Komatsubulldozerlarge (d80 - )

Komatsu D80A-12(S/N 10001-UP)

Maintenance schedule, common problems & OEM parts breakdown

The Komatsu D80A-12 (S/N 10001-up) is a mid-size crawler dozer built for production dozing, land clearing, and general earthmoving. It runs a Cummins NH-220-CI (Komatsu factory designation), a mechanical, naturally aspirated inline-six diesel rated at 134 kW (180 hp) at 1850 rpm, paired with a direct-drive powershift transmission offering five forward and four reverse speeds. Operating weight is about 21,550 kg (47,510 lb) in standard S-blade trim, with a 3.63 m blade width and 5.96 m3 capacity; weight and blade capacity vary with U-blade, angle-blade, or ripper configurations. Komatsu built this S/N 10001-up range in the early 1980s, ahead of the later D80A-18 (S/N 25001-up) generation, and offered related D80E and D80P variants alongside the base A-series dozer.

The move from D80A-12 to D80A-18 marked a generational engine change on the same D80-class chassis, away from the NH-220-CI mechanical engine used in the S/N 10001-up range. Komatsu kept the direct-drive powershift layout and S/U/angle-blade options across the family, so external dimensions and undercarriage geometry carry over more than the powertrain does. In today's used and parts market, the D80A-12 shows up mainly as a low-cost, fully mechanical alternative to later electronically controlled dozers. No ECM means no scan-tool dependency, and the Cummins-based NH-220-CI keeps rebuild parts available through generic mechanical-diesel channels rather than Komatsu-exclusive electronics. Buyers favor it for field-serviceability and simplicity over newer, more instrumented D-series dozers.

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.

Komatsu D80A-12(S/N 10001-UP) specifications

Engine

Engine model	NH-220-CI (factory-designated Cummins NH220 lineage, 6-cylinder inline diesel)
Cylinders	6
Gross power	134 kW (180 hp) at 1850 rpm
Displacement	12.17 L (742.7 cu in)
Aspiration / emissions tier	Not documented for this exact serial range in available spec sheets; this is a pre-emissions-era (1970s-80s) mechanically governed diesel with no published emissions tier — verify aspiration (NA vs turbo) with your dealer or the shop manual

Weights

Operating weight (standard S-blade config)	21,550 kg (47,510 lb)
Weight by configuration	Public spec sheets list one standard (S-blade) operating weight for this serial range; no separate XL/LGP weight variant is documented for the D80A-12(S/N 10001-UP)

Dimensions

Overall length, with blade	6.83 m (22.4 ft)
Overall length, without blade	4.60 m (15.1 ft)
Overall width, over tracks	2.62 m (8.6 ft)
Overall height, to top of cab	3.26 m (10.7 ft)
Ground clearance	0.40-0.43 m (1.3-1.4 ft) — minor variance across sources
Track length on ground	2.73 m (8.97 ft)
Track gauge	2.01 m (6.6 ft)
Standard shoe width	560 mm (22.1 in)

Performance

Transmission type	Direct-drive (DD) powershift, 5 forward / 4 reverse gears
Max travel speed, forward (top gear)	7.4 km/h (4.6 mph)
Max travel speed, reverse (top gear)	9.6-9.7 km/h (6.0 mph) — minor variance across sources
Ground pressure, standard shoe	56.9-57.2 kPa (8.25-8.3 psi) — minor variance across sources
Drawbar pull	Not documented for this exact serial range in available public spec sheets — verify with dealer or factory shop manual
Gradeability	Not documented for this exact serial range in available public spec sheets — verify with dealer or factory shop manual

Blades

Standard (S-type straight) blade width	3.63 m (11.9 ft)
Standard blade height	1.28 m (50.4 in)
Standard blade capacity	5.96 m³ (7.8 cu yd)
Standard blade max cutting depth	0.54 m (21.3 in)
Other blade types (SU/Angling/VPAT)	No capacity data tied specifically to this serial range found in available sources; only the standard straight (S-type) blade is documented for the D80A-12(S/N 10001-UP)

Undercarriage

Shoes per side	38
Track rollers per side	6
Carrier rollers per side	2
Track pitch	216-219 mm (8.51-8.6 in) — minor variance across sources

Service Capacities

Fuel tank	420 L (111 gal)
Cooling system	65.1 L (17.2 gal)
Engine oil capacity	Not documented for this exact serial range in available public spec sheets — verify with factory shop manual
Hydraulic system capacity	Not documented for this exact serial range in available public spec sheets — verify with factory shop manual

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

D80A-12(S/N 10001-UP) fluids & capacities

System	Capacity	Recommended fluid
Machine identification / engine	n/a	D80A-12 (S/N 10001-Up) is powered by a Cummins NH-220-CI diesel: a mechanical, naturally aspirated inline-6, rated approximately 134 kW (180 hp) net at 1,850 rpm. This is an OEM Cummins engine fitted to this early -12 chassis generation, not one of Komatsu's own S6D/6D-family engines. Fluid data below is scoped to this D80A-12 (S/N 10001-Up) engine/chassis pairing and should not be applied to the later D80A-18 (S/N 25001-Up), D80E-18, D80P-12, or D80P-18 chassis, which use different engines and/or driveline generations.
Engine crankcase (with filter)	Approx. 26 L (7 US gal) is the published rear-sump crankcase fill for the Cummins NH-220 engine family generally. The exact factory refill quantity (with filter change) specific to this chassis's NH-220-CI installation, and this machine's own periodic-maintenance chart figure, were not confirmed in the available literature. Verify against the machine's fuel/coolant/lubricant table or with a dealer before servicing.	Diesel engine oil to the API CC/CD-class specification appropriate for this mechanical, naturally aspirated engine generation - typically SAE 15W-40 for normal ambient conditions, SAE 10W-30 or straight SAE 10W in cold climates, SAE 30 or 40 in sustained hot climates. Komatsu-branded Diesel Engine Oil (EO series) or an equivalent CD-class heavy-duty diesel oil is appropriate; the exact factory-specified grade for this Cummins-powered chassis was not confirmed.
Cooling system	65 L (17.2 US gal).	Komatsu Super Coolant (or an equivalent extended-life, all-season, anti-corrosion coolant), supplied as concentrate and mixed 50/50 with water for normal ambient conditions. Increase the concentrate ratio per Komatsu's freeze-protection chart for extreme cold. Confirm compatibility with the Cummins NH-220 cooling circuit before use.
Fuel tank	420 L (111 US gal).	Automotive diesel fuel (ASTM D975 No. 2-D equivalent) for normal conditions; switch to a lighter No. 1-D-equivalent fuel in cold weather to prevent gelling. Keep the tank topped off at the end of each shift to reduce condensation.
Transmission, bevel gear case, and steering clutch/brake compartments (power train)	Not confirmed for this exact chassis. The factory shop manual lists Transmission, Torque, Bevel Gears, and Steering System as distinct sections, indicating separate driveline compartments on this older mechanical-drive dozer, but individual refill volumes were not accessible in the documentation reviewed.	Komatsu Powertrain Oil (TO), meeting Komatsu's powertrain-oil performance specification: SAE 10W for cold-weather operation, SAE 30 for normal/warm ambient conditions. A CD/CE-class heavy-duty diesel engine oil in the matching viscosity grade is an accepted equivalent where dedicated Komatsu powertrain oil is unavailable.
Final drives (each side)	Not confirmed for this chassis; no independently published per-side final-drive refill figure was found.	Likely serviced with the same Komatsu Powertrain Oil (TO) grade as the transmission/steering compartments on this driveline generation, unless this machine's periodic maintenance chart calls out a dedicated final-drive fill point using Komatsu Gear Oil (GO), SAE 80W-90 or 85W-140, API GL-5 class. Confirm which applies before servicing.
Hydraulic system / tank (work equipment - blade lift/tilt circuit)	Not confirmed. Factory parts documentation shows the steering-and-transmission oil circuit on this chassis served by a separate pump from the work-equipment (blade lift/tilt) hydraulic pump, but no standalone hydraulic tank capacity was found in accessible literature.	Komatsu Hydraulic Oil (HO), ISO VG46-equivalent, for the work-equipment (blade lift/tilt) circuit. Confirm whether the steering/transmission circuit shares this reservoir or draws from the powertrain oil sump before topping off.
Pivot shaft / equalizer bar center pin	Grease point only; no fill volume applies.	Not separately documented for the D80A-12 (S/N 10001-Up) itself, but the equalizer bar/pivot shaft center pin is a standard grease point on comparable Komatsu dozer mainframes of this era. Service with general-purpose chassis grease on the periodic lubrication schedule. Verify the exact grease-point location and interval against this machine's own maintenance chart.
Grease (chassis pins, bushings, blade linkage) - spec only	Not applicable; grease points are serviced per the periodic lubrication schedule, not a fill volume.	Komatsu general-purpose lithium-base grease, NLGI 2 (Komatsu Grease G2-LI or equivalent), for normal temperatures. Use a lower-consistency arctic-grade lithium grease (NLGI 1 or 0/00) in sustained sub-freezing climates.

