Komatsuengine(no series)
Komatsu SA6D170-A-1C(S/N 10569-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu SA6D170-A-1C, engine S/N 10569-UP, is a bare service engine: a 23.15 L (1,413 cu in) water-cooled inline-six diesel with 170 mm x 170 mm bore and stroke. It is mechanically governed, direct-injected, and turbocharged with aftercooling, with no electronic engine control. Dealer cross-reference documentation ties this exact serial break to the Komatsu HD460-1, an early rigid-frame off-highway dump truck introduced in 1977 and noted in its day as an early adopter of automatic transmission in its payload class, across chassis blocks S/N 2001-UP and A2060-UP. Komatsu's own historical product record lists a rated payload near 46 t (50.7 US ton) for this truck; that figure is single-sourced and not independently cross-verified, and tare or gross operating weight is not documented in available sources for this early generation. The HD460-1 sits at the head of Komatsu's long-running HD-series haul-truck line, preceding the HD465-2 and the later HD465-3, HD465-5, and HD465-7 generations. The same SA6D170-A-1 engine family also served other period equipment, including a Komatsu generator set and a wheel loader, each under its own engine-serial break.
Within the HD460-1 itself, the two chassis blocks (2001-UP and A2060-UP) read as a continuous build on the same engine and configuration, not a mid-run spec change. This mechanical SA6D170 engine generation carried on through the following HD465-2 before Komatsu introduced the electronically controlled SAA6D170E several generations later, at the HD465-7 in the early 2000s. That change added an ECM, diagnostic fault codes, and a higher power band, moving the truck line out of the pre-emissions era this engine belongs to. Surviving HD460-1 trucks and spare SA6D170-A-1C engines like this one represent an early, mechanically governed, field-serviceable generation of Komatsu's haul-truck line, valued in older fleets and regions where simpler, non-electronic powertrains are easier to keep running without dealer diagnostic tools. Parts demand around this engine centers on injection pump and injector service, turbocharger and aftercooler components, and wet-liner cooling-system parts, alongside the dump-truck wear items common to a haul truck of this age: kingpins, hoist cylinders, and suspension struts.
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 SA6D170-A-1C(S/N 10569-UP) specifications
Engine
| Engine model | SA6D170-A-1C, Komatsu 6D170-series inline-six, water-cooled, direct-injection diesel |
| Aspiration / fuel system | Turbocharged with aftercooling (SA designation); mechanical, non-electronic fuel injection. Predates the later electronically controlled SAA6D170E generation used in newer machines |
| Cylinders | 6, inline |
| Bore x stroke | 170 mm x 170 mm (6.69 in x 6.69 in) |
| Displacement | 23.15 L (1,413 cu in) |
| Rated power | Not published for this exact serial range. Documented installations of the SA6D170-A-1 platform span roughly 360-520 kW (480-700 hp) depending on the host application (wheel loader, dozer, haul truck, generator set, or marine). Confirm rated output from the engine nameplate or OEM literature for the specific unit this engine serves |
| Emissions certification | Predates EPA Tier and EU Stage regulated emissions standards; mechanical PT-type fuel system, not emissions-tier certified |
Weights
| Engine dry weight | Approximately 830 kg (1,830 lb) reported for the SA6D170 engine block family. Actual weight varies with turbocharger and accessory build and is not separately confirmed for this -1C, S/N 10569-UP configuration |
| Host machine operating weight | Not applicable at the engine level. This is a bare engine listing; total operating weight depends on the host equipment (wheel loader, dozer, haul truck, or generator set) it is installed in |
Dimensions
| Engine envelope (L x W x H) | Not published for this configuration in available sources. Consult the OEM installation/outline drawing for the specific application |
| Flywheel housing | SAE No. 0 housing reported for the SA6D170-A-1 family in industrial and marine literature; verify for this exact build |
Performance
| Governed speed | Commonly listed around 2,000-2,100 rpm across SA6D170 platform variants. Exact governed speed for this configuration is application-specific and not separately confirmed |
| Governor type | Mechanical variable-speed governor reported for generator-set and marine installations of this engine family |
