Komatsuengine(no series)
Komatsu SAA6D170E-2D-55(S/N 17389-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu SAA6D170E-2D-55 is a 6-cylinder, turbocharged, aftercooled diesel engine designed for heavy-duty construction and mining applications. It powers the Komatsu PC1250-7 excavator series, a 125-ton class crawler excavator engineered for mass excavation and quarry work. Production of this specific engine variant covers serial number 17389 and up. The PC1250-7 succeeded the PC1250-6 and was later replaced by the PC1250-8 series. Configurations offered include standard and long-reach boom/stick setups, with operating weights varying by attachment package and counterweight configuration.
Across generations, the SAA6D170E-2D-55 represents a transition in emissions compliance and fuel injection technology compared to earlier SAA6D170 variants. The machine matters in the used and parts market because the PC1250-7 remains a critical asset in large-scale earthmoving operations. Its robust powertrain and availability of telematics for remote health monitoring make it a reliable choice for fleet managers. The engine's design allows for extended service intervals, reducing total cost of ownership, while the widespread use of Komatsu components ensures parts availability for long-term maintenance.
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-2D-55(S/N 17389-UP) specifications
Engine
| Model | SAA6D170E-2D-55 |
| Series/Generation | SAA6D170E series; variants include SAA6D170E-7, SAA6D170E-5, SAA6D170E-3, SAA6D170E-2A-8, SAA6D170E-2 |
| Gross/Net Power | 455 kW @ 1800 rpm (D375); 533 kW (715 hp) (HD465-7); 568 kW @ 2000 rpm (WA700); 394 kW @ 1800 rpm (WA600); 550–700 hp (general SAA6D170 range) |
| Displacement | 16.86 L (1029 cu in); 23.1 L (cited for 6D170 component); 1413 cu in (23.1 L) |
| Cylinders | 6 |
| Bore x Stroke | 170 mm x 170 mm (6.69 in x 6.69 in) |
| Aspiration | Turbocharged, after-cooled, cooled EGR; variable geometry turbocharger |
| Emissions Tier | Tier 2 / EU Stage II (SAA6D170); Tier 3 / Stage IIIa (SAA6D170E-1 variants); Tier 4 Final / Stage V (varies by application and region) |
Weights
| Engine Weight | Approx. 1,700 kg (3,748 lb) |
| Operating Weight (Machine) | Varies by configuration: 55,400–57,501 kg (122,137–126,767 lb) for WA600; 74,090 kg (163,332 lb) for D375; 97,100 kg (214,067 lb) for WA700; 55 t (55,338 kg) rated payload for HD465-7 |
| Ground Pressure | Not documented for this exact serial range — verify with your dealer |
Dimensions
| Transport Length | Not documented for this exact serial range — verify with your dealer |
| Transport Width | Not documented for this exact serial range — verify with your dealer |
| Transport Height | Not documented for this exact serial range — verify with your dealer |
| Track Gauge / Wheelbase | Not documented for this exact serial range — verify with your dealer |
| Ground Clearance | Not documented for this exact serial range — verify with your dealer |
| Bucket/Blade Capacity | 18.5–22.0 m³ (24.2–28.8 cu yd) for D375; 6.4–7.8 m³ (8.4–10.2 cu yd) for WA600; 9.2 m³ (12.0 cu yd) for WA700 |
Performance
| Travel Speed | Up to 70 km/h (43.5 mph) for HD465-7 |
| Rated Payload | 55 t (55,338 kg) for HD465-7 |
| Heaped Body Capacity | 34.2 m³ (44.7 cu yd) for HD465-7 |
| Gradeability | Not documented for this exact serial range — verify with your dealer |
Service capacities (summary)
| Engine Oil | 80 L (21.1 gal) for HD465-7; Komatsu EO or equivalent recommended |
| Hydraulic System | 122 L (32.2 gal) for HD465-7; Komatsu HO or equivalent recommended |
| Cooling System | Super-coolant AF-NAC recommended; capacity not specified for SAA6D170E-2D-55 engine alone |
| Fuel Tank | Not documented for this exact serial range — verify with your dealer |
| Differential/Final Drive | 137 L (36.2 gal) for HD465-7 |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Komatsu SAA6D170E-2D-55(S/N 17389-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the SAA6D170E-2D-55(S/N 17389-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu Oil Wear Analysis (KOWA) to monitor engine oil (80 L / 21.1 gal) and hydraulic fluid (122 L / 32.2 gal) for particulate contamination. Track differential and final drive fluid levels (137 L / 36.2 gal) to prevent gear wear. Monitor coolant pH and SCA concentration to avoid overheating in the SAA6D170E-2D-55. Early detection of abnormal exhaust color or sound prevents catastrophic engine failure. Use KOMTRAX telematics to track load frequency and fault codes for proactive scheduling.
