suspended Mount
8T***37Screw; (Machine) (M4x0.7x12mm)2
8T***21Washer-Hard; (11x21x2.5-mm Thk)(M10x1.50x30mm)1
8T***33Nut (M10x1.50 Thd)1
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9x-6775 Lamp Gp-Flood
8T***37Screw; (Machine) (M4x0.7x12mm)2
8T***21Washer-Hard; (11x21x2.5-mm Thk)(M10x1.50x30mm)1
8T***33Nut (M10x1.50 Thd)1
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9x-1439 Lamp Gp-Flood
8T***37Screw; (Machine) (M4x0.7x12mm)2
8T***21Washer-Hard; (11x21x2.5-mm Thk)(M10x1.50x30mm)1
8T***33Nut (M10x1.50 Thd)1
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3e-6328 Alarm Gp
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
18***35Pin-Connector; (16-Ga To 18-Ga)2
3E***65Wedge; (Receptacle Lock) (2 Pin)1
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132-2156 Alternator Gp-Charging
03***12Screw-Forming; (10-24x0.5-In)3
12***68Kit-Alternator Guard1
13***22Rotor As-Alternator; (24-Volt)1
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108-0337 Alternator Gp-Charging
10***37Alternator Group-Charging1
11***88Guard1
11***06Bracket-Alternator1
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107-7977 Alternator Gp-Charging
03***12Screw-Forming; (10-24x0.5-In)3
10***77Alternator Group-Charging; (24 Volt-70 Amp)1
13***22Rotor As-Alternator; (24-Volt)1
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152-7238 Battery & Wiring Gp
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
11***84Spacer; (10.7x17.1x30-mm Thk)1
11***67Cable As1
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123-9051 Battery & Wiring Gp
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***81Harness Assembly-Front Chassis1
11***84Spacer; (10.7x17.1x30-mm Thk)1
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8r-8714 Battery Gp -Maintenance Free
8R***14Battery Group; -Maintenance Free1
9X***04Battery-Maintenance Free; (12 Volt)(900 Amp)2
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9x-3294 Heater Gp-Jacket Water
12***86Element As-Jacket Water Heater; (120-Volt, 1000-Watt)1
13***48Kit-Seal; (Jacket Water Heater)1
6N***04Cap As-Dust; (Jacket Water Heater Elements)1
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3t-8724 Heater Gp-Jacket Water
12***87Element As-Jacket Water Heater; (240-Volt, 1000-Watt)1
13***48Kit-Seal; (Jacket Water Heater)1
13***17Cap As-Dust1
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107-9646 Lighting Gp-Flood
10***64Lamp Group-Flood; -Suspended Mount2
10***89Lamp Group-Flood; -Vertical Mount2
10***46Lighting Group-Flood1
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146-3790 Lighting Gp-Flood
10***46Lighting Group-Flood1
14***90Lighting Group-Flood1
5P***24Wire 2.42m (1.5rd); (2-Electric Panel / 5-Conn. Light Right. (+)-Air Horn)0
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110-5083 Panel Gp-Circuit Breaker
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***98Panel As1
11***38Strip1
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7c-4028 Solenoid Gp-Shutoff
15***52Solenoid As; (Fuel Shutoff)1
4B***74Washer (Required Only When Bosch Alternator Is Fitted)1
4K***88Seal; Adapter To Oil Pump Outlet Manifold1
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102-8823 Starting Aid Gp
10***58Cover-Inlet Manifold1
10***62Elbow1
10***23Starting Aid Group; (Heater)1
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107-5671 Starting Aid Gp-Ether
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***03Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge)1
10***71Starting Aid Group-Ether1
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207-1519 Starting Motor Gp-Electric
03***23Bolt; (1/4-28x1-In)5
10***63Terminal As-Starter1
10***49Housing As-Starter1
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106-8559 Starting Motor Gp-Electric
03***21Shim Lever Housing1
03***23Bolt; (1/4-28x1-In)5
10***63Terminal As-Starter1
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145-5157 Starting Motor Gp-Electric
10***08Bolt (M10x1.5x35mm); (M10x1.5x35-mm)3
14***57Starting Motor Group-Electric1
1S***51Terminal-Cable; (00-Ga, 1/2-In Screw)1
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207-1517 Starting Motor Gp-Electric
03***23Bolt; (1/4-28x1-In)5
10***63Terminal As-Starter1
10***49Housing As-Starter1
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106-8558 Starting Motor Gp-Electric
10***58Starting Motor Group-Electric1
10***59Starting Motor Group-Electric; Electric Starting Motor Group (Delco Remy)1
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111-4275 Starting Motor Gp-Electric
10***58Starting Motor Group-Electric1
11***75Starting Motor Group-Electric; (Cold Weather)1
11***73Bolt-12 Point Head; (M10x1.5x35-mm)3
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7n-0718 Switch Gp-Disconnect -Battery
2H***22Lockwasher2
6F***45Nut-Full; (3/8-24-Thd)2
7N***18Switch As-Disconnect; -Battery-Ground Level1
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164-7577 Switch Gp-Bypass
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
16***77Switch Group-Bypass; -Xmsn Lubrication Supply Filter-Xmsn Lubrication Charge Filter-Hoist Screen-Tc, Front Brake Cooling-Transmission Oil Filter-Rear Axle Oil Filter1
18***35Pin-Connector; (16-Ga To 18-Ga)2
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9x-7781 Switch Gp-Bypass
3D***24O-Ring - For Oil Drain & Level Plug (Items 3 & 7)1
4B***43Nut,Plain,Hexagon Plate Mtg2
4B***63Washer; (4.7x11x1.2-mm Thk)2
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175-2324 Switch Gp-Magnetic
