Caterpillar 660B
Caterpillarwheel tractor-scraperwheel tractor

Caterpillar 660B

Maintenance schedule, common problems & OEM parts breakdown

The Caterpillar 660B is a rigid three-axle, single-engine, pusher-loaded wheel tractor-scraper built for high-volume earthmoving, not a self-loading push-pull machine. The base 660 (90F/77F-prefix) opened the line with a naturally aspirated Cat D346 V8 rated roughly 450-500 flywheel hp through a 9-speed powershift transmission. The 660B (58K-prefix), introduced in 1969, replaced that engine with a turbocharged D346TA V8 rated around 550 flywheel hp paired with a newly developed 8-speed semi-automatic powershift. Operating weight runs roughly 52-58 t (115,000-128,000 lb) empty and 106-122 t loaded with a heaped bowl, moving up to 41.3 m³ (54 yd³) heaped and 30.6 m³ (40 yd³) struck. Cat offered the tractor with an open ROPS canopy or a cabbed option, gasoline pony-motor or electric starting, optional hydraulic Traction Aid weight transfer, and custom mine-spec bowls with stretched capacity and lengthened ejector strokes alongside the standard configuration.

The 660B's turbo and new transmission trimmed loaded weight versus the base 660 while adding horsepower, and Cat moved the bowl-lift cylinders from the gooseneck to an outboard position near the draft-tube ends to keep the bowl from racking under the added power. Caterpillar dropped all its large three-axle scrapers, this one included, from production around 1975, leaving the twin-engine push-pull 657 as its only remaining large motor scraper; no direct single-engine successor to the 660B nameplate followed. The machine remains active today mainly because it is mechanically simple, with no electronic controls to fail, and rugged enough for decades of heavy cut work; used-market interest centers on machines with an intact chassis and driveline, and many working examples now run a Detroit Diesel Series 60 in place of the original D346TA as factory turbo-engine parts support has thinned and regional emissions rules push out the original diesel.

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 660B specifications

Engine

Engine modelCat D346 V8 diesel, naturally aspirated (early 660, 90F/77F-series tractors); Cat D346TA V8 diesel, turbocharged (660B, 58K-series tractors)
Gross power660B (D346TA): 550 hp (410 kW) flywheel. Early 660 (D346, naturally aspirated): 450-500 hp (336-373 kW), depending on series.
Displacement19.5 L (1191 cu in)
Cylinders8, V-configuration
Emissions tierNot applicable. Machine predates emissions-tier regulation, built in the late 1960s-1970s.

Weights

Operating weight (empty)Approx. 52-58 t (115,000-128,000 lb) empty, depending on source and configuration.
Gross weight (loaded, heaped bowl)Approx. 106-122 t loaded. Early 660 trends toward the upper end (~120 t); 660B trends slightly lower (~117 t). Ton basis (short vs metric) is not consistent across published figures, treat as approximate.
Shipping weight breakdown, transport-disassembled (660B)Front tractor wheels approx. 9.1 t (20,000 lb); rear tractor wheels approx. 22.4 t (49,300 lb); scraper wheels approx. 18.6 t (41,000 lb); combined approx. 50 t (110,300 lb), per the factory parts book for the 50K1-and-up serial range.
Ground pressureNot published in available spec sheets for this model.

Dimensions

Transport length17.27 m (56 ft 8 in)
Transport widthApprox. 4.3 m (14 ft), reported as low as 4.24 m (13 ft 11 in) depending on source
Transport height4.37 m (14 ft 4 in)
Bowl cutting width3.65 m (12 ft)
TiresTractor unit: 18.00x25 20PR front, 37.5x39 28PR rear. Scraper unit: 37.5x51 36PR.
Wheelbase / tread / ground clearanceNot documented in publicly available spec sheets for this legacy model. Verify against the factory service manual for the applicable serial range.

Performance

Travel speed (660B)Up to approx. 72 km/h (45 mph)
Travel speed (early 660)Up to approx. 68 km/h (42 mph)
Transmission660B: 8-speed semi-automatic powershift. Early 660: 9-speed powershift.
Bowl capacity30.6 m³ struck (40 yd³); 41.3 m³ heaped (54 yd³)
GradeabilityNot published in available spec sheets for this model.

Service capacities (summary)

Fuel tank, hydraulic system, engine oil, cooling systemNot published in the spec sheets and parts-book excerpts available for this legacy model. Confirm exact fuel, hydraulic, engine oil, and cooling system capacities against the factory service manual for the applicable serial range.

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

660B fluids & capacities

SystemCapacityRecommended fluid
Engine crankcase (D346TA V-8 diesel, with filter)Not confirmed specifically for the 660B's uprated, turbocharged engine. A factory-reproduction data sheet for the predecessor/base 660 tractor unit (naturally aspirated engine, 500 flywheel hp, 9-speed powershift) lists crankcase capacity at 57 L (15 US gal). That figure is single-sourced, tied to the earlier non-turbo tractor, and not confirmed to carry over unchanged to the 660B — treat as reference only and verify against the 660B-specific manual.Not documented by brand name in any accessible source for this era. Factory literature of this vintage specified engine oil by SAE viscosity grade for ambient temperature rather than a branded product line; no specific grade or brand could be confirmed as tied to the 660B.
Cooling systemNot confirmed for the 660B. The predecessor base-660 data sheet lists cooling system capacity at 144 L (38 US gal). Single source, tied to the earlier naturally aspirated tractor — the 660B's turbocharged, aftercooled engine may require a different volume, so this is reference only, not a verified 660B figure.Not documented by name for this model. No period antifreeze/coolant specification tied to the 660B was located in accessible sources; use a period-correct permanent-type coolant and confirm against the OMM.
Fuel tank738 L (195 US gal) is documented on the predecessor base-660 tractor's factory data sheet. The 660B shares the same three-axle tractor-scraper chassis as the base 660 per multiple independent sources, so the tank likely carries over unchanged, but this exact figure has not been independently confirmed for the 660B nameplate — treat as probable, not verified.No. 2 diesel fuel, consistent with period Caterpillar engine literature for this engine family (minimum cetane rating in the mid-30s); premium fuel is not required. Exact 660B-specific wording not located.
Power-shift transmission compartmentNot confirmed for the 660B. The predecessor base-660 (9-speed powershift, three automatically selected ranges) lists a transmission compartment capacity of 125 L (33 US gal). The 660B uses a distinct 8-speed semi-automatic powershift design, so this capacity may not carry over unchanged — varies by configuration/series. No 660B-specific figure was found in any accessible source.Not documented by brand for this era. Period Caterpillar literature for powershift and final-drive compartments generally called for a multipurpose-type gear lubricant selected by SAE viscosity grade rather than a named product; no confirmed grade or brand ties to the 660B specifically.
DifferentialNot confirmed for the 660B. The predecessor base-660 data sheet lists differential capacity at 155 L (41 US gal) as its own line item, separate from the transmission and final drives. Reference only, not independently confirmed for the 660B.Not documented by name. Likely the same multipurpose-type gear lubricant category noted for the transmission and final drives per period practice; no brand confirmed specifically for the 660B.
Final drives (each side)Not confirmed for the 660B. The predecessor base-660 data sheet lists final drive capacity at 26 L (7 US gal) per side, for its planetary, full-floating-axle final drive assemblies serviced independently on each side. Reference only.Not documented by name. Same multipurpose-type gear lubricant category as the transmission and differential per period practice; no confirmed brand tied to the 660B.
Hydraulic system and tank (steering and scraper circuit)Not confirmed for the 660B. The predecessor base-660 data sheet lists total hydraulic system (steering and scraper) capacity at 348 L (92 US gal), fed by a vane-type pump rated near 549 L/min (145 gpm) at 2000 rpm with a relief setting near 141 kg/cm2 (2000 psi). The bowl/apron/ejector cylinder sizing behind that figure matches the 41.3 m3 (54 cu yd) heaped bowl also cited for the 660B elsewhere, so the hydraulic circuit is probably shared, but the tank capacity itself is not independently confirmed for the 660B nameplate.Not documented by name. Period practice selected hydraulic oil by SAE viscosity grade for ambient temperature; no specific brand or spec confirmed for the 660B.
Retarder system (auxiliary hydraulic circuit)Not confirmed for the 660B. The predecessor base-660 data sheet lists a separate retarder-system capacity of 26 L (7 US gal), apart from the main steering/scraper hydraulic circuit. Reference only, standard equipment on this tractor line.Not documented by name. Presumed to share the main hydraulic system's oil type per typical period practice; not independently confirmed for the 660B.
Grease (chassis and pin joints, spec only)Not applicable. Grease points on this machine are serviced individually through fittings rather than a bulk-fill reservoir.Not documented by brand for this era or model in any accessible source. General-purpose chassis grease of the period was typically a lithium-base NLGI 2 product; no 660B-specific designation was located.

