Komatsuengine(no series)

Komatsu SA8V170-1C(S/N 10040-UP)

Maintenance schedule, common problems & OEM parts breakdown

The Komatsu SA8V170-1C (S/N 10040-UP) is a heavy-duty diesel engine utilized in Komatsu's 170-series construction equipment, including the PC170LC excavator and WA800 wheel loader. This engine belongs to the SA8V170 series, succeeding the SA8V170-1A (S/N 10001-UP) and SA8V170-1B (S/N 10007-UP) variants. It is a six-cylinder, turbocharged, aftercooled diesel engine designed for high torque and durability in earthmoving applications. The machine class typically falls within the 20-ton excavator or heavy wheel loader category, with operating weights varying by configuration and attachment package. Production years for this specific serial range correspond to the mid-generation update of the 170-series line, bridging the gap between earlier Tier 2/3 models and later Tier 4 Final emissions-compliant units.

Across the SA8V170 series generations, the primary changes involved emissions compliance upgrades, fuel injection system refinements, and structural modifications to the cylinder head and cooling systems. The SA8V170-1C variant specifically addresses the transition to stricter environmental standards while maintaining the robust mechanical architecture of its predecessors. In the used and parts market, the SA8V170-1C remains significant due to its widespread installation in the PC170LC and WA800 fleets, which are still active in heavy construction and mining. Its modular design and commonality with other 170-series engines ensure a steady supply of aftermarket and genuine parts, making it a cost-effective powerplant for fleet maintenance and long-term operational viability.

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 SA8V170-1C(S/N 10040-UP) specifications

Engine

ModelSA8V170-1C
Series/GenerationSA8V170-1 Series
Configuration8 cylinder, in-line, turbocharged diesel
Displacement23.2 liter (1,415.8 cu in)
Bore170.0 mm (6.69 in)
Stroke170.0 mm (6.69 in)
Gross Power391 kW (524 hp) @ 1800 rpm
Net Power391 kW (524 hp) @ 1800 rpm
Torque2650 Nm (1954 lbf-ft) @ 1300 rpm
Emissions TierNot documented for this exact serial range — verify with your dealer

Weights

Engine Weight2740 kg (6040 lb)

Dimensions

Length1860 mm (73.2 in)
Width1240 mm (48.8 in)
Height2093 mm (82.4 in)

Performance

Travel SpeedsNot documented for this exact serial range — verify with your dealer
GradeabilityNot documented for this exact serial range — verify with your dealer

Service capacities (summary)

Fuel TankNot documented for this exact serial range — verify with your dealer
Hydraulic SystemNot documented for this exact serial range — verify with your dealer
Engine OilNot documented for this exact serial range — verify with your dealer
Cooling SystemNot documented for this exact serial range — verify with your dealer

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

Komatsu SA8V170-1C(S/N 10040-UP) maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level and condition.
  • Check hydraulic fluid level at sight glass.
  • Check coolant level and ensure cap is secure.
  • Drain water from fuel separator.
  • Check DEF level.
  • Check air filter restriction indicator.
Every 250 h
  • Change engine oil and filter.
  • Grease all points (boom, stick, bucket, swing bearing).
  • Check hydraulic oil level.
  • Inspect air cleaner outer element.
  • Inspect belts, hoses, and clamps.
  • Check track tension and shoe/pad condition.
Every 500 h
  • Replace fuel filter.
  • Replace hydraulic return filter.
  • Perform KOWA oil sample.
  • Test coolant SCA.
  • Load test battery.
  • Measure undercarriage wear.
Every 1,000 h
  • Change hydraulic oil.
  • Change final drive oil (both sides).
  • Inspect turbocharger.
  • Check valve adjustment.
  • Inspect structural welds.
  • Clean or replace air filter outer element.
Every 2,000 h
  • Flush and replace coolant.
  • Change transmission oil and filter.
  • Replace hydraulic hoses.
  • Comprehensive component evaluation.
  • Check KDPF (at 4,500 hours).
  • Torque ROPS bolts.

