Komatsuengine(no series)
Komatsu SAA6D170E-3E-8(S/N 310001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu SAA6D170E-3E-8 is a six-cylinder, turbocharged, aftercooled diesel engine used in the Komatsu 170-3 series of heavy construction equipment. It powers large-scale machines including the PC1250-7 excavator, WA600-3 and WA700-3 wheel loaders, and HD465-7 rigid dump trucks. The engine delivers approximately 533 kW (715 hp) to 568 kW (761 hp) depending on the specific application and configuration. Production for this serial range (310001-UP) spans the late 1990s through the 2000s, serving as the successor to the SAA6D170E-2A-8 and predecessor to the SAA6D170E-5 and SAA6D170E-7 generations.
Across the 170-3 series, Komatsu refined the variable geometry turbocharger and electronic control systems to improve fuel efficiency and meet evolving emissions standards. The SAA6D170E-3E-8 remains critical in the used market because it powers high-hour, high-value machines like the PC1250 excavator and WA600 loader, which are still widely deployed in mining and heavy earthmoving. Its robust cast-iron block and modular design allow for extensive rebuilds, keeping these older platforms viable long after newer Tier 4/Stage V models replaced them in new production.
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 SAA6D170E-3E-8(S/N 310001-UP) specifications
Engine
| Model | SAA6D170E-3E-8 |
| Series/Generation | 170-3 Series |
| Cylinders | 6 |
| Displacement | 16.86 L (918.8 cu in) |
| Bore x Stroke | 170 mm x 170 mm (6.69 in x 6.69 in) |
| Aspiration | Turbocharged, after-cooled, cooled EGR |
| Emissions Tier | Tier 2 / EU Stage II |
| Power (Net) | 455 kW @ 1800 RPM (610 hp @ 1800 RPM) |
Weights
| Operating Weight | Varies by configuration/series (e.g., 74,090 kg for D375 dozer; 55,400–57,501 kg for WA600 loader; 97,100 kg for WA700 loader) |
| Engine Weight | Approx. 1,700 kg (3,748 lb) |
Dimensions
| Engine Dimensions (L x W x H) | 2,250 x 1,600 x 1,850 mm (88.6 x 63.0 x 72.8 in) |
Performance
| Travel Speed | Not documented for this exact serial range — verify with your dealer |
| Gradeability | Not documented for this exact serial range — verify with your dealer |
Service capacities (summary)
| Cooling System | Liquid cooling system |
| Engine Oil | SAE 10W-30 |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Komatsu SAA6D170E-3E-8(S/N 310001-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the SAA6D170E-3E-8(S/N 310001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize KOWA fluid analysis at every 500-hour interval to monitor wear metals and contamination in the SAA6D170E-3E-8. Track iron and copper levels in engine oil to detect cylinder liner or bearing wear early. Analyze hydraulic fluid for particle count and viscosity changes to protect the PC1250-7 or WA600-3 hydraulic pumps. Coolant SCA testing at 500 hours prevents cavitation in the engine block. KOMTRAX telematics data helps correlate load frequency with fluid degradation rates for precise service scheduling.
Corrective & Common Repairs
Address frequent SAA6D170E-3E-8 issues by inspecting the variable geometry turbocharger actuator linkage for stiffness or corrosion. Check the EGR cooler for leaks that cause coolant loss or oil dilution. Replace the fuel injector O-rings if black smoke or hard starting occurs. Inspect the oil cooler core (part of the 6240 series) for internal cross-contamination. Verify the integrity of the engine mount bolts, which can fatigue under the high torque loads of the HD465-7 dump truck applications.
Overhaul & Rebuild Points
Plan the inframe overhaul for the SAA6D170E-3E-8 around 15,000 to 20,000 hours, depending on maintenance history. Replace piston rings, liners, and bearings during this interval. Inspect the cylinder head for warpage and replace valve seats if necessary. The turbocharger should be replaced or rebuilt if shaft play exceeds limits. Verify the crankshaft journal diameters before reassembly. Use Komatsu Genuine Lubricants during reassembly to ensure proper break-in of the new components.
Seasonal & Environment Servicing
In cold climates, ensure the coolant mixture provides adequate freeze protection for the SAA6D170E-3E-8 liquid cooling system. Check the air intake heater operation before winter starts. In dusty environments, clean the radiator and oil cooler fins daily to prevent overheating. Inspect the air filter restriction indicator frequently and replace the outer element at 1,000 hours or sooner if clogged. In high-temperature operations, monitor the turbocharger outlet temperature and ensure the charge air cooler is free of debris.
