Komatsuengine(no series)
Komatsu S6D108-1F-6(S/N 10001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu S6D108-1F-6 engine (S/N 10001-UP) is a 6-cylinder, inline, water-cooled, turbocharged diesel powerplant used in mid-size Komatsu construction equipment. It is commonly found in the PC300-5, PC300-6, PC350-6, and WA380-3 series excavators and wheel loaders. These machines typically operate in the 20,000 to 35,000 lb weight range. The S6D108-1F-6 succeeded earlier naturally aspirated and early turbo variants in the 6D108 family and was later replaced by the SAA6D108E-2 series to meet stricter emissions standards. Configurations offered include standard and high-power output ratings, with the engine integrated into various chassis and hydraulic packages depending on the host machine model.
Across the S6D108 series generations, primary changes involved the transition from mechanical to electronic fuel injection and the addition of intercooling and advanced turbocharging to improve efficiency and reduce emissions. The S6D108-1F-6 specifically represents a refined iteration within the -1 series, featuring updated calibration and component durability for Tier 2/interim Tier 3 compliance. This engine is critical in the used and parts market because it powers a high-volume generation of reliable, mid-size excavators that are still heavily deployed in earthmoving and utility work. Its widespread use ensures a robust aftermarket support network, making it a critical reference point for fleet maintenance and rebuild planning.
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 S6D108-1F-6(S/N 10001-UP) specifications
Engine
| Model | S6D108-1F-6 |
| Configuration | Inline 6-cylinder, 4-stroke, water-cooled, turbocharged diesel engine with intercooler |
| Displacement | 8.3 L (506.4 cu in) |
| Bore × Stroke | 108 mm × 120 mm (4.25 in × 4.72 in) |
| Gross Power | 118–140 kW (158–188 hp) |
| Net Power | 118–140 kW (158–188 hp) |
| Emissions Tier | Not documented for this exact serial range — verify with your dealer |
Weights
| Operating Weight | Not documented for this exact serial range — verify with your dealer |
| Shipping Weight | Not documented for this exact serial range — verify with your dealer |
| 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 | Not documented for this exact serial range — verify with your dealer |
| Ground Clearance | Not documented for this exact serial range — verify with your dealer |
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)
| 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 |
| 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 |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Komatsu S6D108-1F-6(S/N 10001-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 S6D108-1F-6(S/N 10001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize KOWA fluid analysis at every 500-hour interval to monitor engine wear metals (iron, copper, lead, aluminum) and contaminants (silicon, sodium). Track hydraulic oil particle count and viscosity to detect pump or valve wear early. Monitor coolant pH, SCA concentration, and glycol content to prevent corrosion and cavitation in the S6D108-1F-6 block. Analyze fuel dilution and soot levels in the engine oil to assess combustion efficiency and filter performance. Use KOMTRAX telematics data to correlate load frequency and fault codes with fluid degradation trends, allowing for condition-based service rather than rigid hour-only scheduling.
Corrective & Common Repairs
Address common S6D108-1F-6 issues by inspecting the turbocharger for shaft play and seal leaks during 1,000-hour services. Check the double-element air cleaner for clogging and housing integrity to prevent dust ingestion. Inspect fuel lines and injectors for leaks or clogging, which can cause rough idling or power loss. Examine the oil cooler for internal cross-contamination between engine oil and coolant. Replace worn belts and hoses during the 2,000-hour service if cracks or glazing are evident. Verify the operation of the water separator and fuel pre-filter to protect the high-pressure injection system from water and particulate damage.
Overhaul & Rebuild Points
Plan for an in-frame overhaul of the S6D108-1F-6 around 11,731 hours, utilizing specific rebuild kits for pistons, rings, liners, and bearings. Monitor compression and blow-by rates to determine the need for cylinder liner replacement. Inspect the crankshaft main and rod bearings for wear during major services. Check the camshaft and valve train components for wear, especially if valve adjustment checks reveal excessive clearance. Consider an out-of-frame overhaul if the cylinder block shows cracks or severe scoring. Ensure all gaskets and seals are replaced with OEM-quality components to maintain proper oil pressure and cooling system integrity during reassembly.