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

Komatsu D80A-12(S/N 10001-UP) maintenance schedule

Service interval	Tasks
Every 10 h	Check engine oil level and coolant level on the NH-220-CI before starting; top off as needed. Drain water and sediment from the fuel tank sump and the primary fuel filter/water separator. Inspect track tension, shoes, and rollers for wear, cracks, or loose hardware. Check hydraulic tank fluid level for the blade lift and tilt circuit. Grease track idler, carrier roller, and equalizer bar pivots on the weekly pass. Check powershift transmission oil level and look for leaks at the direct-drive final drives.
Every 250 h	Change engine oil and replace the oil filter element. Replace the fuel filter element and bleed the mechanical fuel system. Grease blade linkage pins, lift cylinder pivots, and C-frame pivot points. Check and adjust track sag on both sides. Inspect the air cleaner element; clean or replace as needed.
Every 500 h	Replace the hydraulic tank return-line filter element. Check powershift transmission oil condition and top off. Inspect and adjust steering clutch and brake linkage since there is no electronic feedback to rely on. Check final drive case oil level on each side. Clean the radiator core and inspect fins to protect the naturally aspirated engine from overheating.
Every 1,000 h	Replace transmission/torque converter oil and the transmission oil filter. Replace final drive case oil on both sides. Replace hydraulic tank oil and the suction strainer. Check and adjust valve clearance on the NH-220-CI. Measure track link and bushing wear; rotate or turn track shoes if within tolerance.
Every 2,000 h	Replace engine coolant and flush the cooling system. Inspect and recalibrate mechanical fuel injection pump timing. Inspect steering clutch and brake packs for wear. Check torque converter and powershift clutch pack condition. Inspect undercarriage bushings and pins for turn-eligibility or replacement.
Every 4,000 h	Pull and inspect or rebuild the fuel injection pump and injectors. Inspect or overhaul the torque converter and powershift clutch packs. Inspect final drive gear sets and bearings; rebuild as needed. Evaluate the undercarriage (chains, rollers, idlers, sprockets) for full replacement.

Servicing the D80A-12(S/N 10001-UP) beyond the schedule

Predictive Maintenance and Fluid Analysis

This machine predates onboard diagnostics, so fluid sampling is the main early-warning tool. Pull periodic oil samples from the NH-220-CI engine, powershift transmission, and both final drive cases to track metal wear before a bearing or clutch pack fails. Watch coolant condition closely on this naturally aspirated engine, since scale buildup accelerates overheating. Measure track pin and bushing wear on a set schedule, since turning or replacing track components early is cheaper than a mid-job breakdown on this direct-drive undercarriage.

Corrective and Common Repairs

Typical failure points on the D80A-12 are mechanical fuel-system wear (injection pump and nozzles), steering clutch and brake linkage adjustment, and track chain/bushing wear from a direct-drive undercarriage that carries full load without electronic torque cushioning. Powershift clutch packs and the torque converter are common rebuild items after heavy dozing cycles. With no ECM, most faults trace to mechanical linkage, hydraulic seals, or fuel delivery rather than sensors, so compression and fuel-pressure checks are the usual first diagnostic step.

Overhaul and Rebuild Points

Major rebuild work centers on the NH-220-CI long block, injection pump, and powershift transmission clutch packs, plus the final drive gear sets that carry the direct-drive torque path. Undercarriage rebuilds, covering track chains, rollers, idlers, and sprockets, are the highest-cost overhaul item on this class of dozer and should be planned around measured wear rather than a fixed hour count. Steering clutch and brake pack overhaul typically accompanies transmission work since both share the same powertrain teardown.

Seasonal and Environment Servicing

In cold climates, block heating and battery care matter more on this mechanical engine, since there is no electronic cold-start assist beyond factory glow/start aids; match engine and hydraulic oil viscosity to ambient temperature. In hot, dusty environments, clean the radiator core and air cleaner more often to protect the naturally aspirated NH-220-CI from heat soak and abrasive intake air. Wet or muddy sites accelerate steering clutch and final drive seal wear, so check those seals more often than the standard interval calls for.

D80A-12(S/N 10001-UP) common service parts

Part number	Part	Notes
07102-20604	Hose,(Without Add. Filter)	Scheduled service item	Check fitment →
154-60-01110	Filter Ass'Y	Scheduled service item	Check fitment →

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

D80A-12(S/N 10001-UP) attachments & work tools

Blades

Factory-fitted straight (S) dozer blade is the confirmed configuration for this serial range: width about 3.62 m (11 ft 11 in), capacity about 5.96 m3 (7.8 cu yd), max cutting depth about 540 mm (21.3 in), blade height about 1.28 m. Semi-U (SU) and angle-blade variants are common across this Komatsu -12 dozer class but a factory option list tied specifically to this serial range is not documented in available sources — verify with your dealer. VPAT (variable-pitch angle-tilt) is a competitor-brand term and is not a Komatsu D80A-12 offering.