01***80Lockwasher2
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
17***17Switch As-Magnetic1
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167-0138 Switch Gp-Magnetic
15***61Wedge-Plug Lock; (2-Pin)1
15***70Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)1
16***38Switch Group-Magnetic; -Main Relay-Main Power Relay1
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175-2322 Switch Gp-Magnetic
01***80Lockwasher2
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
17***22Switch Group-Magnetic; -Air Inlet Heater, Start Relay1
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3e-0075 Switch Gp-Magnetic
17***22Switch Group-Magnetic; -Air Inlet Heater, Start Relay1
17***24Switch Group-Magnetic; -Air Inlet Heater, Start Relay1
3E***75Switch Group-Magnetic; -Air Inlet Heater, Start Relay1
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9g-7641 Switch Gp-Start -Engine, Key
6V***62Screw-Machine; (8-32x0.31-In)4
7T***99Nut-Mounting; (1-32-Thd)1
9B***33Lockwasher; (Int'L Tooth)4
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123-4984 Wiring Gp-Engine
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***50Wire Assem.1
11***50Harness Assembly-Engine1
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123-4986 Wiring Gp-Platform
11***87Film-Panel1
11***83Panel Group-Circuit Breaker1
12***86Wiring Group-Platform1
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Engine Arrangement
114-4508 Engine Ar
10***69Cooler Group-Engine Oil1
10***39Housing Group-Front1
10***40Gear Group-Front1
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114-4509 Engine Ar
10***69Cooler Group-Engine Oil1
10***39Housing Group-Front1
10***40Gear Group-Front1
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114-4511 Installation Ar-Engine
10***09Torque Converter Group1
10***32Lines Group-Air1
10***33Mounting Group-Engine1
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Frame And Body
145-4350 Case & Frame Gp
10***86Valve As-Drain; (Ecology)1
10***87Plug-Drain; (Power Train Oil Tank)1
11***09Tube1
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142-4127 Counterweight Gp-Hydraulic
10***08Frame As-Counterweight1
10***10Link As2
10***13Pin As2
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107-7235 Drawbar Gp
10***35Drawbar Group1
13***64Drawbar Assem.1
7B***63Latch Uoc:Bsu,Bsw1
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108-1866 Enclosure Gp-Engine
0S***75Pin-To Arm Assembly And Retainer1
10***66Enclosure Group-Engine1
11***43Plate2
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107-7236 Enclosure Gp-Fender
10***36Enclosure Group-Fender1
10***60Spring1
11***83Cover Assem.; (R.H.)1
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145-4347 Fender Gp
11***88Fender Assem. (L.H.)1
11***05Plate-Lifting1
12***34Angle (L.H.)1
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142-0786 Frame & Mtg Gp-Pipelayer
10***00Door1
10***47Shaft; (To Sheave Assembly And P/L Frame)1
10***05Shaft; (To Sheave As. And P/L Frame)1
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111-0816 Grid Gp-Sand Blast Eroding
11***16Grid Group-Sand Blast Eroding1
7C***63Grid Assem.1
7X***29Washer; (11x25x3-mm Thk)8
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110-9739 Grill Gp-Radiator
10***62Grill Assem.1
11***39Grill Group-Radiator1
8T***93Bolt-Plt; (M16 X 2.0 X 50)2
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145-4348 Guard Gp-Bottom
09***65Spacer; (17x40x3-mm Thk)18
11***12Guard Assem.1
14***44Guard As1
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107-7263 Guard Gp-Bottom
09***65Spacer; (17x40x3-mm Thk)12
10***63Guard Group-Bottom1
11***08Guard Assem.1
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107-7265 Guard Gp-Fuel Tank
10***65Guard Group-Fuel Tank1
13***59Film-Stripe1
13***04Guard Assem.1
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143-2179 Guard Gp-Lines
14***79Guard Group-Lines1
14***72Guard As-Winch1
14***90Plate As1
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145-4349 Guard Gp-Radiator
09***85Locknut; (M16x2-Thd)2
10***63Hinge2
10***70Grill Assem.1
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107-7240 Hood & Guard Gp
0S***75Pin-To Arm Assembly And Retainer1
10***40Hood & Guard Group1
11***43Plate2
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193-7610 Ladder Gp
19***79Handrail As1
19***85Bracket As1
19***86Support-Step; (Rubber)2
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7c-5034 Plate Gp-Sound Suppression
11***48Plate-Sound Suppression1
6V***22Bolt (M10x1.50x35mm)10
6V***40Bolt (M8x1.25x25mm); (M8x1.25x25-mm)2
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143-2182 Step Gp
14***82Step Group1
14***87Tube As1
14***36Plate-Tread1
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146-3789 Suppression Ar-Sound
10***66Enclosure Group-Engine1
10***89Radiator Group1
11***09Engine Ar1
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107-7291 Suppression Ar-Sound
10***91Suppression Ar-Sound1
10***66Enclosure Group-Engine1
10***89Radiator Group1
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128-6578 Suppression Gp-Sound
12***78Suppression Group-Sound1
12***88Liner4
12***90Liner1
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Fuel System
129-1102 Base Gp-Fuel Filter
11***23Insert-Fuel Filter1
12***01Valve Group-Check; -Fuel-Fuel Filter1
12***02Base Group-Fuel Filter1
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105-1695 Control Gp-Fuel Injection