| Maximum torque | Not documented for this specific -1C configuration in available public sources; verify against the applicable shop manual |
Service capacities (summary)
| Engine oil (lubricating system) | Approximately 18-19 L reported for this engine family. Verify exact capacity, which can vary slightly with oil pan and filter configuration, against the shop manual for this build |
| Cooling system | Not documented for this exact configuration in available sources; verify with a dealer or the applicable shop manual |
| Fuel tank | Not applicable. This is a bare engine; fuel tank capacity is set by the host machine or generator skid it is installed in |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
SA6D170-A-1C(S/N 10569-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase, with oil filter (SA6D170-A-1C) | 61-63 L (16.1-16.6 US gal) refill, oil pan plus filter change. Figure varies slightly by pan/filter configuration. | Komatsu EO diesel engine oil. SAE10W in cold climates, SAE30 or SAE10W-30 multigrade in temperate climates, SAE40 or SAE50 in hot climates, per the ambient-temperature chart in the OMM. |
| Cooling system | Approximately 154-170 L (41-45 US gal). Reported capacity varies by generation within this engine's truck applications; confirm the exact figure against the OMM for this serial range. | Komatsu Super Coolant AF-NAC, factory pre-mixed all-season antifreeze/coolant. No separate summer/winter grade selection needed. |
| Fuel tank | Not documented for this exact serial range (10569-UP). Later generations of this truck line run roughly 590-780 L (156-206 US gal); confirm this build's tank size against the OMM or dealer. | Commercial No. 2-D diesel fuel meeting ASTM D975. Use a winter-grade or kerosene-blended fuel below freezing, per the OMM's ambient-temperature fuel table. |
| Torque converter and transmission (combined power-train circuit) | Approximately 215-250 L (57-66 US gal) combined. Reported figures vary by generation/source; confirm against the OMM for this serial range. | Komatsu TO10 power-train oil (SAE10W) in cold weather, Komatsu TO30 (SAE30) in temperate/warm weather. |
| Axle housing / differential (rear axle center section) | Approximately 45-95 L (12-25 US gal), dry fill. Reported figures vary by generation/source; confirm against the OMM. | Komatsu AXO axle (gear) oil, SAE80W, GL-4/GL-5 grade. |
| Final drives, both sides (wheel hub reduction) | Approximately 21-48.5 L (5.5-12.8 US gal) combined for both sides, depending on generation/source. Confirm the per-side fill against the OMM. | Komatsu AXO axle (gear) oil, SAE80W, same spec as the differential. |
| Hydraulic system and tank (steering and hoist circuit) | Approximately 122-220 L (32-58 US gal). Reported figures vary by generation/source; confirm the exact tank volume against the OMM. | Komatsu HO46-HM hydraulic oil (ISO VG46). Some earlier Komatsu circuits call for TO-series power-train oil instead; verify which this build specifies. |
| Grease, chassis lubrication points (spec only) | Not a fill capacity; applied per the lubrication chart interval, not a reservoir volume. | Komatsu multipurpose lithium grease, G2-LI (or low-temperature G2-LI-S in cold climates), NLGI No. 2. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu SA6D170-A-1C(S/N 10569-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the SA6D170-A-1C(S/N 10569-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
With no ECM on this mechanically governed SA6D170-A-1C, there is no telematics trend data to lean on. Oil and coolant sampling is the main early-warning tool. Send engine oil out at every 250-hour change to catch bearing wear or coolant cross-contamination before it shows on a dipstick. Test coolant corrosion-inhibitor level regularly; the wet cylinder liners are vulnerable to cavitation pitting if additive drops. Watch exhaust smoke color and idle quality as a low-tech read on injection pump and injector condition between dealer calibration checks.
Corrective & Common Repairs
Most corrective work traces to two areas: the mechanical injection pump and injectors, which lose calibration from water or grit past the fuel filters, and the turbocharger, where stretched oil-change intervals coke the feed and drain lines and starve the bearing. Expect charging-system wiring at the alternator and starter to corrode from vibration and heat over decades of service. On the host truck, pair engine repairs with a check of hoist-cylinder mounts, suspension struts, and front kingpins, typical wear points on a haul truck this age.