SAA6D170E-3E-8(S/N 310001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 6217-71-6520 | Plate? Caution,Fuel Filter | Fuel system service | Check fitment → |
| 6217-71-6470 | Plate? Caution,Fuel Filter | Fuel system service | Check fitment → |
| 6217-71-6480 | Plate,Fuel Filter | Fuel system service | Check fitment → |
| 6217-71-6530 | Plate,Fuel Filter | Fuel system service | Check fitment → |
| 6217-71-6550 | Plate,Fuel Filter | Fuel system service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
SAA6D170E-3E-8(S/N 310001-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine speed sensor and backup speed sensor failure | Faulty crankshaft speed sensor, broken wiring harness, or corroded connector at the sensor pin | Inspect the sensor wiring and connector for damage; replace the engine speed sensor if voltage is abnormal |
| CA111 | Engine controller internal fault | Critical internal failure of the Electronic Control Module (ECM) | Replace or reprogram the ECM; verify power and ground connections first |
| CA441 | Battery voltage is too low | Weak battery, failing alternator, or loose charging cables | Check battery charge state and alternator output; tighten cable connections |
| CA442 | Battery voltage is too high | Faulty voltage regulator or alternator overcharging | Test alternator output; replace the alternator or voltage regulator if defective |
| CA451 | Common rail pressure sensor feedback value is too high | Malfunctioning rail pressure sensor or actual overpressure condition in the fuel line | Diagnose the fuel rail pressure sensor circuit and check for physical blockages in fuel lines |
| CA452 | Common rail pressure sensor feedback value is too low | Faulty rail pressure sensor or fuel leak reducing system pressure | Check fuel lines for leaks and test the pressure sensor voltage signal |
| CA234 | Engine overspeed | Throttle calibration error, excessive engine load cycle, or operator misuse | Verify throttle calibration and inspect the engine load cycle for anomalies |
| AA10NX | Air cleaner clogging | Dirty or blocked air filter element | Replace the air filter element immediately |
| B@BCNS | Engine coolant overheating | Low coolant level, blocked radiator fins, or failed fan belt | Check coolant level, inspect radiator fins for debris, and verify fan belt tension |
| E10 | Engine controller power failure | Loss of power to the engine control drive system circuit | Inspect ECM power connections, fuses, and ground wires for continuity |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
SAA6D170E-3E-8(S/N 310001-UP) attachments & work tools
Wheel Loader Attachments
The WA600-3 and WA700-3 wheel loaders equipped with the SAA6D170E-3E-8 engine utilize bucket capacities ranging from 6.4 m³ to 9.2 m³. These machines are designed for quarry and aggregate operations with operating weights between 55,400 kg and 97,100 kg. Factory configurations include high-efficiency buckets and automatic digging systems.
Excavator Attachments
The PC1250-7 excavator series uses the SAA6D170E-3E-8 engine for serial numbers 310,005 and up. Standard configurations include heavy-duty digging buckets and grading blades suitable for large-scale mining. Hydraulic arrangements support high breakout force requirements for this class of machine.
Bulldozer Attachments
The D375A-5 bulldozer series is powered by the SA6D170E-3A-7 variant of the engine for serial numbers 310,001 and up. Blade capacities range from 18.5 m³ to 22.0 m³. The machine features a compact design with durable undercarriage systems for land leveling and construction applications.
Dump Truck Attachments
The HD465-7 and HD605-7 off-highway dump trucks utilize the SAA6D170E-3E-8 engine for serial numbers 7,001 and up. These models are engineered for heavy hauling in mining environments. Factory options include specialized body configurations and reinforced chassis guarding for durability.
Coupler and Mounting Systems
Specific coupler models or mounting dimensions are not documented for this exact serial range in the provided sources. Verify with your dealer for the specific quick-attach system required for the WA600-3, WA700-3, PC1250-7, or D375A-5 configurations.
Hydraulic Kit Arrangements
The PC1250-7 and PC1250SP-7 excavators require specific hydraulic kit arrangements for attachment operation. Factory specifications for hydraulic flow and pressure vary by configuration/series. Consult the operation and maintenance manual for the exact hydraulic circuit requirements for your machine.
