Komatsuengine(no series)
Komatsu S6D108-1F(S/N 13936-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu S6D108-1F engine (S/N 13936-UP) is a 6-cylinder, 8.3-liter turbocharged diesel powerplant designed for heavy-duty construction applications. It primarily powers the Komatsu WA380-3 wheel loader series and the PC300-5 hydraulic excavator family. The engine delivers approximately 118–140 kW (158–188 HP) of net power. Production for this specific serial range aligns with the mid-1990s to early 2000s era of Komatsu Tier 2/interim Tier 4 equipment. It succeeded earlier 6D102 variants and was eventually replaced by the S6D108-2 series and later SAA6D108E-2 models to meet stricter emissions standards. Configurations offered include standard industrial and generator set applications, with the S6D108-1F specifically noted for loader and excavator duty cycles.
Across the 6D108 series generations, the primary changes involved the transition from mechanical fuel injection to electronic control units (ECU) and the integration of exhaust aftertreatment systems like the KDPF in later models. The S6D108-1F remains critical in the used and parts market because it serves as the heart of the highly durable PC300-5 excavator and WA380-3 loader, machines that dominate secondary markets. Its simple, robust mechanical architecture allows for extensive aftermarket support and cost-effective overhauls compared to newer electronic-heavy engines. The engine's widespread use in these high-volume machines ensures a steady supply of used cores and a mature ecosystem of remanufactured components, making it a staple for fleet managers seeking reliable, serviceable power in older but proven equipment.
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(S/N 13936-UP) specifications
Engine
| Model | S6D108-1F |
| Series/Generation | 6D108 series, Build 7A |
| Configuration | 6-cylinder, 4-stroke, water-cooled, turbocharged diesel |
| Displacement | 8.3 L (506.4 cu in) |
| Power Output | 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 |
| Dig/Dump/Lift/Drawbar | 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(S/N 13936-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(S/N 13936-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu Oil Wear Analysis (KOWA) at every 500-hour interval to monitor engine wear metals (iron, copper, lead) and contaminants. Check coolant SCA concentration at 500 hours to prevent liner cavitation. Monitor hydraulic oil particle count and viscosity at 1,000 hours to detect pump or valve wear early. Track DEF levels daily on Tier 4 variants to ensure SCR system efficiency. Use KOMTRAX telematics to correlate load frequency with fluid degradation rates, adjusting intervals if heavy-duty cycles exceed standard assumptions.
Corrective & Common Repairs
Address S6D108-1F specific issues by inspecting the S2B turbocharger for shaft play and oil leaks at the compressor housing. Check the fuel injection pump for internal wear if black smoke or hard starting occurs. Replace floating seals on the cylinder liners if coolant loss exceeds normal rates. Inspect the oil cooler core for clogging, which causes overheating in WA380-3 loaders. Verify the condition of the exhaust pipe and muffler tube for cracks due to vibration. Replace the camshaft if excessive lobe wear is detected during valve adjustment checks.
Overhaul & Rebuild Points
Plan inframe overhauls for the S6D108-1F (S/N 11731-UP) around 10,000–12,000 hours based on compression loss and oil consumption. Replace piston rings and liners if blow-by exceeds specifications. Inspect the crankshaft journals for scoring during major rebuilds. Check the cylinder head gasket surface for warping if coolant leaks into the oil. Replace the flywheel gear ring if teeth are worn or chipped. Ensure all gasket kits are OEM-spec to maintain compression and prevent external leaks during reassembly.
Seasonal & Environment Servicing
In cold climates, use Komatsu Super Coolant AF-NAC and ensure the engine block heater is functional to prevent gel in the fuel system. Drain the fuel water separator daily to prevent ice formation. In dusty environments, check the air filter restriction indicator more frequently and clean the outer element at 250-hour intervals. In high-humidity areas, inspect the radiator and oil cooler fins for biological growth and clean with low-pressure air. Verify battery hold-down and terminal integrity to prevent vibration damage in rough terrain operations.