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

Caterpillar 660B maintenance schedule

Service intervalTasks
Every 50 h
  • Check engine oil level and coolant level before starting the shift.
  • Check operation of the downshift-indicator lamp and all instrument-panel warning lamps before starting; do not run the machine with either disabled, given the D346TA's known cam-follower risk on missed downshifts.
  • Drain water and sediment from the fuel tank sump.
  • Inspect tractor and scraper tires for cuts, embedded material, and correct inflation given the tonnage they carry.
  • Grease the gooseneck, draft frame, and bowl/apron/ejector linkage pins per the lubrication chart.
  • Cycle and inspect Traction Aid hoses and pins on equipped machines.
Every 250 h
  • Change engine oil and filter on the D346TA.
  • Check powershift transmission fluid level and condition; confirm the correct fluid grade is in the sump, since the wrong fluid shows up as clutch slippage.
  • Lubricate all chassis grease fittings per the full lubrication chart, including gooseneck and bowl-lift-cylinder pivots.
  • Inspect turbocharger mounting, boost lines, and oil supply/return lines for leaks or damage.
  • Check differential and final-drive oil levels on both sides.
  • Service or replace the engine air filter element, more often in dusty cuts.
Every 500 h
  • Change the powershift transmission fluid and filter.
  • Change differential and final-drive oil on both sides.
  • Check valve lash and cam-follower condition on the D346TA.
  • Sample hydraulic oil from the bowl/apron/ejector circuit for contamination.
  • Inspect bowl-lift-cylinder rod seals and mounting for leakage or cracking.
Every 1,000 h
  • Change hydraulic system oil and filters across the steering and bowl/apron/ejector circuits.
  • Inspect the turbocharger for shaft play and oil contamination; service before returning the machine to full-load work.
  • Inspect the chassis, gooseneck, and bowl-lift-cylinder mounts for fatigue cracking.
  • Re-torque wheel rim and final-drive fasteners given the tire and rim loads carried.
  • Check powershift clutch-pack condition and shift timing through the full range.
Every 2,000 h
  • Inspect or overhaul the powershift transmission's clutch packs.
  • Pull and inspect the turbocharger fully; rebuild rather than patch given the contamination risk to the engine's bottom end.
  • Carry out a full chassis structural inspection, frame, draft frame, and axle mounts, especially on high-hour or ex-mining units.
  • Inspect D346TA top-end and valve-train wear tied to the cam-follower failure history.
  • Fully inspect Traction Aid valves, cylinders, and hoses on equipped machines.
Every 6,000 h
  • Plan a full D346TA engine overhaul, top end and bottom end, around the cam-follower and turbo wear history rather than waiting for failure.
  • Rebuild the 8-speed powershift transmission completely, including all clutch packs.
  • Rebuild the bowl/apron/ejector structure and re-verify lift-cylinder mounting, especially on machines with any racking history.
  • Repair or replace fatigued chassis/frame sections on high-hour units before returning to mining-duty cycles.
  • Evaluate repower to a Detroit Diesel Series 60 where factory D346TA parts support has lapsed.

Servicing the 660B beyond the schedule

Predictive maintenance & fluid analysis

The 660B carries no ECM and no scan-tool diagnostics, so oil sampling is the only early warning on the D346TA turbo diesel. Pull engine oil samples on schedule and watch for turbocharger contamination markers after any turbo event. Sample powershift transmission fluid separately; running the wrong fluid grade shows up as clutch-pack slippage that mimics wear. Sample differential and final-drive gear oil for metal content given the tonnage these components carry. Track hydraulic oil condition on the bowl and ejector circuit; contamination there drives cylinder seal wear under load.

Corrective & common repairs

The recurring corrective job on this platform is cam-follower failure in the D346TA's valve train, usually traced to an operator missing the downshift-indicator lamp and forcing a wrong-range shift under load. After any turbocharger failure, flush the oil supply and return lines before running a replacement turbo, since leftover debris kills a good unit fast. Powershift slipping or delayed shifts often trace to incorrect transmission fluid rather than worn clutch packs; correct the fluid before condemning the pack. Inspect the gooseneck and bowl-lift-cylinder mounts for cracking on hard-worked machines.

Overhaul & rebuild points

Plan a D346TA top-end overhaul around cam-follower and valve-train wear rather than waiting for a failure in the cut. Turbocharger rebuilds on this engine should always include a full oil-line flush, not just a bolt-on replacement. The 8-speed semi-automatic powershift is a clean-sheet design from the base 660's transmission, so budget clutch-pack overhaul on its own schedule with no shared parts. On ex-mining or high-hour units, treat the chassis, gooseneck, and bowl-lift-cylinder mounting points as structural overhaul items, since fatigue cracking is the dominant failure mode at these weights.

Seasonal & environment servicing

Cycle the optional Traction Aid system before each shift in wet or freshly graded cuts and check its hoses and pins; even with weight shifted to the drive wheels, a loaded three-axle single-engine scraper can still lose footing on churned ground and need a push. In dry, dusty cuts, service engine air filtration more often to protect the D346TA turbo from abrasive intake. Check heater and cab seals on factory-cab units before cold-weather work. Inspect tractor and scraper tires for weather cracking on machines stored outdoors between seasons.

660B common service parts

Part numberPart
6H-6000Film-Warning Left Side Of Filter Opening On Seat FrameCheck fitment →

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660B attachments & work tools

Loading arrangement / pusher tractor

The 660/660B is pusher-loaded only. The rigid three-axle gooseneck carries no self-loading bail or push-pull hitch. Filling the bowl requires a tandem pusher tractor bumping the cushioned rear pushblock, originally a paired D9-class unit built for this duty and later large single dozers in this weight class.

Bowl, apron and ejector controls

Bowl, apron and ejector are hydraulically actuated, not cable-operated. On the 660B the bowl-lift cylinders are mounted outboard near the draft-tube ends rather than beside the gooseneck (the early-660 layout), a change made to keep the bowl square under heavy push loads.

Bowl cutting edge / ground-engaging tips

Cutting edge is offered in smooth or serrated patterns with abrasion-resistant tip options for rock or gravel duty. Edge choice is matched to the dig material rather than fixed at build.

Traction Aid hydraulic weight-transfer

Optional hydraulic Traction Aid (Tractionaid) system, offered across Caterpillar's three-axle scraper line of this era, shifts weight from the scraper axle onto the tractor drive wheels during the cut to improve traction in soft or loose material.

Tractor-to-bowl connection / pushblock

Tractor and bowl are joined by a fixed-pivot draft frame, not a quick-attach coupler. The rear pushblock is a cushioned steel-faced plate sized to mate with the pusher tractor's blade or push arms, and is the only 'attachment interface' this model uses.

Interchangeable haul bodies

The 660 tractor was also paired with third-party coal and earth bottom-dump bodies and a rock rear-dump body in place of the standard open bowl, letting the same tractor haul instead of scrape. These are aftermarket/dealer-supplied bodies rather than a Caterpillar-cataloged work tool, so fit and hydraulics should be verified case by case.