Servicing the SA8V170-1C(S/N 10040-UP) beyond the schedule

Predictive Maintenance & Fluid Analysis

Utilize KOWA (Komatsu Oil Wear Analysis) at every 500-hour interval to monitor engine oil wear metals (iron, copper, lead, aluminum), coolant pH, and hydraulic fluid particle count. Track DEF levels daily to ensure Tier 4 Final SCR system efficiency. Analyze fuel dilution and soot levels in engine oil to predict injector or piston ring wear. Monitor coolant SCA concentration to prevent cavitation and corrosion in the SA8V170-1C's aluminum components. Early detection of silicon (dirt) or sodium (coolant) contamination in oil samples allows for proactive intervention before catastrophic engine failure occurs.

Corrective & Common Repairs

Address common SA8V170-1C issues such as turbocharger boost pressure leaks and EGR cooler clogging by inspecting intake manifolds and aftercoolers during 1,000-hour services. Replace worn hydraulic hoses and seals to prevent pressure drops in the main control valve system. Repair intermittent starting or shutdown faults by checking engine controller power circuits and sensor wiring. Inspect and replace worn track rollers, idlers, and sprockets to maintain undercarriage alignment and reduce drivetrain strain. Fix hydraulic leaks at cylinder rod seals and pump shafts to maintain operational efficiency and prevent fluid loss.

Overhaul & Rebuild Points

Plan for major engine overhaul at 10,000-15,000 hours, focusing on piston ring replacement, cylinder liner honing, and valve seat grinding. Inspect the crankshaft for wear and replace bearings if clearance exceeds specifications. Rebuild the hydraulic pump and control valves when flow rates drop below 90% of original capacity or internal leakage is detected. Overhaul the final drives and travel motors when gear backlash increases or seal failures cause oil contamination. Replace the turbocharger if shaft play or bearing noise indicates imminent failure, ensuring optimal air intake for the SA8V170-1C's combustion efficiency.

Seasonal & Environment Servicing

In cold climates, use low-temperature Komatsu Genuine Lubricants and ensure DEF fluid is protected from freezing. Check battery hold-downs and terminals for corrosion due to moisture exposure. In dusty environments, clean radiator and oil cooler fins daily to prevent overheating and replace air filter elements more frequently. In high-humidity or coastal areas, inspect electrical connectors for corrosion and apply dielectric grease. Drain water from the fuel separator daily to prevent microbial growth and fuel line blockages. Adjust track tension according to ground conditions to minimize undercarriage wear and improve machine stability.

SA8V170-1C(S/N 10040-UP) common service parts

Part numberPart
07281-00197Clamp,(With Pre-Fuel Filter)Check fitment →
6164-71-6500Fuel Filter Ass'YCheck fitment →
07002-03334O-Ring, At Transmission FilterCheck fitment →
6165-61-2310ElementCheck fitment →
6165-61-2330ElementCheck fitment →

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

SA8V170-1C(S/N 10040-UP) fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
CA115Engine crankshaft speed sensor failureBroken sensor, wiring issue, or connector corrosionReplace the speed sensor and verify the voltage at the pin connector
CA111Internal engine controller faultECM hardware failureReplace or reprogram the ECM
CA122Intake air pressure sensor feedback voltage too highSensor malfunction or wiring issueVerify the intake pressure sensor and wiring
CA123Intake air pressure sensor feedback voltage too lowSensor short or airflow restrictionCheck for a sensor short or an airflow restriction
CA451Common rail pressure sensor feedback value too highFuel rail pressure sensor malfunction or actual overpressureDiagnose the fuel rail pressure sensor or pump lines
CA452Common rail pressure sensor feedback value too lowFuel rail pressure sensor malfunction or low pressure conditionDiagnose the fuel rail pressure sensor or pump lines
CA234Engine overspeedThrottle calibration error, engine load cycle issue, or operator misuseVerify throttle calibration, engine load cycle, or operator misuse
CA441Battery voltage too lowAlternator failure, battery failure, or voltage regulator issueReplace the alternator or battery; check the voltage regulator
CA442Battery voltage too highAlternator failure or voltage regulator issueReplace the alternator or battery; check the voltage regulator
AA10NXAir cleaner cloggingDirty or blocked air filter elementReplace the air filter