Factory Guarding and Options
Komatsu WA600-3 and WA700-3 models feature centralized service points and durable components for ease of maintenance. The D375A-5 bulldozer includes easy maintenance access and a fuel-efficient engine configuration. Specific guarding options for attachments are not detailed in the provided sources.
All SAA6D170E-3E-8(S/N 310001-UP) assemblies by section
Every catalogued assembly group for the Komatsu SAA6D170E-3E-8(S/N 310001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Engine
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : After Cooler(#310213-)
| 62***00 | After Cooler Ass'Y | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Cleaner Mounting(#310213-310515)
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 3 |
| 01***45 | Bolt, Mounting Cranking Motor | 3 |
| 01***90 | Bolt,For Weight Adjusting Bolt | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Cleaner Mounting(#310516-)
| 01***35 | Bolt,(F4320-52a0 -5 ) | 1 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 3 |
| 01***45 | Bolt, Mounting Cranking Motor | 3 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Cleaner Piping (Tropical Spec.)(#310213-310515)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
| 01***80 | Bolt,For Weight Adjusting Bolt | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Cleaner Piping (Tropical Spec.)(#310516-)
| 01***35 | Bolt,(F4320-52a0 -5 ) | 1 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 4 |
| 01***80 | Bolt,For Weight Adjusting Bolt | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Compressor (Inner Parts)(#310213-)
| 62***00 | Air Compressor Ass'Y | 1 |
| DK***00 | Bearing | 1 |
| DK***20 | Unloader Valve A | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Compressor (Inner Parts)(#311092-)
| 62***00 | Air Compressor Ass'Y | 1 |
| DK***00 | Bearing | 1 |
| DK***20 | Unloader Valve A | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Compressor (Water Piping) (Without Corro.Rstr.) (2/2)(#311092-)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Compressor (Without Corro.Rstr.) (1/2)(#311092-)
| 01***95 | Capscrew | 1 |
| 01***20 | Screw | 4 |
| 01***30 | Bolt | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Compressor Gasket Kit(#310213-)
| 07***20 | O-Ring,(F5350-67a0 -17 ) | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 5 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 10 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Compressor Mounting (1/2)(#310213-)
| 01***95 | Capscrew | 1 |
| 01***20 | Screw | 4 |
| 01***30 | Bolt | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Compressor Mounting (Water Piping) (2/2)(#310213-)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Connection Hose (Tropical Spec.)(#310213-)
| 07***70 | Clamp,Hose | 2 |
| 62***20 | Hose | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Intake Manifold(#310213-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***30 | Bolt,(With Body Positioner) | 3 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Vent(#310213-)
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 01***16 | Washer,Radio Controlled Slag Handling | 1 |
| 07***15 | Gasket,(Hd325?Pc750?800?1800) (A5010) | 12 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Air Vent(#310594-)
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 01***16 | Washer,Radio Controlled Slag Handling | 1 |
| 07***15 | Gasket,(Hd325?Pc750?800?1800) (A5010) | 12 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Alternator (50a) (Inner Parts)(#310213-)
| 60***20 | Alternator A. (50a) | 1 |
| KD***40 | Bushing,Insulate | 1 |
| KD***80 | Bearing, Ball | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Alternator (90a) (Inner Parts)(#310213-)
| 60***20 | Alternator A. (90a) | 1 |
| 60***20 | Alternator A. (90a) | 1 |
| KD***02 | Bolt | 4 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Alternator Drive(#310169-)
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 8 |
| 62***10 | Pulley | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Alternator Mounting (50a)(#310213-)
| 01***30 | Bolt,(With Body Positioner) | 8 |
| 01***45 | Bolt,(With Water Separator Type) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Alternator Mounting (90a)(#310213-)
| 01***30 | Bolt,(With Body Positioner) | 8 |
| 01***45 | Bolt,(With Water Separator Type) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Camfollower Cover(#310005-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***45 | Bolt,(With Water Separator Type) | 1 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Camshaft
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 04***28 | Key, Plain Woodruff | 1 |