Seasonal & Environment Servicing
In cold climates, ensure the cooling system uses the correct Super-coolant AF-NAC concentration to prevent freezing and maintain proper heat transfer. Check battery charge and insulation for cold-start reliability. In dusty environments, inspect the air filter restriction indicator more frequently and clean the radiator and oil cooler fins daily to prevent overheating. In high-humidity or coastal areas, inspect hydraulic hoses and electrical connectors for corrosion and moisture ingress. Adjust grease intervals for undercarriage components based on exposure to mud, sand, or abrasive materials to extend track and roller life.
S6D108-1F-6(S/N 10001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 600-311-9100 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| 600-311-8293 | Cartridge, Fuel Filter | Fuel system service | Check fitment → |
| 09637-02161 | Plate? Instruction,Air Cleaner (Double Element) | Air intake service | Check fitment → |
| 09637-30161 | Plate? Instruction,Air Cleaner (Single Element) | Air intake service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
S6D108-1F-6(S/N 10001-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 voltage at the pin connector |
| CA111 | Internal engine controller fault | ECM hardware failure | Replace or reprogram the ECM |
| CA441 | Battery voltage too low | Weak battery or charging system 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 |
| CA122 | Intake air pressure high voltage | Sensor malfunction or actual overpressure condition | Verify the intake pressure sensor and wiring |
| CA123 | Intake air pressure low voltage | Sensor short or airflow restriction | Check for a sensor short or an airflow restriction |
| CA153 | Intake air temperature sensor error (high) | Sensor failure or wiring issue | Replace or test the IAT sensor |
| CA154 | Intake air temperature sensor error (low) | Sensor failure or wiring issue | Replace or test the IAT sensor |
| 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 |
| CA452 | Common rail pressure sensor feedback value too low | Sensor failure or fuel supply issue | Diagnose the fuel rail pressure sensor or pump lines |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
S6D108-1F-6(S/N 10001-UP) attachments & work tools
Excavator Attachments
The S6D108-1F-6 engine is primarily associated with the PC300-6 series excavators (serial 30001 and up) and PC350-6 series, which utilize standard quick coupler systems for bucket and breaker tooling. Factory guarding options include high-durability undercarriage components and reinforced boom structures designed for heavy digging applications.
Wheel Loader Attachments
For the WA380-3 wheel loader series, the engine supports standard bucket configurations with capacities varying by material density, typically ranging from 3.0 to 4.5 cubic meters. Compatible work tools include multi-purpose, rock, and light material buckets, often mounted via a proprietary quick-attach frame system.
Dozer Attachments
While the S6D108-1F-6 is not the primary engine for the D57S-1B dozer (which uses the S6D108-1B), the engine family is linked to the D57S series in overhaul documentation, indicating compatibility with standard straight and angle dozer blades. Guarding options for this class typically include heavy-duty track guards and blade edge replacements.
Hydraulic & Mounting Systems
Work tools for these machines require specific hydraulic kit arrangements to match the flow and pressure ratings of the host equipment's main pump. Mounting systems vary by machine type, utilizing either mechanical quick-couplers for loaders or hydraulic quick-attach systems for excavators, requiring verified flow rates to prevent tool damage.