Corrective & Common Repairs
Address front brake pad wear immediately on rigid-frame applications; uneven wear indicates caliper piston or seal issues. Inspect the hydraulic system for leaks, particularly around steering and braking cylinders. If fault codes appear, use the diagnostic menu to identify specific component malfunctions. Ensure all repairs to the airtight hydraulic brake system maintain factory pressure specifications. Check turbocharger boost lines for cracks or loose clamps to maintain optimal air-to-fuel ratio.
Overhaul & Rebuild Points
Plan major overhauls around the 4000-hour milestone, focusing on full replacement of hydraulic system fluids and filtration. Inspect planetary transmission gears and the 7-speed forward/1-speed reverse gearbox for signs of fatigue. During chassis rebuildS, verify the integrity of the frame casting and check all mounting bolts for proper torque. Evaluate the condition of the SAA6D170E-2D-55 engine components if significant power loss is detected. Replace worn piston rings and cylinder liners if compression drops below spec.
Seasonal & Environment Servicing
In high-dust environments, increase frequency of air filter inspections and machine washing to prevent radiator clogging. During cold operations, verify coolant levels and ensure the cooling system is free of debris. For heavy-duty duty cycles, monitor fuel water separation closely to protect the injection system. Ensure all lubrication points are serviced regularly to mitigate the effects of abrasive grit on the chassis and articulation joints. Use appropriate viscosity engine oil for extreme temperature ranges.
SAA6D170E-2D-55(S/N 17389-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 09637-30163 | Plate? Instruction,Air Cleaner (Single Element) | Air intake service | Check fitment → |
| 6162-53-5430 | Packing,Oil Filter And Piping | Lubrication service | Check fitment → |
| 600-211-1231 | Cartridge, Oil Filter | Lubrication service | Check fitment → |
| 6162-53-5401 | Oil Filter Assembly | Lubrication service | Check fitment → |
| 6162-53-5402 | Oil Filter Ass'Y | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
SAA6D170E-2D-55(S/N 17389-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft speed sensor failure | Broken sensor, wiring issue, or connector corrosion | Replace the speed sensor and verify the voltage at the pin connector |
| CA111 | Internal engine controller fault | ECM hardware failure | Replace or reprogram the ECM |
| CA451 | Common rail pressure sensor feedback value too high | Malfunction in the rail sensor or actual overpressure condition | Diagnose the fuel rail pressure sensor or pump lines |
| CA234 | Engine overspeed | Throttle calibration error, engine load cycle issue, or operator misuse | Verify throttle calibration and engine load cycle |
| CA441 | Battery voltage too low | Weak battery or alternator failure | Replace the alternator or battery; check the voltage regulator |
| CA442 | Battery voltage too high | Alternator overcharging or regulator failure | Replace the alternator or battery; check the voltage regulator |
| AA10NX | Air cleaner clogging | Dirty or blocked air filter element | Replace the air filter |
| B@BCNS | Engine coolant overheating | Radiator blockage, fan belt failure, or low coolant level | Check radiator fins, fan belt, and coolant level |
| B@HANS | Hydraulic oil overheating | Contaminated oil, clogged filter, or cooler fan failure | Change hydraulic filter and oil; check cooler fan |
| CA122 | Intake air pressure high voltage | Faulty intake pressure sensor or wiring issue | Verify the intake pressure sensor and wiring |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
SAA6D170E-2D-55(S/N 17389-UP) attachments & work tools
Wheel Loader Attachments
The Komatsu WA700 wheel loader, equipped with the SAA6D170E engine, utilizes a standard quick coupler system for bucket interchange. Typical bucket capacities for this class range from 9.2 m³ (12.0 yd³) for standard applications, with variations available for specific material densities.
Bulldozer Attachments
The Komatsu D375 bulldozer series, powered by the SAA6D170E engine, is designed for heavy earthmoving with blade capacities ranging from 18.5 m³ to 22.0 m³ (24.2 yd³ to 28.8 yd³). Factory configurations include semi-U and U-blades with varying cutting edge profiles and guard options for rock applications.
Mining Dump Truck Bodies
The Komatsu HD465-7 rigid frame truck, featuring the SAA6D170E-5 engine, is fitted with a heaped body capacity of 34.2 m³ (44.7 yd³) for a rated payload of 55 t (55,338 kg). Body configurations are optimized for quarry and heavy mining duties with reinforced floor and side plates.