Rippers

A rear-mounted multi-shank parallelogram ripper (commonly 3-shank/3-tip, hydraulically raised/tilted by twin cylinders) is the typical heavy-class option for this dozer's size range. A single (giant) shank ripper is also offered for this class where maximum penetration force in hard/compacted material is needed, trading shank count for depth. Shank/beam weights are not documented for this exact serial range in available sources — confirm against the factory ripper option chart.

Winches

A rear-mounted PTO-driven towing winch is a factory option across Komatsu's -12 generation dozer line and mounts in place of the ripper when fitted, sharing the rear power take-off. Drum capacity, cable size, and line-pull figures specific to the D80A-12 (S/N 10001-UP) are not confirmed in available documentation — treat as class-typical only and verify before ordering.

Drawbars/counterweights

A rigid rear drawbar is offered for towing duty when no ripper or winch is fitted, mounting to the same rear frame provision. Rear counterweights are used to balance the machine when the rear end is left bare (no ripper/winch/drawbar) or when a heavier front blade is fitted; exact weights for this serial range are not documented in available sources.

Cab/ROPS guarding

A ROPS-rated operator cab is a confirmed factory fitment option on this dozer platform (documented for the D85A-12 sibling built on the same -12 chassis). Forestry/waste-handling guard packages (screened cab glass, top/front sweeps, belly and radiator screens) are typical aftermarket or factory-optional additions for this dozer class, but a package specific to the D80A-12 (S/N 10001-UP) is not documented in available sources — confirm with dealer for this exact serial range.

Hydraulic arrangement

Blade lift and tilt are driven by an engine-mounted hydraulic pump through a valve bank near the operator station, consistent with the factory steering/work-equipment pump fitted to this model. When a rear ripper or winch is fitted, it draws from a separate rear-mounted circuit/valve section rather than sharing the blade circuit, so blade and rear-tool operation can run independently.

All D80A-12(S/N 10001-UP) assemblies by section

Every catalogued assembly group for the Komatsu D80A-12(S/N 10001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Engine Related Parts And Electrical System

Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Accelerator Lever

01***35	Bolt	1
01***14	Bolt	1
01***35	Bolt, Mounting - Flywheel Housing End	1
01***30	Bolt	2

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Battery(#10001-10010)

01***25	Bolt	6
01***08	Nut	5
01***06	Nut	8
01***30	Washer,Spring	6

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Battery(#10011-)

01***16	Bolt	5
01***16	Bolt,(For Slag Handling)	5
01***20	Bolt,(Used When Towing Winch)	5
01***25	Bolt - Rear Guard Mounting	5

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Compression Release Lever(#10001-10010)

01***35	Bolt	1
01***35	Bolt, Mounting - Flywheel Housing End	1
01***70	Bolt	1
01***05	Nut	2

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Electrical System (1/2)(#10011-)

01***16	Bolt	5
01***20	Bolt	2
01***25	Bolt	2
01***16	Bolt,(For Slag Handling)	10

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Electrical System (2/2)(#10011-)

01***16	Bolt	5
01***20	Bolt	2
01***25	Bolt	2
01***16	Bolt,(For Slag Handling)	10

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Electrical System(#10001-10010)

01***16	Bolt	1
01***20	Bolt	3
01***25	Bolt	4
01***25	Bolt	2

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Engine Attaching Parts

01***45	Bolt	4
01***45	Bolt	4
04***80	Wire,Lock	2
17***30	Front Shim Ass'Y	2

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Engine Related Parts

01***18	Bolt,(Without Head Guard)	1
01***25	Bolt - Rear Guard Mounting	3
01***25	Screw	3
01***25	Screw	1

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Fuel Tank (Air Vessel Type)(#10005-10010)

01***25	Bolt	2
01***80	Bolt	2
01***20	Bolt	2
01***25	Bolt,(For Ripper)	6

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Fuel Tank (Float Type)

01***25	Bolt	2
01***25	Bolt,(Without Auto Priming System)	2
01***16	Bolt,(Sandy And Dusty Spec.)	1
01***20	Bolt,(Large Capacity Type) (Std)	5

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Instrument Panel

01***12	Screw	1
01***20	Screw	2
01***15	Nut	4
01***08	Nut, Regular Hexagon (M10-1.50)	4

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Power Take Off

01***25	Bolt,(Sandy? Dusty Terrain Spec.)	8
01***20	Bolt,(Used When Towing Winch)	1
01***30	Bolt,Radio Controlled Slag Handling	4
01***35	Bolt - Torque Converter Totransmission Mounting	2

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Radiator (1/2)(#21017-)

01***22	Bolt	2
01***25	Bolt,(Sandy? Dusty Terrain Spec.)	76
01***20	Bolt,(Used When Towing Winch)	1
01***25	Bolt - Rear Guard Mounting	4

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Radiator (2/2)(#21017-)

01***20	Bolt,(Sandy? Dusty Terrain Spec.)	2
01***22	Bolt,(Cold Terrain Spec.)	2
01***20	Bolt,(Used When Towing Winch)	2
01***25	Bolt - Rear Guard Mounting	9

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Komatsu : D80a-12(S/N 10001-Up) : Engine Related Parts And Electrical System : Radiator(#10001-21016)

01***20	Bolt	6
01***22	Bolt	2
01***22	Bolt,(Cold Terrain Spec.)	2
01***22	Bolt	2

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Final Drive And Steering System

Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Bevel Gear And Shaft

01***25	Bolt,(Sandy? Dusty Terrain Spec.)	2
01***30	Bolt,Radio Controlled Slag Handling	12
01***40	Bolt,(Not Used With Cab)	16
01***40	Bolt	16

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Brake

01***16	Bolt,(Sandy And Dusty Spec.)	4
01***30	Bolt,Radio Controlled Slag Handling	36
01***35	Bolt - Torque Converter Totransmission Mounting	4
01***50	Bolt - Torque Converter Totransmission Mounting	4

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Brake Pedal

01***12	Bolt	1
01***45	Bolt	2
01***12	Bolt (M8-1.25x12)	1
01***25	Bolt - Rear Guard Mounting	2

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Final Drive Case And Gear

01***20	Bolt,(Used When Towing Winch)	2
01***30	Bolt,Radio Controlled Slag Handling	22
01***40	Bolt,(For Center Guard)	24
01***35	Bolt	6

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Main Clutch Piping(#10001-10010)

01***30	Bolt	8
01***25	Bolt,(For Ripper)	1
01***30	Bolt	8
01***55	Bolt	4

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Main Clutch Piping(#10011-)

01***25	Bolt,(Sandy? Dusty Terrain Spec.)	3
01***30	Bolt,(For France Noise Suppression)	16
01***35	Bolt, Mounting - Flywheel Housing End	8
01***40	Bolt,(Dust And Dirt Protection)	3

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Sprocket And Shaft

01***35	Bolt - Torque Converter Totransmission Mounting	20
01***40	Bolt,(Not Used With Cab)	12
01***50	Bolt, Radiator To Frame	10
01***60	Bolt	8