Tires and wheel equipment

Typical fitment is 18.00x25 20PR on the tractor front (steer) axle, 37.5x39 28PR on the tractor rear (drive) axle, and 37.5x51 36PR on the scraper axle. Dual rear tires and radial alternatives were offered depending on ground conditions; exact sizing varies by configuration/series.

Engine starting and fueling options

The D346-family diesel could be ordered with a gasoline pony-motor starting engine or a straight electric starter. A fast-fueling system was offered for high-utilization fleet operation.

Operator station

Standard operator station is an open ROPS canopy. A cab with heater was offered as a factory option for cold-weather work.

Series/engine configuration note

Early 660 (90F/77F series) used the naturally aspirated D346 V8, rated roughly 450-500 hp depending on series, with a 9-speed powershift. The 660B (58K series) moved to the turbocharged D346TA rated around 550 flywheel hp with a new 8-speed semi-automatic powershift. Confirm engine/transmission pairing against serial prefix before matching hydraulic or driveline options; horsepower and gearing vary by series.

All 660B assemblies by section

Every catalogued assembly group for the Caterpillar 660B. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Attachments
2p3154 Air Conditioner Arrangement--Field Installation
1P***22Air Conditioner Group1
1P***23Console Group-Control1
1P***24Return Air Console Group1
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1p3322 Air Conditioner Group--Part 3 Of 3
1p3322 Air Conditioner Group--Part 2 Of 3
1p3322 Air Conditioner Group--Part 1 Of 3
8d4940 Back-Up Warning Arrangement
8D***85Back-Up Warning Group1
8D***65Back-Up Warning Group1
8D***40Back-Up Warning Arrangement1
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8d4935 Back-Up Warning Arrangement
8D***85Back-Up Warning Group1
8D***60Back-Up Warning Group1
8D***35Back-Up Warning Arrangement1
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2g7025 Back-Up Warning Group
8d4785 Back-Up Warning Group--Factory Installation--Type 1
8d4785 Back-Up Warning Group--Type 2--Factory Installation
8d4865 Back-Up Warning Group--Factory Installation
8d4860 Back-Up Warning Group--Factory Installation
7d9375 Basic Alarm Group--24 Volt--Type 2
7d9375 Basic Alarm Group--24 Volt--Type 1
7d9420 Bevel Gear Group
7d4100 Brake Control Group--Trailing Unit
5d1160 Brake Group--Type 1
5d1160 Brake Group--Type 4
5d1160 Brake Group--Type 2
5d1160 Brake Group--Type 3
6d6365 Brake Shield Group
7d6355 Brake Shield Group
3g1270 Cartridge Group
3g2722 Cartridge Group--12 G.P.M.--L.H. Rotation
3g2717 Cartridge Group--5 G.P.M.--L.H. Rotation
3G***17Cartridge Group-Vane Pump; -Front1
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5j5272 Brake Chamber Assembly
7n4296 Clutch And Refrigerant Compressor Group
7N***96Compressor Group-Clutch & Refrig1
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2p8233 Refrigerant Compressor Group--Type 1
2p8233 Refrigerant Compressor Group--Type 2
3p2103 Condenser Service Door Group
1p3323 Control Console Group
1p3323 Control Console Group--Type 2
5j519 Control Valve Group
2s3025 Protection Cover Group--Oil Filler Cap
2S***25Cover Group-Protection; Protection Cover Group1
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5d1900 Protection Cover Group--Hydraulic Tank Cap
5D***00Cover Group-Protection; Protection Cover Group-- Hydraulic Tank Cap1
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2s6096 Protection Cover Group--Radiator Cap
2S***96Cover Group-Protection; Protection Cover Group-- Radiator Cap1
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9d630 Dust Cover Group
9f740 Discharger
6d22 Door Limiter Group
7d1730 Emergency Start Receptacle Group
7D***30Emergency Start Receptacle Group1
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7d3510 Ether Starting Aid Group
9s6716 Fan Assembly--Reversible Blade
7d1650 Final Drive And Dual Wheel Arrangement--21.00 X 49
0S***94Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly8
1B***31Nut-Rops Mounting Bracket To Fender Rear8
1D***08Bolt-(3/4" X 2-3/4")-Rops Mounting Bracket To Fender8
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7d6000 Fast Fill Fuel Adapter--Type 3
7d6000 Fast Fill Fuel Adapter--Type 2
7d6000 Fast Fill Fuel Adapter Group--Type 1
7d4690 Fuel Tank Adapter Group
9s5002 Governor Control Lever Service Group
9S***02Governor Control Lever Service Group1
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8f9866 Grease Gun
7d8780 High Speed Oil Change Group--Type 1
7d8780 High Speed Oil Change Group--Type 2
8d6614 Hose Assembly
3P***22Stem Assembly--90 Degrees (Long)1
4S***98Stem Assembly--90 Degrees (Short)1
4S***07Hose--48.80" Length (Order By The Inch)2
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8d5319 Hose Assembly
3S***06Sleeve Assem.2
7S***69Stem Assem. (.50" Thread)1
8D***19Hose As1
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4j2064 Hydraulic Cylinder Group--2 Required
3j2733 Hydraulic Oil Filter Group
7j614 Hydraulic Pump Assembly
7j596 Hydraulic Pump Assembly
2p5167 Jacket Water Heater Group
2p5167 Jacket Water Heater Group--Type 2
1m1882 Flood Lamp Assembly--24 Volt--Type 2
1m1882 Flood Lamp Assembly--24 Volt--Type 1
7d1180 Light Signal Receiver Group--24 Volt
8d7940 Mounting Group--Field Installation
8d7510 Mounting Group--Field Installation
2p3153 Mounting Modifications Group--Part 1 Of 3
2P***53Mounting Modifications Group; Air Conditioning Mounting Modifications Group1
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2p3153 Mounting Modifications Group--Part 2 Of 3
2P***53Mounting Modifications Group; Air Conditioning Mounting Modifications Group1
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2p3153 Mounting Modifications Group--Part 3 Of 3
2P***53Mounting Modifications Group; Air Conditioning Mounting Modifications Group1
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Name Plates And Transfers
1S***88Film-- Drain Valve; --On Each Side Of Radiator Support1
2D***80Plate; Serial Number On R.H. Side Of Cylinder Block1
2P***31Film--Cat On Each Side Of Radiator Guard; Film--Cat On Each Side--Above Drum Shaft1
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3p52 Oil Filter Group--Field Installation
7d4780 Parking Brake Control Arrangement--Factory Installation Only
7D***80Parking Brake Control Group1
7D***80Parking Brake Control Arrangement1
7J***08Key Sq.; 38,1 mm (1.5") Long, Parking Brake Control Group, Key Sq.; 1.50" Long - Was 7j***121
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7d4790 Parking Brake Control Arrangement--Factory Installation Only
7D***80Parking Brake Control Group1
7D***90Parking Brake Control Arrangement1
7J***10Parking Brake Control Group1
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7j5108 Parking Brake Control Group--Type 1
7J***08Key Sq.; 38,1 mm (1.5") Long, Parking Brake Control Group, Key Sq.; 1.50" Long - Was 7j***121
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7d4680 Parking Brake Control Group--Part 1 Of 2--Type 2
7d4680 Parking Brake Control Group--Part 2 Of 2--Type 2
7j5110 Parking Brake Control Group--Type 2
7j5108 Parking Brake Control Group--Type 2
7J***08Key Sq.; 38,1 mm (1.5") Long, Parking Brake Control Group, Key Sq.; 1.50" Long - Was 7j***121
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7d4680 Parking Brake Control Group--Part 2 Of 2--Type 1
7d4680 Parking Brake Control Group--Part 1 Of 2--Type 1