10***95Control Group-Fuel Injection1
16***56Control Group-Fuel Injection1
6V***83Bolt (16mm Long); (M6x1x16-mm)4
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114-4505 Control Gp-Governor
11***05Control Group-Governor1
11***06Lever Assem.1
5C***53Bolt (M6x1.00x16mm); (M6x1x16mm Thk)1
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7e-8794 Drive Gp-Gov & Transfer Pump
10***85Lever-Shutoff; (Output)1
1W***65Ring-Retaining1
3J***07Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve2
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7w-4812 Fastener Gp-Fuel Inj Pump
1T***68Seal-O-Ring; (Fuel Injection Pump)1
6F***73Seal--To Top Cover On Selector Valve1
6V***18Bolt (M8x1.25x45mm); (M8x1.25x35-mm)3
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133-3062 Governor Gp-Unit Injector
10***90Spring-Air Side1
10***92Spring-Servo1
10***93Spring-Return1
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115-2546 Governor Gp-Unit Injector
10***91Spring-Oil Side1
10***72Cam Assem.1
11***46Governor Group-Unit Injector; (Unit Injector)1
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113-6221 Governor Gp-Unit Injector
11***21Governor Group-Unit Injector; (Unit Injector)1
11***46Governor Group-Unit Injector; (Unit Injector)1
13***16Lines Group-Governor Oil1
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107-7241 Lines Gp-Fuel
10***41Lines Group-Fuel1
14***52Bracket1
14***62Separator Group-Water1
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135-1717 Lines Gp-Fuel Filter
00***64End; (Hose)2
11***78Clip2
12***72Tee1
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107-7731 Lines Gp-Fuel Ratio Control
10***80Tube Assem.1
10***31Lines Group-Fuel Ratio Control; Air Fuel Ratio Control Lines Group, Angle1
3J***54Packing,Preformed Part Of Kit P/N 5r***271
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135-1716 Lines Gp-Governor Oil
13***16Lines Group-Governor Oil1
13***57Tube Assem.1
3J***07Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve1
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107-7732 Pump Gp-Fuel Injection
10***32Pump Group-Fuel Injection1
11***18Seal-O-Ring; (26.64mm Id)1
12***74Seal-O-Ring; (7.59mm'Id)1
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126-5035 Pump Gp-Fuel Priming
12***35Pump Group-Fuel Priming1
1H***71Seal 20.22 mm(.796 In.)I. D.1
1P***36Gasket; (Fuel Priming Pump)(Fuel Priming Pump)1
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183-2824 Pump Gp-Fuel Priming -Manual
06***39Seal-O-Ring1
18***23Pump As-Fuel Priming1
18***24Pump Group-Fuel Priming; -Manual1
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145-8862 Separator Gp-Water
11***01Bowl As-Water Collection1
11***89Element-Water Separator; (Water/Fuel Seperator)1
11***61Base Assem.1
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118-1467 Separator Gp-Water
11***89Element-Water Separator; (Water/Fuel Seperator)1
11***61Base Assem.1
11***67Separator Group-Water; -Primary1
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107-7243 Tank Gp-Fuel
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***43Tank Group-Fuel1
13***81Grab Handle1
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129-1101 Valve Gp-Check
03***33Seal-O-Ring; (12.42mm Id)1
12***01Valve Group-Check; -Fuel-Fuel Filter1
6V***23Ring; (Backup) (13.16mm Id)1
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115-0840 Valve Gp-Pressure Control
10***32Guide1
10***33Spool1
10***35Spring1
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Hydraulic System
3g-7655 Cartridge Gp-Vane Pump
06***10Pin Fastener, Rotor-Pump, . Pin1
06***11. Pin, Kit-Vane; (Vane Pump)(Implement, Steering)1
3G***92Retainer (Seal)4
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3g-2720 Cartridge Gp-Vane Pump -Rear
05***72Pin2
05***73Screw2
06***40Seal-O-Ring (Id=37.69mm)1
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143-4892 Cooler Gp-Hydraulic Oil
10***61Cooler Assembly1
14***92Cooler Group-Hydraulic Oil1
4B***73Washer 34.93 mm(1.375 In.) O.D.4
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143-4898 Cylinder & Mounting Gp
10***70Cylinder Group; (To Pipelayer Frame/Counterweight Frame)1
10***71Pin; (Rod End)1
10***72Pin; (Head End)1
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108-4870 Cylinder Gp-Hydraulic
10***17Valve Group-Counterbalance; -Hood Tilt Cylinder1
10***70Cylinder Group; (To Pipelayer Frame/Counterweight Frame)1
10***49Rod Assembly-Piston1
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142-4129 Hydraulic Ar
14***29Hydraulic Ar1
14***92Cooler Group-Hydraulic Oil1
14***94Lines Group-Pump1
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143-4900 Lines Gp-Boom
10***79Valve Group-Control; -Boom Stop1
10***90Bracket1
14***00Lines Group-Boom1
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143-4897 Lines Gp-Counterweight
14***97Lines Group-Counterweight1
14***06Hose As1
14***48Hose As2
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143-4895 Lines Gp-Hydraulic
0L***51Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold4
0S***87Bolt-Bracket Assembly To Timing Gear12
0S***88Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter2
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145-4525 Lines Gp-Hydraulic Oil Cooler
14***97Hose As1
14***20Hose As1
14***21Hose As1
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143-4901 Lines Gp-Pilot
0L***51Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold3
10***29Clamp2
10***53Cover1