S6D108-1F(S/N 13936-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 → |
| 600-311-9101 | 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 → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
S6D108-1F(S/N 13936-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft 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 or corrosion. Test sensor voltage output. Replace the speed sensor if the signal is absent or erratic. |
| CA111 | Internal engine controller (ECM) fault | Critical internal failure of the Electronic Control Module or loss of power supply to the ECM. | Check ECM power connections, fuses, and ground wires. If power is stable, the ECM may require replacement or reprogramming. |
| CA451 | Common rail pressure sensor feedback value too high | Faulty rail pressure sensor, actual overpressure condition, or short in the sensor wiring. | Verify rail pressure with a mechanical gauge. Inspect the sensor and its wiring harness for shorts or damage. Replace the sensor if the electrical signal is incorrect. |
| CA441 | Battery voltage too low | Weak or discharged battery, faulty alternator, or loose battery cables. | Check battery charge state and terminal connections. Test alternator output voltage. Replace the battery or alternator as needed. |
| CA122 | Intake air pressure sensor feedback voltage too high | Faulty intake pressure sensor, shorted wiring, or actual high boost pressure. | Inspect the intake air pressure sensor and its wiring harness. Check for air filter blockage or turbocharger issues causing excessive boost. |
| CA123 | Intake air pressure sensor feedback voltage too low | Faulty intake pressure sensor, open circuit in wiring, or significant air leak/restriction. | Check the sensor connector for corrosion or loose pins. Inspect the intake piping for leaks. Test the sensor signal voltage. |
| CA153 | Intake air temperature sensor feedback voltage too high | Faulty intake air temperature (IAT) sensor or open circuit in the sensor wiring. | Inspect the IAT sensor and its wiring harness. Replace the sensor if the resistance/voltage values are out of specification. |
| CA234 | Engine overspeed | Throttle calibration error, operator misuse, or fuel control system malfunction. | Verify throttle calibration and engine load cycle. Check the fuel control solenoid and governor mechanism for proper operation. |
| AA10NX | Air cleaner clogging | Clogged air filter element or restricted intake path. | Inspect the air filter indicator. Replace the air filter element if clogged. Check the intake ducting for obstructions. |
| B@BCNS | Engine coolant overheating | Low coolant level, failed thermostat, clogged radiator, or broken fan belt. | Check coolant level and inspect for leaks. Verify radiator fan operation and belt tension. Clean radiator fins if blocked. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
S6D108-1F(S/N 13936-UP) attachments & work tools
Wheel Loader Attachments
The Komatsu WA380-3 wheel loader (serial 53001-Up) utilizes the S6D108-1F engine (serial 13936-Up). Factory configurations include standard bucket mounting systems compatible with the WA380-3 frame. Typical work tools for this class include general-purpose buckets and light material buckets, with capacities varying by configuration/series based on the machine's rated payload.
Excavator Attachments
The Komatsu PC300-5 hydraulic excavator is powered by the S6D108 engine family. Standard attachment interfaces support digging buckets and trenching buckets sized for the 30-ton class. Hydraulic circuit arrangements for quick couplers or auxiliary lines must match the specific excavator model's factory hydraulic kit, as tool compatibility varies by configuration/series.
Generator Set Options
The S6D108-1F engine is specified for the Komatsu EGS160 generator set. Factory configurations include standard electrical output panels and sound-attenuated enclosures. Options for this industrial application focus on voltage regulation and frequency stability rather than mechanical work tools.
Dozer Attachments
The Komatsu D57S-1B dozer (serial 20001-Up) uses the S6D108-1B engine (serial 11731-Up). Standard work tools include straight blades and angle blades mounted to the dozer frame. Guarding options and blade configurations vary by configuration/series depending on the specific job site requirements.