Excavator Attachments
The Komatsu PC1250-7 excavator, which utilizes the SAA6D170E-2D engine for serial numbers 17389-UP, supports standard and heavy-duty digging buckets. Hydraulic circuit arrangements require specific flow rates for high-performance breakers or grapples, necessitating verification of the auxiliary hydraulic kit configuration.
All SAA6D170E-2D-55(S/N 17389-UP) assemblies by section
Every catalogued assembly group for the Komatsu SAA6D170E-2D-55(S/N 17389-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Engine
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : After Cooler(#18553-20078)
| 62***00 | After Cooler Ass'Y | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Air Cleaner (Tropical Spec.)(#18791-20078)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 3 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Air Cleaner (Tropical Spec.)(#20079-)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 3 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Air Cleaner Mounting (Tropical Spec.)(#18791-20078)
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 4 |
| 01***40 | Bolt (Op) | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Air Cleaner Mounting (Tropical Spec.)(#20079-)
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 4 |
| 01***40 | Bolt (Op) | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Air Compressor (Inner Parts)(#18553-)
| 61***01 | Air Compressor Ass'Y | 1 |
| DK***20 | Unloader Valve A | 1 |
| DK***00 | Seat,Intake Valve | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Air Compressor Mounting(#18553-)
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 2 |
| 01***70 | Bolt - Accumulator Mounting Bracket | 2 |
| 01***75 | Bolt - Tube Mounting | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Air Compressor Piping(#18553-)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 1 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***30 | Bolt - M8 X 30lg | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Air Intake(#18553-)
| 01***30 | Bolt,(With Body Positioner) | 8 |
| 01***95 | Capscrew | 15 |
| 01***55 | Bolt,(With Corrosion Resistor) | 15 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Air Piping(#18553-)
| 01***30 | Bolt,(Not Used When Towing Winch) | 4 |
| 01***05 | Capscrew | 6 |
| 01***14 | Nut | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Alternator (50a) (Inner Parts)(#18553-)
| 60***30 | Alternator A. (50a) | 1 |
| KD***40 | Bushing,Insulate | 1 |
| KD***70 | Plate,Terminal | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Alternator (90a) (Tropical Spec.) (With Hardening Pulley) (Inner Parts)(#18553-)
| 60***30 | Alternator A. (90a) | 1 |
| 60***30 | Alternator A. (90a) | 1 |
| KD***02 | Bolt | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Alternator Drive
| 01***30 | Bolt,(With Body Positioner) | 1 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 1 |
| 04***24 | Pin, Spring | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Alternator Mounting (50a)(#18553-)
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Alternator Mounting (90a) (Tropical Spec.) (With Hardening Pulley)(#18553-)
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***40 | Bolt (Op) | 2 |
| 01***70 | Bolt - Accumulator Mounting Bracket | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Auto Primming System (1/2)(#17461-)
| 01***12 | Bolt - Front Cover Mounting | 4 |
| 01***65 | Capscrew | 8 |
| 01***19 | Washer,(Not Used With Ventilator) | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Auto Primming System (2/2)(#17461-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***90 | Bolt | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Camfollower Cover (Tropical Spec.)(#18791-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***30 | Bolt,(With Body Positioner) | 19 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Camshaft And Camfollower(#18553-19328)
| 01***32 | Washer,(Not Used With Emergency Str.) | 12 |
| 04***38 | Key | 1 |
| 04***12 | Ring, Snap (4) | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Camshaft And Camfollower(#19325-)
| 01***32 | Washer,(Not Used With Emergency Str.) | 12 |
| 04***38 | Key | 1 |
| 04***12 | Ring, Snap (4) | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Cooling Fan (Forwerded Individually Parts) (Tropical Spec.)(#18791-20078)
| 60***20 | Fan,Cooling | 1 |
| 60***50 | Fan | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Cooling Fan (Forwerded Individually Parts) (Tropical Spec.)(#20079-)
| 60***20 | Fan,Cooling | 1 |
| 60***50 | Fan | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Corrosion Resistor (1/2)
| 01***35 | Bolt,(For Fix Position) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt, Mount Bracket To Floor | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Corrosion Resistor (2/2)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***08 | Nut, Regular Hexagon (M10-1.50) | 1 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Coupling (Inner Parts)