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

SA8V170-1C(S/N 10040-UP) attachments & work tools

Engine Identification & Series

The SA8V170-1C engine is designated for serial numbers 10040 and up. It is distinct from the SA8V170-1A (S/N 10001-10318) and SA8V170-1B (S/N 10007-Up) variants. The engine is an 8-cylinder, turbocharged diesel used in Komatsu heavy equipment such as the WA800-1 wheel loader.

Work Tool Families

Compatible work tools include standard shovel buckets, heavy-duty rock buckets, and specialized attachments for wheel loaders. For the WA800-1 class, typical bucket capacities range from 3.0 to 4.2 cubic yards. Specific bucket sizes vary by configuration and series.

Coupler & Mounting Systems

Attachments utilize standard wheel loader mounting interfaces. Compatibility requires verification against the specific machine model (e.g., WA800-1) rather than the engine code alone. Quick coupler options are available but depend on the factory-installed hydraulic circuit.

Hydraulic Kit Requirements

Auxiliary hydraulic tools require a factory-installed auxiliary hydraulic kit. The engine's hydraulic output must match the tool's flow and pressure requirements. Specific kit part numbers are not documented in the provided sources; verify with the dealer.

Factory Configurations & Guarding

Factory options include ROPS/FOPS cabs and standard lighting packages. Guarding for the engine compartment and hydraulic lines is standard for the WA800-1 series. Emissions configurations vary by region and model year.

