Komatsu S6D105-1WW(S/N 63244-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu S6D105-1WW engine is a six-cylinder, turbocharged diesel powerplant belonging to the 6D105 series, specifically designated for serial numbers 63244 and up. It powers mid-size to heavy construction machinery, including the WA300-1 wheel loader and PC200-3/PC220-3 excavators. Production years span the late 1990s through the 2000s, bridging the transition from mechanical to electronic control systems in Komatsu's lineup. This engine replaced earlier mechanical variants in the 6D105 family and was succeeded by electronically controlled iterations in the SAA6D107 and SAA6D114 series as emissions regulations tightened. Configurations offered include mechanical fuel injection for the WW suffix, supporting a weight range of approximately 20,000 to 50,000 lb for the host machines.
Across the 6D105 series generations, the primary change was the shift from purely mechanical fuel delivery to integrated electronic management, improving fuel efficiency and reducing emissions without sacrificing the rugged simplicity Komatsu is known for. The S6D105-1WW remains critical in the used and parts market because it serves as the heart of the highly durable PC200 and WA300 platforms, which have massive global installed bases. Its mechanical fuel system allows for easier field repairs in remote locations compared to modern common-rail engines, while its widespread use ensures a robust aftermarket supply of cylinder kits, pistons, and gaskets. The engine's longevity and the availability of remanufactured components keep it a cost-effective choice for fleet managers maintaining older but reliable 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 S6D105-1WW(S/N 63244-UP) specifications
Engine
| Model | S6D105-1WW |
| Series | S6D105-1 |
| Displacement | 6.5 L (396 cu. in.) |
| Cylinders | 6 |
| Aspiration | Turbocharged |
| Fuel System | Direct injection |
| Gross Power | 170 hp |
| Torque | 550 lb-ft |
| 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 Depth | Not documented for this exact serial range — verify with your dealer |
| Bucket Capacity | Not documented for this exact serial range — verify with your dealer |
Service capacities (summary)
| Engine Oil Refill Capacity | Varies by engine model (4095L-1, 6096L-1 referenced in service procedures) |
| Cooling System Capacity | Not documented for this exact serial range — verify with your dealer |
| Fuel Tank Capacity | Not documented for this exact serial range — verify with your dealer |
| Hydraulic System Capacity | 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 S6D105-1WW(S/N 63244-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 S6D105-1WW(S/N 63244-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu Oil Wear Analysis (KOWA) at every 500-hour interval to monitor engine oil wear metals (iron, copper, lead) and contaminants. Check hydraulic fluid particle count and viscosity to detect pump wear early. Monitor coolant pH and SCA concentration to prevent liner cavitation in the S6D105-1WW block. Track KOMTRAX telematics data for fuel consumption spikes or abnormal load frequencies that indicate injector or turbo inefficiency. Early detection of silicon (dirt) or sodium (coolant) in oil prevents catastrophic engine failure.
Corrective & Common Repairs
Address intermittent starting or random shutdowns by inspecting the engine controller power supply and sensor wiring, common in S6D105-1WW units. Replace worn piston rings and cylinder liners if blue smoke or excessive oil consumption occurs. Fix hydraulic leaks by replacing worn seals on the main pump and swing motor, frequent failure points in PC200-3 excavators. Clean or replace the turbocharger if black smoke or loss of power is observed. Ensure the mechanical fuel injection system is properly calibrated to maintain torque output of 550 lb-ft.
Overhaul & Rebuild Points
Plan inframe overhaul when compression drops below specification or oil pressure falls despite fresh filters. Replace piston rings, cylinder liners, and bearings using the Komatsu S6D105-1 Series Inframe-Overhaul Rebuild Kit. Inspect the crankshaft for wear and the cylinder head for valve seat integrity. Rebuild the turbocharger if shaft play exceeds limits. Replace the water pump and thermostat during coolant flushes to prevent overheating. Verify all gaskets and seals are OEM-spec to maintain compression and prevent coolant leaks.