| 65***10 | Coupling Assembly | 1 |
| DK***00 | Bolt | 1 |
| DK***00 | Washer | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Crank Pulley (Tropical Spec.)(#18791-)
| 61***20 | Washer | 6 |
| 61***22 | Bolt | 6 |
| 61***40 | Pulley? Hardening | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Crankshaft(#17461-)
| 04***28 | Key, Plain Woodruff | 1 |
| 04***24 | Pin,Dowel (For No.3 Housing) | 1 |
| 61***00 | Bearing Assembly | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Cylinder Block Mountng(#19329-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
| 08***05 | Switch,Engine Oil Pressure | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Cylinder Block(#18553-19328)
| 01***18 | Bolt | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 6 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Cylinder Block(#19325-)
| 01***18 | Bolt | 6 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 6 |
| 04***14 | Pin, Dowel | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Cylinder Head(#18553-)
| 07***28 | O-Ring,(For Transmission Screen) | 2 |
| 07***28 | O-Ring,(For Hd325-6?Hm400-1) (A2110) | 2 |
| 07***08 | Plug (Kit) | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Damper(#18553-)
| 61***01 | Damper | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Dust Sensor (Tropical Spec.)(#20079-)
| 78***20 | Sensor,Dust Indicator | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Engine Mounting(#18553-)
| 01***65 | Bolt | 6 |
| 01***65 | Hexagon Bolt | 6 |
| 01***45 | Washer,(For Quick Shift) (Mitsubishi) | 6 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Exhaust Manifold(#18553-)
| 01***90 | Bolt | 24 |
| 07***08 | Plug | 2 |
| 61***90 | Spacer | 24 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Exhaust Pipe (Tropical Spec.)(#20079-)
| 61***80 | Pipe,Ex | 1 |
| 61***90 | Pipe | 1 |
| 61***40 | Cap,Rain | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fan Belt (Tropical Spec.)(#18791-20078)
| 04***70 | V-Belt Set | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fan Belt (Tropical Spec.)(#20079-)
| 04***70 | V-Belt Set | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Flywheel Housing(#18553-)
| 01***45 | Bolt, Mount Bracket | 2 |
| 01***55 | Bolt | 6 |
| 01***70 | Bolt,R.H | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Flywheel(#18553-)
| 01***65 | Bolt | 10 |
| 61***20 | Washer, Plain (M20) | 10 |
| 61***02 | Flywheel Ass'Y | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Front Cover Mounting Parts(#19329-)
| 01***25 | Bolt,(For Slag Handling) | 2 |
| 01***16 | Bolt - Seat And Tether Belt Mounting | 12 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Front Cover(#18553-19328)
| 01***25 | Bolt,(For Slag Handling) | 2 |
| 01***35 | Bolt | 4 |
| 01***40 | Capscrew | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Front Cover(#19329-)
| 01***35 | Bolt,(For Pedal Steering) | 4 |
| 01***40 | Bolt,(Not Used With Cab) | 2 |
| 01***50 | Screw | 3 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Front Power Take Off
| 01***25 | Bolt,(Rear Attachment Less) | 6 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 6 |
| 04***18 | Ring, Snap | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Control Harness Mounting
| 01***16 | Bolt - Seat And Tether Belt Mounting | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 3 |
| 01***50 | Bolt,For Weight Adjusting Bolt | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Controller (E.C. Regulation)(#19218-19600)
| 78***03 | Controller,(Forwarded Individually Parts) | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Controller (E.C. Regulation)(#19601-)
| 78***05 | Controller,(Chassis Mount) | 1 |
| 78***06 | Controller,(Chassis Mount) | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Controller(#18553-19217)
| (7***2) | Controller,(Forwarded Individually Parts) | 1 |
| (7***1) | Controller,(Forwarded Individually Parts) | 1 |
| (7***0) | Controller,(Forwarded Individually Parts) | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Filter(#18553-)
| 01***65 | Bolt - Return Line And Suction Linehose Clamps | 6 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 6 |
| 01***16 | Washer,(With Shoe Slip Control) | 6 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Inner Parts)(#18553-)
| 01***45 | Bolt | 4 |
| 01***80 | Bolt | 6 |
| 04***14 | Pin, Dowel | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Inner Parts)(#18553-)
| 01***30 | Bolt | 1 |
| 01***80 | Bolt | 2 |
| 01***08 | Washer,(For 1 Attachment And Pat) | 8 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#18553-)
| 01***12 | Bolt (M8-1.25x12) | 2 |
| 01***35 | Screw | 4 |
| 01***30 | Bolt | 6 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#18553-)
| 01***08 | Nut, Regular Hexagon (M10-1.50) | 12 |
| 01***32 | Washer,(With Auto Emergency Steering) | 12 |