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Steering Case

01***30	Bolt,Radio Controlled Slag Handling	15
01***40	Bolt, Fuel Tank Mounting - Rear	6
01***35	Bolt	6
01***40	Stud,Bolt	10

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Steering Clutch

01***20	Bolt,(Used When Towing Winch)	1
01***30	Bolt,Radio Controlled Slag Handling	1
01***50	Bolt	16
01***50	Bolt	16

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Steering Control Valve

01***25	Bolt	2
01***25	Bolt,(Without Auto Priming System)	2
01***25	Bolt,(Sandy? Dusty Terrain Spec.)	8
01***30	Bolt,(For France Noise Suppression)	5

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Steering Filter

01***30	Bolt,Radio Controlled Slag Handling	8
01***07	Nut	1
01***36	Washer,Radio Controlled Slag Handling	8
01***08	Washer	1

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Steering Lever

01***12	Bolt	3
01***12	Bolt (M8-1.25x12)	3
01***25	Bolt - Rear Guard Mounting	4
01***30	Bolt,Radio Controlled Slag Handling	15

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Steering Piping(#10001-10010)

01***25	Bolt	5
01***30	Bolt	12
01***30	Bolt	8
01***35	Bolt	2

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Steering Piping(#10011-)

01***25	Bolt,(Sandy? Dusty Terrain Spec.)	4
01***30	Bolt,(For France Noise Suppression)	22
01***30	Bolt,Radio Controlled Slag Handling	9
01***35	Bolt - Torque Converter Totransmission Mounting	6

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Steering Pump(#10001-19570)

01***90	Bolt	6
01***40	Stud	4
01***08	Nut,R.H. Thread	4
01***10	Nut,(Service Only)	8

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Steering Pump(#19571-)

01***90	Bolt	6
01***40	Stud	4
01***08	Nut,R.H. Thread	4
01***10	Nut,(Service Only)	8

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Steering Strainer(#10001-10010)

01***20	Bolt	6
01***25	Bolt,(For Ripper)	6
01***30	Bolt	4
01***30	Stud	3

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Komatsu : D80a-12(S/N 10001-Up) : Final Drive And Steering System : Steering Strainer(#10011-)

01***25	Bolt - Rear Guard Mounting	10
01***30	Bolt,Radio Controlled Slag Handling	9
01***30	Stud	3
01***10	Nut,(Dust?Drip Proof? Trimming S.)	3

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Main Clutch? Torque Convertor And Transmission

Komatsu : D80a-12(S/N 10001-Up) : Main Clutch? Torque Convertor And Transmission : Counter Shaft

01***40	Bolt,(Dust And Dirt Protection)	6
01***35	Bolt, Mount Carrier	3
01***36	Washer,Radio Controlled Slag Handling	6
04***10	Key	1

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Komatsu : D80a-12(S/N 10001-Up) : Main Clutch? Torque Convertor And Transmission : Gear Shift Fork

01***20	Bolt	2
01***20	Bolt,(Sandy? Dusty Terrain Spec.)	2
01***25	Bolt - Rear Guard Mounting	3
01***30	Bolt,Radio Controlled Slag Handling	12

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Komatsu : D80a-12(S/N 10001-Up) : Main Clutch? Torque Convertor And Transmission : Gear Shift Lever

01***35	Bolt	1
01***20	Bolt,(Large Capacity Type) (Std)	4
01***35	Bolt, Mounting - Flywheel Housing End	1
01***16	Screw	1

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Komatsu : D80a-12(S/N 10001-Up) : Main Clutch? Torque Convertor And Transmission : Intermediate Shaft

01***40	Bolt,(Dust And Dirt Protection)	6
01***35	Bolt, Mount Carrier	6
01***36	Washer,Radio Controlled Slag Handling	6
04***10	Key	2

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Komatsu : D80a-12(S/N 10001-Up) : Main Clutch? Torque Convertor And Transmission : Main Clucth Housing

01***14	Bolt	2
01***25	Bolt	2
01***14	Bolt	2
01***25	Bolt,(Without Auto Priming System)	2

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Komatsu : D80a-12(S/N 10001-Up) : Main Clutch? Torque Convertor And Transmission : Main Clutch Booster

01***20	Bolt	4
01***45	Bolt	4
01***20	Bolt,(Sandy? Dusty Terrain Spec.)	4
01***45	Bolt,(S6d155-4b)	4

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Komatsu : D80a-12(S/N 10001-Up) : Main Clutch? Torque Convertor And Transmission : Main Clutch Disc

01***25	Bolt,(Sandy? Dusty Terrain Spec.)	3
01***30	Bolt,(For France Noise Suppression)	6
01***35	Bolt - Torque Converter Totransmission Mounting	12
01***11	Nut	2

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Komatsu : D80a-12(S/N 10001-Up) : Main Clutch? Torque Convertor And Transmission : Main Clutch Drive Shaft

01***35	Bolt, Mounting - Flywheel Housing End	4
01***55	Bolt,(For Suction? Reversible Fan)	9
01***50	Bolt, Radiator To Frame	1
01***50	Bolt	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Main Clutch? Torque Convertor And Transmission : Main Clutch Pump

01***30	Bolt,(For France Noise Suppression)	4
01***30	Stud	4
01***08	Nut,R.H. Thread	4
01***10	Nut,(Service Only)	8

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Komatsu : D80a-12(S/N 10001-Up) : Main Clutch? Torque Convertor And Transmission : Main Shaft

01***10	Bolt, Mount Flasher	6
01***35	Bolt - Torque Converter Totransmission Mounting	3
01***50	Bolt - Torque Converter Totransmission Mounting	6
01***36	Washer,Radio Controlled Slag Handling	6

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Komatsu : D80a-12(S/N 10001-Up) : Main Clutch? Torque Convertor And Transmission : Shift Control

01***35	Bolt	5
01***35	Bolt, Mounting - Flywheel Housing End	7
01***30	Bolt,Radio Controlled Slag Handling	8
01***08	Nut,(L)	2

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Komatsu : D80a-12(S/N 10001-Up) : Main Clutch? Torque Convertor And Transmission : Transmission Case

01***40	Bolt,(Dust And Dirt Protection)	10
01***75	Bolt,(For 75a Alternator)	4
01***36	Washer,Radio Controlled Slag Handling	14
04***24	Pin,Dowel (For No.3 Housing)	1

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Komatsu : D80a-12(S/N 10001-Up) : Main Clutch? Torque Convertor And Transmission : Universal Joint

01***55	Bolt,(For France Noise Suppression)	8
01***10	Nut,(Dust?Drip Proof? Trimming S.)	2
01***36	Washer,Radio Controlled Slag Handling	10
07***75	Fitting,Grease (Without Lub. Piping)	4

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Optional Parts

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Angle Blade

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Angle Blade? For Tree Dozer(#15855-)

01***80	Bolt	2
01***50	Bolt, Fuel Tank Mounting - Front Left	4
01***95	Bolt, Counterweight	4
01***15	Nut,(For Slag Handling)	2