All S6D108-1F-6(S/N 10001-UP) assemblies by section
Every catalogued assembly group for the Komatsu S6D108-1F-6(S/N 10001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Engine
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Air Cleaner (Double Element Type) (With Dust Indicator Electronic)(#20101-)
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 5 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 5 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Air Cleaner (Double Element Type)(#15882-25362)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 5 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 5 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Air Cleaner (Double Element Type)(#25363-)
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 5 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 5 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Air Cleaner (With Air Compressor)(#22802-)
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 4 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 5 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Air Cleaner (With Intake Extension Pipe) (With Air Compressor)(#22802-)
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 5 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 4 |
| 01***32 | Washer,(With Auto Emergency Steering) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Air Compressor (Inner Parts)(#22802-)
| 62***11 | Air Compressor Ass'Y | 1 |
| DK***00 | Guide,Spring | 1 |
| DK***00 | Connecting Rod A | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Air Compressor Mounting(#22802-)
| 01***20 | Bolt,(Forwarded Individually Parts) | 3 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***35 | Bolt, Mount Bracket To Floor | 4 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Air Compressor Piping (Air)(#22802-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 3 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 1 |
| 01***35 | Bolt, Mount Bracket To Floor | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Air Compressor Piping (Water)(#22802-)
| 01***14 | Bolt,(W/Joy Stick Str.)(W/O Heater) | 1 |
| 01***30 | Bolt,(Water Separator Spec.) | 1 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 4 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Air Intake Manifold(#19433-)
| 01***35 | Bolt, Cover | 3 |
| 01***50 | Screw | 24 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 3 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Alternator (35a) (With Air Compressor) (Inner Parts)(#22802-)
| 60***20 | Alternator A. (35a),(With Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Alternator (50a) (Inner Parts)(#20118-21370)
| 60***90 | Alternator A. (50a),(With Hardening Pulley) | 1 |
| SD***X0 | Washer | 1 |
| SD***X0 | Fan | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Alternator (50a) (Inner Parts)(#21371-)
| 60***60 | Alternator A. (50a),(With Hardening Pulley) | 1 |
| SD***X0 | Coil Assembly | 1 |
| SD***X0 | Washer | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Alternator (50a) (With Air Compressor) (Inner Parts)(#22802-)
| 60***60 | Alternator A. (50a),(With Hardening Pulley) | 1 |
| SD***X0 | Coil Assembly | 1 |
| SD***X0 | Washer | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Alternator Mounting (35a) (With Air Compressor)(#22802-)
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 1 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Alternator Mounting (35a)(#20118-)
| 01***70 | Bolt,(With Wear Guard) | 1 |
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***60 | Bolt, Mounting | 2 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Alternator Mounting (50a) (With Air Compressor)(#22802-)
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 1 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Alternator Mounting (50a)(#20118-21370)
| 01***70 | Bolt,(With Wear Guard) | 1 |
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***60 | Bolt, Mounting | 2 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Alternator Mounting (50a)(#21371-)
| 01***70 | Bolt,(With Wear Guard) | 1 |
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***60 | Bolt, Mounting | 2 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Block Heater (Cold Terrain Spec.)(#20101-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 6 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 1 |