| 65***10 | Holder | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Injection Pump Bracket And Piping (1/2)(#17389-20587)
| 01***20 | Bolt,(Without Air Con. Or Heater) | 2 |
| 01***25 | Capscrew | 1 |
| 01***30 | Screw | 5 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Injection Pump Bracket And Piping (1/2)(#20588-)
| 01***20 | Bolt,(Without Air Con. Or Heater) | 2 |
| 01***30 | Screw | 4 |
| 01***35 | Bolt,(For Fix Position) | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Injection Pump Bracket And Piping (2/2)(#17389-20587)
| 04***10 | Clip - Fuel Sensor Harness | 2 |
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 2 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Injection Pump Bracket And Piping (2/2)(#20588-)
| 04***10 | Clip - Fuel Sensor Harness | 2 |
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 2 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Injection Pump Drive
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 5 |
| 01***12 | Nut | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Injection Pump Mounting(#18553-)
| 01***05 | Bolt | 2 |
| 01***32 | Washer, (Without Emergency Steering) | 2 |
| 62***30 | Dowel, Ring | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Lift Pump
| 01***50 | Bolt,(Spark Arrester Spec.) | 3 |
| 01***14 | Bolt - Plate Mounting | 3 |
| 01***32 | Washer,(With Auto Emergency Steering) | 3 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Fuel Return(#18553-)
| 01***55 | Bolt,(See Service News) | 2 |
| 01***70 | Bolt - Bracket And Oil Inlet Tubemounting | 1 |
| 01***85 | Bolt, Divider Valve Mounting | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Head Cover Related Parts(#19325-)
| 01***55 | Bolt,(See Service News) | 28 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 28 |
| 01***16 | Washer,(With Shoe Slip Control) | 28 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Head Cover(#17389-19324)
| 01***55 | Bolt,(See Service News) | 28 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 28 |
| 01***16 | Washer,(With Shoe Slip Control) | 28 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Heat Shield (1/3) (For Spill Pipe) (Tropical Spec.)(#18791-18925)
| 01***95 | Bolt | 4 |
| 20***70 | Spacer,(F4320-51a0 -15 ) | 4 |
| 61***70 | Washer | 8 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Heat Shield (1/3) (For Spill Pipe) (Tropical Spec.)(#18926-20078)
| 01***95 | Capscrew | 4 |
| 01***95 | Bolt | 4 |
| 20***70 | Spacer,(F4320-51a0 -15 ) | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Heat Shield (1/3) (For Spill Pipe) (Tropical Spec.)(#20079-)
| 01***95 | Capscrew | 4 |
| 20***70 | Spacer,(F4320-51a0 -15 ) | 4 |
| 61***70 | Washer | 8 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Heat Shield (2/3) (For Exhaust Manifold And Turbochager) (Tropical Spec.)(#18791-18925)
| 01***35 | Bolt,(F4320-52a0 -5 ) | 3 |
| 01***20 | Bolt | 14 |
| 01***25 | Bolt,Joint | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Heat Shield (2/3) (For Exhaust Manifold And Turbochager) (Tropical Spec.)(#18926-20078)
| 01***20 | Bolt,(For Mono Lever Steering) | 16 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***30 | Bolt,(With Body Positioner) | 3 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Heat Shield (2/3) (For Exhaust Manifold And Turbochager) (Tropical Spec.)(#20079-)
| 01***20 | Bolt,(For Mono Lever Steering) | 16 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Heat Shield (3/3) (For Muffler) (Tropical Spec.)(#18791-18925)
| 01***20 | Bolt | 7 |
| 01***25 | Bolt,Joint | 6 |
| 01***30 | Bolt | 3 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Heat Shield (3/3) (For Muffler) (Tropical Spec.)(#18926-20078)
| 01***20 | Bolt | 12 |
| 01***25 | Bolt,Joint | 4 |
| 01***30 | Bolt | 3 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Heat Shield (3/3) (For Muffler) (Tropical Spec.)(#20079-)
| 01***20 | Bolt | 12 |
| 01***25 | Bolt,Joint | 4 |
| 01***30 | Bolt | 3 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Heat Shield (For Muffler) (Tropical Spec.)(#20079-)
| 01***20 | Bolt | 12 |
| 01***25 | Bolt,Joint | 4 |
| 01***30 | Bolt | 3 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Holder (Inner Parts)(#18553-)
| 61***10 | Holder Ass'Y | 6 |
| 61***11 | Holder Ass'Y | 6 |
| DK***00 | Shim? 0.80mm | 0 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Idler Gear
| 01***35 | Bolt,(Not Shown) | 6 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 6 |
| 01***45 | Washer,(Without R.O.P.S.) | 3 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Injection Nozzle(#18553-)
| 07***14 | Tube, Spill | 5 |
| 07***80 | Clip | 10 |
| 61***10 | Bolt,Nozzle Holder | 12 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Lift Pump (Inner Parts)
| 65***00 | Lift Pump Assembly | 1 |
| DK***00 | Valve,Check | 4 |
| DK***20 | Bolt,Joint | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Muffler (Tropical Spec.)(#20079-)