All SA8V170-1C(S/N 10040-UP) assemblies by section

Every catalogued assembly group for the Komatsu SA8V170-1C(S/N 10040-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Accessory
Komatsu : Sa8v170-1c(S/N 10040-Up) : Accessory : Air Compressor And Mounting
01***30Bolt,(For France Noise Suppression)8
01***35Bolt, Mounting - Flywheel Housing End1
01***35Bolt - Torque Converter Totransmission Mounting4
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Accessory : Air Compressor Piping(#10040-10292)
01***25Bolt,(Sandy? Dusty Terrain Spec.)1
01***30Bolt,(For France Noise Suppression)1
01***40Bolt,(Dust And Dirt Protection)1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Accessory : Air Compressor Piping(#10293-)
01***35Bolt,(Without Auto Priming System)1
01***16Bolt,(Sandy And Dusty Spec.)1
01***25Bolt,(Sandy? Dusty Terrain Spec.)1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Accessory : Air Compressor(#10040-10292)
Komatsu : Sa8v170-1c(S/N 10040-Up) : Accessory : Air Compressor(#10293-10436)
61***05Air Compressor Ass'Y1
DK***20Connecting Rod A2
DK***90Washer,Air Compressor2
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Accessory : Air Compressor(#10437-)
61***05Air Compressor Ass'Y1
DK***90Washer,Air Compressor2
DK***00Bearing1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Accessory : Front Accessory Drive
01***30Bolt,(For France Noise Suppression)8
01***30Washer,Spring(Sandy?Dusty Terrain S.)8
04***30Seal, Dust1
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Cooling System
Komatsu : Sa8v170-1c(S/N 10040-Up) : Cooling System : Cooling Fan And Fan Drive
01***35Bolt - Torque Converter Totransmission Mounting6
01***60Bolt, Trunnion Cap6
01***35Bolt,(For Pedal Steering)2
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cooling System : Corrosion Resistor
01***40Bolt,(Dust And Dirt Protection)2
01***10Nut,(Fig.F2820-01a3-12)1
01***30Washer,Spring(Sandy?Dusty Terrain S.)2
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cooling System : Tension Pulley And Mounting
01***20Bolt,(Sandy? Dusty Terrain Spec.)2
01***40Bolt,(Dust And Dirt Protection)1
01***45Bolt (M12-1.75x45)1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cooling System : Water Pump And Mounting
01***30Bolt,(For France Noise Suppression)12
01***35Bolt, Mounting - Flywheel Housing End2
01***30Washer,Spring(Sandy?Dusty Terrain S.)14
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Cylinder Block
Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Camshaft And Cam Follower(#10040-10250)
01***40Bolt,(Dust And Dirt Protection)16
01***32Washer,(Not Used With Emergency Str.)16
04***38Key1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Camshaft And Cam Follower(#10251-)
01***40Bolt,(Dust And Dirt Protection)16
01***32Washer,(Not Used With Emergency Str.)16
04***38Key1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Crankshaft
01***00Bolt (M12-1.75x100)6
01***90Bolt1
01***36Washer,Radio Controlled Slag Handling6
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Cylinder Block Cover(#10040-10394)
01***30Bolt,(Cold Terrain Spec.)1
01***16Bolt,(Sandy And Dusty Spec.)11
01***25Bolt,(Sandy? Dusty Terrain Spec.)51
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Cylinder Block Cover(#10395-10442)
01***30Bolt,(Cold Terrain Spec.)1
01***16Bolt,(Sandy And Dusty Spec.)11
01***25Bolt,(Sandy? Dusty Terrain Spec.)49
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Cylinder Block Cover(#10443-)
01***30Bolt,(Cold Terrain Spec.)1
01***16Bolt,(Sandy And Dusty Spec.)11
01***25Bolt,(Sandy? Dusty Terrain Spec.)56
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Cylinder Block(#10040-10515)
01***18Bolt8
01***20Bolt,(Large Capacity Type) (Std)1
01***25Bolt,(Sandy? Dusty Terrain Spec.)4
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Cylinder Block(#10516-)
01***18Bolt8
01***25Bolt,(Sandy? Dusty Terrain Spec.)6
01***30Bolt,(For France Noise Suppression)2
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Flywheel And Flywheel Housing(#10040-10252)
01***20Bolt,(Sandy? Dusty Terrain Spec.)14
01***25Bolt,(Without Auto Priming System)1
01***30Bolt,(For France Noise Suppression)3