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143-4894 Lines Gp-Pump
03***57Washer; (13x26x6-mm Thk)1
10***67Valve Group-Control; -Counterweight1
10***31Bracket As1
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143-4913 Pump & Mtg Gp-Implement
10***98Pump Group-Vane Basic1
14***13Pump & Mtg Group-Implement1
1H***27Seal 10.1 cm(3.984 In.) I.D.1
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106-6598 Pump Gp-Vane
0T***19Bolt Hose Assembly At4
10***97Shaft-Pump1
10***98Pump Group-Vane Basic1
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145-3197 Tank & Filter Gp-Hydraulic
12***45Screen As; (Steering Tank)1
14***97Tank & Filter Group-Hydraulic1
14***98Tank As1
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106-8279 Valve Gp-Control -Boom Stop
09***33Bolt-Socket Head; (M5x0.8x20-mm)2
10***79Valve Group-Control; -Boom Stop1
10***93Pin1
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115-1046 Valve Gp-Control
10***54Bushing4
10***55Bushing4
10***57Cap-End4
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106-8667 Valve Gp-Control -Counterweight
03***05Seal-O-Ring2
10***67Valve Group-Control; -Counterweight1
10***68Ring2
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105-8117 Valve Gp-Counterbalance
09***83Ring-Back Up1
10***17Valve Group-Counterbalance; -Hood Tilt Cylinder1
11***16Kit-Seal; (Counterbalance Valve)0
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112-8149 Valve Gp-Pilot
10***58Plate1
10***66Ring1
10***67Ring1
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114-4125 Valve Gp-Pilot
10***97Ring-Retaining4
10***98Washer2
10***99Washer2
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112-8148 Valve Gp-Control
11***48Valve Group-Spd Control; (Hook/Winch Speed)1
11***19Knob1
11***21Seal2
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Implements
142-8109 Stop Gp-Boom
10***90Bracket1
14***09Stop Group-Boom1
14***00Rod As1
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Lubrication System
131-4810 Breather Gp
13***10Breather Group; -Crankcase1
2W***62Breather As-Crankcase; (Engine)1
4L***64Seal Water Lines To Oil Cooler1
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135-0213 Filler Gp-Engine Oil
13***12Tube Assem.1
13***13Filler Group-Engine Oil1
5L***52Cap Assembly, Including:-; (Engine)1
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4p-8183 Filter Gp-Engine Oil
1R***07Filter As-Engine Oil; (Advanced Efficiency)1
23***54Gasket1
24***64Spring; (Yoke)2
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133-1842 Fumes Disposal Gp
13***42Fumes Disposal Group1
4D***88Clip-(Slot To Fit Fastener M10 Or 3/8)1
4P***55Hose-Disposal; (Fumes Disposal)1
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177-9112 Fumes Disposal Gp
17***11Hose1
17***12Fumes Disposal Group1
4D***88Clip-(Slot To Fit Fastener M10 Or 3/8)1
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143-3217 Fumes Disposal Gp
14***17Fumes Disposal Group1
4D***88Clip-(Slot To Fit Fastener M10 Or 3/8)1
4P***55Hose-Disposal; (Fumes Disposal)1
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108-8097 Gauge Gp-Oil Level (Dipstick)
10***97Gauge Group-Oil Level (Dipstick); (Dipstick)1
11***60Tube As-Oil Gauge1
12***65Gauge-Oil Level1
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4w-2914 Lines Gp-Engine Oil
3P***56Seal-O-Ring; (21.82mm Id)2
4W***32Elbow-Outlet1
4W***14Lines Group-Engine Oil1
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115-4143 Lines Gp-Engine Oil
11***73Tube As1
11***43Lines Group-Engine Oil1
3P***56Seal-O-Ring; (21.82mm Id)2
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1w-6030 Lines Gp-Turbocharger Oil
1S***57Gasket; (Turbocharger-Oil Supply)1
1W***30Lines Group-Turbocharger Oil1
3J***07Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve1
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4w-2195 Pump Gp-Engine Oil
11***24Pump Group-Engine Oil1
4W***95Pump Group-Engine Oil; Engine Oil Pump Group1
6V***15Bolt; (M10x1.5x75-mm)2
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200-4497 Pump Gp-Engine Oil
18***77Pump Group-Engine Oil1
20***97Pump Group-Engine Oil1
7W***37Shaft-Oil Pump1
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119-2924 Pump Gp-Engine Oil
10***05Spring1
11***24Pump Group-Engine Oil1
2W***77Body As-Oil Pump1
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Machine Arrangement
135-8791 Chassis Ar
10***30Seat Group-Suspension1
10***35Instrument Group; (Open R.O.P.S.)1
10***35Drawbar Group1
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135-7024 General Ar
13***24General Ar1
13***27General Ar-Tractor1
13***28Pipelayer Ar1
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135-7027 General Ar-Tractor
11***08Engine Ar1
11***11Installation Ar-Engine1
13***27General Ar-Tractor1
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135-7028 Pipelayer Ar
10***59Winch Arrangement1
10***67Block Group1
10***68Block Group1
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Operator Station
6w-8505 Adjuster Gp-Seat
01***89Bolt; (1/2-13x0.75-In)1
1B***82Spacer1
4V***50Plate-Slide Track1
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136-4991 Control Gp-Governor & Brake
00***06Ring-Retaining1
10***78Lever Assembly1
11***07Cover1
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135-7695 Control Gp-Steer Clutch & Brk
03***73Bolt; (3/8-16x1.5-In)2
09***78Bearing-Roller2
10***08Bolt (M10x1.5x35mm); (M10x1.5x35-mm)1
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107-3905 Control Gp-Transmission