| 01***16 | Washer,Radio Controlled Slag Handling | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Camshaft And Tappet
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 04***16 | Fitting Wedge | 1 |
| 62***31 | Thrust Washer | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Cooling Fan(#15614-)
| 01***10 | Screw | 6 |
| 60***00 | Fan,Cooling | 1 |
| 62***10 | Adaptor | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Corrosion Resistor(#16016-)
| 01***50 | Bolt,(For Shipping) | 2 |
| 01***12 | Washer,(With Body Positioner) | 2 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 6 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Crank Pulley(#19433-)
| 01***45 | Bolt,Nylock | 1 |
| 61***20 | Collar,Taper | 1 |
| 61***31 | Plate | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Crankshaft(#10001-15613)
| 61***40 | Fitting Wedge | 1 |
| 62***10 | Crankshaft Bearing | 7 |
| 62***50 | Thrust Metal Ass'Y | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Crankshaft(#15614-)
| 61***40 | Fitting Wedge | 1 |
| 62***10 | Crankshaft Bearing | 7 |
| 62***50 | Thrust Metal Ass'Y | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Cylinder Block (With Air Compressor)(#22802-)
| 01***20 | Screw | 2 |
| 04***14 | Pin, Dowel | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Cylinder Block Gasket Kit(#19433-)
| 07***18 | O-Ring,(See Fig.1601-29?1602-17) | 1 |
| 07***22 | O-Ring,(See Fig.Y1852-01a0) | 1 |
| 07***28 | O-Ring, Strainer To Control Pump Line | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Cylinder Block Plate (Without Block Heater)(#15614-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 1 |
| 01***16 | Washer,Radio Controlled Slag Handling | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Cylinder Block(#15614-)
| 01***20 | Screw | 2 |
| 04***14 | Pin, Dowel | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Cylinder Block(#20101-)
| 01***20 | Screw | 2 |
| 04***14 | Pin, Dowel | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Cylinder Head Gasket Kit(#19433-)
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 4 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 4 |
| 08***14 | Band,(For Additional Fuel Strainer) | 3 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Cylinder Head(#15614-)
| 07***08 | Plug,(Without Lock-Up), Plug | 7 |
| 07***10 | Plug, Expansion | 9 |
| 07***16 | Plug | 17 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Damper(#15614-)
| 01***45 | Bolt, Bracket Mounting | 6 |
| 62***10 | Pulley?Non Hardening,(For Air Conditioner) | 1 |
| 62***20 | Damper Ass'Y | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Engine Mounting (For Mechanical Governor) (With Air Compressor)(#22802-)
| 01***40 | Bolt,For Weight Adjusting Bolt | 8 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 8 |
| 42***20 | Bracket,R.H | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Engine Mounting (For Mechanical Governor)(#20749-)
| 01***40 | Bolt,For Weight Adjusting Bolt | 8 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 8 |
| 42***20 | Bracket,R.H | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Exhaust Manifold (With Air Compressor)(#22802-)
| 01***25 | Grub Screw | 4 |
| 01***60 | Bolt - Upper Cooler Inlet Tubemounting | 2 |
| 01***80 | Bolt (M10-1.50x80) | 9 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Exhaust Manifold(#15882-)
| 01***25 | Grub Screw | 4 |
| 01***60 | Bolt - Upper Cooler Inlet Tubemounting | 2 |
| 01***80 | Bolt (M10-1.50x80) | 10 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Flywheel Housing (With Revolution Sensor)(#15882-)
| 01***45 | Bolt,(Noise Abatement Part) | 11 |
| 01***55 | Bolt,(With Joy Stick Steering) | 2 |
| 01***16 | Bolt,(With Alternator Cover Type) | 2 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Flywheel Housing(#15614-)
| 01***45 | Bolt,(Noise Abatement Part) | 11 |
| 01***55 | Bolt,(With Joy Stick Steering) | 2 |
| 07***12 | Washer, Gasket,(Without Thermo Sensor) (K1) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Flywheel(#15882-)
| 01***35 | Screw | 8 |
| 61***61 | Washer, Plain (14mm) | 8 |
| 62***90 | Ring Gear | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Front Cover (With Air Compressor) (Gear Box 7/8-18ns)(#22802-)
| 01***20 | Bolt,(Forwarded Individually Parts) | 4 |
| 01***55 | Screw | 6 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 8 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Front Cover (With Air Compressor) (Gear Box M22x1.5)(#22802-)