Overhaul & Rebuild Points
At major overhaul, inspect the wet cylinder liners for cavitation erosion on the coolant side, a known failure mode on this generation if inhibitor level lapsed, and measure liner protrusion before reinstalling. Send the injection pump out for a full bench rebuild and calibration rather than adjusting it on the engine; it carries no self-diagnostics. Rebuild the turbocharger center housing and inspect for oil-coking residue in the feed line. Because this is a bare mechanical block, rebuild scope stays simple: bearings, liners, valves, pump, and turbo.
Seasonal & Environment Servicing
In cold climates, switch to the lighter Komatsu EO viscosity grade called out on the OMM's ambient-temperature chart and run a winter-grade or kerosene-blended fuel below freezing to avoid waxing in the mechanical injection pump. In hot, dusty mine and quarry environments, the turbo aftercooler and radiator core pack with fine material on both the internal and external sides; clean them well ahead of the air-cleaner-restriction indicator's normal service point. Check coolant freeze protection and additive level each seasonal changeover, since the wet liners depend on it year-round.
SA6D170-A-1C(S/N 10569-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 600-311-8291 | Cartridge,Fuel Filter | Fuel system service | Check fitment → |
| 07000-02075 | O-Ring,Steering Oil Filter | Lubrication service | Check fitment → |
| 6127-61-2971 | O-Ring,Oil Cooler Element | Lubrication service | Check fitment → |
| 08036-01414 | Clip,(For Add.Filter)(Except Japan) | Scheduled service item | Check fitment → |
| 600-651-1250 | Element | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
SA6D170-A-1C(S/N 10569-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Engine Oil Pressure caution lamp | Engine lubricating oil pressure has dropped below the safe threshold | Low oil level, failing oil pump, clogged oil filter, or worn main/rod bearings | Stop the engine immediately, check oil level and filter, verify pressure with a mechanical gauge before restarting |
| Engine Coolant Temperature caution lamp | Engine coolant has overheated past the normal operating range | Low coolant, blocked or dirty radiator core, slipping/broken fan belt, or stuck thermostat | Idle down, do not shut off hot, let temperature drop, then check coolant level and radiator/fan once safe to inspect |
| Engine Coolant Level caution lamp | Coolant level in the surge tank/radiator has dropped below the sensor float | External leak at hoses, radiator, or water pump; internal leak past head gasket or liner seals | Check coolant level when cool, inspect for external leaks, pressure-test the cooling system if level keeps dropping |
| Torque Converter Oil Temperature caution lamp | Torque converter oil temperature has exceeded the safe limit | Low transmission/converter oil level, clogged converter oil cooler, or sustained lugging in a low gear on grade | Stop, shift to neutral, let the converter oil cool, then check fluid level and cooler for restriction |
| Retarder Oil Temperature caution lamp | Retarder (transmission-mounted) oil has overheated from extended braking use | Prolonged or continuous retarder application on long descents, low oil level, or a fouled retarder oil cooler | Release the retarder, allow the oil to cool, check oil level and cooler airflow before resuming descent braking |
| Charge (alternator) caution lamp | Charging circuit is not supplying proper voltage to the batteries | Slipping or broken alternator belt, worn brushes/regulator, or a loose or corroded charging circuit connection | Check belt tension and condition first, then test alternator output and wiring with the engine running |
| Air Cleaner Restriction indicator | Intake air filter restriction has reached the service limit | Clogged primary air filter element from dust ingestion | Service or replace the air filter element per the pop-up/indicator reading, then reset the indicator |
| Parking Brake pilot/caution lamp | Rear (driveline) parking brake is applied, or is not releasing when commanded | Normal indication when parked; if lit while attempting to move, low air/hydraulic release pressure or a brake linkage fault | Confirm brake control position, check release pressure, do not attempt to drive against an applied parking brake |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
All SA6D170-A-1C(S/N 10569-UP) assemblies by section
Every catalogued assembly group for the Komatsu SA6D170-A-1C(S/N 10569-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Accessory
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Accessory : Air Compressor And Mounting (Twin Turbocharger)(#10277-)
| 01***25 | Bolt,(Without Auto Priming System) | 6 |