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Angle Rake Dozer

01***80	Bolt	2
01***50	Bolt, Fuel Tank Mounting - Front Left	4
01***95	Bolt, Counterweight	4
01***15	Nut,(For Slag Handling)	2

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Blade Quick Drop System (1/2)

01***16	Bolt,(For Slag Handling)	2
01***25	Bolt,(Without Auto Priming System)	1
01***35	Bolt - Torque Converter Totransmission Mounting	5
01***40	Bolt,(Dust And Dirt Protection)	8

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Blade Quick Drop System (2/2)

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : C-Frame? For Tree Dozer(#15855-)

01***40	Bolt,(Not Used With Cab)	16
01***45	Bolt	12
01***60	Screw	2
01***42	Washer,Spring (For Pedal Steering)	16

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Cab Guard? For Jungle(#15382-)

01***16	Bolt,(For Slag Handling)	1
01***30	Bolt,Radio Controlled Slag Handling	18
01***30	Bolt,(For Center Guard)	6
01***40	Bolt,(Not Used With Cab)	8

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Canopy

01***35	Bolt, Mounting - Flywheel Housing End	4
01***50	Bolt	8
01***35	Bolt - Torque Converter Totransmission Mounting	24
01***40	Bolt,(Dust And Dirt Protection)	4

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Car Heater? For Steel Cab(#19699-21241)

01***20	Bolt,(Sandy? Dusty Terrain Spec.)	12
01***25	Bolt,(Without Auto Priming System)	4
01***16	Bolt,(Sandy And Dusty Spec.)	2
01***25	Bolt - Rear Guard Mounting	4

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Car Heater? For Steel Cab(#21242-)

01***12	Bolt,(Without R.P.C.U.)	2
01***20	Bolt,(Large Capacity Type) (Std)	8
01***25	Bolt,(Sandy? Dusty Terrain Spec.)	2
01***20	Bolt,(Used When Towing Winch)	1

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Chip Blade(#15478-)

01***20	Bolt	2
01***35	Bolt,(For Pedal Steering)	1
01***40	Bolt,(Not Used With Cab)	12
01***45	Bolt	6

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Coal Dozer? 13m3

01***35	Bolt - Torque Converter Totransmission Mounting	2
01***80	Bolt	2
01***45	Bolt	12
01***85	Bolt	24

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Double Angle Tilt Dozer(#10011-)

01***35	Bolt,(For Pedal Steering)	20
01***40	Bolt,(Not Used With Cab)	6
01***95	Bolt	2
01***80	Bolt	2

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Double Angle Tilt Piping? Blade Side(#10011-)

01***50	Bolt,(For Trimming Dozer)	16
01***70	Bolt, Spacer	2
01***30	Bolt,Radio Controlled Slag Handling	6
01***11	Nut,(With Under Mirror)	24

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Electrical System? For Steel Cab(#19699-21241)

01***25	Bolt (M6-1.00x25)	8
01***16	Bolt,(For Slag Handling)	7
01***20	Bolt,(Sandy? Dusty Terrain Spec.)	4
01***20	Bolt,(Used When Towing Winch)	2

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Electrical System? For Steel Cab(#21242-)

01***16	Bolt (Welded)	4
01***25	Bolt (M6-1.00x25)	8
01***16	Bolt,(For Slag Handling)	8
01***20	Bolt,(Large Capacity Type) (Std)	3

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Engine Side Cover(Anti-Noise Modification Parts)(#10588-21016)

01***20	Bolt,(Large Capacity Type) (Std)	22
01***35	Bolt - Torque Converter Totransmission Mounting	18
01***60	Bolt, Trunnion Cap	8
01***15	Nut,Lock	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Head Guard

01***65	Bolt (M12-1.75x65)	8
01***75	Bolt,(For 75a Alternator)	8
01***35	Bolt, Bolt, Mount Tubes To Switch And Work Pumps	16
01***50	Bolt	8

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Modification Parts For 200ps Engine Tractor (1/2)(#21017-)

01***35	Bolt - Torque Converter Totransmission Mounting	8
01***36	Washer,Radio Controlled Slag Handling	8
01***32	Washer,(Dust And Dirt Protection)	8
15***30	Plate	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Modification Parts For 200ps Engine Tractor (2/2)(#21017-)

01***35	Bolt - Torque Converter Totransmission Mounting	8
01***36	Washer,Radio Controlled Slag Handling	8
01***32	Washer,(Dust And Dirt Protection)	8
15***30	Plate	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Perforated Engine Side Cover? L.H.(#21017-)

01***25	Bolt,(Without Auto Priming System)	8
01***25	Bolt - Rear Guard Mounting	2
01***30	Bolt,Radio Controlled Slag Handling	36
01***40	Bolt,(Dust And Dirt Protection)	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Perforated Engine Side Cover? R.H.(#21017-)

01***25	Bolt - Rear Guard Mounting	6
01***30	Bolt,Radio Controlled Slag Handling	88
01***35	Bolt - Torque Converter Totransmission Mounting	6
01***40	Bolt,(Dust And Dirt Protection)	6

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : R.O.P.S And Bracket(#21356-)

01***55	Bolt, Strut Mounting - To Radiator And Rear Frame	12
01***60	Bolt (M20-2.50x60)	6
01***16	Nut,(Balancer)	6
01***60	Washer,Spring	18

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Radiator Grille Protector Cover(#10011-)

01***95	Bolt	2
01***95	Bolt	2
01***00	Bolt	4
01***48	Washer,Spring	6

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Radiator Guard? Engine Hood And Muffler(Anti-Noise Modificat(#H10588-21016)

01***20	Bolt,(Large Capacity Type) (Std)	24
01***35	Bolt - Torque Converter Totransmission Mounting	4
01***18	Washer	24
01***20	Washer (Kit)	4

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Radiator(Anti-Noise Modification Parts)(#H10588-21016)

01***20	Bolt,(Used When Towing Winch)	3
01***25	Bolt - Rear Guard Mounting	6
01***10	Nut,(Dust?Drip Proof? Trimming S.)	1
01***20	Washer (Kit)	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Snow Plow(#15677-)

01***20	Bolt	4
01***20	Bolt,(Sandy? Dusty Terrain Spec.)	3
01***60	Bolt,(Except Pll)	2
01***16	Screw	3

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Steel Cab And Car Heater (1/2)(#10011-19698)

01***12	Bolt,(Without R.P.C.U.)	8
01***16	Bolt (Welded)	4
01***25	Bolt (M6-1.00x25)	8
01***16	Bolt,(For Slag Handling)	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Steel Cab And Car Heater (2/2)(#10011-19698)

01***12	Bolt,(Without R.P.C.U.)	8
01***16	Bolt (Welded)	4
01***25	Bolt (M6-1.00x25)	8
01***16	Bolt,(For Slag Handling)	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Steel Cab(#19699-21241)