| 04***12 | Ring, Snap (4) | 2 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Caution Plate (Chinese)(#310062-)
| 62***20 | Plate? Caution,Fuel Filter | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Caution Plate (English)(#310024-)
| 62***70 | Plate? Caution,Fuel Filter | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Caution Plate (French)(#310024-)
| 62***90 | Decal, High Fuel Pressure | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Caution Plate (German)(#310024-)
| 62***80 | Plate,Fuel Filter | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Caution Plate (Indonesian)(#310062-)
| 62***30 | Plate,Fuel Filter | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Caution Plate (Italian)(#310062-)
| 62***50 | Plate,Fuel Filter | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Caution Plate (Persian)(#310062-)
| 62***80 | Plate,Fuel Filter | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Caution Plate (Spanish)(#310024-)
| 62***10 | Plate,Fuel Filter | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Corrosion Resistor(#310213-)
| 01***40 | Screw, Hex Socket | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Crank Pulley (Tropical Spec.)(#310213-)
| 61***20 | Washer | 6 |
| 61***22 | Bolt | 6 |
| 62***60 | Pulley? Hardening | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Crank Pulley(#310213-)
| 61***20 | Washer | 6 |
| 61***22 | Bolt | 6 |
| 62***40 | Pulley,Hardening | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Crankshaft(#310021-)
| 04***28 | Key, Plain Woodruff | 1 |
| 04***24 | Pin,Dowel (For No.3 Housing) | 1 |
| 61***50 | Thrust Bearing Assembly | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Cylinder Block
| 01***16 | Bolt, Mount Solenoid Valve | 12 |
| 01***60 | Washer,(Without Rops Guard? Canopy) | 14 |
| 04***14 | Pin, Dowel | 2 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Cylinder Block Blind Cover And Sensor (Vhms Spec.)(#310594-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 5 |
| 01***30 | Bolt,(With Body Positioner) | 3 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Cylinder Block Blind Cover(#310213-310515)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 3 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Cylinder Block Blind Cover(#310516-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 5 |
| 01***30 | Bolt,(With Body Positioner) | 3 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 6 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Cylinder Block Gasket Kit(#310213-)
| 07***25 | O-Ring,Corrosion Resistor | 1 |
| 07***85 | O-Ring,Transmission Case Mount | 1 |
| 07***95 | O-Ring,Transmission Strainer | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Cylinder Head
| 01***70 | Bolt | 12 |
| 04***20 | Pin,Dowel (Welded) | 2 |
| 07***38 | 0-Ring - Torque Converter Totransmission | 2 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Cylinder Head Gasket Kit(#310213-)
| 02***81 | O-Ring,(Fig.A1310) | 2 |
| 07***12 | O-Ring,(F4350-59a1 -17 ) | 6 |
| 07***38 | 0-Ring - Torque Converter Totransmission | 12 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Damper(#310024-)
| 01***40 | Bolt (Op) | 12 |
| 01***32 | Washer,(With Auto Emergency Steering) | 12 |
| 62***20 | Pin,Dowel | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Ejector Tube Unit(#310213-)
| 01***30 | Bolt | 2 |
| 01***09 | Nut,(For Japan) | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Engine Mounting(#310213-)
| 01***50 | Bolt,For Weight Adjusting Bolt | 1 |
| 01***10 | Bolt,For Weight Adjusting Bolt | 12 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 13 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Exhaust Manifold(#310024-)
| 01***90 | Bolt | 24 |
| 61***90 | Spacer | 24 |
| 62***20 | Screw | 2 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Exhaust Manifold(#310516-)
| 01***90 | Bolt | 24 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 3 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Exhaust Pipe(#310213-)
| 61***80 | Pipe,Ex | 1 |
| 61***40 | Cap,Rain | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Fan Belt(#310213-)
| 04***68 | V-Belt Set | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Flywheel Housing(#310213-)
| 01***30 | Bolt,(With Body Positioner) | 3 |
| 01***15 | Bolt | 5 |
| 01***10 | Bolt | 9 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Flywheel(#310213-)
| 61***40 | Washer | 10 |
| 62***20 | Flywheel Ass'Y | 1 |
| 62***50 | Bolt | 10 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Front Cover Mounting(#310213-)
| 01***75 | Bolt - Tube Mounting | 4 |
| 61***40 | Indicator | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Front Cover(#310005-)
| 61***20 | Seal,(Fig.A2040) | 1 |