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Flywheel And Flywheel Housing(#10253-)
01***20Bolt,(Sandy? Dusty Terrain Spec.)10
01***25Bolt,(Without Auto Priming System)1
01***30Bolt,(For France Noise Suppression)3
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Gear Case And Cover(#10040-10252)
01***20Bolt,(Large Capacity Type) (Std)2
01***90Bolt,For Reversible Fan12
01***55Screw7
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Gear Case And Cover(#10253-)
01***20Bolt,(Large Capacity Type) (Std)2
01***90Bolt,For Reversible Fan12
01***55Screw7
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Muffler Support
01***45Bolt,(Cold Terrain Spec.)10
01***05Bolt4
01***05Bolt4
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Oil Pan(#10040-10515)
01***30Bolt,(For France Noise Suppression)2
01***35Bolt, Mounting - Flywheel Housing End54
01***80Bolt, Mount Strainer Flange2
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Oil Pan(#10516-)
01***30Bolt,(For France Noise Suppression)2
01***35Bolt, Mounting - Flywheel Housing End53
01***80Bolt, Mount Strainer Flange2
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Piston And Connecting Rod
02***13Pin, Dowel2
61***60Piston Ring Ass'Y, Per Cylinder8
61***10Pin,Piston8
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Block : Timing Gear
01***20Bolt,(Sandy? Dusty Terrain Spec.)4
01***35Bolt,(Without Auto Priming System)6
01***25Bolt,(Sandy? Dusty Terrain Spec.)5
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Cylinder Head
Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Air Cleaner And Mounting
01***08Nut, Regular Hexagon (M10-1.50)16
01***30Washer,Spring(Sandy?Dusty Terrain S.)16
07***79Clamp,(Except Japan)8
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Air Intake Manifold And After Cooler
01***25Bolt,(Sandy? Dusty Terrain Spec.)32
01***35Bolt, Mounting - Flywheel Housing End3
01***75Bolt,(For D57sr)2
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Cylinder Head(#10040-10301)
07***28O-Ring,(For Transmission Screen)2
07***08Plug (Kit)5
07***11Plug,(For Shipping)1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Cylinder Head(#10302-)
07***28O-Ring,(For Transmission Screen)2
07***08Plug (Kit)4
07***11Plug,(For Shipping)1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Exhaust Manifold And Turbocharger
01***25Bolt,(Sandy? Dusty Terrain Spec.)16
01***35Bolt, M10x1.5x354
01***45Capscrew4
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Exhaust Manifold Cover (1/2)
01***16Bolt,(Sandy And Dusty Spec.)6
01***20Bolt,(Large Capacity Type) (Std)31
01***25Bolt,(Sandy? Dusty Terrain Spec.)13
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Exhaust Manifold Cover (2/2)
01***20Bolt,(Large Capacity Type) (Std)28
01***25Bolt,(Sandy? Dusty Terrain Spec.)4
01***20Capscrew - M103
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Muffler And Connection
01***16Bolt,(Sandy And Dusty Spec.)14
01***25Bolt,(Sandy? Dusty Terrain Spec.)6
01***30Bolt,(For France Noise Suppression)7
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Rocker Arm And Housing
01***45Bolt,(Cold Terrain Spec.)8
01***55Bolt,(For France Noise Suppression)8
01***90Bolt,For Reversible Fan48
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Rocker Arm Housing Cover
01***55Bolt,(For Suction? Reversible Fan)40
01***30Washer,Spring(Sandy?Dusty Terrain S.)40
01***16Washer,(With Shoe Slip Control)40
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Tubrocharger(#10437-)
01***16Bolt,(For Slag Handling)4
01***16Bolt8
04***08Pin, Dowel1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Turbocharger(#10040-10292)
01***16Bolt,(For Slag Handling)4
01***16Bolt8
01***16Bolt8
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Turbocharger(#10293-10436)
01***16Bolt,(For Slag Handling)4
01***16Bolt8
04***08Pin, Dowel1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Water Line Air Vent Piping(#10040-10515)
01***40Bolt,(Dust And Dirt Protection)3
01***30Washer,Spring(Sandy?Dusty Terrain S.)3
01***16Washer,(With Shoe Slip Control)1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Water Line Air Vent Piping(#10516-)
01***40Bolt,(Dust And Dirt Protection)3
01***30Washer,Spring(Sandy?Dusty Terrain S.)3