01***12	Bolt,(Without R.P.C.U.)	11
01***20	Bolt,(Large Capacity Type) (Std)	4
01***30	Bolt,(For France Noise Suppression)	3
01***40	Bolt,(Not Used With Cab)	14

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Steel Cab(#21242-)

01***12	Bolt,(Without R.P.C.U.)	6
01***16	Bolt (Welded)	4
01***25	Bolt,(Sandy? Dusty Terrain Spec.)	12
01***30	Bolt,(For France Noise Suppression)	3

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Straight Rake Dozer(#15478-)

01***30	Bolt,(For Center Guard)	4
01***35	Bolt,(For Pedal Steering)	2
01***40	Bolt,(Not Used With Cab)	42
01***45	Bolt	12

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Swing Drawbar(#10011-)

01***50	Bolt	6
01***85	Bolt	6
01***50	Bolt	4
01***50	Bolt	6

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Tilt Cylinder? For Double Angle Tilt Dozer(#10011-)

01***45	Bolt,(For Travel Motor) (Not Show)	2
01***75	Bolt	4
01***48	Washer,Spring (For Slag Handling), Washer-Spring	2
01***83	Washer, Spring	4

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Tree Pusher(#15855-)

01***45	Bolt	12
01***60	Screw	2
01***68	Washer,(Not Shown)	12
01***83	Washer, Spring	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : U-Blade(#15478-)

01***30	Bolt,(For Center Guard)	4
01***35	Bolt,(For Pedal Steering)	2
01***40	Bolt,(Not Used With Cab)	48
01***45	Bolt	12

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Vandalisum Protection (1/2)(#10011-)

07***00	Cap,(For Vandalism) (Not Shown) (Op)	1
07***00	Cap, Locking - Hydraulic Tank Oil Filler Cap	1
07***00	Cap,(For Vandalism Protection)	1
09***04	Lock,(Includes 4 P.C.S.)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Vandalisum Protection (2/2)(#10011-)

07***00	Cap,(For Vandalism) (Not Shown) (Op)	1
07***00	Cap, Locking - Hydraulic Tank Oil Filler Cap	1
07***00	Cap,(For Vandalism Protection)	1
09***04	Lock,(Includes 4 P.C.S.)	1

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Komatsu : D80a-12(S/N 10001-Up) : Optional Parts : Water Pump And Tension Pulley(Anti-Noise Modification Parts)(#10588-21016)

60***10	V-Belt	1
66***21	Pulley	1

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Tool And Kit

Komatsu : D80a-12(S/N 10001-Up) : Tool And Kit : Kit : Unit_03_of_03

04***25	Ring, Retaining	1
04***12	Lock (Kit)	1
04***12	Lock (Kit)	1
06***04	Seal,Bearing (K2)	2

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Komatsu : D80a-12(S/N 10001-Up) : Tool And Kit : Kit : Unit_02_of_03

04***25	Ring, Retaining	1
04***12	Lock (Kit)	1
04***12	Lock (Kit)	1
06***04	Seal,Bearing (K2)	2

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Komatsu : D80a-12(S/N 10001-Up) : Tool And Kit : Kit : Unit_01_of_03

04***25	Ring, Retaining	1
04***12	Lock (Kit)	1
04***12	Lock (Kit)	1
06***04	Seal,Bearing (K2)	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Tool And Kit : Tool

01***20	Bolt,(Sandy? Dusty Terrain Spec.)	5
01***35	Bolt - Torque Converter Totransmission Mounting	4
01***10	Nut - M12	4
01***25	Washer,Spring?(Sandy And Dusty Spec.)	5

See all parts with full part numbers in Heavy Parts AI →

Track And Guard

Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Bottom Guard

01***40	Bolt,(For Center Guard)	15
01***50	Bolt, Radiator To Frame	15
01***40	Bolt, Fuel Tank Mounting - Rear	2
01***45	Bolt, Fuel Tank Mounting - Front Right	11

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Carrier Roller

01***30	Bolt,(For France Noise Suppression)	4
01***45	Bolt, Fuel Tank Mounting - Front Right	16
01***50	Bolt, Fuel Tank Mounting - Front Left	16
01***85	Bolt	8

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Drawbar

01***85	Bolt	6
01***85	Bolt	6
01***60	Bolt (Ger)	1
01***75	Bolt	1

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Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Fender And Bracket(#10011-)

01***25	Bolt - Rear Guard Mounting	5
01***30	Bolt,Radio Controlled Slag Handling	16
01***35	Bolt,(For Pedal Steering)	16
01***40	Bolt,(For Center Guard)	30

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Fender And Floor Board(#10001-10010)

01***25	Bolt,(For Ripper)	24
01***25	Bolt	4
01***40	Bolt	30
01***45	Bolt	12

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Floor Board(#10011-)

01***25	Bolt - Rear Guard Mounting	10
01***35	Bolt - Torque Converter Totransmission Mounting	1
01***25	Bolt,(For Slag Handling)	4
01***65	Bolt - Battery Box	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Front Idler

01***35	Bolt - Torque Converter Totransmission Mounting	16
01***25	Bolt,(For Shipping)	8
01***45	Bolt, Mount Bracket	16
01***45	Bolt, Fuel Tank Mounting - Front Right	8

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Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Guard And Engine Hood (1/2)(#10011-)

01***16	Bolt	8
01***25	Bolt	16
01***16	Bolt,(For Slag Handling)	8
01***25	Bolt,(Without Auto Priming System)	16

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Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Guard And Engine Hood (2/2)(#10011-)

01***16	Bolt	8
01***25	Bolt	16
01***16	Bolt,(For Slag Handling)	8
01***25	Bolt,(Without Auto Priming System)	16

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Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Guard And Engine Hood(#10001-10010)

01***16	Bolt	8
01***25	Bolt	6
01***20	Bolt	2
01***25	Bolt,(For Ripper)	29

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Operator'S Seat(#10001-15841)

01***30	Bolt	10
01***30	Bolt,(Cold Terrain Spec.)	14
01***20	Bolt,(Large Capacity Type) (Std)	2
01***22	Bolt	6

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Operator'S Seat(#15842-)

Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Recoil Spring

01***20	Bolt,(Large Capacity Type) (Std)	8
01***25	Bolt - Rear Guard Mounting	2
01***40	Bolt,(Dust And Dirt Protection)	12
01***45	Bolt,(Cold Terrain Spec.)	4

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Suspension

01***40	Bolt,(For Center Guard)	4
01***55	Bolt,(For Long Track)	4
01***75	Bolt, Hanger Bearing Mounting	8
01***40	Bolt	8

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Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Track Frame

01***25	Bolt - Rear Guard Mounting	12
01***30	Bolt,Radio Controlled Slag Handling	4
01***35	Bolt - Torque Converter Totransmission Mounting	4
01***00	Bolt	4

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Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Track Frame Cover

01***30	Bolt,Radio Controlled Slag Handling	38
01***35	Bolt - Torque Converter Totransmission Mounting	2
01***30	Screw	10
01***40	Bolt,(For Center Guard)	10