| 62***70 | Seal? Front,(Fig.A2040) | 1 |
| 62***20 | Cover | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Front Hanger(#310213-)
| 01***40 | Bolt,For Weight Adjusting Bolt | 6 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 6 |
| 62***10 | Bracket | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Fuel Control Valve (Inner Parts)(#310213-)
| 62***20 | Seal, O-Ring | 2 |
| 62***20 | Seal, O-Ring | 1 |
| 62***40 | Sensor, Coolant Temperature Assembly | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Fuel Control Valve (With Water Separator) (Inner Parts)(#310414-)
| 62***20 | Seal, O-Ring | 2 |
| 62***20 | Seal, O-Ring | 1 |
| 62***40 | Sensor, Coolant Temperature Assembly | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Fuel Control Valve (With Watre Separator)(#310414-)
| 01***85 | Bolt, Divider Valve Mounting | 2 |
| 01***00 | Bolt,(For Front Brake Release) | 2 |
| 01***55 | Bolt, Mount Dryer To Bracket And Frame | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Fuel Control Valve(#310213-)
| 01***85 | Bolt, Divider Valve Mounting | 2 |
| 01***00 | Bolt,(For Front Brake Release) | 2 |
| 01***55 | Bolt, Mount Dryer To Bracket And Frame | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Fuel Filter (Water Separator Spec.)(#310414-)
| 01***00 | Bolt,For Weight Adjusting Bolt | 3 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 01***55 | Bolt, Mount Dryer To Bracket And Frame | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Fuel Filter(#310213-)
| 01***00 | Bolt,For Weight Adjusting Bolt | 3 |
| 01***55 | Bolt, Mount Dryer To Bracket And Frame | 1 |
| 01***90 | Bolt,(For Large Fan) | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Fuel Injection Pump (Inner Parts)
| 62***20 | Plug, Threaded (M22-1.50) | 1 |
| 62***60 | Seal, O-Ring | 1 |
| 62***50 | Plug, Threaded (7/8-14 Unf) | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Fuel Injection Pump Drive(#310047-)
| 01***30 | Bolt,(Not Used When Towing Winch) | 2 |
| 01***30 | Bolt,For Weight Adjusting Bolt | 2 |
| 04***30 | Ring, Snap | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Fuel Injection Pump Mounting
| 01***15 | Bolt | 1 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 5 |
| 01***75 | Bolt (M10-1.50x75) | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Fuel Injection Pump Repair Kit
| 65***40 | Kit,Front Cover | 1 |
| 65***60 | Kit,Accessory | 1 |
| 65***70 | Kit,Gear Housing | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Fuel Injector
| 01***32 | Washer, (Without Emergency Steering) | 6 |
| 62***50 | Bolt | 6 |
| 65***10 | Injector | 6 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Fuel Return(#310213-)
| 01***95 | Bolt,(For Shipping) | 1 |
| 07***12 | Washer, Gasket,(F5350-64a0 -24 ) | 4 |
| 07***20 | Bolt,Joint | 2 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Head Cover Related Parts
| 01***45 | Bolt, Bracket Mounting | 36 |
| 01***16 | Washer,Radio Controlled Slag Handling | 36 |
| 61***20 | Rubber,(Fig.A1111) | 36 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Heat Shield(#310213-)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***45 | Bolt,(With Water Separator Type) | 3 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Heater Switch(#310213-)
| 01***12 | Bolt,(With Speedometer) | 2 |
| 08***27 | Cap, At Alternator Terminals | 2 |
| 60***90 | Relay, Ribbon Heaters | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Idler Gear
| 01***30 | Bolt | 6 |
| 01***80 | Bolt | 2 |
| 04***24 | Pin,Dowel (For No.3 Housing) | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Injection Bracket And Piping(#310213-)
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 1 |
| 01***45 | Bolt, Bracket Mounting | 2 |
| 01***60 | Bolt - Upper Cooler Inlet Tubemounting | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Muffler (Tropical Spec.)(#310213-)
| 01***85 | Bolt | 4 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Muffler Bracket(#310213-)
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***90 | Bolt | 4 |
| 01***20 | Bolt,For Weight Adjusting Bolt | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Muffler Drain Piping(#310043-)
| 01***35 | Bolt, Mount Bracket To Floor | 1 |
| 01***80 | Bolt (M10-1.50x80) | 1 |
| 01***08 | Nut,See Fig. K4010-04a0 | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Muffler Piping(#310213-)
| 01***30 | Bolt | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 4 |
| 62***40 | Joint | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Muffler(#310213-)
| 01***85 | Bolt | 4 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Name Plate And Caution Plate (For Regulation Of Epa) (For Eu Exhaust Gas Regulation)(#310024-)
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Cooler