All S6D108-1F(S/N 13936-UP) assemblies by section
Every catalogued assembly group for the Komatsu S6D108-1F(S/N 13936-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Engine
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Air Cleaner (With Air Compressor)
| 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(S/N 13936-Up) : Engine : Air Cleaner (With Intake Extension Pipe)
| 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(S/N 13936-Up) : Engine : Air Cleaner (With Intake Extension Pipe) (With Air Compressor)
| 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(S/N 13936-Up) : Engine : Air Cleaner(#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(S/N 13936-Up) : Engine : Air Cleaner(#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(S/N 13936-Up) : Engine : Air Compressor (Inner Parts)
| 62***11 | Air Compressor Ass'Y | 1 |
| DK***00 | Guide,Spring | 1 |
| DK***00 | Connecting Rod A | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Air Compressor Mounting
| 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(S/N 13936-Up) : Engine : Air Compressor Piping (Air)
| 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(S/N 13936-Up) : Engine : Air Compressor Piping (Water)
| 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(S/N 13936-Up) : Engine : Air Intake Manifold
| 01***35 | Bolt, Cover | 3 |
| 01***50 | Screw | 24 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 3 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Alternator (35a) (Inner Parts)
| 60***20 | Alternator A. (35a),(With Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Alternator (50a) (Inner Parts)
| 60***60 | Alternator A. (50a),(With Hardening Pulley) | 1 |
| SD***X0 | Coil Assembly | 1 |
| SD***X0 | Washer | 1 |
Komatsu : S6d108-1f(S/N 13936-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(S/N 13936-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(S/N 13936-Up) : Engine : Alternator Mounting (35a)
| 01***70 | Bolt,(With Wear Guard) | 1 |
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***60 | Bolt, Mounting | 2 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Alternator Mounting (35a) (Inner Parts)
| 60***20 | Alternator A. (35a),(With Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Alternator Mounting (35a) (With Air Compressor)
| 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(S/N 13936-Up) : Engine : Alternator Mounting (50a) (With Air Compressor)
| 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(S/N 13936-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(S/N 13936-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(S/N 13936-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(S/N 13936-Up) : Engine : Cooling Fan
| 01***10 | Screw | 6 |
| 60***00 | Fan,Cooling | 1 |
| 62***10 | Adaptor | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Corrosion Resistor
| 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(S/N 13936-Up) : Engine : Crank Pulley
| 01***45 | Bolt,Nylock | 1 |
| 61***20 | Collar,Taper | 1 |
| 61***31 | Plate | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Crankshaft(#13936-15613)
| 61***40 | Fitting Wedge | 1 |
| 62***10 | Crankshaft Bearing | 7 |
| 62***50 | Thrust Metal Ass'Y | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Crankshaft(#15614-)
| 61***40 | Fitting Wedge | 1 |
| 62***10 | Crankshaft Bearing | 7 |
| 62***50 | Thrust Metal Ass'Y | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Cylinder Block
| 01***20 | Screw | 2 |
| 04***14 | Pin, Dowel | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Cylinder Block (A)
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Cylinder Block (With Air Compressor)
| 01***20 | Screw | 2 |
| 04***14 | Pin, Dowel | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Cylinder Block Gasket Kit
| 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(S/N 13936-Up) : Engine : Cylinder Block Heater (A)
| 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(S/N 13936-Up) : Engine : Cylinder Block Plate (Without Block Heater)
| 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(S/N 13936-Up) : Engine : Cylinder Head
| 07***08 | Plug,(Without Lock-Up), Plug | 7 |
| 07***10 | Plug, Expansion | 9 |
| 07***16 | Plug | 17 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Cylinder Head Gasket Kit
| 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(S/N 13936-Up) : Engine : Damper
| 01***45 | Bolt, Bracket Mounting | 6 |
| 62***10 | Pulley?Non Hardening,(For Air Conditioner) | 1 |
| 62***20 | Damper Ass'Y | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Engine Mounting (For Mechanical Governor)
| 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(S/N 13936-Up) : Engine : Engine Mounting (For Mechanical Governor) (With Air Compressor)