See all parts with full part numbers in Heavy Parts AI →

Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Track Roller

01***35	Bolt - Torque Converter Totransmission Mounting	12
01***70	Capscrew (4) (Qty.26 (5))	48
01***70	Bolt	48
01***36	Washer,Radio Controlled Slag Handling	12

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Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Track Roller Guard

01***40	Bolt,(For Center Guard)	12
01***40	Bolt, Fuel Tank Mounting - Rear	24
01***50	Bolt, Fuel Tank Mounting - Front Left	10
01***55	Bolt, Strut Mounting - To Radiator And Rear Frame	10

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Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Track Shoe

01***26	Nut? Shoe (Kit)	304
14***50	Track Link Ass'Y	1
15***01	Shoe Bolt And Nut K	1
15***21	Bolt,Shoe (Kit)	304

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Komatsu : D80a-12(S/N 10001-Up) : Track And Guard : Track Shoe (Op)

01***26	Nut? Shoe (Kit)	304
14***10	Bolt,Shoe (Kit)	304
14***50	Track Link Ass'Y	1
14***60	Track Link Ass'Y	1

See all parts with full part numbers in Heavy Parts AI →

Work Equipment And Its Control System

Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Blade Control Lever(#10011-)

01***20	Bolt,(Large Capacity Type) (Std)	1
01***35	Bolt, Mounting - Flywheel Housing End	2
01***25	Bolt - Rear Guard Mounting	12
01***45	Bolt	1

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Brake And Clutch Band (Cable Type)(#10001-21016)

01***16	Screw	2
01***08	Nut,(L)	4
01***11	Nut (M14-1.50 Thd), Nut; Was 01582-01411	4
01***29	Washer	4

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Brake And Clutch Cam (Cable Type)(#10001-21016)

01***30	Bolt,(For France Noise Suppression)	6
01***30	Bolt,Radio Controlled Slag Handling	4
01***60	Bolt, Trunnion Cap	1
01***60	Bolt,(Except Pll)	2

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Control Lever (Cable Type)(#10001-21016)

01***25	Bolt - Rear Guard Mounting	3
01***45	Bolt,(Cold Terrain Spec.)	2
01***60	Bolt, Trunnion Cap	1
01***35	Bolt,(For Pedal Steering)	2

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Control Lever(#10001-10010)

01***35	Bolt	2
01***40	Bolt	3
01***25	Bolt,(For Ripper)	3
01***45	Bolt	2

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Control Valve

01***35	Bolt - Torque Converter Totransmission Mounting	6
01***30	Bolt,(For Center Guard)	3
01***30	Bolt	3
01***60	Bolt	1

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Cylinder Stay

Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Drum L.H. (Cable Type)(#10001-21016)

01***16	Bolt	6
01***25	Bolt,(Sandy? Dusty Terrain Spec.)	6
01***16	Bolt	18
01***20	Bolt	6

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Drum R.H. (Cable Type)(#10001-21016)

01***16	Bolt	6
01***25	Bolt,(Sandy? Dusty Terrain Spec.)	6
01***16	Bolt	18
01***20	Bolt	6

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Housing And Cover (Cable Type)(#10001-21016)

01***16	Bolt	16
01***20	Bolt	2
01***16	Bolt,(For Slag Handling)	16
01***20	Bolt,(Sandy? Dusty Terrain Spec.)	2

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Hydraulic Cylinder

01***35	Bolt	1
01***35	Bolt,(Without Auto Priming System)	1
01***40	Bolt,(Dust And Dirt Protection)	4
01***45	Bolt,(Cold Terrain Spec.)	1

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Hydraulic Filter

01***25	Bolt,(Sandy? Dusty Terrain Spec.)	4
01***30	Bolt,Radio Controlled Slag Handling	2
01***25	Stud	2
01***10	Nut,(Dust?Drip Proof? Trimming S.)	2

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Hydraulic Piping (1/2)

01***22	Bolt	4
01***25	Bolt,(Sandy? Dusty Terrain Spec.)	4
01***45	Bolt,(For Suction? Reversible Fan)	4
01***70	Bolt, Spacer	2

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Hydraulic Piping (2/2)

01***16	Bolt	7
01***30	Bolt	48
01***16	Bolt,(For Slag Handling)	8
01***30	Bolt,(Cold Terrain Spec.)	48

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Hydraulic Pump(#10001-18438)

01***45	Bolt,(Cold Terrain Spec.)	4
01***45	Bolt	4
01***35	Washer	16
01***36	Washer,Radio Controlled Slag Handling	4

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Hydraulic Pump(#18439-)

01***45	Bolt,(Cold Terrain Spec.)	4
01***36	Washer,Radio Controlled Slag Handling	4
01***42	Washer,Spring (For Pedal Steering)	16
04***20	Ring, Snap	1

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Hydraulic Tank

01***18	Bolt (Op)	5
01***25	Bolt,(Sandy? Dusty Terrain Spec.)	40
01***35	Bolt, Mounting - Flywheel Housing End	1
01***30	Bolt,Radio Controlled Slag Handling	2

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Hydraulic Tank (2-Spool Vavle)

01***18	Bolt (Op)	3
01***25	Bolt,(Sandy? Dusty Terrain Spec.)	40
01***35	Bolt, Mounting - Flywheel Housing End	2
01***25	Bolt - Rear Guard Mounting	4

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Input Shaft And Gear (Cable Type)(#10001-21016)

01***20	Bolt	2
01***20	Bolt,(Used When Towing Winch)	2
01***30	Bolt,Radio Controlled Slag Handling	4
01***20	Bolt	2

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Make Up Valve

01***35	Bolt - Torque Converter Totransmission Mounting	4
01***10	Screw	4
01***00	Bolt	4
01***10	Bolt	4

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Power Take Off Shaft (Cable Type)(#10001-10010)

01***40	Bolt	16
01***10	Nut	16
01***13	Nut	2
01***36	Washer,Radio Controlled Slag Handling	16

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Power Take Off Shaft (Cable Type)(#10011-21016)

01***50	Bolt	16
01***13	Nut	2
01***13	Nut	2
01***30	Washer,Spring(Sandy?Dusty Terrain S.)	16

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Relief Valve

01***00	Bolt (M12-1.75x100)	4
01***36	Washer,Radio Controlled Slag Handling	4
07***45	O-Ring,(F4350-60a0 -9 )	2
15***70	Relief Valve Ass'Y	1

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Return Spring Case

01***25	Bolt - Rear Guard Mounting	1
01***35	Bolt - Torque Converter Totransmission Mounting	3
01***36	Washer,Radio Controlled Slag Handling	4
04***20	Ring, Retaining	3

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Sheave (Cable Type)(#10001-21016)

01***20	Bolt	2
01***25	Bolt	2
01***20	Bolt,(Sandy? Dusty Terrain Spec.)	2
01***35	Bolt - Torque Converter Totransmission Mounting	4

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Sheave And Cable (Cable Type)(#10001-21016)

