Komatsuengine(no series)
Komatsu SA6D170-A-1C(S/N 10569-UP (TWIN TURBOCHARGER))
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu SA6D170-A-1C (S/N 10569-UP) is a six-cylinder, liquid-cooled, turbocharged diesel engine manufactured by Komatsu. It features a water-cooled aftercooler and is designed for heavy-duty applications in construction and mining equipment. This engine powers the WA700-1 wheel loader series and various excavator models in the 20 to 30-ton class. Production years span from approximately 2017 to 2026, with the SA6D170-A-1C serving as a variant within the broader 6D170 engine family. Configurations include twin turbocharger setups for specific serial ranges, offering power outputs ranging from 196 to 359 HP (147 to 268 kW) depending on the host machine and emissions tier.
Across the 6D170 series generations, changes primarily involve emissions compliance updates, moving from Tier 2/Stage II standards to Tier 4 Final/Stage V requirements. The SA6D170-A-1C represents a specific configuration within this lineage, often distinguished by its twin turbocharger setup in later serial ranges compared to single-turbo predecessors. In the used and parts market, this engine remains significant due to its widespread use in the WA700 wheel loader and PC series excavators. Its modular design and availability of overhaul kits make it a staple for fleet maintenance, with the twin turbo configuration requiring specific attention to intercooler and turbocharger components during rebuilds.
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 (TWIN TURBOCHARGER)) specifications
Engine
| Model | SA6D170-A-1C |
| Configuration | Twin Turbocharger (S/N 10569-UP) |
| Cylinders | 6 |
| Displacement | 16.86 L (1,028.8 cu in) |
| Bore | 170 mm (6.69 in) |
| Stroke | 170 mm (6.69 in) |
| Aspiration | Turbocharged, after-cooled |
| Emissions Tier | Tier 2 / EU Stage II |
Weights
| Engine Weight | 1,700 kg (3,748 lb) |
Dimensions
| Engine Dimensions (L x W x H) | 225 x 160 x 185 cm (88.6 x 63.0 x 72.8 in) |
Performance
| Power Range | 550 to 700 hp (410 to 522 kW) |
| Specific Power (Reference) | 700 hp (522 kW) @ 1,800 rpm (Marine Core Spec) |
Service capacities (summary)
| Engine Oil | Not documented for this exact serial range — verify with your dealer |
| Cooling System | Not documented for this exact serial range — verify with your dealer |
| Fuel Tank | Not documented for this exact serial range — verify with your dealer |
| Hydraulic System | Not 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 SA6D170-A-1C(S/N 10569-UP (TWIN TURBOCHARGER)) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the SA6D170-A-1C(S/N 10569-UP (TWIN TURBOCHARGER)) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize KOWA fluid analysis at every 500-hour interval to monitor engine wear metals, coolant contamination, and fuel dilution. Check the air filter restriction indicator daily; replace the outer element at 1,000 hours or when indicated. Monitor DEF levels daily on Tier 4 variants to prevent injector issues. Inspect turbocharger inlet and outlet hoses for cracks or oil leaks, which indicate seal failure. Verify coolant SCA concentration at 500 hours to ensure proper corrosion inhibition for the SA6D170-A-1C's water-cooled aftercooler system.
Corrective & Common Repairs
Address intermittent starting or shutdowns by checking the engine controller power supply and sensor wiring, common in SA6D170-A-1C units. Replace fuel filters at 500 hours to prevent injector wear from contaminated fuel. Inspect the twin turbocharger assembly for shaft play or bearing noise, especially in S/N 10569-UP units. Check the air intake system for blockages that reduce turbo efficiency. Replace worn belts and hoses at 2,000 hours to prevent sudden failure under heavy load.
Overhaul & Rebuild Points
Plan for an in-frame overhaul around 10,000 to 15,000 hours, depending on load factors. Replace piston rings and liners if compression drops below spec. Inspect the cylinder head for warpage or valve seat wear. Use an out-of-frame overhaul kit for complete rebuilds, including bearings and gaskets. Check the turbocharger shaft and bearings for wear; replace if clearance exceeds limits. Ensure the water-cooled aftercooler cores are clean and leak-free during any cooling system service.
Seasonal & Environment Servicing
In dusty environments, clean the radiator and oil cooler fins daily to prevent overheating. Use Komatsu Super Coolant AF-NAC in freezing climates to prevent block cracking. Check the battery fluid levels and terminals in cold weather to ensure reliable starting. In high-temperature operations, monitor coolant temperature gauges closely and clean the KDPF if equipped. Grease all pivot points more frequently in abrasive conditions to extend undercarriage and linkage life.