7j5110 Parking Brake Control Group--Type 1
5d1920 Protection Cover Group--Fuel Tank Cap
5D***20Protection Cover Group-Fuel Tank Cap; Protection Cover Group1
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7d7080 Pump, Tank And Lines Group--Part 2 Of 5--Type 2
7d7080 Pump, Tank And Lines Group--Part 5 Of 5--Type 2
7d7080 Pump, Tank And Lines Group--As Viewed From Rear Right Hand Side Of Machine--Part 5 Of 5
7d7080 Pump, Tank And Lines Group--Part 2 Of 5
7d7080 Pump, Tank And Lines Group--Part 3 Of 5
7d7080 Pump, Tank And Lines Group--Part 1 Of 5
7d7080 Pump, Tank And Lines Group--Part 1 Of 5--Type 2
7d7080 Pump, Tank And Lines Group--Part 3 Of 5--Type 2
7d7080 Pump, Tank And Lines Group--Part 4 Of 5--Type 2
7d7080 Pump, Tank And Lines Group--Part 4 Of 5
8n2469 Radiator Dampening Conversion Group--Field Installation
8N***69Radiator Dampening Conversion Group1
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2d284 Rear Flood Light Group--24 Volt
2p8713 Refrigerant Compressor Group--Type 3
2p8713 Refrigerant Compressor Group--Type 2
2p8713 Refrigerant Compressor Group--Type 1
4j2575 Relief Control Valve Group
2j9815 Relief Valve Group
1p3324 Return Air Console Group
8d8760 Roll-Over Protective System--Open--Type 1
9d670 Roll-Over Protective System--Open--Field Installation
8d8760 Roll-Over Protective System--Open--Type 2
5d3306 Rotochamber Assembly
7j6233 Rotochamber Assembly
6d6435 Brake Shield Group
7d6345 Brake Shield Group
4j5344 Single Lever Bowl And Apron Control Group
4J***44Single Lever Bowl And Apron Control Group1
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7j9342 Single Lever Bowl And Apron Control Group
7J***42Single Lever Bowl And Apron Control Group1
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6g2755 Slack Adjuster Group--R.H.
6g2754 Slack Adjuster Group--L.H.
8p5349 Switch Assembly--Thermostat--Type 1
8P***49Switch As; Switch Assembly--To Bracket Assembly1
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8p5349 Switch Assembly--Thermostat--Type 2
8P***49Switch As; Switch Assembly--To Bracket Assembly1
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4j5756 Tank And Valve Group--Part 2 Of 2
4j5756 Tank And Valve Group--Part 1 Of 2
9s7978 Tool Group
5d7060 Traction Control Unit And Cylinder Group--Part 2 Of 2--Type 1
5D***60Traction Control Unit And Cylinder Group1
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5d7060 Traction Control Unit And Cylinder Group--Part 1 Of 2--Type 1
5D***60Traction Control Unit And Cylinder Group1
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5d7060 Traction Control Unit And Cylinder Group--Part 2 Of 2--Type 2
5D***60Traction Control Unit And Cylinder Group1
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5d7060 Traction Control Unit And Cylinder Group--Part 1 Of 2--Type 2
5D***60Traction Control Unit And Cylinder Group1
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6d3782 Emergency Brake Control Valve Assembly
2r618 Double Check Valve Assembly
4j8500 Control Valve Assembly
2g9000 Fast Fill Adapter Group
4d2286 Valve Assembly
4d3278 Control Valve Assembly
4D***78Valve Group-Air Control; -Parking Brake Switch1
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7d4380 Vandalism Guard Group
8d4185 Vandalism Protection Arrangement
2S***25Cover Group-Protection; Protection Cover Group1
2S***96Cover Group-Protection; Protection Cover Group-- Radiator Cap1
5D***00Cover Group-Protection; Protection Cover Group-- Hydraulic Tank Cap1
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9j5045 Vane Pump Group--Type 1
9j5051 Vane Pump Group--Type 2
9j5051 Vane Pump Group--Type 1
9j5045 Vane Pump Group--Type 2
7d1630 Final Drive And Wheel Group--Type 4
7D***30Wheel & Final Drive Group; Final Drive And Wheel Group1
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7d1630 Final Drive And Wheel Group--Type 6
7D***30Wheel & Final Drive Group; Final Drive And Wheel Group1
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7d1630 Final Drive And Wheel Group--Type 3
7D***30Wheel & Final Drive Group; Final Drive And Wheel Group1
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7d1630 Final Drive And Wheel Group
7D***30Wheel & Final Drive Group; Final Drive And Wheel Group1
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7d1630 Final Drive And Wheel Group--Type 5
7D***30Wheel & Final Drive Group; Final Drive And Wheel Group1
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7d1630 Final Drive And Wheel Group--Type 2
7D***30Wheel & Final Drive Group; Final Drive And Wheel Group1
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5d6920 Windrow Breaker Group--Side View
Diesel Engine
Aftercooler (9s6748 N/S)
Air Cleaner (5d7750 N/S)
2s2764 Air Compressor Assembly
1p5013 Air Compressor Group--Type 2
2s3707 Air Compressor Group
1p5013 Air Compressor Group--Type 1
7m914 Air Filter Service Indicator Group
7M***14Air Filter Service Indicator Group1
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Air Lines (8s724 N/S)
5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 2 Of 2--Type 2
5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 1 Of 2--Type 1
5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 2 Of 2--Type 1
5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 1 Of 2--Type 2
7s8847 Alternator Group--24 Volt, 50 Ampere
7S***47Alternator Group-Charging; Alternator Group1
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Battery, Wiring And Lighting System (5d8040 N/S)--24 Volt--Part 3 Of 3
5D***40Battery Wiring And Lighting System1
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5d8040 Battery, Wiring And Lighting System--24 Volt--Part 2 Of 3
5D***40Battery Wiring And Lighting System1
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5d8040 Battery, Wiring And Lighting System--24 Volt--Part 3 Of 3
5D***40Battery Wiring And Lighting System1
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5d8040 Battery, Wiring And Lighting System--24 Volt--Part 1 Of 3
5D***40Battery Wiring And Lighting System1
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Battery, Wiring And Lighting System (5d8040 N/S)--24 Volt--Part 1 Of 3
5D***40Battery Wiring And Lighting System1
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Battery, Wiring And Lighting System (5d8040 N/S)--24 Volt--Part 2 Of 3
5D***40Battery Wiring And Lighting System1
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6n1674 Bearing And Rod Kit--Field Installation
4N***86Tube Assembly8
4N***00Bearing Connecting Rod8
4N***01Rod Assembly - Odd Cylinder; (Odd Cyl.)4
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Blower Fan And Guard (9s7182 N/S)
8s6180 Breather Group
8S***80Breather Group; Breather And Fumes Disposal Group1
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1p1183 Exhaust By-Pass Group
1P***83Bypass Group-Exhaust; Exhaust By-Pass Group1
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Camshaft (3s3982 N/S)--Part 1 Of 2
Camshaft (3s3982 N/S)--Part 2 Of 2
3s3982 Camshaft Group--Part 2 Of 2
3s3982 Camshaft Group--Part 1 Of 2
2s708 Connecting Rod And Piston Group--8 Required
2S***08Connecting Rod And Piston; Connecting Rod And Piston Group1
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2p8708 Fuel Ratio Control Group
2P***08Control Group-Fuel Ratio; Fuel Ratio Control Group1
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Fuel Ratio Control (8s6419 N/S)--With Override
8S***19Control Group-Fuel Ratio; Fuel Ratio Control Group (With Override)1