10***05Control Group-Transmission1
11***18Plate1
11***01Cover Assem.1
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153-6429 Enclosure Gp-Cab
10***60Spring1
11***83Cover Assem.; (R.H.)1
11***88Cover Assem.; (L.H.)1
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8y-5959 Extension Gp-Backrest -Vinyl
8Y***77Pan As-Extension1
8Y***47Fastener2
8Y***59Extension Group-Backrest1
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108-4582 Housing Gp-Seat Suspension
09***78Pin-Spring1
10***24Kit-Indicator; (Weight Adjustment)(Suspension Seat)1
10***79Kit-Bumper; (Weight Adjustment)(Suspension Seat)1
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106-6435 Instrument Gp
10***03Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge)1
10***04Kit-Receptacle; (4-Pin)(Start Switch)1
10***35Instrument Group; (Open R.O.P.S.)1
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107-9098 Mounting Gp-Rops
10***98Mounting Group-Rops1
11***02Support Assem. (R. H.)1
11***04Support Assem. (L. H.)1
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108-8421 Pan Gp-Backrest
10***21Pan Group-Backrest; -Seat Back1
10***23Shaft As-Lumbar1
10***24Pan-Lumbar1
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8y-5992 Pan Gp-Seat
3K***97Pin 3.18 mm(.125 In.) Diameter4
6V***56Ring-Retaining2
8Y***92Pan As-Seat; (Bottom)1
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136-0044 Pedal Gp-Governor & Brake
09***15Washer-Hard; (20x35x1.6-mm Thk)1
11***77Lever1
11***78Bellcrank1
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145-0478 Platform Gp-Operator
10***04Lock As; (To Rh Console/For Counterweight Control)1
11***53Shroud Assem.1
11***22Guard1
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168-4418 Rops Gp
11***78Roll-Over Assem.1
16***83Washer; (22x35x10-mm Thk)2
16***18Rops Group1
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156-1148 Seat Belt Gp
15***48Seat Belt Group; -Retractable-Operator1
1A***50Bolt (7/16-20x1.75in); (7/16-20x1.75-In)1
1L***80Bolt; (7/16-20x1.5-In)1
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122-4617 Seat Belt Gp
12***17Seat Belt Group; -Retractable-Operator1
1A***50Bolt (7/16-20x1.75in); (7/16-20x1.75-In)1
4D***32Locknut (7/16-20 Thd)1
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8y-5976 Seat Gp -Vinyl, Lumbar
06***03Shim (.060mm Thk); (1.52-mm Thk)4
09***78Pin-Spring1
10***21Pan Group-Backrest; -Seat Back1
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6w-9744 Seat Gp-Suspension -Vinyl, Low Back
03***71Capscrew, Csk. Hd., 3/8in.-16 N.C. X 1in.2
10***65Pin1
2K***73Locknut Inside Guard Assembly6
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106-6430 Seat Gp-Suspension
10***30Seat Group-Suspension1
12***00Armrest Assem. (R. H.)1
6V***35Bolt-Self-Locking; (M10x1.5x40-mm)4
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106-6495 Seat Gp-Suspension
10***95Seat Group-Suspension1
12***00Armrest Assem. (R. H.)1
5V***62Bolt-Shoulder; (7/16-20x1.26-In)2
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8y-6179 Seat Gp-Suspension
10***82Suspension Group-Seat; -Contour-Shock Absorber1
12***17Seat Belt Group; -Retractable-Operator1
14***45Kit-Slider Block; (Suspension Seat)1
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6w-8502 Suspension Gp-Seat
02***24Locknut; (1/4-20-Thd)2
16***61Arm As1
17***21Clip23
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108-4082 Suspension Gp-Seat
10***03Fastener20
10***94Kit-Tether Belt; (Suspension Seat)(Seat Suspension)1
10***95Kit-Suspension Roller; (Suspension Seat)(Seat Suspension)1
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Power Train
110-3885 Control Gp-Transmission Hyd
03***33Washer; (0.516x1x0.12-In Thk)2
11***85Control Group-Transmission Hydraulic1
11***23Valve Group-Transmission Control1
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135-9983 Cover Gp-Transmission
13***83Cover Group-Transmission1
1P***85Cover1
8T***23Washer-Hard; (13.5x25.5x3-mm Thk)(Bolt To Shield)2
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114-3460 Final Drive Gp -Winch, Hook
09***68Plug, Tapered1
10***43Ring-Retaining1
10***39Housing-Final Drive1
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135-6152 Drive Gp-Final
09***70Bolt-Socket Hd; (M12 X 1.75 X 45)9
10***01Hub-Sprocket1
10***04Hub-Ring Gear1
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106-5790 Final Drive Gp -Winch, Boom-Winch
00***00Ring-Snap3
03***16Bearing As-Needle3
09***67Plug, Tapered1
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108-7925 Filter Gp-Oil
10***25Filter Group-Oil; -Power Train Oil1
10***27Housing-Transmission Filter1
13***75Filter Element As-Oil; (Ultra High Efficiency)(Cleanout/High Efficiency)1
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163-0164 Filter Gp-Oil
13***76Filter Element As-Oil; (Ultra High Efficiency)(Ultra High Efficiency)1
13***76Cover Assem.1
13***99Retainer1
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108-8844 Gear Gp-Bevel & Transfer
0S***09Bolt (3/4") Filler Tube Assembly To Transfer Drive Case1
0S***85Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine18
0S***87Bolt-Bracket Assembly To Timing Gear8
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107-7246 Lines Gp-Power Train Oil
10***46Lines Group-Power Train Oil1
10***30Valve Group-Priority1
10***48Pump Group-Gear1
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108-7039 Mounting Gp-Transmission
10***39Mounting Group-Transmission1
11***56Bracket Assem.1
11***57Bracket Assem.1