01***16Washer,(With Shoe Slip Control)1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Water Manifold And Thermostat
01***25Bolt,(Sandy? Dusty Terrain Spec.)9
01***30Bolt,(For France Noise Suppression)10
01***95Bolt,(For Reversible Fan)6
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Water Piping (1/2)
01***20Bolt,(Large Capacity Type) (Std)2
01***30Bolt,(For France Noise Suppression)6
01***35Bolt, Mounting - Flywheel Housing End6
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Cylinder Head : Water Piping (2/2)
01***16Bolt,(For Slag Handling)2
01***20Bolt,(Sandy? Dusty Terrain Spec.)2
01***25Bolt,(Without Auto Priming System)2
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Electrical System
Komatsu : Sa8v170-1c(S/N 10040-Up) : Electrical System : Alternator (50a) (Except Japan)
60***80Alternator A. (50a)1
SD***10Heat Sink Ass'Y(-)2
SD***00O-Ring1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Electrical System : Alternator And Mounting
01***10Bolt, Mount Filler Tube1
01***20Bolt2
01***35Bolt,(Cold Weather Spec.)1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Electrical System : Alternator Drive
01***30Bolt,(For France Noise Suppression)8
01***30Washer,Spring(Sandy?Dusty Terrain S.)8
04***30Seal, Dust1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Electrical System : Starting Motor (11kw)
60***40Starting Motor A.,(11kw)2
60***41Starting Motor A.,(11kw)2
SD***X0Pinion Clutch Ass'Y1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Electrical System : Starting Motor And Mounting
01***45Bolt,(For Slag Handling)6
01***30Bolt - Lower Oil Cooler Outlet Tubemounting2
01***48Washer,Spring? Single Flange6
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Fuel System
Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Auto Priming System (1/3)(#10040-10261)
01***20Bolt,(Large Capacity Type) (Std)1
01***25Bolt,(Sandy? Dusty Terrain Spec.)1
01***30Bolt,(For France Noise Suppression)3
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Auto Priming System (1/3)(#10262-10432)
01***20Bolt,(Large Capacity Type) (Std)1
01***25Bolt,(Sandy? Dusty Terrain Spec.)1
01***30Bolt,(For France Noise Suppression)3
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Auto Priming System (1/3)(#10433-)
01***20Bolt,(Large Capacity Type) (Std)1
01***25Bolt,(Sandy? Dusty Terrain Spec.)1
01***30Bolt,(For France Noise Suppression)3
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Auto Priming System (2/3)(#10040-10261)
01***16Bolt,(For Slag Handling)2
01***16Bolt,(Sandy And Dusty Spec.)2
01***20Bolt,(Large Capacity Type) (Std)5
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Auto Priming System (2/3)(#10262-10432)
01***16Bolt,(For Slag Handling)2
01***16Bolt,(Sandy And Dusty Spec.)2
01***20Bolt,(Large Capacity Type) (Std)5
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Auto Priming System (2/3)(#10433-)
01***16Bolt,(Sandy And Dusty Spec.)2
01***20Bolt,(Large Capacity Type) (Std)3
01***25Bolt,(Sandy? Dusty Terrain Spec.)4
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Auto Priming System (3/3)(#10040-10432)
01***20Bolt,(Sandy? Dusty Terrain Spec.)1
01***50Bolt,(For Trimming Dozer)1
01***20Bolt,(Large Capacity Type) (Std)2
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Auto Priming System (3/3)(#10433-)
01***20Bolt,(Sandy? Dusty Terrain Spec.)1
01***50Bolt,(For Trimming Dozer)1
01***20Bolt,(Large Capacity Type) (Std)2
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Automatic Timer
61***40Timer Ass'Y1
DK***50Shim? 0.6mm0
DK***20Flyweight2
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Control Linkage(#10040-10246)
01***12Bolt,(Without R.P.C.U.)1
01***16Bolt (Welded)2
01***30Bolt,(Cold Terrain Spec.)2
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Control Linkage(#10247-)
01***16Bolt (Welded)2
01***16Bolt,(For Slag Handling)2
01***35Bolt,(Without Auto Priming System)2
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Feed Pump
61***00Fuel Pump Ass'Y1
EB***27Valve1
EB***16Cover1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Filter And Piping
01***20Bolt,(Large Capacity Type) (Std)1
01***25Bolt,(Sandy? Dusty Terrain Spec.)6