| 01***40 | Bolt,(For Position Fixing) | 4 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Accessory : Air Compressor Piping (Twin Turbocharger)(#10277-)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***50 | Bolt (Kit) | 1 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Accessory : Air Compressor(#10277-)
| 02***22 | Bolt | 2 |
| 02***70 | Bolt | 4 |
| 02***32 | Bolt | 6 |
Cooling System
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cooling System : Cooling Fan And V-Belt(#10277-)
| 04***82 | V-Belt Set | 1 |
| 60***20 | Fan,Cooling | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cooling System : Corrosion Resistor And Piping (Twin Turbocharger)(#10277-)
| 01***35 | Bolt,(Without Auto Priming System) | 1 |
| 01***50 | Bolt,(For Trimming Dozer) | 1 |
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cooling System : Tension Pulley And Mounting (Twin Turbocharger)(#10569-11793)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 3 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cooling System : Tension Pulley And Mounting (Twin Turbocharger)(#11794-)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 3 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cooling System : Water Pump And Mounting(#10277-)
| 01***25 | Bolt,(Without Auto Priming System) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***30 | Bolt,(For France Noise Suppression) | 5 |
Cylinder Block
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Block : Camshaft And Cam Follower(#10277-)
| 01***32 | Washer,(Not Used With Emergency Str.) | 12 |
| 04***38 | Key | 1 |
| 04***12 | Ring, Snap (4) | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Block : Crankshaft(#10277-)
| 04***28 | Key, Plain Woodruff | 1 |
| 04***24 | Pin,Dowel (For No.3 Housing) | 1 |
| 61***20 | Washer | 6 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Block : Cylinder Block (Twin Turbocharger)(#10277-)
| 01***18 | Bolt | 6 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Block : Cylinder Block Cover (Twin Turbocharger)(#10277-)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***30 | Bolt,(For France Noise Suppression) | 16 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Block : Flywheel And Flywheel Housing (Twin Turbocharger)(#10277-)
| 01***20 | Bolt,(Large Capacity Type) (Std) | 8 |
| 01***30 | Bolt,(For France Noise Suppression) | 3 |
| 01***45 | Bolt, Mount Bracket | 4 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Block : Front Cover And Front Support (Twin Turbocharger)(#10277-)
| 01***16 | Bolt,(For Slag Handling) | 12 |
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***85 | Bolt, Control Valve Mounting | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Block : Gear Case Cover And Gear (Twin Turbocharger)(#10277-)
| 01***60 | Bolt, Trunnion Cap | 10 |
| 01***35 | Bolt,(For Pedal Steering) | 4 |
| 01***40 | Bolt,(Not Used With Cab) | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Block : Oil Pan (Cold Terrain Spec.)(#10277-11682)
| 01***30 | Bolt,(For France Noise Suppression) | 49 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***90 | Bolt (M10-1.50x90) | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Block : Oil Pan (Cold Terrain Spec.)(#11683-)
| 01***30 | Bolt,(For France Noise Suppression) | 49 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***90 | Bolt (M10-1.50x90) | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Block : Oil Pan(#10277-11682)
| 01***30 | Bolt,(For France Noise Suppression) | 49 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***90 | Bolt (M10-1.50x90) | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Block : Oil Pan(#11683-)
| 01***30 | Bolt,(For France Noise Suppression) | 49 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***90 | Bolt (M10-1.50x90) | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Block : Piston And Connecting Rod(#10277-)
| 02***13 | Pin, Dowel | 4 |
| 61***60 | Piston Ring Ass'Y, Per Cylinder | 6 |
| 61***40 | Piston | 6 |
Cylinder Head
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Head : Air Intake Manifold And After Cooler (Twin Turbocharger)(#10277-)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 7 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***40 | Bolt,(For Position Fixing) | 4 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Head : Cylinder Head (Twin Turbocharger)(#10569-11682)
| 07***28 | O-Ring,(For Transmission Screen) | 2 |
| 07***08 | Plug (Kit) | 3 |
| 07***11 | Plug,(For Shipping) | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Head : Cylinder Head (Twin Turbocharger)(#11683-)
| 07***28 | O-Ring,(For Transmission Screen) | 2 |
| 07***08 | Plug (Kit) | 3 |