| 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(S/N 13936-Up) : Engine : Exhaust Manifold (With Air Compressor)
| 01***25 | Grub Screw | 4 |
| 01***60 | Bolt - Upper Cooler Inlet Tubemounting | 2 |
| 01***80 | Bolt (M10-1.50x80) | 9 |
Komatsu : S6d108-1f(S/N 13936-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(S/N 13936-Up) : Engine : Flywheel
| 01***35 | Screw | 8 |
| 61***61 | Washer, Plain (14mm) | 8 |
| 62***90 | Ring Gear | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Flywheel Housing
| 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(S/N 13936-Up) : Engine : Flywheel Housing (With Revolution Sensor)
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Front Cover (With Air Compressor) (Gear Box 7/8-18ns)
| 01***20 | Bolt,(Forwarded Individually Parts) | 4 |
| 01***55 | Screw | 6 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 8 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Front Cover (With Air Compressor) (Gear Box M22x1.5)
| 01***20 | Bolt,(Forwarded Individually Parts) | 4 |
| 01***55 | Screw | 6 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 8 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Front Cover (With Tachometer Outlet) (Gear Box 22x1.5)
| 01***20 | Bolt,(Forwarded Individually Parts) | 4 |
| 01***55 | Screw | 6 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 4 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Front Cover (With Tachometer Outlet) (Gear Box 7/8-18ns)
| 01***20 | Bolt,(Forwarded Individually Parts) | 4 |
| 01***55 | Screw | 6 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 4 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Front Hanger
| 62***20 | Hanger,Front | 1 |
| 62***20 | Gasket (K1?K2) | 1 |
Komatsu : S6d108-1f(S/N 13936-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(S/N 13936-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(S/N 13936-Up) : Engine : Fuel Injection Pump (Feed Pump) (Inner Parts)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***20 | Pump,Priming | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Inner Parts)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
| DK***20 | Capsule,Spring | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Inner Parts)
| DK***80 | Shim? 0.5mm | 0 |
| DK***00 | Washer,Spring | 1 |
| DK***80 | Bolt,Eye | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)
| 62***30 | Injection Pump Ass'Y | 1 |
| DK***30 | Key,Woodruff | 1 |
| DK***00 | Camshaft | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Inner Parts)
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Fuel Injection Pump Drive
| 01***22 | Screw | 4 |
| 01***35 | Grub Screw | 4 |
| 01***12 | Nut | 1 |
Komatsu : S6d108-1f(S/N 13936-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(S/N 13936-Up) : Engine : Fuel Injection Pump Mounting
| 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(S/N 13936-Up) : Engine : Fuel Injection Pump Piping
| 01***25 | Screw | 6 |
| 61***30 | Clip | 1 |
| 62***30 | Clip? With Thread | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Fuel Return
| 01***65 | Bolt,(For Alternator Bracket Mount) | 1 |
| 01***14 | Bolt,(With Corrosion Resistor) | 1 |
| 01***06 | Nut | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Fuel Return (With Air Compressor)
| 01***65 | Bolt,(For Alternator Bracket Mount) | 1 |
| 01***35 | Screw | 1 |
| 01***14 | Bolt,(With Corrosion Resistor) | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Glow Plug
| 60***70 | Glow Plug | 6 |
| 62***10 | Lead,Glow Plug | 5 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Grow Reray
| 01***14 | Bolt - Plate Mounting | 2 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 08***19 | Cap, At Heater Relay Terminals | 2 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Head Cover
| 01***95 | Screw | 1 |
| 01***16 | Washer,(For 35a Alternator) | 1 |
| 07***20 | Clamp, Spring Hose | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Idler Gear
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Injection Nozzle
| 01***40 | Bolt,(Shim 3-Piece) | 6 |
| 07***00 | Clip | 11 |
| 62***10 | Carrier | 6 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Muffler
| 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(S/N 13936-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(S/N 13936-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(S/N 13936-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(S/N 13936-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(S/N 13936-Up) : Engine : Name Plate And Caution (English)(#19433-21370)
| 04***50 | Screw | 4 |
| 09***25 | Plate? Name,(English) (Limited Supply) | 1 |
| 09***61 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