01***30Bolt,(For France Noise Suppression)1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#10040-10515)
DK***20Shim? 0.05mm0
DK***00Bolt1
DK***20Link1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#10516-)
DK***20Shim? 0.05mm0
DK***20Link1
DK***00Nut1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#10040-10515)
DK***80Shim? 0.5mm0
DK***00Bolt1
DK***20Cover1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#10516-)
DK***80Shim? 0.5mm0
DK***40Gasket,Air Compressor2
DK***20Spring,Governor1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2)(#10040-10515)
61***10Injection Pump Ass'Y,(See Fig.0451)1
61***11Injection Pump Ass'Y1
DK***00Screw8
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2)(#10516-)
61***11Injection Pump Ass'Y1
DK***70Seal,Oil1
DK***00Gear1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2)(#10040-10515)
DK***00Bolt1
DK***00Screw8
DK***20Valve,Delivery8
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2)(#10516-)
DK***00Screw8
DK***20Valve,Delivery8
DK***20Tappet8
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Injection Pump And Piping (1/2)
01***30Bolt5
01***35Bolt3
01***35Bolt,(Without Auto Priming System)3
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Injection Pump And Piping (2/2)
01***30Bolt16
01***16Bolt,(For Slag Handling)2
01***20Bolt,(Large Capacity Type) (Std)7
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Injection Pump Drive
Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Nozzle And Spill Pipe
61***10Holder Ass'Y1
61***01Nozzle Holder Ass'Y8
61***21Nozzle1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Pump Drive And Feed Pump
01***20Bolt,(Sandy? Dusty Terrain Spec.)2
01***20Bolt,(Large Capacity Type) (Std)2
01***25Bolt,(Sandy? Dusty Terrain Spec.)4
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Fuel System : Fuel Return Piping
01***16Bolt,(For Slag Handling)6
01***20Bolt,(Large Capacity Type) (Std)1
01***30Bolt,(For France Noise Suppression)1
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Lubricating Oil System
Komatsu : Sa8v170-1c(S/N 10040-Up) : Lubricating Oil System : Lubricating Cooling Valve
01***25Bolt,(Sandy? Dusty Terrain Spec.)1
01***30Washer,Spring(Sandy?Dusty Terrain S.)1
07***40O-Ring,Cooling Valve1
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Lubricating Oil System : Lubricating Oil Cooler
01***20Bolt,(Sandy? Dusty Terrain Spec.)4
01***25Bolt,(Without Auto Priming System)6
01***50Bolt,(For Trimming Dozer)4
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Lubricating Oil System : Lubricating Oil Filter
01***30Bolt,Radio Controlled Slag Handling4
01***35Bolt - Torque Converter Totransmission Mounting2
01***40Bolt,(Dust And Dirt Protection)6
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Lubricating Oil System : Lubricating Oil Piping
01***50Bolt,(For Trimming Dozer)4
01***25Bolt,(Sandy? Dusty Terrain Spec.)2
01***35Bolt, Mounting - Flywheel Housing End2
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Lubricating Oil System : Lubricating Oil Pump And Suction Pipe
01***25Bolt,(Sandy? Dusty Terrain Spec.)5
01***30Bolt,(For France Noise Suppression)10
01***35Bolt, Mounting - Flywheel Housing End3
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Lubricating Oil System : Lubricating Safety Valve
01***20Bolt,(Sandy? Dusty Terrain Spec.)2
01***25Washer,Spring?(Sandy And Dusty Spec.)2
61***40Shim Ass'Y,(Not Shown)4
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Lubricating Oil System : Mechanical Pump And Piping
01***16Bolt (Welded)6
01***16Bolt,(For Slag Handling)2
01***19Washer,(Not Used With Ventilator)6
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Komatsu : Sa8v170-1c(S/N 10040-Up) : Lubricating Oil System : Turbocharger Lubricating Oil Piping
01***16Bolt,(For Slag Handling)10
01***30Bolt,(Cold Terrain Spec.)1
01***20Bolt,(Large Capacity Type) (Std)4
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Tool And Kit
Komatsu : Sa8v170-1c(S/N 10040-Up) : Tool And Kit : Gasket Kit
01***12Washer,(F2320-63a2 -13 )1
02***75O-Ring,(For Japan) (K1)8
04***12Lock (K2)1
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SA8V170-1C(S/N 10040-UP) serial number reference