| 01***20 | Bolt,(Forwarded Individually Parts) | 4 |
| 01***55 | Screw | 6 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 8 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Front Cover (With Tachometer Outlet) (Gear Box 22x1.5)(#17248-)
| 01***20 | Bolt,(Forwarded Individually Parts) | 4 |
| 01***55 | Screw | 6 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 4 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Front Cover (With Tachometer Outlet) (Gear Box 7/8-18ns)(#15614-)
| 01***20 | Bolt,(Forwarded Individually Parts) | 4 |
| 01***55 | Screw | 6 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 4 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Front Hanger(#15614-)
| 62***20 | Hanger,Front | 1 |
| 62***20 | Gasket (K1?K2) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Fuel Filter(#15614-24444)
| 01***30 | Screw | 2 |
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 5 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Fuel Filter(#24445-)
| 01***30 | Screw | 2 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 5 |
| 07***14 | Bolt,Joint | 2 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Fuel Injection Pump (Feed Pump) (Inner Parts)(#15882-)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***20 | Pump,Priming | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Inner Parts)(#15882-)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
| DK***20 | Capsule,Spring | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Inner Parts)(#15882-)
| DK***80 | Shim? 0.5mm | 0 |
| DK***00 | Washer,Spring | 1 |
| DK***80 | Bolt,Eye | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#15882-)
| 62***30 | Injection Pump Ass'Y | 1 |
| DK***30 | Key,Woodruff | 1 |
| DK***00 | Camshaft | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#15882-)
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Fuel Injection Pump Drive
| 01***22 | Screw | 4 |
| 01***35 | Grub Screw | 4 |
| 01***12 | Nut | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Fuel Injection Pump Lubricator
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 2 |
| 07***10 | Bolt,Joint | 1 |
| 62***60 | Tube,Oil | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Fuel Injection Pump Mounting(#15882-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***40 | Bolt,(Shim 3-Piece) | 1 |
| 01***08 | Bearing | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Fuel Injection Pump Piping
| 01***25 | Screw | 6 |
| 61***30 | Clip | 1 |
| 62***90 | Cover | 6 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Fuel Return (With Air Compressor)(#22802-)
| 01***65 | Bolt,(For Alternator Bracket Mount) | 1 |
| 01***35 | Screw | 1 |
| 01***14 | Bolt,(With Corrosion Resistor) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Fuel Return(#15614-)
| 01***65 | Bolt,(For Alternator Bracket Mount) | 1 |
| 01***14 | Bolt,(With Corrosion Resistor) | 1 |
| 01***06 | Nut | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Glow Plug (With Lead)
| 60***70 | Glow Plug | 6 |
| 62***10 | Lead,Glow Plug | 5 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Grow Relay(#15614-)
| 01***14 | Bolt - Plate Mounting | 2 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 08***19 | Cap, At Heater Relay Terminals | 2 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Head Cover(#15614-)
| 01***95 | Screw | 1 |
| 01***16 | Washer,(For 35a Alternator) | 1 |
| 07***20 | Clamp, Spring Hose | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Idler Gear
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Injection Nozzle(#15614-)
| 01***40 | Bolt,(Shim 3-Piece) | 6 |
| 07***00 | Clip | 11 |
| 62***10 | Carrier | 6 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Muffler(#15882-)
| 01***65 | Bolt,(For Alternator Bracket Mount) | 1 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***35 | Bolt, Mount Bracket To Floor | 6 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (Arabic)(#19433-21370)
| 04***50 | Screw | 4 |
| 09***62 | Plate? Name | 1 |
| 09***61 | Plate? Instruction,Air Cleaner (Double Element) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (Arabic)(#21371-)
| 04***50 | Screw | 4 |
| 09***62 | Plate? Name | 1 |
| 09***08 | Plate? Instruction,Air Cleaner | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (Chinese)(#19433-21370)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name,(Chinese) (Limited Supply) | 1 |