Seasonal & Environment Servicing
In cold climates, use low-viscosity Komatsu diesel engine oil and ensure the cooling system contains the correct glycol mix to prevent freezing. In dusty environments, check the air filter restriction indicator more frequently and clean the radiator and oil cooler fins daily to prevent overheating. In high-humidity areas, drain the fuel water separator daily to prevent microbial growth and injector corrosion. Inspect rubber hoses and belts for UV degradation in sunny regions. Adjust track tension on excavators to account for mud or snow accumulation.
S6D105-1WW(S/N 63244-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 → |
| 600-311-8221 | Cartridge,Engine Fuel Filter | Fuel system service | Check fitment → |
| 6136-71-6120 | Cartridge,Engine Fuel Filter | Fuel system service | Check fitment → |
| 6136-72-6100 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
S6D105-1WW(S/N 63244-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 |
| 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 |
| CA122 | Intake air pressure sensor feedback voltage too high | Sensor malfunction or wiring issue | Verify the intake pressure sensor and wiring |
| CA123 | Intake air pressure sensor feedback voltage too low | Sensor short or airflow restriction | Check for a sensor short or an airflow restriction |
| CA441 | Battery voltage too low | Alternator or battery failure; voltage regulator issue | Replace the alternator or battery; check the voltage regulator |
| CA442 | Battery voltage too high | Alternator or battery failure; voltage regulator issue | Replace the alternator or battery; check the voltage regulator |
| CA234 | Engine overspeed | Throttle calibration error, engine load cycle issue, or operator misuse | Verify throttle calibration, engine load cycle, or operator misuse |
| CA153 | Intake air temperature sensor feedback voltage too high | Sensor malfunction | Replace or test the IAT sensor |
| CA154 | Intake air temperature sensor feedback voltage too low | Sensor malfunction | Replace or test the IAT sensor |
| CA2311 | IMV solenoid valve failure | Solenoid failure or wire harness issue | Replace the IMV solenoid or inspect the wire harness |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
S6D105-1WW(S/N 63244-UP) attachments & work tools
Excavator Attachments
The S6D105-1WW engine powers the PC200-3 and PC200LC-3 crawler excavator series. Standard work tools include digging buckets ranging from 0.8 to 1.2 cubic meters and grading blades. Hydraulic breaker and hammer configurations require specific pilot control kits and high-flow hydraulic lines to match the engine's output.
Wheel Loader Attachments
This engine is installed in the WA300-1 and WA300-1A wheel loaders. Typical work tools include general-purpose buckets with capacities between 2.0 and 3.0 cubic meters. Multi-purpose and rock buckets are available, along with pallet forks and grapples for material handling applications.
Motor Grader Attachments
The S6D105-1WW drives the GD500R-2, GD505A-2, and GD505R-2 motor graders. Primary work tools consist of straight blades and moldboard plows. Auxiliary options include side shift mechanisms and angle blades for specialized grading and ditching tasks.
Dozer Attachments
The engine is used in the D20, D21, D31, D40, D41, and D45 crawler dozer series. Standard implements include straight blades and angle blades. Ripper attachments are available for rock and hard soil applications, requiring reinforced mounting brackets and hydraulic connections.
Generator Set Options
The S6D105-1WW is configured for industrial generator sets, including the EG100-2, EG100S-2, and EG125-1 models. These configurations utilize specific mounting frames, vibration dampers, and exhaust systems to meet industrial power generation standards.