| 01***85 | Bolt | 4 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 4 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Muffler Drain Tube (Tropical Spec.) (E.C. Regulation)(#20079-)
| 01***35 | Bolt | 1 |
| 01***54 | Washer,Spring (D65p) | 1 |
| 01***26 | Plain Washer | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Muffler Flange (Tropical Spec.) (E.C. Regulation)(#20079-)
| 01***30 | Bolt | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
| 61***32 | Joint | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Muffler Mounting (Tropical Spec.)(#18791-20078)
| 01***35 | Bolt | 1 |
| 01***70 | Bolt | 4 |
| 01***85 | Bolt | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Muffler Mounting (Tropical Spec.)(#20079-)
| 01***70 | Bolt | 4 |
| 01***32 | Washer, (Without Emergency Steering) | 4 |
| 61***70 | Bracket | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Name Plate And Caution (English)(#18553-20067)
| 04***50 | Screw | 4 |
| 09***30 | Plate? Name,(English) (Limited Supply) | 1 |
| 09***63 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Oil Bypass Filter (Tropical Spec.)(#18791-)
| 01***35 | Bolt,(F4320-52a0 -5 ) | 4 |
| 01***40 | Bolt (Op) | 6 |
| 01***50 | Bolt,(Spark Arrester Spec.) | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Oil Cooler Mounting Parts(#19325-)
| 01***25 | Bolt,(Rear Attachment Less) | 6 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 5 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Oil Cooler(#18760-19328)
| 01***16 | Bolt - Box Mounting | 10 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***25 | Bolt,(Rear Attachment Less) | 6 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Oil Cooler(#19325-)
| 01***16 | Bolt - Box Mounting | 10 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***65 | Capscrew | 3 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Oil Filler
| 01***30 | Bolt,(With Body Positioner) | 9 |
| 01***10 | Bolt | 2 |
| 01***08 | Nut, Regular Hexagon (M10-1.50) | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Oil Filter(#17461-)
| 01***40 | Bolt,For Weight Adjusting Bolt | 3 |
| 01***45 | Bolt, Mounting Cranking Motor | 6 |
| 01***50 | Bolt,For Weight Adjusting Bolt | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Oil Level Gauge(#18553-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 1 |
| 01***70 | Bolt - Bracket And Oil Inlet Tubemounting | 1 |
| 01***06 | Nut, Regular Hexagon (M8-1.25) | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Oil Pan And Suction Tube(#18553-)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***30 | Bolt,(With Body Positioner) | 47 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Oil Pump
| 01***70 | Bolt - Bracket And Oil Inlet Tubemounting | 2 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 4 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 6 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Piston
| 02***13 | Pin, Dowel | 4 |
| 61***10 | Pin. Piston | 6 |
| 61***80 | Piston Ring Ass'Y,Per Cylinder | 6 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Pre Cleaner (Tropical Spec.)(#20079-)
| 41***10 | Pre-Cleaner Assembly | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Rocker Arm And Housing(#18553-19328)
| 01***55 | Bolt - Mount Cage To Transmission Case | 6 |
| 01***90 | Bolt,For Weight Adjusting Bolt | 36 |
| 01***15 | Bolt | 6 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Rocker Arm And Housing(#19329-)
| 61***10 | Housing, Rocker Arm (No. 1,2,5,6) | 2 |
| 61***10 | Housing,Rocker Arm? No.1?3?4?5 | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Rocker Arm Housing Cover(#19325-)
| 61***12 | Cover,Head | 6 |
| 61***81 | Packing,Nozzle Holder (K1) | 6 |
| 61***12 | Gasket, Head Cover | 6 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Rocker Arm(#19325-)
| 01***55 | Bolt - Mount Cage To Transmission Case | 6 |
| 01***90 | Bolt,For Weight Adjusting Bolt | 36 |
| 01***15 | Bolt | 6 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Safety Guard(#17461-)
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
| 01***55 | Bolt,(See Service News) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 5 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Spare Parts (Tropical Spec.)(#18791-20078)
| 04***34 | V-Belt | 1 |
| 04***70 | V-Belt Set | 1 |
| 60***70 | Nut, Wing | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Spare Parts (Tropical Spec.)(#20079-)
| 04***34 | V-Belt | 1 |
| 04***70 | V-Belt Set | 1 |
| 60***70 | Nut, Wing | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Starting Motor (7.5kw) (L.H.) (Tropical Spec.) (Inner Parts)(#18791-20673)
| 60***20 | Starting Motor Ass'Y,(7.5kw) | 1 |
| KD***20 | Magnetic Switch Assembly | 1 |
| KD***40 | Spring,Spring | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Starting Motor (7.5kw) (L.H.) (Tropical Spec.) (Inner Parts)(#20674-)
| 60***21 | Starting Motor Ass'Y,(7.5kw) | 1 |
| KD***20 | Magnetic Switch Assembly | 1 |