01***20	Bolt,(Used When Towing Winch)	2
01***30	Bolt,Radio Controlled Slag Handling	8
01***35	Bolt - Torque Converter Totransmission Mounting	2
01***65	Bolt (M12-1.75x65)	2

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Tilt Blade And Straight Blade(#15478-)

01***30	Bolt,(For Center Guard)	4
01***35	Bolt,(For Pedal Steering)	2
01***40	Bolt,(Not Used With Cab)	48
01***45	Bolt	12

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Tilt Blade(#10001-15477)

01***35	Bolt - Torque Converter Totransmission Mounting	2
01***45	Bolt	6
01***85	Bolt	8
01***60	Screw	2

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Tilt Cylinder(#10001-15477)

01***20	Bolt,(Large Capacity Type) (Std)	2
01***25	Bolt - Rear Guard Mounting	10
01***40	Bolt,(Dust And Dirt Protection)	4
01***45	Bolt, Mount Center Hinge Retainer (Lower)	4

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Tilt Cylinder(#15478-)

01***25	Bolt,(Without Auto Priming System)	4
01***25	Bolt - Rear Guard Mounting	5
01***30	Bolt,Radio Controlled Slag Handling	2
01***55	Bolt	2

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Tilt Pedal(#10001-.)

01***35	Bolt, Mounting - Flywheel Housing End	1
01***25	Bolt - Rear Guard Mounting	5
01***40	Bolt,(Dust And Dirt Protection)	4
01***45	Bolt,(Cold Terrain Spec.)	1

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Komatsu : D80a-12(S/N 10001-Up) : Work Equipment And Its Control System : Tilt Piping

01***20	Bolt,(Large Capacity Type) (Std)	3
01***25	Bolt,(Sandy? Dusty Terrain Spec.)	2
01***45	Bolt,(For Suction? Reversible Fan)	4
01***50	Bolt	4

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Frequently asked questions

What engine powers the Komatsu D80A-12 (S/N 10001-up)?

A Cummins NH-220-CI (Komatsu factory designation), a mechanical, naturally aspirated inline-six diesel of 12.17 L displacement rated at 134 kW (180 hp) at 1850 rpm. There is no ECM; the engine runs on mechanical fuel injection with analog gauges only.

What is the operating weight of the Komatsu D80A-12?

About 21,550 kg (47,510 lb) in standard S-blade configuration (3.63 m blade width, 5.96 m3 capacity). Weight varies with blade type (S, U, angle) and ripper attachment.

What replaced the Komatsu D80A-12?

The D80A-12 (S/N 10001-up) was succeeded by the D80A-18 (S/N 25001-up), which moved to a different engine generation on the same D80-class chassis. Related electric-shift and swamp/wide-track variants followed the same generational split.

What D80A-12(S/N 10001-UP) owners discuss

What powertrain quirks should owners expect from the D80A-12's Cummins NH-220 engine?

The NH-220 is a mechanical inline-six with a PT-type fuel system and no electronic engine controls, so troubleshooting is done by hand, not by fault code. Owners and mechanics say the design stays reliable as long as fuel stays clean, since the PT pump and injectors are sensitive to water and debris pulled from the tank or filters. Low fuel pressure from a weak pump, plugged filters, or air in the lines shows up as hard starting, rough idle, or flat power under load. Overheating or an improperly torqued cylinder head is the recurring cause of head gasket failure on this engine family. Because timing and governor calibration are purely mechanical, unexplained speed surges or a loss of power are usually traced to a worn camshaft, a misadjusted governor, or a sticking fuel shutoff valve. Have your dealer or a qualified diesel shop verify fuel pressure and injector timing before assuming a major rebuild is needed.

What hydraulic and steering-clutch behavior is typical on this dozer?

Steering and the main clutch draw from their own dedicated pumps rather than one shared circuit, so a drop in steering response at normal engine speed more often points to that pump or its drive than to the transmission itself. The steering clutches and brakes run in a wet, oil-bathed housing, and operators report clutch packs slipping or dragging when that housing oil picks up water or metal fines, so a scheduled drain-and-inspect catches wear before a full clutch pack teardown is needed. Sluggish blade response is more commonly traced to a worn hydraulic pump or a leaking cylinder seal than to the control valve itself. Have your dealer verify clutch pack condition and hydraulic pump output before committing to a teardown.

What undercarriage wear pattern is typical for a dozer in this weight and drive class?

As with any dozer this size, the undercarriage is the single biggest wear item and the largest line item in lifetime repair cost, commonly cited as roughly half of total repair spend even though it is a smaller share of the original purchase price. Owners watch track tension closely: over-tight tracks accelerate pin and bushing wear, while over-loose tracks invite instability and derailing, especially on side-hill grading work this class of machine is often used for. Rear drive sprocket teeth are a quick field check - pointed teeth mean the sprocket is past its wear limit, while teeth that still show a flat tip are generally still serviceable. Daily visual inspection for uneven wear, cracked links, or loose rollers is the standard practice reported by long-time operators of this dozer class.

Are there known accessory-drive quirks tied to the NH-220 installation?

Belt-driven accessories come up repeatedly in discussions of Komatsu dozers built around this Cummins engine family. After a belt change, a high-pitched squeal from a bearing can develop, and if pulley alignment or belt tension is off, a freshly installed fuel pump belt can overheat and fail within minutes, with the drive pulley getting noticeably hot to the touch. The consensus is to check belt tension and pulley alignment first after any accessory-drive service rather than assume the pump itself has failed. Have your dealer verify belt tension and pulley alignment on any accessory-drive noise before replacing the pump.

What electrical issues actually come up on this machine?

The D80A-12 predates any electronic engine or hydraulic controls, so reported electrical problems are limited to the basic starting and charging circuit rather than sensors or control modules. A charging complaint usually traces to a bad alternator showing no voltage rise above battery voltage with the engine running, a failed diode trio inside the alternator, or a loose or corroded connector at the back of the alternator. Repeat alternator failures are most often blamed on weak or sulfated batteries, excessive idling, or poor ground and terminal connections rather than a defective replacement unit. Have your dealer verify alternator output and battery condition with a load test before replacing charging components.

What should a buyer check before purchasing a used D80A-12?

Start with the undercarriage: sprocket tooth profile, link and bushing wear, and roller play, since this is the costliest system to restore. Drain and inspect the steering clutch and brake housing oil for water or metal contamination, and confirm the clutches engage and release cleanly on both sides. Listen to the engine cold and hot, check exhaust smoke color, and inspect for coolant or oil leaks and head gasket seepage. Cycle the blade through its full range and inspect hoses and cylinder rods for leaks. Load-test the charging system and confirm the starter turns the engine over briskly. Look for mismatched paint or undocumented repairs, and treat an hour meter reading that seems inconsistent with wear as a red flag. Because this is an early-1980s direct-drive machine, confirm parts support for driveline and steering-clutch components before committing to purchase, since sourcing can be tighter than for later Komatsu models. Have your dealer verify undercarriage wear limits and clutch condition as part of a pre-purchase inspection.

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

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