All S6D105-1WW(S/N 63244-UP) assemblies by section
Every catalogued assembly group for the Komatsu S6D105-1WW(S/N 63244-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Accessory
Komatsu : S6d105-1ww(S/N 63244-Up) : Accessory : Air Compressor (Except Japan)
Komatsu : S6d105-1ww(S/N 63244-Up) : Accessory : Air Compressor Piping (Except Japan)
| 07***16 | Gasket,Air Compressor Piping | 1 |
| 07***89 | Clamp,(For Japan) | 2 |
| 61***30 | Elbow,(For Pc200) | 1 |
Cooling System
Komatsu : S6d105-1ww(S/N 63244-Up) : Cooling System : Corrosion Resistor And Piping
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***29 | Washer,Spring (Cold Weather Spec.) | 4 |
| 01***30 | Washer, Spring (Supplied W/Spider Assembly), Washer-Spring | 4 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cooling System : Water Pump And Cooling Fan
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
| 01***55 | Bolt,(For Suction? Reversible Fan) | 2 |
Cylinder Block
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Block : Camshaft And Tappet
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
| 01***16 | Washer,(For Shipping) | 2 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Block : Crankshaft
| 01***25 | Bolt - Rear Guard Mounting | 6 |
| 01***45 | Bolt,Nylock | 1 |
| 01***36 | Washer,Radio Controlled Slag Handling | 6 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Block : Crankshaft (Wiht Air Conditioner)
| 01***70 | Bolt, Heater Hose Clip | 6 |
| 01***45 | Bolt,Nylock | 1 |
| 01***50 | Bolt | 6 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Block : Cylinder Block
| 01***30 | Bolt,(For France Noise Suppression) | 3 |
| 01***45 | Bolt,(For Suction? Reversible Fan) | 1 |
| 01***20 | Bolt,(Used When Towing Winch) | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Block : Flywheel And Flywheel Housing (Key Stop Type)
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 2 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 9 |
| 01***45 | Bolt,(Cold Terrain Spec.) | 2 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Block : Front Cover And Gear
| 01***22 | Bolt,(Cold Terrain Spec.) | 4 |
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
| 01***60 | Bolt,(Without Alternator Bracket) | 10 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Block : Oil Pan
| 01***22 | Bolt,(Cold Terrain Spec.) | 29 |
| 01***25 | Bolt,(Without Auto Priming System) | 8 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Block : Oil Pan (Cold Terrain Spec.)
| 01***22 | Bolt,(Cold Terrain Spec.) | 29 |
| 01***25 | Bolt,(Without Auto Priming System) | 8 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Block : Piston And Connecting Rod
| 04***18 | Ring, Retaining | 2 |
| 61***40 | Crank Pin Metal A | 6 |
| 61***00 | Connecting Rod Ass'Y,(B) | 6 |
Cylinder Head
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Head : Air Cleaner And Mounting
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***25 | Bolt (M10x1.50x25) | 2 |
| 01***08 | Nut,R.H. Thread | 6 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Head : Air Intake Manifold And Connection
| 01***16 | Bolt (Welded) | 2 |
| 01***20 | Bolt | 2 |
| 01***50 | Bolt,(For Trimming Dozer) | 2 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Head : Cylinder Head
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
| 01***16 | Washer,Radio Controlled Slag Handling | 2 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Head : Cylinder Head Cover(#78030-)
| 07***23 | Clamp - Hose | 1 |
| 07***00 | Clip | 1 |
| 07***30 | Clip | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Head : Exhaust Manifold And Turbocharger
| 01***60 | Bolt (M10-1.50x60) | 1 |
| 01***00 | Bolt (M10-1.50x100) | 11 |
| 01***15 | Bolt | 2 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Head : Muffler And Mounting
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 4 |
| 01***45 | Bolt,(For Suction? Reversible Fan) | 4 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Head : Rocker Arm
| 01***80 | Bolt,(Shim 5 Pieces Over) | 2 |
| 01***06 | Nut, Regular Hexagon (M8-1.25) | 12 |
| 01***36 | Washer,Radio Controlled Slag Handling | 6 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Cylinder Head : Turbocharger (Except Japan)
| 61***00 | Turbocharger Ass'Y,(T04b-59) | 1 |
| GA***00 | Clamp | 3 |
| GA***01 | Bolt | 6 |
Electrical System
Komatsu : S6d105-1ww(S/N 63244-Up) : Electrical System : Alternator (25a)