Komatsu : S6d108-1f(S/N 13936-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(S/N 13936-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(S/N 13936-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(S/N 13936-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(S/N 13936-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(S/N 13936-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(S/N 13936-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(S/N 13936-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(S/N 13936-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(S/N 13936-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(S/N 13936-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(S/N 13936-Up) : Engine : Nozzle Holder (Inner Parts)
| 62***00 | Nozzle Holder Ass'Y | 1 |
| DK***00 | Shim? 0.52mm | 0 |
| DK***00 | Shim? 0.54mm | 0 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Oil Cooler
| 01***20 | Screw | 4 |
| 01***25 | Bolt,(With Corrosion Resistor) | 4 |
| 01***30 | Bolt,(Water Separator Spec.) | 16 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Oil Filter
| 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(S/N 13936-Up) : Engine : Oil Level Gauge
| 62***31 | Gauge,Oil Level | 1 |
| 62***10 | Guide,Oil Gauge | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Oil Level Gauge And Heater (A)
| 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(S/N 13936-Up) : Engine : Oil Pan And Suction Tube
| 01***10 | Bolt, Mount Flasher | 3 |
| 01***12 | Bolt | 3 |
| 01***20 | Screw | 40 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Oil Pan And Suction Tube (A)
| 01***12 | Bolt | 3 |
| 01***20 | Screw | 40 |
| 01***50 | Bolt,(With Corrosion Resistor) | 1 |
Komatsu : S6d108-1f(S/N 13936-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(S/N 13936-Up) : Engine : Piston
| 02***13 | Pin,Dowel | 2 |
| 04***18 | Ring,Snap (Itl) | 12 |
| 62***10 | Piston | 6 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Pre-Fuel Filter(#19433-21236)
| 07***12 | Gasket,Mechanical Pump Piping | 2 |
| 60***00 | Fuel Filter Ass'Y | 1 |
| 60***01 | Fuel Filter Ass'Y | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Rear Hanger
| 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(S/N 13936-Up) : Engine : Rocker Arm
| 01***75 | Screw | 8 |
| 61***30 | Circlip | 2 |
| 62***10 | Rocker Socket | 5 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Spare Parts
| 04***64 | V-Belt Set,Fan | 1 |
| 60***92 | Cartridge,(For Slag Handling) | 1 |
| 60***93 | Cartridge, Fuel Filter | 1 |
Komatsu : S6d108-1f(S/N 13936-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(S/N 13936-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(S/N 13936-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(S/N 13936-Up) : Engine : Starting Motor Mounting (7.5kw)(#27757-)
| 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(S/N 13936-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(S/N 13936-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(S/N 13936-Up) : Engine : Turbocharger (Inner Parts)
| 62***80 | Turbocharger Ass'Y,(S2b) | 1 |
| 62***81 | Turbocharger Ass'Y,(S2b) | 1 |
| 62***20 | Turbocharger Ass'Y,(S2b) | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Turbocharger Oil Piping
| 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(S/N 13936-Up) : Engine : Water Drain Valve
| 07***35 | Tube | 1 |
| 61***12 | Valve,Water Drain | 1 |
| 61***12 | Hose | 1 |
Komatsu : S6d108-1f(S/N 13936-Up) : Engine : Water Pump
| 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(S/N 13936-Up) : Engine : Water Pump (With Air Compressor)
| 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(S/N 13936-Up) : Engine : Water Separater(#19433-21236)
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 60***31 | Separator Assembly, Water | 1 |
| 60***60 | Plug,Drain (4d105-5h? 4d105-5t) | 1 |
S6D108-1F(S/N 13936-UP) serial number reference
The engine serial plate is riveted to the left side of the engine block, typically near the injection pump or valve cover. The prefix is the model code (e.g., WA380-3) stamped on the machine's chassis or data plate, while the engine model (S6D108-1F) is on the engine plate.
| Prefix | Identifies | Notes |
|---|---|---|
| WA380-3 | Wheel Loader | S/N 53001-Up. Engine: S6D108-1F. Source: Equipment Guide PDF. |
| WA380-3 Avance Plus | Wheel Loader | S/N A51001-Up. Engine: SA6D114E-1. Source: Equipment Guide PDF. |
| WA380-3H | Wheel Loader | S/N 20051-20500. Engine: S6D108-1. Source: Equipment Guide PDF. |
Frequently asked questions
What engine does the Komatsu S6D108-1F(S/N 13936-UP) use?
It uses the Komatsu S6D108-1F, a 6-cylinder, 8.3-liter, water-cooled, turbocharged diesel engine. This specific serial range (13936-UP) is typically found in Komatsu WA380-3 wheel loaders and PC300-5 excavators.