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2s3686 Crankshaft Group
2S***86Crankshaft Group; Crankshaft Group1
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Crankshaft (2s3686 N/S)
2S***86Crankshaft Group; Crankshaft Group1
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Crankshaft Replacement Bearings
7N***68Bearing--Main (.050 In. Undersize)5
7N***69Bearing--Main (.025 In. Undersize)5
7N***70Bearing--Main (.025 In. Oversize O.D.--Standard--I.D.)5
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Cylinder Block And Covers (2s3687 N/S)--Part 3 Of 3
2S***87Cylinder Block And Covers Group1
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2s3687 Cylinder Block And Covers Group--Rear View--Part 2 Of 3
2S***87Cylinder Block And Covers Group1
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Cylinder Block And Covers (2s3687 N/S)--Part 2 Of 3
2S***87Cylinder Block And Covers Group1
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2s3687 Cylinder Block And Covers Group--Part 3 Of 3
2S***87Cylinder Block And Covers Group1
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2s3687 Cylinder Block And Covers Group--Part 1 Of 3
2S***87Cylinder Block And Covers Group1
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Cylinder Block And Covers (2s3687 N/S)--Part 1 Of 3
2S***87Cylinder Block And Covers Group1
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2s3687 Cylinder Block And Covers Group--Front View--Part 1 Of 3
2S***87Cylinder Block And Covers Group1
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2s3687 Cylinder Block And Covers Group--Part 2 Of 3
2S***87Cylinder Block And Covers Group1
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2s3687 Cylinder Block And Covers Group--Side View--Part 3 Of 3
2S***87Cylinder Block And Covers Group1
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4n4086 Cylinder Block Assembly
8s6801 Cylinder Block Assembly--Type 1
8s6801 Cylinder Block Assembly
6n1557 Cylinder Block Assembly
8s6801 Cylinder Block Assembly--Type 2
8s6461 Cylinder Head And Valve Mechanism Group--Side View Part 1 Of 2
8s6461 Cylinder Head And Valve Mechanism Group--Side View--Part 2 Of 2
Cylinder Head And Valve Mechanism (8s6461 N/S)--End View Part 2 Of 2
8s6461 Cylinder Head And Valve Mechanism Group--End View--Part 2 Of 2
Cylinder Head And Valve Mechanism (8s6461 N/S)--Side View Part 1 Of 2
8s6461 Cylinder Head Valve Mechanism Group--End View--Part 1 Of 2
8s6461 Cylinder Head And Valve Mechanism Group--End View Part 2 Of 2
Drive Pulley And Damper (8s6403 N/S)
8s6403 Drive Pulley And Damper Group
5m1618 Dash Lamp Assembly--24 Volt
1p3162 Differential Pressure Regulator Assembly--Type 1--Replaced By
1P***62Differential Pressure Regulator Assembly1
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1p3162 Differential Pressure Regulator Assembly--Type 2--Replaced By
1P***62Differential Pressure Regulator Assembly1
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4n6680 Variable Timing Drive Assembly
2s4244 Air Compressor Drive Group--Type 2
2S***44Drive Group-Air Compressor; Air Compressor Drive Group1
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Air Compressor Drive (2s4244 N/S)--Type 1
2S***44Drive Group-Air Compressor; Air Compressor Drive Group1
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1m5061 Tachometer Drive Group
8s6418 Engine Oil Cooler Group
2s728 Engine Support Group
Exhaust By-Pass (2s3690 N/S)
8s6404 Fan Drive Group
8h7204 Primary Fuel Filter Group (9s1129 N/S)
4s8407 Fuel Filter Group
4S***07Filter Group-Fuel; Fuel Filter Group1
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2p5588 Oil Filter Group
2P***88Filter Group-Oil; Oil Filter Group1
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Oil Filter (2p5588 N/S)
2P***88Filter Group-Oil; Oil Filter Group1
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2s3261 Flywheel Group
8s206 Fuel Pump Housing Group--Part 2 Of 2
4n6714 Fuel Injection Pump Group--Part 1 Of 2
8s206 Fuel Pump Housing Group--Part 1 Of 2
4n6714 Fuel Injection Pump Group--Part 2 Of 2
1p2297 Fuel Priming Pump Group
6n9740 Fuel Priming Pump Barrel Assembly
6N***40Fuel Priming Pump Barrel Assembly1
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5d7520 Fuel System Group
Fuel System (5d7520 N/S)
8s199 Fuel Transfer Pump Group (5s9657 N/S)
8s199 Fuel Transfer Pump Group
5s9014 Fumes Disposal Group
Gasket Kits
1P***69Complete Diesel Engine Overhaul0
1P***70Valve Grinding0
1P***72Transmission Overhaul0
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Governor Control (5d6730 N/S)
8s6420 Governor Group--Part 1 Of 3--Type 3
8s6420 Governor Group--Part 2 Of 3--Type 3
8s6420 Governor Group--Part 3 Of 3--Type 3
8s6420 Governor Group--Part 3 Of 3--Type 2
4n3660 Governor Group--Part 2 Of 3--Type 1
8s6420 Governor Group--Part 2 Of 3--Type 4
8s6420 Governor Group--Part 3 Of 3--Type 4
4n3660 Governor Group--Part 1 Of 3--Type 1
4n3660 Governor Group--Part 3 Of 3--Type 2
2p8687 Governor Group--Part 1 Of 3--Type 2
8s6420 Governor Group--Part 1 Of 3--Type 2
8s6420 Governor Group--Part 3 Of 3--Type 1
2p8687 Governor Group--Part 3 Of 3--Type 2
2p8687 Governor Group--Part 1 Of 3
2p8687 Governor Group--Part 2 Of 3--Type 2
8s6420 Governor Group--Part 1 Of 3--Type 4
8s6420 Governor Group--Part 2 Of 3--Type 2
2p8687 Governor Group--Part 2 Of 3
2p8687 Governor Group--Part 3 Of 3
4n3660 Governor Group--Part 1 Of 3--Type 2
8s6420 Governor Group--Part 1 Of 3--Type 1
8s6420 Governor Group--Part 2 Of 3--Type 1
4n3660 Governor Group--Part 3 Of 3--Type 1
4n3660 Governor Group--Part 2 Of 3--Type 2
Governor Torque Spring (9s7000 N/S)--Type 2
Governor Torque Spring (9s7000 N/S)--Type 1
5d7989 Harness Assembly
Idler Gear (2s3701 N/S)--Rear View Part 1 Of 2
2S***01Idler Gear Group; Idler Gears-Balancer, Camshaft, Fuel Pump And Oil Pump Group1
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Idler Gear (2s3701 N/S)--Front View Part 2 Of 2
2S***01Idler Gear Group; Idler Gears-Balancer, Camshaft, Fuel Pump And Oil Pump Group1
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2s3701 Idler Gear Group--Front View Part 2 Of 2
2S***01Idler Gear Group; Idler Gears-Balancer, Camshaft, Fuel Pump And Oil Pump Group1
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2s3701 Idler Gear Group--Rear View Part 1 Of 2
2S***01Idler Gear Group; Idler Gears-Balancer, Camshaft, Fuel Pump And Oil Pump Group1
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1m3379 Head Lamp Assembly--24 Volt--Type 2
5s5147 Head Lamp Group--24 Volt--Type 2
5s5147 Head Lamp Group--24 Volt--Type 1
1m3379 Head Lamp Assembly--24 Volt--Type 1
9d4650 Rear Flood Lighting Group
2s3692 Fuel Injection Valves And Lines Group--Part 1 Of 2
2s3692 Fuel Injection Valves And Lines Group--Part 2 Of 2
Fuel Injection Valves And Lines (2s3692 N/S)--Part 1 Of 2
Fuel Injection Valves And Lines (2s3692 N/S)--Part 2 Of 2
Oil Lines (3s5520 N/S)--Part 2 Of 2
3S***20Lines Group-Oil; Oil Lines Group1
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3s5520 Oil Lines Group--Part 1 Of 3
3S***20Lines Group-Oil; Oil Lines Group1
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Oil Lines (3s5520 N/S)
3S***20Lines Group-Oil; Oil Lines Group1
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3s5520 Oil Lines Group--Part 1 Of 2
3S***20Lines Group-Oil; Oil Lines Group1
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3s5520 Oil Lines Group--Part 2 Of 2
3S***20Lines Group-Oil; Oil Lines Group1