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108-8274 Planetary Gp-Transmission
03***60Ring-Retaining1
10***68Housing-Clutch1
10***69Housing-Support1
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135-7694 Power Train Ar
10***05Control Group-Transmission1
10***46Lines Group-Power Train Oil1
10***98Transmission Ar1
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109-2748 Pump Gp-Gear
10***48Pump Group-Gear1
13***09Pump Group-Gear1
3H***61Seal-O-Ring; (34.52mm Id)1
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133-3409 Pump Gp-Gear
10***17Body As-Oil Pump1
13***40Bearing-Sleeve2
13***67Bearing-Sleeve2
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7g-0841 Segment Gp-Sprocket
10***46Segment-Sprocket5
3S***82Bolt; (5/8-18x1.84-In)20
6V***16Washer-Hard; (18.25x35x3.5-mm Thk)20
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107-9099 Shaft Gp-Drive
10***99Shaft Group-Drive1
10***61Yoke Assem.1
10***65Universal Joint Group1
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135-6161 Shaft Gp-Steering Clutch Input
13***61Shaft Group-Steering Clutch Input1
13***62Shaft1
13***63Shaft1
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106-1709 Torque Converter Gp
10***98Gear-Pump Drive; (75-Teeth)2
10***09Torque Converter Group1
10***22Housing-Torque Converter1
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1t-1775 Torque Converter Gp
1J***72Ring-Retaining (99.9mm Od)1
1S***11Ring-Retaining1
1T***43Ball Bearing1
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107-7298 Transmission Ar
10***98Transmission Ar1
10***74Planetary Group-Transmission1
10***44Gear Group-Bevel & Transfer1
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108-4565 Universal Joint Gp
10***65Universal Joint Group1
10***70Tube-Universal Joint1
6V***43Bolt; (M10x1.5x45-mm)8
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108-3130 Valve Gp-Priority
09***07Nut; (M12x1.75-Thd)1
10***54Screw-Adjustment; (M12x1.75x18-mm)1
10***29Stop1
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6y-8473 Valve Gp-Relief
06***40Seal-O-Ring (Id=37.69mm)1
2S***82Spring1
2S***84Spool Assembly, Comprising:1
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111-2425 Valve Gp-Selector & Press Cont
11***25Valve Group-Selector & Press Cont1
11***28Spool-Ratio1
1J***53Pin-Spring2
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111-2423 Valve Gp-Transmission Control
11***23Valve Group-Transmission Control1
11***25Valve Group-Selector & Press Cont1
4B***03Bolt (4 In. Long)--101.6 mm)26
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Service Equipment And Supplies
143-8668 Film Gp
13***60Film-Caterpillar1
13***61Film-Stripe1
13***62Film-Stripe1
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142-5102 Plate & Film Gp
10***62Plate-Warning; (Secure Counterweight Frame)2
10***32Film-Instruction; (Counterweight)(Counterweight)1
10***54Film-Instruction; (Operator Controls, Load)(Pipelayer Controls)1
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Steering And Braking System
135-8613 Clutch & Brake Gp-Steering
10***41Disc-Friction6
10***44Disc-Friction4
10***97Bolt-Socket Head; (M12x1.75x50-mm)2
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135-0250 Valve Gp-Steering & Brake Cont
10***34Spool As-Brake; (Each Includes)2
10***35Spool As.2
13***50Valve Group-Steering & Brake Cont1
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Undercarriage
107-9157 Bar Gp-Equalizer
03***80Spacer; (9x16x36-mm)1
10***57Bar Group-Equalizer1
10***79Pin1
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107-9109 Cap Gp-Track Idler
10***09Cap Group-Track Idler1
10***36Block-Track Idler1
10***38Cap As-Track Idler1
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110-6122 Cap Gp-Track Idler
10***38Cap As-Track Idler1
11***22Cap Group-Track Idler; -Mounting1
11***24Block-Track Idler1
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228-8335 Frame As-Telescoping Recoil
21***17Frame As1
22***34Frame As1
22***35Frame As-Telescoping Recoil1
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107-7255 Frame Gp-Telescoping Recoil
10***55Frame Group-Telescoping Recoil1
10***37Track Adjuster & Recoil Group2
10***58Guard Assem.; (L.H.-Inner, R.H.-Outer)1
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198-9781 Frame Gp-Telescoping Recoil
10***37Track Adjuster & Recoil Group2
10***71Retainer Assem.4
19***81Frame Group-Telescoping Recoil1
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183-8461 Guard Gp-Track Guide
18***61Guard Group-Track Guide1
18***67Guard As2
20***65Spacer; (15-mm Thk)8
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205-6126 Guard Gp-Track Guide -Center Lgp
20***65Spacer; (15-mm Thk)8
20***26Guard Group-Track Guide; -Center Lgp1
20***55Guide Assem.; (Rear)2
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107-7271 Guard Gp-Track Guide
10***71Guard Group-Track Guide1
10***22Guard Assem.2
8G***58Spacer; (17x35x20-mm Thk)8
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107-7268 Guard Gp-Track Roller
10***68Guard Group-Track Roller1
10***16Plate2
10***17Plate2
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6t-2614 Idler Gp-Track
09***78Pin-Spring4
0S***94Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly12
1L***72Dowel (Part Of 8s***99 Assem.)4
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190-1551 Idler Gp-Track
05***94Bolt-12 Point Head; (3/8-16x1.75-In)12
13***18Washer-Thrust2
16***56Collar2
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108-0954 Link As-Track -Heavy-Duty