| 07***11 | Plug,(For Shipping) | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Head : Exhaust Manifold And Turbocharger (1/2) (Twin Turbocharger)(#10569-13353)
| 01***65 | Bolt | 2 |
| 01***00 | Bolt | 20 |
| 01***10 | Bolt | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Head : Exhaust Manifold And Turbocharger (1/2) (Twin Turbocharger)(#13354-)
| 01***65 | Bolt | 2 |
| 01***00 | Bolt | 20 |
| 01***10 | Bolt | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Head : Exhaust Manifold And Turbocharger (2/2) (Twin Turbocharger)(#10277-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 6 |
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***30 | Bolt,Radio Controlled Slag Handling | 8 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Head : Rocker Arm And Housing (Twin Turbocharger)(#10277-)
| 01***45 | Bolt,(Cold Terrain Spec.) | 6 |
| 01***55 | Bolt,(For France Noise Suppression) | 6 |
| 01***90 | Bolt,For Reversible Fan | 36 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Head : Rocker Arm Housing Cover (Twin Turbocharger)(#10277-)
| 01***55 | Bolt,(For Suction? Reversible Fan) | 27 |
| 01***25 | Bolt (M10x1.50x25) | 3 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 30 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Head : Water Manifold And Thermostat (Twin Turbocharger)(#10569-11311)
| 01***12 | Bolt,(Without R.P.C.U.) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 7 |
| 01***30 | Bolt,(For France Noise Suppression) | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Head : Water Manifold And Thermostat (Twin Turbocharger)(#11312-)
| 01***12 | Bolt,(Without R.P.C.U.) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 7 |
| 01***30 | Bolt,(For France Noise Suppression) | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Cylinder Head : Water Piping (Twin Turbocharger)(#10277-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 5 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 10 |
| 01***65 | Bolt,(For Suction Fan)(4d130-1d) | 2 |
Electrical System
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Electrical System : Alternator (50a)(#10440-)
| 60***81 | Alternator A. (50a) | 1 |
| SD***X0 | Coil Assembly | 1 |
| SD***X0 | Washer | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Electrical System : Alternator And Mounting (Twin Turbocharger)(#10277-)
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 1 |
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Electrical System : Alternator Drive(#10277-)
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
| 04***24 | Pin, Spring | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Electrical System : Starting Motor (7.5kw)(#10277-)
| 60***10 | Starting Motor Ass'Y,(7.5kw) | 2 |
| KD***20 | Magnetic Switch Assembly | 1 |
| KD***40 | Spring,Spring | 4 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Electrical System : Starting Motor And Mounting(#10277-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***20 | Bolt,(Used When Towing Winch) | 2 |
| 01***45 | Bolt,(For Slag Handling) | 6 |
Fuel System
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Automatic Timer(#10794-)
| 61***90 | Timer Ass'Y | 1 |
| DK***50 | Shim? 0.6mm | 0 |
| DK***20 | Seat,Spring | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Cold Starting Aid(#10277-)
| 07***18 | Tube,(For Chinese) | 1 |
| 58***10 | Cable,Control | 1 |
| 61***00 | Starter,Quick | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Filter(#10277-)
| 07***12 | Gasket,Mechanical Pump Piping | 2 |
| 07***08 | Plug,(Without Auto Priming System) | 1 |
| 07***12 | Plug,(For Shipping) (Not Shown) | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Coupling)(#10794-)
| 61***80 | Injection Pump A.,(See Fig.0451) | 1 |
| 61***81 | Injection Pump A.,(See Fig.0451a) | 1 |
| DK***00 | Washer | 8 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Feed Pump)(#10794-11644)
| 61***80 | Injection Pump A.,(See Fig.0451) | 1 |
| DK***00 | Valve,Check | 4 |
| DK***20 | Bolt,Joint | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Feed Pump)(#11683-)
| 61***81 | Injection Pump A.,(See Fig.0451a) | 1 |
| DK***00 | Valve,Check | 4 |
| DK***20 | Bolt,Joint | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#10794-11644)
| 61***80 | Injection Pump A.,(See Fig.0451) | 1 |
| DK***20 | Shim? 0.05mm | 0 |
| DK***40 | Ring,Snap | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#11645-11682)
| 61***81 | Injection Pump A.,(See Fig.0451a) | 1 |
| DK***20 | Shim? 0.05mm | 0 |
| DK***40 | Ring,Snap | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#11683-)
| DK***20 | Shim? 0.05mm | 0 |
| DK***40 | Ring,Snap | 1 |
| DK***00 | Nut | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#10794-11644)
| 61***80 | Injection Pump A.,(See Fig.0451) | 1 |