SA6D170-A-1C(S/N 10569-UP (TWIN TURBOCHARGER)) 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 (TWIN TURBOCHARGER)) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA111 | ECM Critical Internal Failure (Engine Controller Internal Abnormality) | Internal fault within the engine electronic control module; potential hardware failure or corrupted memory. | Inspect ECM power and ground connections; if connections are secure, replace or reprogram the ECM. |
| CA115 | Engine Speed and Backup Speed Sensor Error | Faulty crankshaft speed sensor, broken wiring, or corroded connector at the sensor pin. | Replace the speed sensor and verify voltage at the pin connector. |
| CA122 | Charge Air Pressure Sensor High Error | Intake air pressure sensor feedback voltage is too high; possible sensor malfunction or short. | Verify the intake pressure sensor operation and inspect the wiring harness. |
| CA123 | Charge Air Pressure Sensor Low Error | Intake air pressure sensor feedback voltage is too low; possible sensor short or airflow restriction. | Check for a sensor short circuit or an airflow restriction in the intake system. |
| CA144 | Coolant Temperature Sensor High Error | Coolant temperature sensor feedback voltage is too high; sensor failure or open circuit. | Replace or test the coolant temperature sensor. |
| CA153 | Charge Air Temperature Sensor High Error | Intake air temperature sensor feedback voltage is too high; sensor malfunction. | Replace or test the intake air temperature (IAT) sensor. |
| CA441 | Battery Voltage Low Error | Battery voltage is too low; failing battery or alternator charging issue. | Replace the alternator or battery; check the voltage regulator. |
| CA451 | Rail Pressure Sensor High Error | Common rail pressure sensor feedback value is too high; sensor malfunction or actual overpressure. | Diagnose the fuel rail pressure sensor or check pump lines for blockage. |
| AA10NX | Air Cleaner Clogging | Engine air filter element is clogged with debris. | Replace the air filter element. |
| B@BCNS | Engine Water Overheat | Engine coolant temperature exceeds safe operating limits; radiator blockage or low coolant. | Check radiator fins for debris, inspect fan belt condition, and verify coolant level. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
SA6D170-A-1C(S/N 10569-UP (TWIN TURBOCHARGER)) attachments & work tools
Wheel Loader Attachments
The Komatsu WA700 series wheel loader, powered by the SA6D170-A-1C engine, utilizes a standard quick coupler system for bucket attachment. Factory configurations typically include a 9.2 m³ (325 cu ft) general-purpose bucket for this class, with capacity varying by configuration/series based on material density and specific model variant.
Excavator Attachments
The PC1250-7 excavator, equipped with the SAA6D170E-3 engine variant, employs a proprietary Komatsu quick-attach system for bucket and tool mounting. Typical bucket capacities for this machine class range from 10 to 15 m³ (353 to 530 cu ft), varying by configuration/series depending on the specific boom and stick configuration.
Generator Set Attachments
The EGS650 and EGS850 generator sets use the SA6D170-A-1C or SAA6D170E-2A engine variants. These units feature a fixed mounting frame with a standard industrial alternator interface; no external work tools are attached, but the configuration includes factory-mounted sound-attenuated canopies and exhaust silencing systems.
Hydraulic System Notes
Tools requiring auxiliary hydraulics, such as high-shear grapples or hydraulic breakers, must utilize the machine's factory-installed auxiliary hydraulic lines. The SA6D170-A-1C engine class typically supports dual auxiliary circuits with flow rates varying by configuration/series to match the specific implement requirements of the WA700 or PC1250 platforms.
All SA6D170-A-1C(S/N 10569-UP (TWIN TURBOCHARGER)) assemblies by section
Every catalogued assembly group for the Komatsu SA6D170-A-1C(S/N 10569-UP (TWIN TURBOCHARGER)). 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (Twin Turbocharger)) : 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 (TWIN TURBOCHARGER)) serial number reference
The PIN plate is typically located on the right-hand side of the cab on the lower frame, near the front idler or beneath the operator's window. Read the prefix from the 17-character ISO PIN (positions 4–8 encode model family and configuration) or the engine model code stamped on the engine block or data plate.
| Prefix | Identifies | Notes |
|---|---|---|
| SA6D170-A-1C | Twin Turbocharger | Serial range 10569-UP. Identified as a specific variant within the SA6D170-A-1C family requiring the Twin Turbocharger configuration catalog. Source: published references catalog listing for SA6D170-A-1C S/N 10569-UP (Twin Turbocharger). Verify with dealer for exact application to specific machine models. |
Frequently asked questions
What is the engine model?
Komatsu SA6D170-A-1C (S/N 10569-UP) with twin turbocharger.
What is the operating weight range?
Varies by configuration/series; typically 67,120-107,497 lbs (30,445-48,760 kg) for host machines.
What replaced it?
Komatsu SAA6D170E-3 series engines in newer WA700 and excavator models.
What SA6D170-A-1C(S/N 10569-UP (TWIN TURBOCHARGER)) owners discuss
What are the known powertrain and hydraulic behaviors for machines using the SA6D170-A-1C engine?
The SA6D170-A-1C is a 6-cylinder, 23.1-liter diesel engine with a 170 mm bore. It typically powers heavy-class equipment such as the WA700 wheel loader and PC1000 excavator. The engine is turbocharged with a water-cooled aftercooler. Hydraulic systems in these machines are sensitive to oil temperature; performance often degrades when hot due to internal leakage in pumps or valves if viscosity drops too low. The engine is designed for high torque and fuel efficiency, but hydraulic weakness under load often indicates engine speed loss or pump wear rather than simple blockage. The line is noted for smooth operation and fuel efficiency compared to older generations, though resale value can suffer if hydraulic pumps fail, as engine damage often follows pump failure. Power output varies by configuration, typically ranging from 196 to 359 HP (147 to 268 kW) depending on the specific machine application and emissions tier.