10***43Pin-Track44
10***44Bushing-Track44
10***47Link-Track; (Rotating Bushing Track, Rh)43
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124-3538 Mounting Gp-Carrier Roller
12***38Mounting Group-Carrier Roller1
3W***32Bracket Assem.2
8T***76Bolt-Plt; (M12 X 1.75 X 90)4
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107-7253 Pivot Bar Gp
10***53Pivot Bar Group1
10***74Shaft Assem.2
12***28Washer-Hard; (26x40x8-mm Thk)22
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6k-9880 Roller Gp-Track Carrier
0L***51Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold3
1H***96Packing,Preformed Cartridge Part Of Kit P/N 4j***801
1M***97Ring-Sealing2
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124-8240 Roller Gp-Track-Double Flange
12***40Roller Group-Track-Double Flange1
12***41Rim As-Double Flange1
12***48Bushing Assem.2
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125-4170 Roller Gp-Track-Double Flange
12***40Roller Group-Track-Double Flange1
12***70Roller Group-Track-Double Flange1
5P***47Washer (Bracket To Valve Support)4
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125-4169 Roller Gp-Track-Single Flange
12***37Roller Group-Track-Single Flange1
12***69Roller Group-Track-Single Flange1
5P***47Washer (Bracket To Valve Support)4
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124-8237 Roller Gp-Track-Single Flange
12***37Roller Group-Track-Single Flange1
12***38Rim As-Single Flange1
12***48Bushing Assem.2
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108-8137 Track Adjuster & Recoil Gp
10***37Track Adjuster & Recoil Group1
10***17Cylinder1
19***09Valve-Fill; (Grease)1
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108-2628 Track Gp -2 Required
10***54Link As-Track; -Heavy-Duty1
10***28Track Group; -2 Required1
1M***08Nut-Track160
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135-8271 Undercarriage Ar
10***53Pivot Bar Group1
10***57Bar Group-Equalizer1
10***28Track Group; -2 Required2
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124-3518 Undercarriage Gp
10***55Frame Group-Telescoping Recoil1
10***71Guard Group-Track Guide1
10***09Cap Group-Track Idler8
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198-9780 Undercarriage Gp
10***09Cap Group-Track Idler8
11***22Cap Group-Track Idler; -Mounting8
12***69Roller Group-Track-Single Flange8
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Work Tools
106-5768 Block Gp-Boom Sheave
10***68Block Group1
10***81Sheave Assembly; (To Shaft)1
10***48Block Group; (To Boom)1
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108-8848 Block Gp-Boom Sheave
10***72Pulley As; (Block)1
10***79Bushing1
10***10Pin Assembly1
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108-7845 Block Gp-Load Sheave -Upper
10***45Block Group; -Upper1
10***72Pulley As; (Block)2
10***73Plate-Center1
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106-5767 Block Gp-Load Sheave
10***67Block Group1
10***44Link; (To Boom)1
10***45Block Group; -Upper1
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108-7851 Block Gp-Load Sheave -Lower, Hook
10***51Block Group; -Lower, Hook1
10***72Pulley As; (Block)1
10***79Bushing1
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142-8291 Boom Gp
13***52Bushing2
13***39Boom As1
14***26Pin As2
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108-5852 Brake Gp-Winch
00***17Bearing As-Needle1
03***81Bearing As-Needle6
10***39Ring-Retaining1
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106-5770 Brake Gp-Winch
10***29Bearing As-Needle3
10***70Brake Group-Winch; -Boom1
10***71Hub-Planetary1
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143-4899 Lines Gp-Winch
10***32Manifold1
14***99Lines Group-Winch1
14***95Hose As1
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106-5805 Motor Gp-Gear
10***05Motor Group; -Boom1
10***06Motor Group; -Boom1
1H***23Packing,Preformed Part Of Kit P/N 5r***251
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106-5806 Motor Gp-Gear
05***23Dowel4
06***50Roller Bearing4
07***89Gasket2
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108-8561 Motor Gp-Gear
10***61Motor Group; -Hook1
10***62Motor Group; -Hook1
3B***08Lockwasher Handrails To Dash8
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108-8562 Motor Gp-Gear
05***23Dowel8
06***50Roller Bearing8
07***89Gasket4
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108-9675 Valve Gp-Relief
10***75Valve Group-Bearing Carrier; -Gear Motor, Hook1
11***20Plug1
11***26Spring1
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142-8106 Winch Ar-Load
14***06Winch Ar-Load1
14***37Winch Group-Hook1
1J***75Bolt,Machine Head Mtg4
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106-5759 Winch Ar-Pipelayer
10***59Winch Arrangement1
10***69Winch Group-Boom1
1D***27Bolt,Machine Head Mtg Uoc:Bsv,Bsx4
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106-5769 Winch Gp-Boom
10***69Winch Group-Boom1
10***70Brake Group-Winch; -Boom1
10***90Drive Group-Final; -Winch, Boom-Winch1
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145-0037 Winch Gp-Hook
12***32Winch Group-Hook1
14***37Winch Group-Hook1
14***38Valve Group-Combination; (Winch Hook)1
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128-3332 Winch Gp-Hook
10***52Brake Group; -Hook1
10***61Motor Group; -Hook1
11***60Drive Group; -Winch, Hook1
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Frequently asked questions

What engine does the Cat 561M pipelayer use?