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3s5520 Oil Lines Group--Part 2 Of 3
3S***20Lines Group-Oil; Oil Lines Group1
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Oil Lines (3s5520 N/S)--Part 1 Of 2
3S***20Lines Group-Oil; Oil Lines Group1
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3s5520 Oil Lines Group--Part 3 Of 3
3S***20Lines Group-Oil; Oil Lines Group1
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Manifolds (2s3695 N/S)--Side View Part 1 Of 2
2s3695 Manifold Group--End View Part 2 Of 2
2s3695 Manifold Group--Side View Part 1 Of 2
Manifolds (2s3695 N/S)--End View Part 2 Of 2
Muffler (9s8971 N/S)
9s8971 Muffler Group
5s1565 Oil Pump Assembly
3s8295 Oil Pump Group
4n8952 Connecting Rod And Piston Group--4 Required
4N***52Piston & Rod Group; Connecting Rod And Piston Group1
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2s3704 Glow Plug And Wiring Group
2S***04Plug & Wiring Group-Glow; Glow Plug And Wiring Group1
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9s5010 Pressure Ratio Regulator Assembly
9S***10Pressure Ratio Regulator Assembly1
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8s7705 Fuel Priming Pump Group
8S***05Pump Group-Fuel Priming; Fuel Priming Pump Group1
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6n5722 Oil Pump Group
6n5723 Oil Pump Group
6n6366 Water Pump Group
6N***66Pump Group-Water; Water Pump Group1
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Fuel Pump Housing, Drive And Governor (8s6460 N/S)
8S***60Pump-Drive & Governor Group; Fuel Injection Pump, Drive & Governor Group1
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8s6460 Fuel Pump Housing, Drive And Governor Group
8S***60Pump-Drive & Governor Group; Fuel Injection Pump, Drive & Governor Group1
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9s3764 Radiator Group--Side View Part 2 Of 2
Radiator (9s3764 N/S)--Rear View Part 1 Of 2
Radiator (9s3764 N/S)--Rear View--Part 1 Of 2
9s3764 Radiator Group--Side View--Part 2 Of 2
Radiator (9s3764 N/S)--Side View Part 2 Of 2
9s3764 Radiator Group--Rear View Part 1 Of 2
Radiator (9s3764 N/S)--Side View--Part 2 Of 2
Radiator Guard And Support (5d7460 N/S)
1p666 Regulator Group
4s7894 Service Meter And Tachometer Drive Group
4S***94Service Meter And Tachometer Drive Group1
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9s1265 Service Meter And Tachometer Drive Group
9S***65Service Meter And Tachometer Drive Group1
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1p1200 Service Meter Tachometer Drive Group
1P***00Service Meter And Tachometer Drive Group1
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4s7893 Service Meter Group
4n4358 Governor Torque Spring Group
4N***58Spring Group-Governor Torque; Governor Torque Spring Group1
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2s7227 Electric Starter Group--24 Volt
2S***27Starter Group-Electric; Electric Starter Group1
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5l5353 Electric Starting Motor Assembly--24 Volt--Part 2 Of 2
5l5353 Electric Starting Motor Assembly--24 Volt--Part 1 Of 2
5l3648 Motor Assembly--24 Volt, 50 Ampere--Part 2 Of 2--Type 1
5l3648 Electric Starting Motor Assembly--24 Volt--Part 2 Of 2--Type 2
5l3648 Motor Assembly--24 Volt, 50 Ampere--Part 1 Of 2--Type 1
5l3648 Electric Starting Motor Assembly--24 Volt--Part 1 Of 2--Type 2
4n3349 Electric Starting Motor Group--24 Volt--Part 1 Of 2
4n3349 Electric Starting Motor Group--24 Volt--Part 2 Of 2
2s9519 Rack Stop Group
7h7290 Disconnect Switch Assembly
6n5123 Solenoid Switch Assembly
4m1812 Solenoid Switch Assembly
4n3900 Coolant Flow Switch Group
4N***00Switch Group-Coolant Flow; Coolant Flow Switch Group1
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4n9600 Coolant Flow Switch Group
4N***00Switch Group-Coolant Flow; Coolant Flow Switch Group1
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9s6749 Transmission Oil Cooler Group
8s3681 Turbocharger Assembly (2s3699)
4s9498 Variable Timing Drive Assembly--Type 2
4s9498 Variable Timing Drive Assembly--Type 1
Water Lines (8s6416 N/S)--Rear View Part 2 Of 2
8s6416 Water Lines Group--Side View Part 1 Of 2
Water Lines (8s6416 N/S)--Side View Part 1 Of 2
8s6416 Water Lines Group--Rear View Part 2 Of 2
3s4730 Water Pump Group
Wiring Diagram--24 Volt System
Engine Arrangement
8s6451 Engine Arrangement
1P***83Bypass Group-Exhaust; Exhaust By-Pass Group1
2P***88Filter Group-Oil; Oil Filter Group1
2P***08Control Group-Fuel Ratio; Fuel Ratio Control Group1
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Transmission And Chassis
8s9121 Accumulator Group
5d7730 Rotochambers, Valves And Lines Group--Part 1 Of 2
Air And Brake Control (5d7730 N/S)
5d7730 Rotochambers, Valves And Lines Group--Part 2 Of 2
Air Tanks, Valves And Lines
9s2822 Automatic Selector Valve Group
Bowl And Apron Control (9d6785 N/S)
4j8027 Brake Group
Brake Oil Cooler (8s6413 N/S)
8s6413 Brake Oil Cooler Group
Brake Valve And Lines
5d3640 Brake Valve Assembly
5d7020 Bumper Group
3g7665 Cartridge Group--132 L/Min (35 Gpm)
3g2234 Cartridge Group--227 L/Min (60 Gpm)
3g2833 Cartridge Group--132 L/Min (35 Gpm)
3p272 Transmission Case And Covers Group
8d3468 Case And Frame Assembly
9j2058 Control Valve Group--Part 2 Of 2
6j660 Control Valve Group--Part 2 Of 2
6j660 Control Valve Group--Part 1 Of 2
9j2058 Control Valve Group--Part 1 Of 2
Differential And Bevel Gear (7d4030 N/S)--Part 2 Of 2
7d4030 Differential And Bevel Gear Group--Part 2 Of 2
7d4030 Differential And Bevel Gear Group--Part 1 Of 2
Differential And Bevel Gear (7d4030 N/S)--Part 1 Of 2
Differential Case And Covers (5d7200 N/S)--Rear Half Part 1 Of 2
Differential Case And Covers (5d7200 N/S)--Rear Half--Part 1 Of 2
Differential Case And Covers (5d7200 N/S)--Front Half Part 2 Of 2
6d8540 Differential Group
8d5620 Differential Group
8d5720 Differential Group--Field Installation
Drive Shaft (5d6780 N/S)
Drive Shaft Guard
7d3820 Emergency Brake Control Group--As Viewed From R.H. Side Of Machine--Part 2 Of 2
7d3820 Emergency Brake Control Group--As Viewed From R.H. Side Of Machine--Part 1 Of 2
Emergency Brake Control (7d3820 N/S)--Part 2 Of 2
Emergency Brake Control (7d3820 N/S)--Part 1 Of 2
Fenders
2s6457 Transmission Filter Group
2S***57Filter Group-Transmission; (Transmission)1
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Final Drive And Wheels (7d4700 N/S)--37.50 X 39 Tubeless Tires--Part 2 Of 2
7d4700 Final Drive And Wheels Group--37.50 X 39 Tubeless Tires--Part 2 Of 2
7d4700 Final Drive And Wheels Group--37.50 X 39 Tubeless Tires--Part 1 Of 2
7d4700 Final Drive And Wheel Group--37.50 X 39 Tubeless Tires--Part 2 Of 2
Final Drive And Wheels (7d4700 N/S)--37.50 X 39 Tubeless Tires--Part 1 Of 2
Final Drive And Wheel (7d4700 N/S)--37.50 X 39 Tubeless Tires--Part 1 Of 2
Front Axle And Wheels (5d6710 N/S)--18.00 X 25 Tubeless Tires--Top View--Part 1 Of 3
Front Axle And Wheels (5d6710 N/S)--18.00 X 25 Tubeless Tires--Front View--Part 3 Of 3
Front Axle And Wheels (5d6710 N/S)--18.00 X 25 Tubeless Tires--Top View--Part 2 Of 3
3d3334 Front Spring Group
5d7680 Gauge Group
Gauges (5d7680 N/S)
7s4597 Transfer Gear Group--Part 2 Of 2
7s4597 Transfer Gear Group--Part 1 Of 2
Transfer Gears (7s4597 N/S)--Part 2 Of 2
Transfer Gears (7s4597 N/S)--Part 1 Of 2
Governor And Drive (7s2970 N/S)
8s6340 Governor Group
5d2110 Hitch Group
Hood And Dash (5d7330 N/S)
5d6998 Air Horn Assembly
Horn, Horn Valve And Lines
2g16 Hour Meter Group