| 09***61 | Plate? Instruction,(Chinese) (Not Shown) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (Chinese)(#21371-)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name,(Chinese) (Limited Supply) | 1 |
| 09***08 | Plate? Instruction,Air Cleaner | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (English)(#13921-21370)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name,(English) (Limited Supply) | 1 |
| 09***61 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (English)(#21371-)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name,(English) (Limited Supply) | 1 |
| 09***08 | Plate? Instruction,Air Cleaner | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (French-English)(#19433-21370)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name,(French) (Limited Supply) | 1 |
| 09***62 | Plate? Instruction,Air Cleaner (Double Element) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (French-English)(#21371-)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name,(French) (Limited Supply) | 1 |
| 09***08 | Plate? Instruction,Air Cleaner | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (Indonesian-English)(#19433-21370)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name,(Indonesian) (Limited Supply) | 1 |
| 09***61 | Plate? Instruction,(Indonesian-English)(Not Shown | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (Indonesian-English)(#21371-)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name,(Indonesian) (Limited Supply) | 1 |
| 09***08 | Plate? Instruction,(Indonesian) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (Portuguese-English)(#19433-21370)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name | 1 |
| 09***61 | Plate? Instruction,(Portuguese-English)(Not Shown | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (Portuguese-English)(#21371-)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name | 1 |
| 09***08 | Plate? Instruction,(Portuguese) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (Russian)(#19433-21370)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name,(Russian) (Limited Supply) | 1 |
| 09***62 | Plate? Instruction,(English-Russian) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (Russian)(#21371-)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name,(Russian) (Limited Supply) | 1 |
| 09***08 | Plate? Instruction,Air Cleaner | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (Spanish-English)(#19433-21370)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name,(Spanish) (Limited Supply) | 1 |
| 09***61 | Plate? Instruction,(Spanish-English) (Not Shown) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Name Plate And Caution (Spanish-English)(#21371-)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name,(Spanish) (Limited Supply) | 1 |
| 09***08 | Plate? Instruction,Air Cleaner | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Nozzle Holder (Inner Parts)(#15614-)
| 62***00 | Nozzle Holder Ass'Y | 1 |
| DK***00 | Shim? 0.52mm | 0 |
| DK***00 | Shim? 0.54mm | 0 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Oil Cooler(#15882-)
| 01***20 | Screw | 4 |
| 01***25 | Bolt,(With Corrosion Resistor) | 4 |
| 01***30 | Bolt,(Water Separator Spec.) | 16 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Oil Filter(#15614-)
| 01***20 | Bolt,(Forwarded Individually Parts) | 3 |
| 01***30 | Bolt,(Water Separator Spec.) | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Oil Level Gauge And Heater (Cold Terrain Spec.)(#20101-)
| 01***20 | Bolt - Mount Risers To Cab Floor | 1 |
| 08***14 | Band,(For Additional Fuel Strainer) | 1 |
| 08***12 | Clip, Clip,(With Auto Emergency Steering) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Oil Level Gauge(#15614-)
| 62***31 | Gauge,Oil Level | 1 |
| 62***10 | Guide,Oil Gauge | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Oil Pan And Suction Tube (Cold Terrain Spec.)(#20101-)
| 01***12 | Bolt | 3 |
| 01***20 | Screw | 40 |
| 01***50 | Bolt,(With Corrosion Resistor) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Oil Pan And Suction Tube(#15614-)
| 01***10 | Bolt, Mount Flasher | 3 |
| 01***12 | Bolt | 3 |
| 01***20 | Screw | 40 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Oil Pump
| 01***20 | Screw | 1 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 6 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Piston
| 02***13 | Pin,Dowel | 2 |