The 561M is powered by the Caterpillar 3116, a four-stroke, six-cylinder turbocharged diesel of 6.6 liter displacement, mechanically governed with individual unit injectors and no engine ECM. Factory rating is 90 kW (121 hp) gross and 82 kW (110 hp) net at 2100 rpm.

What is the operating weight of the Cat 561M?

Factory operating weight is 16,240 kg (35,804 lb), with shipping weight around 15,318 kg (33,770 lb) before fuel, boom, pulley blocks and operator are added. Optional guards, heavy-duty batteries and track rollers add a modest amount on top of base weight, so actual weight varies slightly by configuration.

What replaced the Cat 561M pipelayer?

The Cat 561N replaced the 561M. It kept the same elevated-sprocket undercarriage, planetary powershift transmission and hydraulic drawworks layout but switched to an electronically controlled engine with more power and lower emissions.

What 561M owners discuss

How does the 561M steering clutch and brake system behave, and what causes sluggish or grabby steering response?
Each side runs an oil-cooled, hydraulically actuated multiple-disc clutch and brake, hydraulically released and spring-applied. The pack needs no manual adjustment and each side services as a unit. Sluggish or grabby response in the field usually traces to low or contaminated clutch/hydraulic oil, worn discs, or air trapped in the actuating circuit rather than a linkage fault. Check fluid level and condition and bleed the circuit before condemning the clutch pack. Have your dealer verify clutch pack wear and actuating pressure before any teardown.
What engine does the 561M run, and how does that change troubleshooting versus later 561 pipelayers?
The 561M carries the Cat 3116, mechanically governed, rated around 82 kW (110 hp) at 2100 rpm with turbocharging for low-to-mid range response. It is not electronically controlled - the onboard diagnostic connector on the M covers only starting and charging circuits, not engine fault codes. The follow-on 561N moved to an electronically controlled 3126B/C9-family engine rated near 92 kW (123 hp) with fingertip transmission controls. Moving from an M to an N means a different troubleshooting approach: mechanical fuel-system work on the M versus scan-tool diagnostics on the N.
What quirks show up on the 3116 that owners of this machine watch for?
Across the 3116 family, the most reported wear item is injector O-ring/seal leakage, which lets fuel or combustion gas bypass and shows up as hard starting, rough idle, or smoke on startup. Early oil cooler gaskets were a known leak point and were revised more than once at the factory. On a mechanically injected unit like the 561M, a no-smoke no-start points to a fuel supply or check-valve problem (losing prime after sitting); a start-then-die or smoky start points to injector seals. Have your dealer verify injector and oil-cooler-gasket condition before parts are replaced.
What undercarriage wear pattern is typical on this machine, and what should be inspected?
The 561M uses an elevated-sprocket undercarriage with single-grouser shoes around 510 mm (20 in) wide (shoe width and arrangement vary by how the machine was ordered). Because a sideboom carries a constant offset load from the boom and counterweight, wear is commonly reported as uneven side-to-side compared to a straight dozer, with track frames, sway bars and stabilizer bars on the boom side taking more contact wear. Inspect rail, roller, idler and sprocket wear as a percentage per component rather than eyeballing the track as a whole, check chain bushings, and look for loose or missing pad bolts and scarring from hard-surface contact.
What hydraulic and winch behavior is worth understanding on the 561M?
The winch draws power independent of the torque converter through its own powershift-style winch transmission, with multiple raise speeds and a single lower speed (gearing varies by configuration). Field complaints on sideboom winches in this class center on slow or jerky boom/winch response, which typically points to hydraulic oil condition, air in the circuit, or worn clutch/brake linings in the winch pack rather than a bad winch motor. Check wire rope, sheaves and boom pivot pins for wear or play at the same time, since the winch and boom share the same hydraulic supply. Have your dealer verify winch clutch and brake condition if response stays inconsistent after fluid service.
What electrical issues come up on the 561M, and how does that differ from newer machines in the family?
Because the 561M engine is mechanically governed, the electrical system is limited mostly to starting and charging - battery, alternator, starter, and wiring - and the built-in diagnostic connector is scoped to those circuits, not engine sensor fault codes. Reported problems on machines of this age are typical: corroded battery cables and grounds, worn starter solenoids, and charging faults after long idle periods or storage. There is no engine ECM to fault-code scan on the M the way there is on the 561N, so electrical troubleshooting here starts with checking connections and load-testing the charging system, not pulling codes.
What should a buyer check before purchasing a used 561M?
Inspect undercarriage wear by component percentage (rails, rollers, idlers, sprocket segments, pads), not just overall track appearance, and confirm shoe width, counterweight, and boom configuration match the spec sheet since these vary by how the unit was ordered. Walk the boom and pivot points for cracks, weld repairs, or cracked paint that signals fatigue, and check wire rope for fraying, kinks, or corrosion. Cycle the steering clutches and brakes through full engagement to feel for grabbiness or slip, and run the winch and boom hydraulics watching for slow or jerky motion. Check the engine compartment for oil or coolant staining consistent with the 3116's known injector-seal and oil-cooler-gasket wear points. Because configurations vary (standard versus low-ground-pressure undercarriage, fixed versus extendable counterweight) and this class of machine sees hard, dirty pipeline duty, have your dealer verify hour-based wear and configuration against serial number records before finalizing a purchase.

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

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