The PIN plate is typically located on the emissions/export plate riveted near the engine bay or behind the cab on export-market machines built since approximately 2003. The 3-character prefix is the first three characters of the 17-character ISO PIN (e.g., KMT), identifying the manufacturer (Komatsu).

PrefixIdentifies
SA8V170-1CEngine

Frequently asked questions

What engine does the Komatsu SA8V170-1C use?

The Komatsu SA8V170-1C is a six-cylinder, turbocharged, aftercooled diesel engine. It is part of the SA8V170 series, designed for heavy-duty construction applications with high torque output and durability.

What is the operating weight of the Komatsu SA8V170-1C machine?

The operating weight varies by configuration and series. For the PC170LC excavator class, it typically ranges from 17,000 to 19,000 kg (37,480 to 41,885 lbs). For the WA800 wheel loader class, it can exceed 86,800 kg (191,360 lbs). Exact weight depends on attachment, counterweight, and track shoe configuration.

What replaced the Komatsu SA8V170-1C?

The SA8V170-1C was succeeded by later generations of the SA8V170 series and eventually by SAA6D140E and SAA6D107E engines in newer Tier 4 Final/Stage V compliant machines. The specific successor depends on the equipment model (e.g., PC170LC-11 or WA800-8) and regional emissions requirements.

What SA8V170-1C(S/N 10040-UP) owners discuss

What are the typical powertrain and hydraulic behaviors associated with the Komatsu SA8V170-1C engine series?
The SA8V170-1C engine is characterized by high fuel efficiency and smooth operation. Community consensus indicates that Komatsu hydraulic systems are generally reliable but sensitive to oil viscosity changes. A common diagnostic pattern is that hydraulic functions work normally when cold but become weak as the oil warms, indicating internal leakage in the pump, main control valve, or cylinders. If all functions slow simultaneously, the issue is likely shared (oil level, filters, or engine speed) rather than a single component failure. The engine is designed to maintain power under load, but excessive hydraulic load can drag engine RPM down if the system is restricted or the engine is derating due to air/fuel issues.
What undercarriage and wear patterns are typical for machines powered by this engine series?
Operators report that Komatsu undercarriage components, including bushings, bearings, and track pads, are subjected to significant wear and tear, particularly in dusty or abrasive environments. Worn bushings can lead to increased noise and vibration, while worn bearings may cause premature failure of the tracks. The line is sometimes described as having components that wear out together; if one major hydraulic component fails, the engine may be near the end of its service life, affecting resale value. Regular inspection of track tension and roller condition is critical to prevent uneven wear and track loosening.
What are the known quirks or common issues with the SA8V170-1C engine per the series?
Common engine issues include overheating during heavy excavation, often caused by debris packed between the radiator, hydraulic oil cooler, and charge-air cooler. Loss of power under load is frequently traced to air filter restriction, fuel filter clogging, or fuel tank venting issues rather than internal engine failure. Intermittent starting and random shutdowns are often linked to unstable power supplies or faulty sensors rather than the engine itself. The engine is sensitive to fuel quality; water in the fuel or poor fuel can lead to injector wear and performance loss. Black smoke from the exhaust is a noted symptom of airflow restriction or injector issues.
What are the common electrical and sensor issues reported for this machine type?
Komatsu machines rely heavily on electronic control systems, meaning a single faulty sensor or unstable power supply can trigger multiple warning signals. Common electrical issues include intermittent starting, dashboard failures, and random shutdowns. Specific sensor errors often involve the coolant temperature sensor, intake air temperature sensor, and rail pressure sensor. Fault codes related to the ECM (Engine Control Module) internal failure or datalink timeouts are also reported. Ensuring stable battery voltage and clean grounds is essential to prevent erratic sensor readings and control system faults.
What should be checked when buying a used Komatsu SA8V170-1C machine?
When evaluating a used machine with this engine, check the following: 1) Hydraulic performance cold vs. hot to detect internal leakage. 2) Engine cooling system for blockages between heat exchangers. 3) Undercarriage wear, including track tension, roller condition, and bushing play. 4) Electrical system for stable battery voltage and clean grounds. 5) Fuel system for water contamination and filter condition. 6) Look for signs of previous major repairs, as Komatsu components often wear out together. Verify the exact serial range and configuration, as specs can vary by attachment package and regional emissions requirements.
What is a critical safety-related fix to verify with a dealer for this engine series?
Verify the condition and calibration of the engine over-speed protection and derating systems. If the machine suddenly derates or exhibits erratic engine speed behavior, have your dealer verify the ECM programming, sensor inputs (particularly crankshaft and camshaft position sensors), and the integrity of the fuel control linkage. Incorrect calibration or sensor failure can lead to unsafe engine operation or failure to protect the engine from damage under load. have your dealer verify

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

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