5j5427 Control Lever Housing Group
9j2026 Control Lever Housing Group
4d6738 Hydraulic Cylinder Group--4" Bore X 10" Stroke
5j3270 Hydraulic Oil Filter Group
6j9896 Hydraulic Pump Assembly
3d2063 Hydraulic Pump Assembly
Hydraulic Pump, Lines And Steering Gear (5d6740 N/S)--Part 1 Of 3
5D***40Hydraulic Pump, Lines And Steering Gear1
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Hydraulic Pump, Lines And Steering Gear (5d6740 N/S)--Part 3 Of 3
5D***40Hydraulic Pump, Lines And Steering Gear1
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Hydraulic Pump, Lines And Steering Gear (5d6740 N/S)--Part 2 Of 3
5D***40Hydraulic Pump, Lines And Steering Gear1
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7n8292 Fuse Holder, Fuse And Wire Kit--Field Installation
6d4205 Low Air Indicator Lamp Assembly
Manifold And Screens (2s6539 N/S)
2s6539 Manifold And Screen Group
6n9831 Oil Cooler Core Assembly
Planetary Transmission (7s8484 N/S)--Part 2 Of 4
7s8484 Planetary Transmission Group--Part 1 Of 4
7s8484 Planetary Transmission Group--Part 4 Of 4
7s8484 Planetary Transmission Group--Part 3 Of 4
Planetary Transmission (7s8484 N/S)--Part 1 Of 4
Planetary Transmission (7s8484 N/S)--Part 4 Of 4
7s8484 Planetary Transmission Group--Part 2 Of 4
Planetary Transmission (7s8484 N/S)--Part 3 Of 4
Platform (5d7600 N/S)--Part 1 Of 2
Platform (5d7600 N/S)--Part 2 Of 2
5d7600 Platform Group--Part 1 Of 2
5d7600 Platform Group--Part 2 Of 2
8s700 Powershift Transmission Arrangement
8S***00Powershift Transmission Arrangement1
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7s8665 Pressure Control Group
3p8529 Pressure Control Valve Group
2s7850 Scavenge Pump Group
2S***50Pump Group-Scavenge; -Flywheel Scavenge1
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7s6985 Scavenge Pump Group
7S***85Pump Group-Scavenge; -Transmission Scavenge1
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7s6980 Transmission Pump Group
7S***80Pump Group-Transmission; -Transmission1
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9j5044 Vane Pump Group
9J***44Pump Group-Vane; -Implement Oil1
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9j5044 Vane Pump Group--Type 1
9J***44Pump Group-Vane; -Implement Oil1
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9j5044 Vane Pump Group--Type 2
9J***44Pump Group-Vane; -Implement Oil1
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4f6941 Quick Release Valve Assembly
4j2555 Relief Valve Group
Retarder
9s6889 Retarder Control Group
3d2744 Rotochamber Assembly
Rotochambers, Valves And Lines
Rotochambers, Valves And Lines--Part 2 Of 2
Rotochambers, Valves And Lines--Part 1 Of 2
7d8710 Safety Tread Group
6j650 Scraper Control Valve Group--Part 2 Of 2
6j650 Scraper Control Valve Group--Part 1 Of 2
Scraper Pump, Lines And Tank (5d6930 N/S)--Part 5 Of 5
5d6930 Scraper Pump, Lines And Tank Group--Part 3 Of 5
Scraper Pump, Lines And Tank (5d6930 N/S)--Part 3 Of 5
Scraper Pump, Lines And Tank (5d6930 N/S)--Part 2 Of 5
5d6930 Scraper Pump, Lines And Tank Group--Part 5 Of 5
Scraper Pump, Lines And Tank (5d6930 N/S)--Part 1 Of 5
5d6930 Scraper Pump, Lines And Tank Group--Part 1 Of 5
5d6930 Scraper Pump, Lines And Tank Group--Part 4 Of 5
Scraper Pump, Lines And Tank (5d6930 N/S)--Part 4 Of 5
5d6930 Scraper Pump, Lines And Tank Group--Part 2 Of 5
Seat (5d6800 N/S)--Side View Part 1 Of 2
Seat (5d6800 N/S)--Front View Part 2 Of 2
5d6800 Seat Group--Front View Part 2 Of 2
5d6800 Seat Group--Side View Part 1 Of 2
2g535 Seat Group
2g6255 Seat Group
9d7019 Seat Group
6g150 Basic Seat Group
2g6470 Basic Seat Group
8d9925 Seat Group
7d2269 Seat Suspension Assembly
2g5400 Seat Suspension Group--Part 2 Of 2
2g2599 Seat Suspension Group--Part 1 Of 2
2g2599 Seat Suspension Group--Part 2 Of 2
2g8720 Seat Suspension Group--Part 2 Of 2
2g5400 Seat Suspension Group--Part 1 Of 2
2g6480 Seat Suspension Group--Part 1 Of 2
2g6480 Seat Suspension Group--Part 2 Of 2
2g8720 Seat Suspension Group--Part 1 Of 2
7s6937 Selector Valve Group
9s2824 Shift Pressure Control Group
5d9525 Slack Adjuster Assembly--R.H.
5D***25Slack Adjuster Assembly--R.H.,Slack Adjuster Assembly--L.H.1
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4d6590 Steering Gear Assembly
5d6790 Hydraulic Tank Group--Part 2 Of 2--Type 1
5d6790 Hydraulic Tank Group--Part 1 Of 2
5d6790 Hydraulic Tank Group--Part 2 Of 2--Type 2
5d6790 Hydraulic Tank Group--Part 1 Of 2--Type 2
5d6790 Hydraulic Tank Group--Part 1 Of 2--Type 1
5d6790 Hydraulic Tank Group--Part 2 Of 2
1t890 Torque Converter Group
6d9820 Transfer Gear Group--Side View Part 2 Of 2
6d9820 Transfer Gear Group--Rear View Part 1 Of 2
6d9820 Transfer Gear Group--Side View--Part 2 Of 2
Transmission And Retarder Lines (5d7870 N/S)--Part 1 Of 2
5D***70Transmission And Retarder Lines1
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Transmission And Retarder Lines (5d7870 N/S)--Part 2 Of 2
5D***70Transmission And Retarder Lines1
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Transmission Case And Covers (8s9002 N/S)
3p383 Transmission Case Assembly
Transmission Control (5d7220 N/S)--Part 2 Of 2
Transmission Control (5d7220 N/S)--Part 1 Of 2
Transmission Control Guard
Transmission Hydraulic Control (7s4503 N/S)--Part 2 Of 2
7S***03Transmission Hydraulic Control Group1
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7s4503 Transmission Hydraulic Control Group--Part 1 Of 2
7S***03Transmission Hydraulic Control Group1
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Transmission Hydraulic Control (7s4503 N/S)--Part 1 Of 2
7S***03Transmission Hydraulic Control Group1
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7s4503 Transmission Hydraulic Control Group--Part 2 Of 2
7S***03Transmission Hydraulic Control Group1
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6d3943 Brake Valve Assembly
6d1039 Valve Assembly
6D***39Valve As; -Exhaust Bypass-Exhaust Diverter1
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6d856 Valve Assembly
6D***56Valve As; -Differential Lock-Parking Brake1
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4d2287 Valve Assembly
4d487 Valve Assembly
4D***87Valve As-Check; -Air Supply-Primary Air Tank-Service Brake Control1
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7d2316 Control Valve Assembly
5d3056 Double Check Valve Assembly
5D***56Valve As-Double Check; -Brakesaver Air Supply1
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3d9943 Horn Valve
6d3546 Safety Valve Assembly
4d1669 Three Way Control Valve Assembly
2g8227 Safety Valve Group
2G***27Valve Group-Breaker Relief; -Hydraulic Tank1
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5d7880 By-Pass Valve Group
2r619 Double Check Valve Assembly
2R***19Valve Group-Check; -Air System-Parking Brake-Scraper Brake-Service Brake Control1
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9s2818 Governor Cut-Off Valve Group
6p3231 Pressure Control Valve Group
5d470 Quick Release Valve Group
5D***70Valve Group-Quick Release; -Parking Brake-Air1
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6j60 Valve Group
6J***60Valve Group-Relief; -Trailing Unit Main Control1
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9s9895 Relief Valve Group
2p5802 Retarder Control Valve Group
3p2973 Shift Pressure Valve Group
Valves And Lines
2g630 Vandalism Guard Group--Instrument Panel
3d8690 Windshield Group
6d9750 Windshield Wiper Group--24 Volt
9d4640 Windshield Wiper Group--24 Volt
9d4640 Windshield Wiper Group