| KD***40 | Spring,Spring | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Starting Motor (7.5kw) (R.H.) (Tropical Spec.) (Inner Parts)(#18791-20502)
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Starting Motor (7.5kw) (R.H.) (Tropical Spec.) (Inner Parts)(#20503-)
| 60***31 | Starting Motor Ass'Y,(7.5kw) | 1 |
| KD***20 | Magnetic Switch Assembly | 1 |
| KD***40 | Spring,Spring | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Starting Motor Mounting (7.5kw) (Tropical Spec.)(#18791-)
| 01***45 | Bolt,(For Slag Handling) | 6 |
| 01***45 | Capscrew - M16 | 6 |
| 01***20 | Bolt,(For Mono Lever Steering) | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Tension Pulley (Remote Grease Piping)(#18553-18759)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***70 | Bolt | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Tension Pulley (Remote Grease Piping)(#18760-)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***70 | Bolt | 2 |
| 01***70 | Bolt | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Tension Pulley(#18553-18759)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 3 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Tension Pulley(#18760-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***35 | Bolt, Mount Ground Driven Steering Pump | 3 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Thermostat Housing (Tropical Spec.)(#18791-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***30 | Bolt,(With Body Positioner) | 5 |
| 01***40 | Bolt (Op) | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Turbocharger (Tropical Spec.) (Inner Parts)(#18791-)
| 01***16 | Bolt | 4 |
| 01***16 | Bolt | 8 |
| 01***16 | Bolt | 8 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Turbocharger Lubricating Oil Piping (Tropical Spec.)(#18791-)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 1 |
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Turbocharger Mounting (Tropical Spec.)(#18791-)
| 61***90 | Nut, Mounting | 4 |
| 61***10 | Gasket,Turbocharger Mounting | 1 |
| 61***40 | Bolt | 4 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Turbocharger Water Piping (Tropical Spec.)(#18791-)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***70 | Bolt - Bracket And Oil Inlet Tubemounting | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Water Manifold
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 1 |
| 01***16 | Washer,Radio Controlled Slag Handling | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Water Pump And Piping(#18553-)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***30 | Bolt,(With Body Positioner) | 7 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Water Temperature(#18760-)
| 01***12 | Bolt - Front Cover Mounting | 1 |
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 1 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Wiring (1/2)(#18553-20078)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Mono Lever Steering) | 5 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Wiring (2/2)(#18853-20078)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 01***70 | Bolt - Accumulator Mounting Bracket | 1 |
| 01***75 | Bolt - Tube Mounting | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Wiring (E.C. Regulation) (1/2)(#20079-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***20 | Bolt,(For Mono Lever Steering) | 5 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
Komatsu : Saa6d170e-2d-55(S/N 17389-Up) : Engine : Wiring (E.C. Regulation) (2/2)(#20079-)
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 01***70 | Bolt - Accumulator Mounting Bracket | 1 |
| 01***75 | Bolt - Tube Mounting | 2 |
SAA6D170E-2D-55(S/N 17389-UP) 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. The prefix is the first three characters of the 17-character ISO PIN (e.g., KMT), identifying the manufacturer as Komatsu.
| Prefix | Identifies | Notes |
|---|---|---|
| SAA6D170E-2D-55 | Engine Model | Komatsu SAA6D170E-2D-55 engine. Serial range 17389-UP. Used in PC1250-7 excavators (S/N 20001-Up). SAA6D170E-3E (S/N 310005-Up) is a separate variant for later PC1250-7 builds. SAA6D170E-5 is used in PC1250-8. SAA6D170E-7 is used in WA700/WA600/D375. SAA6D170E-2D-55 is distinct from SAA6D102E variants. |
Frequently asked questions
What engine does the Komatsu SAA6D170E-2D-55 power?
It powers the Komatsu PC1250-7 excavator series, a 125-ton class crawler excavator.
What is the operating weight of the machine?
Operating weight varies by configuration, attachment package, and counterweight setup. Consult the specific serial range specification sheet for exact values.
What replaced the Komatsu PC1250-7?
The PC1250-8 series replaced the PC1250-7, featuring updated emissions compliance and powertrain improvements.
What SAA6D170E-2D-55(S/N 17389-UP) owners discuss
What are the known powertrain and hydraulic behaviors for the Komatsu SAA6D170E-2D-55 engine series?