| 04***18 | Ring,Snap (Itl) | 12 |
| 62***10 | Piston | 6 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Pre-Fuel Filter(#10001-14011)
| 07***12 | Gasket,Mechanical Pump Piping | 2 |
| 60***00 | Fuel Filter Ass'Y | 1 |
| 60***20 | Cartridge,Pref | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Rear Hanger(#15614-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 42***70 | Bracket,(F4320-51a0 -12 ) | 1 |
| 61***20 | Hanger,Rear | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Rocker Arm
| 01***75 | Screw | 8 |
| 61***30 | Circlip | 2 |
| 62***10 | Rocker Socket | 5 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Spare Parts(#19433-)
| 04***64 | V-Belt Set,Fan | 1 |
| 60***92 | Cartridge,(For Slag Handling) | 1 |
| 60***93 | Cartridge, Fuel Filter | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Starting Motor (7.5kw) (Inner Parts)(#15438-27756)
| 60***10 | Starting Motor Ass'Y,(7.5kw) | 1 |
| SD***X0 | Bracket | 1 |
| SD***X0 | Screw | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Starting Motor (7.5kw) (Inner Parts)(#27757-)
| 60***10 | Starting Motor Ass'Y,(7.5kw) | 1 |
| KD***02 | Washer,Spring | 4 |
| KD***40 | Spring,Spring | 4 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Starting Motor Mounting (7.5kw)(#15438-27756)
| 01***40 | Bolt,(With Center Guard) | 3 |
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
| 08***12 | Clip, Clip,(With Auto Emergency Steering) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Starting Motor Mounting (7.5kw)(#27757-)
| 01***40 | Bolt,(With Center Guard) | 3 |
| 01***40 | Bolt (Kit) | 3 |
| 01***16 | Bolt - Starting Motor Ground Cable | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Stop Motor(#15614-24070)
| 01***16 | Bolt, Mounting Transmission Control Switch | 3 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***25 | Bolt,L.H. (For Add. Air Compressor) | 2 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Stop Motor(#24071-)
| 01***16 | Bolt, Mounting Transmission Control Switch | 3 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***25 | Bolt,L.H. (For Add. Air Compressor) | 2 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Turbocharger (Inner Parts)(#15614-)
| 62***80 | Turbocharger Ass'Y,(S2b) | 1 |
| 62***81 | Turbocharger Ass'Y,(S2b) | 1 |
| 62***20 | Turbocharger Ass'Y,(S2b) | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Turbocharger Oil Piping(#15614-)
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 1 |
| 01***16 | Screw | 1 |
| 01***30 | Bolt,(Water Separator Spec.) | 2 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Water Drain Valve
| 07***35 | Tube | 1 |
| 61***12 | Valve,Water Drain | 1 |
| 61***12 | Hose | 1 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Water Pump (With Air Compressor)(#22802-)
| 01***16 | Bolt, Mount Solenoid Valve | 1 |
| 01***45 | Bolt, Bracket Mounting | 1 |
| 01***55 | Bolt, Mount Dryer To Bracket And Frame | 4 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Water Pump(#20118-)
| 01***16 | Bolt, Mount Solenoid Valve | 2 |
| 01***45 | Bolt, Bracket Mounting | 1 |
| 01***55 | Bolt, Mount Dryer To Bracket And Frame | 4 |
Komatsu : S6d108-1f-6(S/N 10001-Up) : Engine : Water Separater(#19433-21061)
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 60***31 | Separator Assembly, Water | 1 |
| 60***60 | Plug,Drain (4d105-5h? 4d105-5t) | 1 |
Frequently asked questions
What type of engine is the Komatsu S6D108-1F-6?
It is a 6-cylinder, inline, water-cooled, turbocharged diesel engine with a displacement of approximately 7.15 liters (7150 cm³). It features direct fuel injection and is designed for heavy-duty construction applications.
What is the operating weight of machines using this engine?
Machines equipped with the S6D108-1F-6 engine, such as the PC300-5/6 and WA380-3 series, typically have operating weights ranging from approximately 20,000 to 35,000 lbs (9,182 to 15,876 kg), depending on the specific configuration, attachments, and counterweight.
What engine replaced the S6D108-1F-6?
The S6D108-1F-6 was succeeded by the SAA6D108E-2 series engine to meet stricter emissions standards. The SAA6D108E-2 features updated electronic control and aftertreatment systems while maintaining the same basic 6-cylinder architecture.
What S6D108-1F-6(S/N 10001-UP) owners discuss
What are the typical powertrain and hydraulic behaviors associated with the Komatsu S6D108-1F-6 engine series?