| 01***25 | Bolt - Relay Mounting | 4 |
| 07***42 | O-Ring - Torque Converter Totransmission | 2 |
| 07***12 | Plug,(For Heater-Less) | 2 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Cooler Mounting(#310213-310515)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 25 |
| 01***30 | Bolt,(With Body Positioner) | 1 |
| 01***65 | Bolt - Return Line And Suction Linehose Clamps | 4 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Cooler Mounting(#310516-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 24 |
| 01***30 | Bolt,(With Body Positioner) | 1 |
| 01***65 | Bolt - Return Line And Suction Linehose Clamps | 4 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Filler (With Water Separator)(#310414-)
| 01***35 | Bolt,(F4320-52a0 -5 ) | 2 |
| 01***55 | Bolt,(See Service News) | 1 |
| 01***80 | Bolt,(With Corrosion Resistor) | 2 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Filler(#310213-)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 4 |
| 01***60 | Bolt,(F4320-52a0 -5- ) | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Filter(#310213-)
| 01***50 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***85 | Bolt,(Used With Pin Puller) | 2 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 5 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Level Gauge (With Water Separator)(#310414-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 61***10 | Bushing, Oil Gauge Guide | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Level Gauge (With Water Separator)(#310594-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
| 61***10 | Bushing, Oil Gauge Guide | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Level Gauge(#310213-)
| 01***25 | Bolt,(Rear Attachment Less) | 1 |
| 01***30 | Bolt,(With Body Positioner) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Level Gauge(#310594-)
| 01***25 | Bolt,(Rear Attachment Less) | 1 |
| 01***30 | Bolt,(With Body Positioner) | 1 |
| 01***06 | Nut,(With Back-Up Alarm) (Op), Nut; Was 01580-10806 | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Pan And Suction Tube (With Water Separator)(#310414-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 43 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Pan And Suction Tube (With Water Separator)(#310594-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 41 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Pan And Suction Tube(#310213-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 43 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Pan And Suction Tube(#310594-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 41 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Oil Pump
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***40 | Bolt (Op) | 2 |
| 01***30 | Bolt,(Water Separator Spec.) | 6 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Piston
| 02***13 | Pin, Dowel | 4 |
| 61***20 | Ring, Snap | 12 |
| 61***41 | Bearing Assembly, Standard | 6 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Pre Cleaner(#310213-)
| 60***50 | Precleaner | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Rear Power Take Off(#310213-310515)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***40 | Bolt,(For Operator'S Cab) | 4 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Rear Power Take Off(#310516-)
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Rocker Arm And Housing
| 01***20 | Bolt (M12-1.75x120) | 60 |
| 01***15 | Nut | 1 |
| 07***12 | O-Ring,(F4350-59a1 -17 ) | 6 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Rocker Arm Housing Cover
| 62***10 | Cover, Head | 6 |
| 62***10 | Gasket,Head Cover (K1) | 6 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Service Indcator (Tropical Spec.)(#310213-)
| 08***00 | Indicator, Dust | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Spare Parts(#310213-)
| 04***40 | V-Belt Set | 1 |
| 04***68 | V-Belt Set | 1 |
| 60***31 | Cartridge, Oil Filter | 2 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Spare Parts(#310510-)
| 04***40 | Belt, Alternator | 1 |
| 04***75 | V-Belt Set,Reversible | 1 |
| 60***31 | Cartridge, Oil Filter | 2 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Starting Motor (11kw) (Inner Parts)(#310213-310524)
| 60***10 | Starting Motor Ass'Y,(11kw) | 1 |
| KD***40 | Spring,Spring | 4 |
| KD***57 | Bearing, Ball, Front | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Starting Motor Mounitng (11kw)(#310213-)
| 01***45 | Bolt,(For 60ton Dump Body) | 6 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***08 | Nut,See Fig. K4010-04a0 | 2 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Tension Pulley (Tropical Spec.)(#310213-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 3 |