| DK***80 | Shim? 0.5mm | 0 |
| DK***00 | Gasket | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#11645-11682)
| 61***81 | Injection Pump A.,(See Fig.0451a) | 1 |
| DK***80 | Shim? 0.5mm | 0 |
| DK***00 | Gasket | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#11683-)
| DK***80 | Shim? 0.5mm | 0 |
| DK***00 | Gasket | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2)(#10794-11644)
| 61***80 | Injection Pump A.,(See Fig.0451) | 1 |
| 61***81 | Injection Pump A.,(See Fig.0451a) | 1 |
| DK***00 | Screw | 6 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2)(#11645-11682)
| 61***81 | Injection Pump A.,(See Fig.0451a) | 1 |
| 61***82 | Injection Pump A | 1 |
| DK***90 | Pump Ass'Y | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2)(#11683-)
| 61***82 | Injection Pump A | 1 |
| DK***30 | Shim? 0.14mm | 0 |
| DK***30 | Bearing | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2)(#10794-11644)
| 61***80 | Injection Pump A.,(See Fig.0451) | 1 |
| DK***00 | Bolt | 1 |
| DK***00 | Screw | 6 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2)(#11645-11682)
| 61***81 | Injection Pump A.,(See Fig.0451a) | 1 |
| DK***00 | Bolt | 1 |
| DK***00 | Screw | 6 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2)(#11683-)
| DK***00 | Screw | 6 |
| DK***20 | Valve,Delivery | 6 |
| DK***20 | Tappet | 6 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump And Mounting (Twin Turbocharger)(#10277-)
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 5 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump Linkage(#10277-10793)
| 01***20 | Bolt | 4 |
| 01***03 | Nut,L.H. Thread | 1 |
| 01***04 | Nut,(For 50a Alternator) | 3 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump Piping (1/2) (Twin Turbocharger)(#10277-)
| 01***30 | Bolt | 8 |
| 01***35 | Bolt | 1 |
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Injection Pump Piping (2/2) (Twin Turbocharger)(#10277-)
| 01***25 | Bolt,(Without Auto Priming System) | 1 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 1 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Fuel Nozzle And Spill Pipe(#10277-)
| 07***13 | Tube,(See Fig.0421-13) | 5 |
| 07***14 | Tube, Spill | 5 |
| 07***80 | Clip | 10 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Fuel System : Stop Motor And Mounting(#10794-)
| 01***16 | Bolt (Welded) | 3 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***30 | Bolt | 1 |
Lubricating Oil System
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Lubricating Oil System : Lubricating Oil Cooler (Cold Terrain Spec.)(#10277-)
| 01***16 | Bolt (Welded) | 12 |
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***25 | Bolt,(Without Auto Priming System) | 6 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Lubricating Oil System : Lubricating Oil Cooler(#10277-)
| 01***16 | Bolt (Welded) | 12 |
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 3 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Lubricating Oil System : Lubricating Oil Filter(#10277-)
| 01***40 | Bolt,(Dust And Dirt Protection) | 3 |
| 01***90 | Bolt,For Reversible Fan | 5 |
| 01***36 | Washer,Radio Controlled Slag Handling | 8 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Lubricating Oil System : Lubricating Oil Pump And Suction Pipe (Twin Turbocharger)(#10569-12024)
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***70 | Bolt, Spacer | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Lubricating Oil System : Lubricating Oil Pump And Suction Pipe (Twin Turbocharger)(#12025-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***70 | Bolt, Spacer | 2 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Lubricating Oil System : Mechanical Pump And Piping(#10277-)
| 01***16 | Bolt (Welded) | 2 |
| 01***12 | Bolt | 4 |
| 01***10 | Washer,Spring | 4 |
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Lubricating Oil System : Turbocharger Lubricating Oil Piping (Twin Turbocharger)(#10277-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 2 |
Tool And Kit
Komatsu : Sa6d170-A-1c(S/N 10569-Up) : Tool And Kit : Gasket Kit (Twin Turbocharger)(#10277-)
| 02***75 | O-Ring,(For Japan) (K1) | 4 |
| 06***04 | Seal,Bearing (K4) | 2 |
| 07***09 | O-Ring,(F4350-61a0 -33 ) | 2 |
SA6D170-A-1C(S/N 10569-UP) serial number reference
On the HD460-1, the engine serial plate is riveted to the block, low on the left side near the fuel injection pump/gear case, stamped with the full model code (SA6D170-A-1C) followed by the serial number. The machine PIN/chassis plate is separate, mounted on the frame near the cab or articulation area, and carries the HD460-1 model and chassis serial. Match the engine plate's stamped serial against the 10569-UP break to confirm this build spec before ordering parts.