What undercarriage or wear patterns are typical for machines equipped with this engine series?
Machines powered by the SA6D170 series are heavy-duty units where undercarriage wear is a primary maintenance cost. Common wear patterns include rapid degradation of track pads, bushings, and bearings due to high ground pressure and continuous load. Track tension must be monitored closely, as repeated loosening is a frequent issue linked to undercarriage component wear rather than just adjuster failure. Rollers and track chains show accelerated wear in dusty or abrasive environments. The machine design tends to wear out complete systems simultaneously; if one major component like a final drive or travel motor fails, the rest of the undercarriage and powertrain are often near end-of-life. Proper track tension and regular inspection of mechanical resistance in both forward and reverse travel are critical to diagnosing side-specific wear.
What are the specific quirks of the SA6D170-A-1C engine series compared to related variants?
The SA6D170-A-1C (S/N 10569-UP) is part of the 6D170 series, distinguished by its 170 mm bore and 23.1-liter displacement, unlike the smaller SA6D102 series. Key quirks include the use of hardened liners and high-alloy piston rings, which are more durable than earlier soft-liner designs found in some Cummins-based competitors. The engine uses a Bosch-style fuel system with injector pressures around 3,200 PSI. It is turbocharged (indicated by 'S' in the model code) and features a water-cooled aftercooler (indicated by 'A'). The 'C' suffix denotes specific emissions or configuration updates. Unlike the SA6D102 variants which may have different serial prefixes and lower displacement, the SA6D170-A-1C is built for higher power density applications like large wheel loaders and excavators. The engine requires specific Komatsu fluids and is sensitive to fuel quality; air entering the fuel supply or clogged filters can cause immediate power loss under load.
What are common electrical or sensor issues reported for this engine and its machine platform?
Komatsu machines with this engine series rely heavily on electronic control systems. Common issues include intermittent starting, dashboard failures, and random shutdowns caused by unstable power supplies or faulty sensors. Specific fault codes often point to engine speed sensor failures, which can be triggered by broken sensors, wiring issues, or connector corrosion. Multiple fault codes may indicate battery degradation or poor chassis/engine grounds. The machine's electronic control unit monitors hydraulic and engine performance closely; a single faulty sensor can trigger multiple warning signals. Operators should check battery state of charge, terminal integrity, and main starter cables before diagnosing complex electronic faults. Voltage collapse under load during starting can mimic electrical failures but may indicate a weak battery or high-resistance connections.
What should be checked when buying a used machine with the SA6D170-A-1C engine?
When inspecting a used machine with the SA6D170-A-1C engine, verify the exact serial number to confirm the engine model and configuration. Check the cooling system for blockage between the radiator, hydraulic oil cooler, and charge-air cooler, as material packed between heat exchangers is common. Test hydraulic performance both cold and hot; weakness when hot indicates internal leakage in pumps or valves. Inspect the undercarriage for track tension, roller condition, and chain wear, as these wear simultaneously. Check for signs of coolant expulsion or high system pressure, which may indicate deeper engine issues. Verify the condition of the turbocharger and charge-air hoses for leaks or damage. Ensure the fuel system is free of air and water, and check the fuel filters and water separator. Look for any history of hydraulic pump failure, as this often precedes engine damage. Confirm the engine runs smoothly without excessive smoke or power loss under load.
What are the critical fluid specifications and capacities for this engine?
The SA6D170-A-1C engine requires specific Komatsu fluids for optimal performance. Use Komatsu EO or equivalent diesel engine oil for lubrication. Hydraulic systems require Komatsu TO or HO hydraulic oil, with capacity varying by machine configuration. Coolant should be Komatsu Super-coolant AF-NAC or equivalent. The engine displacement is 23.1 liters, and the cooling system capacity varies by machine model. Always consult the specific machine's operation and maintenance manual for exact fluid capacities and specifications, as they differ between wheel loaders and excavators. The engine uses a water-cooled aftercooler, so coolant level and condition are critical for turbocharger and intake air temperature management.
What safety-critical fixes or inspections are required for the turbocharger and cooling system?
The SA6D170-A-1C engine is twin-turbocharged (or single turbo with aftercooler depending on specific machine config, but the prompt specifies twin turbocharger). Safety-critical inspections include checking the turbocharger for shaft play, seal integrity, and hose connections. Leaks in charge-air hoses can cause power loss and overheating. The cooling package must be kept clean; blocked spaces between heat exchangers can lead to overheating under load. Coolant level must be checked when cold. If the engine overheats, allow it to idle before shutting down to prevent thermal shock. Have your dealer verify the turbocharger condition and cooling system pressure test results, as improper cooling can lead to catastrophic engine failure. Ensure all turbocharger inlet and outlet hoses are secure and free of cracks.
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 (TWIN TURBOCHARGER)). Related factory variants of the same model family:
SA6D170-A-1C(S/N 10569-UP)
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