| 01***50 | Bolt,For Weight Adjusting Bolt | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Tension Pulley(#310213-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
| 01***75 | Bolt - Tube Mounting | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Thermostat Housing Blind Plug(#310043-)
| 07***15 | Plug | 1 |
| 07***16 | Plug | 1 |
| 28***70 | Plug,(For Shipping) | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Thermostat Housing(#310213-)
| 01***95 | Capscrew | 4 |
| 01***00 | Bolt,(For Front Brake Release) | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 4 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Turbocharger (S500) (Inner Parts)(#310213-)
| 62***00 | Turbocharger Ass'Y,(S500) | 1 |
| SP***87 | V-Band,Compressor Housing | 1 |
| SP***28 | Nut,Lock | 2 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Turbocharger Mounting(#310213-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 3 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 2 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Water Pump Gasket Kit(#310213-)
| 07***95 | O-Ring,Transmission Strainer | 1 |
| 07***12 | O-Ring,(Fig.A5010) | 1 |
| 07***40 | O-Ring,(Fig.A5010) | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Water Pump(#310213-)
| 01***12 | Bolt - M8 - 1.25 X 12 | 1 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***15 | Bolt | 4 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Water Pump(#310594-)
| 01***12 | Bolt - M8 - 1.25 X 12 | 1 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***15 | Bolt | 4 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Wiring (1/2) Control Valve And Sensor (With Water Separator)(#310414-)
| 01***30 | Bolt,(With Body Positioner) | 1 |
| 01***00 | Bolt,(For Front Brake Release) | 1 |
| 01***08 | Screw | 4 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Wiring (1/2) Control Valve And Sensor(#310213-)
| 01***30 | Bolt,(With Body Positioner) | 1 |
| 01***00 | Bolt,(For Front Brake Release) | 1 |
| 01***08 | Screw | 4 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Wiring (1/2)(#310213-)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 2 |
| 01***85 | Bolt, Divider Valve Mounting | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Wiring (2/2) Controller Cover (With Water Separator)(#310414-)
| 01***14 | Bolt - Fuel Sensor Mounting | 2 |
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 01***08 | Nut,See Fig. K4010-04a0 | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Wiring (2/2) Controller Cover(#310213-)
| 01***16 | Bolt - Starting Motor Ground Cable | 3 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 3 |
| 01***05 | Screw | 1 |
Komatsu : Saa6d170e-3e-8(S/N 310001-Up) : Engine : Wiring (2/2)(#310213-)
| 01***45 | Bolt,(With Water Separator Type) | 1 |
| 01***55 | Bolt,(See Service News) | 1 |
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
SAA6D170E-3E-8(S/N 310001-UP) serial number reference
The engine serial plate is riveted to the left side of the engine block, typically near the injection pump. The prefix is the full alphanumeric engine model code (e.g., SAA6D170E-3E-8) stamped on the plate, distinct from the machine chassis serial number.
| Prefix | Identifies | Notes |
|---|---|---|
| SAA6D170E-3E-8 | Engine Model | Komatsu SAA6D170E-3E-8 engine fitted to machines with serial number 310001-UP. Identified in factory parts catalogs and engine identification guides for the PC1250-7 series and WA600-3LK wheel loader. Emissions tier varies by configuration/series (Tier 2/Stage II or Tier 3/Stage IIIA depending on specific build date and region). Verify with dealer for exact emission standard on specific unit. |
Frequently asked questions
What is the engine type for the Komatsu SAA6D170E-3E-8?
It is a six-cylinder, turbocharged, aftercooled diesel engine with a displacement of approximately 16.86 liters (1,029 cu in).
What is the operating weight of the machines powered by this engine?
Operating weight varies by configuration and series. For example, the WA600-3 wheel loader weighs approximately 55,400 to 57,501 kg (122,137 to 126,766 lb), while the PC1250-7 excavator weighs significantly more, often exceeding 120,000 kg (264,555 lb) depending on the boom and stick configuration.
What replaced the SAA6D170E-3E-8 engine?
The SAA6D170E-3E-8 was succeeded by the SAA6D170E-5 and later the SAA6D170E-7 engines in subsequent machine generations like the PC1250-8 and WA600-8, which feature updated emissions compliance and electronic control systems.
What SAA6D170E-3E-8(S/N 310001-UP) owners discuss
What are the known powertrain and hydraulic behaviors for machines using the SAA6D170E-3E-8 engine?