| Prefix | Identifies | Notes |
|---|---|---|
| 2001-UP | Komatsu HD460-1 rigid dump truck, primary chassis serial block | Chassis S/N 2001 and up. Factory-fitted with the SA6D170-A-1C engine (paired build option: SA6D170-A-1E), engine S/N 10569-UP. This is the documented host machine tied to this exact engine serial start in factory equipment/engine cross-reference data. |
| A2060-UP | Komatsu HD460-1 rigid dump truck, parallel/alternate chassis serial block | Chassis S/N A2060 and up, listed alongside the 2001-UP block against the same engine range (SA6D170-A-1C / 1E, engine S/N 10569-UP). Source lists both serial blocks together rather than as a spec-change breakpoint; confirm with dealer whether this is a running continuation or a parallel numbering track (for example an options package or build-location variant). |
Frequently asked questions
What engine is the SA6D170-A-1C(S/N 10569-UP)?
It's a Komatsu SA6D170-A-1C, engine S/N 10569-UP: a 23.15 L (1,413 cu in) water-cooled inline-six diesel with 170 mm x 170 mm bore and stroke. It is mechanically governed and direct-injected, turbocharged with aftercooling. It predates Komatsu's later electronically controlled SAA6D170E generation, so there is no ECM and no diagnostic fault codes. A single confirmed rated-power figure for this exact serial range is not published; documented applications of this engine family span roughly 360-520 kW (480-700 hp) depending on the host machine.
What's the operating weight for this engine's application?
As a bare engine, this listing has no operating weight of its own. The confirmed host is the Komatsu HD460-1 rigid dump truck (chassis S/N 2001-UP and A2060-UP), rated at approximately 46 t (50.7 US ton) payload capacity per Komatsu's own historical product record. Tare and gross operating weight are not documented for this early generation - verify with your dealer.
What replaced this engine and truck?
Production of the HD460-1 continued on this same mechanical SA6D170-A-1 engine family across both confirmed chassis blocks, with no engine change. The truck line carried on through the HD465-2 and then the HD465-3 before Komatsu switched to the electronically controlled SAA6D170E engine at the HD465-7 generation, adding an ECM, diagnostic codes, and more power. That electronic engine line continued through the later HD465-8 and HD465-10 trucks.
What SA6D170-A-1C(S/N 10569-UP) owners discuss
What's it like running a machine with the SA6D170-A-1C engine day to day, and does the power delivery feel different from a modern engine?
This engine predates electronic engine control. Power comes from a mechanically governed inline injection pump with flyweight governor action, so throttle response is direct rather than mapped the way later common-rail engines are. Operators used to newer electronic-engine machines often describe the mechanical governor as slower to react right at the top and bottom of the rev range, with full power coming in gradually as the governor weights respond to load rather than snapping in on tip-in. There is no torque management or automatic derate, so the engine keeps pulling through a grade as long as fuel delivery and boost stay healthy. It will not protect itself the way a modern engine does, so watching oil pressure, coolant temperature, and exhaust temperature (where fitted) matters more on this generation than on a newer one.
Are there known fuel-system quirks on this engine, and what causes most of the injection pump and injector complaints?