660B serial number reference

The 660B's serial/ID plate is riveted to the tractor frame beside the differential housing, not on the scraper bowl or gooseneck, so check there first — plates on machines this old are often faded, painted over, or missing. The stamped serial is a short alphanumeric prefix (e.g. 58K) followed by a running unit number; the prefix identifies the production series/model spec while the trailing digits mark that unit's build sequence within it.

PrefixIdentifies
58K660B production series (introduced 1969)
18G (confirm with dealer)possible 660B start point continuing the base-660 number line

Frequently asked questions

What engine does the Caterpillar 660B use?

A turbocharged Cat D346TA V8 diesel rated around 550 flywheel hp (410 kW), paired with a newly developed 8-speed semi-automatic powershift transmission. This replaced the base 660's naturally aspirated D346 V8 (roughly 450-500 flywheel hp) and 9-speed powershift. There is no electronic engine control on this era of machine; fueling and governing are fully mechanical.

What is the operating weight of the Caterpillar 660B?

Roughly 52-58 t (115,000-128,000 lb) empty, rising to about 106-122 t loaded with a heaped bowl. The bowl itself carries 30.6 m³ (40 yd³) struck and 41.3 m³ (54 yd³) heaped. The 660B runs slightly lighter loaded than the base 660 despite its added horsepower.

What replaced the Caterpillar 660B?

Nothing directly. Caterpillar dropped all of its large three-axle scrapers, the 660B included, from production around 1975 and did not reintroduce a rigid three-axle, single-engine scraper of this size afterward. The 657, a twin-engine push-pull scraper, remained as Cat's large motor-scraper offering, but it is a different loading concept rather than a direct nameplate successor.

What 660B owners discuss

How does the 660B's turbocharged engine compare to the earlier naturally aspirated 660, and is it still running in original form today?
The 660B's turbocharged V8 is rated around 550 flywheel hp, well above the base 660's naturally aspirated version at roughly 450-500 hp depending on series, and the extra boost let Cat trim loaded weight versus the original 660 while still moving a bigger cut. In practice, most working 660Bs seen today aren't running that factory engine anymore: current emissions rules in some regions won't allow the original diesel family to operate, so owners commonly repower with a Detroit Diesel Series 60. Assume a running 660B in an active fleet has been repowered until you confirm otherwise.
Are there known engine failures tied to the transmission's downshift-indicator light on these machines?
Owners of this era of Cat scraper describe cam followers breaking out of the cylinder heads after operators shifted into the wrong power-train range under load. The usual trigger was a drowsy night-shift operator missing the downshift-indicator lamp and grabbing a lower range than the machine was ready for, shock-loading the valve train. Separately, a stumbling, smoking engine with no power right after a turbocharger failure is commonly traced to oil supply or return contamination left over from the failed turbo rather than a bad replacement unit. Because a mis-shift or a starved turbo bearing can cascade into a bottom-end failure, have your dealer verify range-shift timing and turbo oil supply lines before returning a repaired unit to full load work.
Does the optional hydraulic Traction Aid actually help in soft or wet conditions?
Operators describe it working as intended, hydraulically shifting weight onto the tractor's drive wheels and lightening the front axle to dig in when footing gets marginal. That said, even with Traction Aid engaged, a fully loaded three-axle single-engine scraper can still lose traction outright on wet or churned ground. One crew reported that if a water cart had recently crossed a haul ramp ahead of a loaded machine, it could not claw its way up on its own and needed a push from a grader or dozer. Treat Traction Aid as a traction improver, not a guarantee, once the ground turns greasy.
Why are the bowl lift cylinders mounted differently on the 660B than on the original 660?
Cat relocated the lift cylinders from an outboard position to a gooseneck-mounted arrangement on the B-series specifically to stop the bowl racking, or going out of square, once the extra horsepower from the turbocharged engine was applied under a full cut. It is a structural running change tied directly to the power increase rather than a routine parts update, so a B-series machine found with outboard-style lift cylinders or cracking around the lift-cylinder mounts is worth a closer look. Have your dealer verify the bowl frame and cylinder mounting before working a machine like that hard.
What wear or fatigue patterns show up on high-hour machines of this type?
At operating weights well over 100 t loaded, chassis fatigue is the recurring theme rather than any single wear part. Owners of retired mining-duty units describe frames as worn out with the steel effectively fatigued from years of cyclic loading, sometimes described informally as a crystallized chassis. Expect the large scraper-wheel and tractor drive tires to show correspondingly heavy wear given the tonnage they carry, and expect axle mounts and the gooseneck-pin area to be where fatigue cracking shows up first on tired machines.
Is there anything specific to watch on the powershift transmission?
The B-series' semi-automatic powershift is a different unit from the base 660's transmission, so parts and shift patterns are not interchangeable between the two. Technicians commonly flag correct powershift transmission fluid as the single biggest factor in clutch-pack life: running an engine oil or a GL-5 gear oil in it is too slippery for the friction discs to grip properly. That shows up to the operator as slipping or delayed shifts that can look like a worn-out clutch pack when the real cause is the wrong fluid in the sump.
What should I check before buying a used 660B?
Confirm what engine is actually installed. Many working 660Bs have been repowered away from the original turbocharged diesel, commonly to a Detroit Diesel Series 60, to meet emissions rules, so a factory-original engine is the exception rather than the rule. Inspect the chassis and gooseneck area closely for fatigue cracking, especially on ex-mining machines, since high-hour frames on this platform are known to fatigue badly. Check that the bowl and ejector are the standard configuration, since some 660Bs were built to custom mine specs with stretched bowls and lengthened ejector cylinders, which complicates sourcing wear parts. Run the powershift through its full range checking for clean, prompt shifts, and inspect the large scraper and tractor tires for age and wear given their cost. If the machine has Traction Aid, cycle it and check its hoses and pins. Because chassis integrity and transmission condition are both safety-critical on a machine this heavy, have your dealer verify frame condition and powershift clutch condition before putting one back to work.

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

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