The engine is paired with Komatsu’s hydraulic system, which is generally described as smooth and fuel-efficient. A common diagnostic pattern involves distinguishing between engine power loss and hydraulic weakness; if engine RPM drops heavily under load, the hydraulic system may be placing excessive load on the engine. If engine speed remains normal but movements become weak, the hydraulic system is the primary suspect. All functions slowing simultaneously points to shared supply, pump control, or engine performance issues, while single-function weakness points to circuit-specific components like cylinders or control valves. Hydraulics that work cold but weaken when hot indicate internal leakage or degraded oil rather than immediate pump failure. Varies by configuration/series depending on the specific machine model (e.g., PC1250-7, WA600-3, HD465-7) and attachment package. Have your dealer verify system pressures and flow rates for the specific machine configuration.
What undercarriage or wear patterns are typical for this machine type?
Komatsu excavators and dozers are engineered for durability, but components like bushings, bearings, and track pads are subjected to significant wear and tear. Worn-out bushings can lead to noise and vibration, while worn bearings may cause premature failure of the tracks. Track tension and undercarriage wear are critical maintenance items; tracks that repeatedly loosen require inspection of the adjuster and components. Mud or debris packed into the undercarriage can cause mechanical resistance and uneven wear. The line is sometimes noted for wearing out complete machines simultaneously, meaning if a major hydraulic pump fails, the engine may be near the end of its service life. Varies by configuration/series based on operating environment and duty cycle.
What are the engine quirks per the SAA6D170E-3E-8 series?
The SAA6D170E-3E-8 is a 6-cylinder, turbocharged, after-cooled diesel engine with a bore and stroke of 6.69 in (170 mm) and a piston displacement of 1413 in³ (23.15 L). It is used in models such as the PC1250-7, WA600-3, and HD465-7. The engine features a liquid cooling system and meets Tier 2/EU Stage II emissions standards. Owners and operators note that engine performance issues, such as loss of power or increased fuel usage, often signal airflow restriction, injector wear, or failing fuel delivery components. The cooling package is susceptible to clogging between heat exchangers (radiator, hydraulic oil cooler, charge-air cooler) due to dust and debris, which can cause overheating during heavy work even if the exterior appears clean. Varies by configuration/series depending on the specific emissions package and application.
What are common electrical or sensor issues reported for this engine?
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 failure, or machines that randomly shut down. Owners report that machines may display multiple fault codes due to these electrical instabilities. A battery can show acceptable voltage until the starter is loaded; if the display dims heavily or voltage collapses during starting, a load and voltage-drop test is required before replacing the starter. Grounds and connectors are frequent points of failure. Varies by configuration/series depending on the specific ECM and wiring harness revision.
What should be checked when buying a used machine with the SAA6D170E-3E-8 engine?
Verify the exact serial prefix and model code, as the SAA6D170E-3E-8 (S/N 310001-UP) is used in specific models like the PC1250LC-7, PC1250SP-7, and WA600-3LK. Check the cooling system for packed debris between heat exchangers. Inspect the hydraulic oil condition and temperature behavior; weakness when hot indicates internal leakage. Test travel functions in both forward and reverse to identify side-specific hydraulic or final drive issues. Check for worn bushings and bearings in the undercarriage. Verify the battery and starter load performance. Confirm the engine fault codes and dashboard functionality. Varies by configuration/series depending on the specific machine model and attachment package. Have your dealer verify the engine compression and hydraulic system integrity before purchase.
What are the fluid specifications for the SAA6D170E-3E-8 engine and associated systems?
Komatsu specifies Komatsu EO, TO, and AXO fluids for engine oil, hydraulic oil, and axle/powertrain applications respectively. Super-coolant AF-NAC is specified for the cooling system. Komatsu Oil/Fuel & Wear Analysis (KOWA) is recommended for monitoring fluid condition. Varies by configuration/series depending on the specific operating environment and temperature ranges.
How does the SAA6D170E-3E-8 engine differ from related variants in terms of application?
The SAA6D170E-3E-8 (S/N 310001-UP) is distinct from the SAA6D102E-2A-8 series (S/N the OEM part reference-UP) and other SAA6D170 variants. It is specifically identified in parts catalogs for the PC1250LC-7, PC1250SP-7, and WA600-3LK models. The SAA6D170 family includes various iterations (e.g., SAA6D170E-2, SAA6D170E-5, SAA6D170E-7) with different emissions tiers and control systems. The SAA6D170E-3E-8 is a Tier 2/EU Stage II compliant engine. Varies by configuration/series depending on the specific machine model and regional emissions requirements. Have your dealer verify the exact engine model plate and serial range to ensure correct service documentation and parts.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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