The mechanical inline injection pump on this engine family is simple but unforgiving of dirty or wet fuel. Community experience with mechanically injected Komatsu diesels of this era is consistent: water or fine grit that gets past the primary filter wears the pump's precision plunger-and-barrel elements and injector tips well before the filters themselves show wear, so keeping to the fuel filter and water-separator service interval, and bleeding air from the low-pressure side after every filter change, is treated as mandatory rather than optional. A pump that has lost calibration usually shows up first as a rough or uneven idle and light white-to-gray smoke under light load, before there is any noticeable power loss. Because the pump carries no self-diagnostics, timing and output can only be confirmed with a bench test or factory on-engine check, not by ear. Have your dealer verify injection pump timing and calibration rather than adjusting it on guesswork.
What maintenance issues come up most with the turbocharger and aftercooler on this engine?
The turbocharger and air-to-air aftercooler need to stay clean to keep intake air temperature and boost within what the mechanical governor expects. In quarry and mine-site dust, the aftercooler core packs with fine material on the outside and can foul internally over years of service; a partially blocked core shows up as higher exhaust temperature and a flat feel under load long before anyone thinks to inspect it. On the turbo itself, the recurring complaint on this generation is oil coking in the feed and drain lines when oil-change intervals get stretched, which starves the bearing and shows up as shaft play or a whining or rattling turbo. Routine core cleaning and staying on the oil interval prevent most of it. A turbo with detectable shaft play should have the bearing housing inspected by your dealer before it fails and sends debris into the intake.
This engine uses wet cylinder liners. What cooling-system problems typically show up on engines this age?
With coolant contacting the liner outer surface directly, liner cavitation erosion is a well-known failure mode on wet-liner diesels of this era if the corrosion-inhibitor level is not maintained. Owners and mechanics on this generation treat coolant additive testing as a real maintenance item rather than an afterthought, because a liner pitted by cavitation eventually lets coolant into the oil or oil into the coolant, and that repair is far more costly than a bottle of additive and a test kit. Outside of additive management, keeping the radiator and aftercooler fins clear of packed dirt is the main day-to-day cooling concern in dusty applications.
Does this engine have sensor or electrical issues people commonly report?
Not in the sense people mean on later common-rail engines. This engine has no ECM and no fault-code system, so there is no electronic sensor network to fail. What does come up is ordinary charging-system and instrument wiring: corroded connectors and chafed harness runs at the engine-mounted alternator, starter, and any water-in-fuel or oil-pressure switches, mostly from vibration and heat cycling over decades of service. When a gauge reads wrong or a warning lamp misbehaves on a machine this old, the general mechanical consensus is to chase grounds and connector corrosion first rather than assume a switch or sender has failed.
What wear patterns show up on the host truck alongside this engine, since it's a rigid dump truck rather than a tracked machine?
On a rigid-frame haul truck, the equivalent of undercarriage wear is front-axle kingpins and wheel bearings, frame cracking around the hoist-cylinder mounts and rear suspension pivots, and leaking suspension (strut) cylinders, all common on haul trucks of this era with heavy cycle counts. Tire wear and dump-body or hoist-cylinder condition track duty cycle more than engine hours. None of this is specific to the engine itself, but it is what shows up alongside it on a truck old enough to still be running this powertrain. Frame cracking at load-bearing points is a safety item; have your dealer or a qualified inspector verify any suspected frame crack before the truck goes back into service.
What should a buyer or mechanic check before purchasing a used machine with this engine?
Typical checks: compression or blow-by across cylinders as a first read on liner and ring condition; the aftercooler core for internal and external fouling; coolant condition and additive level as a proxy for cavitation risk on the wet liners; engine oil for any sign of coolant cross-contamination; and exhaust color and smoke under load as a rough gauge of injection pump and injector health. Because the injection pump has no on-board diagnostics, a smoke test and idle quality check are the practical field checks; anything beyond that needs a bench test. Also worth pulling service records for prior overhaul history given the engine's age, and checking the truck frame at the hoist and suspension mounting points for cracking. Have your dealer verify injection pump calibration and inspect the turbocharger and frame before finalizing a purchase.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Serial-range & configuration variants
This page covers the Komatsu SA6D170-A-1C(S/N 10569-UP). Related factory variants of the same model family:
SA6D170-A-1C(S/N 10569-UP (TWIN TURBOCHARGER))
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