The S6D108-1F-6 is a 6-cylinder, inline, water-cooled, turbocharged diesel engine. It delivers power in the range of 118–140 kW (160–190 hp) depending on the specific application variant. The engine is designed for high-torque applications in heavy machinery like excavators and wheel loaders. Hydraulic systems in machines equipped with this engine series are known for reliability, but owners report that if the main hydraulic pump fails, the engine often suffers subsequent damage due to the high load placed on it during pump failure events. This correlation contributes to lower resale values for machines where the pump has failed without immediate engine inspection.
What undercarriage and wear patterns are typical for machines using this engine type?
Machines powered by the S6D108 series, such as the PC300-5 and PC300-6 excavators, are subject to significant wear on components like bushings, bearings, and track pads due to continuous load and dust exposure. Worn bushings can lead to increased noise and vibration, while worn bearings may cause premature failure of the tracks. The undercarriage requires regular inspection for track tension and roller condition, as mud or debris packed into the undercarriage can cause uneven travel or pulling to one side. Proper track tension and cleaning are critical to preventing accelerated wear.
What are the known engine quirks or common issues for the S6D108 series?
Common issues include engine overheating during heavy excavation, often caused by material packed between the radiator, hydraulic oil cooler, and charge-air cooler. Owners also report intermittent starting, dashboard failures, or random shutdowns linked to electronic control system faults or unstable power supplies. Fuel system issues, such as air entering the fuel supply or clogged filters, can cause the engine to shake violently or blow white smoke. Additionally, some operators note that the engine may lose power under heavy digging load if air filters are restricted or if the hydraulic system places excessive load on the engine, requiring careful diagnosis to distinguish between engine power loss and hydraulic drag.
What are common electrical or sensor issues reported by owners?
Owners frequently report that a single faulty sensor or unstable power supply can trigger multiple warning signals, leading to intermittent starting or random shutdowns. The oil diversion warning light may stay on for 5–10 minutes, particularly when using non-OEM filters like Donaldson, though this may also be linked to oil changes. Battery voltage should be checked regularly; a healthy battery measures around 12.6 volts when off and maintains 13.7–14.7 volts when the engine runs. Voltage collapse during cranking indicates a weak battery or poor connections, which can mimic engine faults.
What should be checked when buying a used machine with the S6D108-1F-6 engine?
When purchasing a used machine, verify the exact serial number to confirm the engine series and configuration, as specifications vary by configuration and series. Check the engine for signs of overheating, such as coolant leaks or pressurized systems. Inspect the hydraulic system for leaks, stuck components, and adequate fluid levels; note that weak hydraulics when hot may indicate internal pump or valve leakage. Test the engine under load to ensure it does not lose power or RPM excessively. Check the cooling package for debris between heat exchangers. Verify the condition of the undercarriage, including track tension, roller condition, and bushing wear. Ensure the battery and charging system are functioning correctly, as weak batteries can cause starting issues that mimic engine faults.
What are the recommended fluid specifications for the S6D108-1F-6 engine?
Komatsu recommends using Komatsu Genuine fluids for optimal performance. For the engine, use Komatsu EO or equivalent diesel engine oil. For the hydraulic system, use Komatsu TO or HO hydraulic oil. Coolant should be Komatsu Super-coolant AF-NAC or equivalent. Using non-recommended fluids or filters can lead to issues such as premature wear, filter bypass, or warning light activation. Always consult the specific operation and maintenance manual for the machine to confirm the exact fluid specifications and capacities, as they vary by configuration and series.
What safety-critical fixes or inspections are recommended for the S6D108-1F-6 engine?
Regular inspection of the cooling system is critical to prevent overheating. Ensure the radiator, hydraulic oil cooler, and charge-air cooler are clean and free of debris. Check fan operation and coolant level when cold. Inspect the fuel system for air leaks and ensure fuel filters are replaced at recommended intervals. Verify the condition of the turbocharger and intercooler hoses for cracks or leaks. Check engine grounds and battery terminals for corrosion. Have your dealer verify the engine's compression and fuel injection system if power loss or excessive smoke is observed.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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