| 60***20 | Alternator A. (25a),(With Non Hardening Pulley) | 1 |
| 60***30 | Alternator A. (25a),(With Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Electrical System : Alternator (35a) (With Hardening Pulley)
| 60***20 | Alternator A. (35a),(With Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Electrical System : Alternator (35a) (With Non Hardening Pulley)
| 60***80 | Alternator A. (35a),(With Non Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Electrical System : Alternator (50a) (With Hardening Pulley)
| 60***90 | Alternator A. (50a),(With Hardening Pulley) | 1 |
| SD***X0 | Washer | 1 |
| SD***X0 | Fan | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Electrical System : Alternator (50a) (With Non Hardening Pulley)
| 60***90 | Alternator A. (50a),(With Non Hardening Pulley) | 1 |
| SD***X0 | Washer | 1 |
| SD***X0 | Fan | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Electrical System : Alternator (75a) (With Non Hardening Pulley)
| 60***40 | Alternator A. (75a),(With Non Hardening Pulley) | 1 |
| SD***X0 | Coil Assembly | 1 |
| SD***X0 | Bracket, Rear | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Electrical System : Alternator And Mounting (25a? 35a) (Bracket Less Type)
| 01***45 | Bolt,(For Suction? Reversible Fan) | 1 |
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
| 01***10 | Nut,(Dust?Drip Proof? Trimming S.) | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Electrical System : Alternator And Mounting (50a? 75a) (Bracket Mounting Type)
| 01***40 | Bolt,(Dust And Dirt Protection) | 1 |
| 01***70 | Bolt,(With Wear Guard) | 1 |
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Electrical System : Heater Switch And Heater Signal
| 60***70 | Switch,Air Intake Heater | 1 |
| 60***71 | Signal,Signal | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Electrical System : Starting Motor (5.5kw)
| 60***90 | Starting Motor Ass'Y,(5.5kw) | 1 |
| KD***30 | Bracket,Center | 1 |
| KD***50 | Clutch Ass'Y,Over Running | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Electrical System : Starting Motor (7.5kw)
| 60***50 | Starting Motor Ass'Y,(7.5kw) | 1 |
| KD***60 | Shift Lever Assembly | 1 |
| KD***40 | Spring,Spring | 4 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Electrical System : Starting Motor (7.5kw)(#.-)
| 60***50 | Starting Motor Ass'Y,(7.5kw) | 1 |
| KD***60 | Shift Lever Assembly | 1 |
| KD***40 | Spring,Spring | 4 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Electrical System : Starting Motor And Mounting (5.5kw? 7.5kw)
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 3 |
| 01***36 | Washer,Radio Controlled Slag Handling | 3 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
Engine Kit
Komatsu : S6d105-1ww(S/N 63244-Up) : Engine Kit : Gasket Kit
| 07***18 | O-Ring,(See Fig.1601-29?1602-17) | 1 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
Fuel System
Komatsu : S6d105-1ww(S/N 63244-Up) : Fuel System : Additional Fuel Filter
| 07***12 | Gasket,Mechanical Pump Piping | 2 |
| 60***00 | Fuel Filter Ass'Y | 1 |
| 60***20 | Cartridge,Pref | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Fuel System : Fuel Filter And Piping
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
| 01***16 | Washer,Radio Controlled Slag Handling | 2 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Fuel System : Fuel Injection Pump (Coupling)
| DK***00 | Bolt | 1 |
| DK***00 | Washer,Lock | 2 |
| DK***00 | Coupling,Cross | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Fuel System : Fuel Injection Pump (Feed Pump)
| DK***20 | Bolt, Joint | 1 |
| DK***20 | Pump,Priming | 1 |
| DK***20 | Housing | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#84313-86476)
| DK***20 | Guide Lever Ass'Y | 1 |
| DK***00 | Adapter | 1 |
| DK***00 | Spring | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#86477-)
| DK***30 | Governor Ass'Y | 1 |
| DK***20 | Guide Lever Ass'Y | 1 |
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#84313-86476)
| DK***00 | Spring,Governor | 1 |
| DK***80 | Shim? 0.5mm | 0 |
| DK***00 | Washer,Spring | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#86477-)
| DK***00 | Spring,Governor | 1 |
| DK***80 | Shim? 0.5mm | 0 |
| DK***00 | Washer,Spring | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Fuel System : Fuel Injection Pump (Pump)
| 61***11 | Injection Pump Ass'Y | 1 |
| 61***90 | Injection Pump Ass'Y | 1 |
| DK***10 | Washer,Spring | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Fuel System : Fuel Injection Pump And Piping