The SAA6D170E-2D-55 is a 6-cylinder, turbo-charged diesel engine with a displacement of 1413 cu in (23.2 L). It typically delivers net power in the range of 533 kW (715 hp) to 568 kW depending on the specific machine application (e.g., rigid dump truck vs. wheel loader). The engine is paired with a full-automatic, planetary-type transmission featuring 7 forward gears and 1 reverse gear in truck applications. Hydraulic systems in machines using this engine series are known for smooth operation and high fuel efficiency. A common diagnostic pattern is that if all hydraulic functions (boom, arm, bucket, swing, travel) become slow simultaneously, the issue is likely shared (hydraulic oil level, filters, engine speed, or pump control) rather than a single cylinder failure. If only one function is slow, the main pump is less likely the cause, pointing instead to the specific control valve, cylinder, or load-holding valve for that circuit. Hydraulics that work well when cold but become weak when hot indicate excessive internal leakage that worsens as oil viscosity decreases, suggesting pump wear, main control valve leakage, or degraded oil rather than a simple temperature issue.
What undercarriage or wear patterns are typical for machines powered by this engine series?
Machines equipped with the SAA6D170E series, such as the HD465-7 rigid dump truck, utilize a hydro-pneumatic suspension system and an airtight, fully hydraulic front brake system. Undercarriage wear patterns often involve uneven brake pad wear between inner and outer pads, which can indicate caliper piston or seal issues. For crawler applications, track tension and undercarriage wear are critical; machines that pull to one side should have mechanical resistance (track tension, mud packing, roller condition) checked before diagnosing travel motors or final drives. Final drives and planetary transmission gears should be inspected for fatigue signs, particularly around the 4000-hour maintenance milestone. In high-dust environments, increased frequency of undercarriage cleaning is required to prevent abrasive grit damage to chassis and articulation joints.
What are the common engine quirks and maintenance intervals for the SAA6D170E-2D-55?
The SAA6D170E-2D-55 engine has an engine oil capacity of 86 liters (21.1 US gal) when filled with the filter. The factory maintenance schedule specifies an extended 500-hour engine oil change interval for related SAA6D170E-5 variants, though specific intervals for the -2D-55 should be verified against the machine's operation and maintenance manual. Common quirks include sensitivity to air and fuel restrictions; loss of power under load is frequently caused by clogged air filters, restricted fuel filters, or air entering the fuel supply. Engine overheating is often due to material packed between heat exchangers (radiator, hydraulic oil cooler, charge-air cooler) rather than internal failure. Abnormal exhaust color or sound should be monitored early to prevent catastrophic failure. The engine uses Komatsu EO 15W40DH oil specification.
What are the common electrical and sensor issues reported for this engine?
Komatsu machines with this engine series rely heavily on electronic control systems, where a single faulty sensor or unstable power supply can trigger multiple warning signals. Common electrical issues include intermittent starting, dashboard failures, and random shutdowns. Specific fault codes associated with this engine family include CA111 (Engine controller internal malfunction), CA144 (Coolant temperature sensor high error), CA234 (Engine overspeed), CA441 (Battery voltage low error), and CA451 (Common rail pressure sensor high error). Owners report that intermittent starting and dashboard failures often stem from unstable power supplies or faulty sensors rather than major engine component failure. Battery state of charge and terminal integrity are critical, as a battery may show acceptable voltage until the starter is loaded.
What should be checked when buying a used machine with the SAA6D170E-2D-55(S/N 17389-UP) engine?
When evaluating a used machine with the SAA6D170E-2D-55 engine (S/N 17389-UP), verify the exact serial-prefix specification sheet and installed attachment package, as these affect weight, reach, and fuel use. Check the condition of the SAA6D170E engine components if significant power loss is detected. Inspect the planetary transmission gears and 7-speed forward/1-speed reverse gearbox for signs of fatigue. Verify the integrity of the frame casting and check all mounting bolts for proper torque. Test the hydraulic system cold and hot to identify internal leakage that may be less obvious when cold. Monitor differential and final drive fluid levels (137 L / 36.2 gal total for diff and final drive in truck applications) to prevent gear wear. Ensure all repairs to the airtight hydraulic brake system maintain factory pressure specifications. Confirm the exact serial range against OEM literature, as specs vary by configuration and region.
What are the critical safety considerations for the braking and suspension systems in machines using this engine?
Machines powered by the SAA6D170E series, such as the HD465-7, feature an airtight, fully hydraulic front brake system and hydro-pneumatic suspension. Front brake pad wear must be addressed immediately; uneven wear indicates caliper or seal issues. All repairs to the airtight hydraulic brake system must maintain factory pressure specifications to ensure driver safety at high speeds (up to 70 km/h). The hydro-pneumatic suspension system requires regular inspection of auto suspension piping and solenoid valves. Have your dealer verify the integrity of the frame casting and mounting bolts during chassis rebuildS to ensure structural safety.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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