What is the operating weight of the machine powered by this engine?
The operating weight varies by configuration. For the Komatsu WA380-3 wheel loader, it is approximately 34,000–35,000 lb (15,422–15,876 kg). For the PC300-5 excavator, it ranges from roughly 67,120 to 107,497 lb (30,445–48,760 kg) depending on the boom, stick, and counterweight setup.
What replaced the Komatsu S6D108-1F engine?
The S6D108-1F was succeeded by the S6D108-2 series and the SAA6D108E-2 series engines. These later models incorporated electronic fuel injection and emissions control technologies to meet Tier 4 Interim and Stage IIIA/B regulations, replacing the mechanical injection system of the S6D108-1F.
What S6D108-1F(S/N 13936-UP) owners discuss
What are the known powertrain and hydraulic behaviors for the Komatsu S6D108-1F engine series?
The S6D108-1F is a 6-cylinder, 8.3-liter turbocharged diesel engine delivering 158–188 hp (118–140 kW). It is primarily used in the Komatsu PC300-5 series excavators and WA380-3 wheel loaders. The powertrain is characterized by smooth operation and high fuel efficiency. A known hydraulic behavior in this series is that if the main hydraulic pump fails, the engine is often not far behind due to contamination or shared wear patterns. Dash 6 machines in this era are noted for specific valve problems, particularly on PC150 and PC120 models, though the PC300-5 shares similar hydraulic architecture.
What undercarriage or wear patterns are typical for machines equipped with this engine?
Machines with this engine, such as the PC300-5, are subject to significant wear on bushings, bearings, and track pads due to heavy-duty construction and mining applications. Worn bushings lead to noise and vibration, while worn bearings can cause premature track failure. The line is generally designed to wear out complete machines simultaneously; therefore, undercarriage wear often coincides with major powertrain or hydraulic component failure. Track tension and roller condition should be monitored closely, as mud or debris packed into the undercarriage can exacerbate wear.
What are the common engine quirks per the S6D108-1F series?
The S6D108-1F is robust but sensitive to contamination, extended service intervals, and low-quality fuel, which accelerate wear. Common quirks include overheating during heavy excavation if the cooling package (radiator, hydraulic oil cooler, charge-air cooler) is clogged with fine debris. The engine may lose power under load if air or fuel filters are restricted, or if the fuel tank venting is blocked. Intermittent starting or random shutdowns can occur due to unstable power supplies or faulty sensors rather than mechanical engine failure.
What are the common electrical or sensor issues associated with this engine?
Komatsu excavators with this engine rely heavily on electronic control systems. Common issues include intermittent starting, dashboard failures, and random shutdowns triggered by a single faulty sensor or unstable power supply. Specific error codes to watch for include CA131/CA132 (Throttle Sensor High/Low Error), CA144/CA145 (Coolant Temp Sensor High/Low Error), and CA441/CA442 (Battery Voltage Low/High Error). The ECM may also report crankcase pressure high errors (CA555/CA556) or rail pressure errors (CA553/CA559) if fuel delivery or turbocharging is compromised.
What should be checked when buying a used machine with the S6D108-1F engine (S/N 13936-UP)?
When inspecting a used machine with this engine, check for signs of hydraulic contamination by inspecting the engine oil for fuel dilution or coolant presence. Verify the condition of the turbocharger (S2B type) and intercooler hoses for cracks or leaks. Test the engine under load to ensure it maintains RPM without excessive black smoke or derating. Check for error codes related to the fuel feed pump (CA2265/CA2266) and rail pressure sensors. Inspect the undercarriage for worn track pads and rollers, and verify that the hydraulic functions are strong when hot to rule out internal pump or valve leakage.
What are the critical safety considerations for the S6D108-1F engine cooling and fuel systems?
The engine operates at high pressures and temperatures. The cooling system must be maintained to prevent overheating, which can lead to catastrophic engine failure. The fuel system operates at very high rail pressures; any leaks or sensor failures can cause performance issues or safety hazards. Always verify the integrity of the fuel lines and sensors. Have your dealer verify the condition of the turbocharger and intercooler system, as failure can lead to engine overspeed or severe damage.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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