Komatsu : S6d105-1ww(S/N 63244-Up) : Fuel System : Fuel Injection Pump And Piping (With Air Compressor) (Except Japan)
| 01***70 | Bolt | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Fuel System : Fuel Nozzle And Spill Pipe
| 01***55 | Bolt,(For Trimming Dozer) | 12 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 12 |
| 07***12 | Gasket,Mechanical Pump Piping | 2 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Fuel System : Solenoid And Mounting (Key Stop Type)
| 01***20 | Bolt | 4 |
| 01***50 | Bolt - Torque Converter Totransmission Mounting | 2 |
| 01***03 | Nut? L.H. Thread,L.H. Thread | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Fuel System : Water Separator
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 60***00 | Water Separator A.,(4d105-5h? 4d105-5t) | 1 |
| 60***60 | Plug,Drain (4d105-5h? 4d105-5t) | 1 |
Lubricating Oil System
Komatsu : S6d105-1ww(S/N 63244-Up) : Lubricating Oil System : Lubricating Oil Cooler
| 01***25 | Bolt,(Without Auto Priming System) | 5 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
| 01***35 | Bolt,(Without Auto Priming System) | 16 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Lubricating Oil System : Lubricating Oil Cooler (Cold Terrain Spec.)
| 01***25 | Bolt,(Without Auto Priming System) | 7 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
| 01***35 | Bolt,(Without Auto Priming System) | 12 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Lubricating Oil System : Lubricating Oil Filter And Mounting
| 01***70 | Bolt | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Lubricating Oil System : Lubricating Oil Piping
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***95 | Bolt | 1 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Lubricating Oil System : Lubricating Oil Pump And Suction Pipe
| 01***25 | Bolt,(Without Auto Priming System) | 3 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***45 | Bolt,(S6d155-4b) | 1 |
Komatsu : S6d105-1ww(S/N 63244-Up) : Lubricating Oil System : Turbocharger Lubricating Oil Piping
| 01***22 | Bolt,(Cold Terrain Spec.) | 2 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
S6D105-1WW(S/N 63244-UP) serial number reference
The engine serial number is stamped on the engine block, typically on the left side near the injection pump or on a metal data plate affixed to the block. The prefix is part of the engine model code (S6D105-1WW) found on this plate, distinct from the machine chassis serial number.
| Prefix | Identifies | Notes |
|---|---|---|
| S6D105-1WW | Turbocharged, water-cooled aftercooler, inline 6-cylinder diesel engine | Serial range 63244-UP. Factory spec sheet for Komatsu S6D105-1WW engine parts catalog. Sourced per published references catalog listing and DK Engine Parts equipment guide. No other prefixes identified for this specific engine in the provided sources. |
Frequently asked questions
What engine does the Komatsu S6D105-1WW use?
It uses a Komatsu 6D105 series, six-cylinder, turbocharged, direct-injection diesel engine with a mechanical fuel system, delivering approximately 170 horsepower and 550 lb-ft of torque.
What is the operating weight of machines using this engine?
Operating weight varies by configuration and series, typically ranging from 20,000 to 50,000 lb for host machines like the PC200-3 excavator and WA300-1 wheel loader.
What replaced the S6D105-1WW engine?
It was succeeded by electronically controlled engines in the SAA6D107 and SAA6D114 series to meet stricter emissions standards, though the S6D105-1WW remains in service on older PC200 and WA300 platforms.
What S6D105-1WW(S/N 63244-UP) owners discuss
What are the known powertrain and hydraulic behaviors for the Komatsu S6D105-1WW engine series?
What undercarriage and wear patterns are typical for machines powered by this engine?
What are the common engine quirks and maintenance requirements for the S6D105-1WW series?
What are the common electrical and sensor issues reported for this engine platform?
What should be checked when buying a used machine with the S6D105-1WW engine (S/N 63244-UP)?
How does the S6D105-1WW engine's hydraulic system behavior differ between cold and hot operation?
What is the critical safety fix regarding the main safety valve and hydraulic system integrity?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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