Komatsu S6D110-1A(S/N 50195-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu S6D110-1A is a turbocharged, aftercooled diesel engine belonging to the 110 Series, primarily powering the WA350-1 wheel loader and PC200-5 excavator families. Production for this specific serial range (50195-UP) spans the late 1990s to early 2000s, serving as a direct successor to the 6D105 series and preceding the S6D114E-1 in the WA350 line. The engine delivers approximately 170 horsepower, fitting into the mid-size power class for its era. Configurations varied by machine application, with distinct mounting and accessory setups for wheel loaders versus excavators, though the core block architecture remained consistent across the S6D110-1A and SA6D110-1 variants.
Across the 110 Series generation, Komatsu refined the fuel injection timing and turbocharger response to meet evolving emissions standards while maintaining high torque output. The S6D110-1A remains critical in the used and parts market because it serves as the common powerplant for high-volume machines like the PC200-5 and WA350-1, which are now widely circulated globally. Its widespread use ensures a robust aftermarket supply of remanufactured components, making it a cost-effective choice for fleet operators managing older but reliable earthmoving 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 S6D110-1A(S/N 50195-UP) specifications
Engine
| Model | S6D110-1A |
| Series | 110 Series |
| Configuration | Turbocharged, aftercooled diesel |
| 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 S6D110-1A(S/N 50195-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 S6D110-1A(S/N 50195-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Monitor engine oil for wear metals indicating piston ring or cylinder liner wear, specific to the S6D110-1A's splash-lubricated steering-clutch case. Use KOWA analysis to detect coolant contamination via sodium levels. Check hydraulic oil for ISO cleanliness and pump wear metals. Inspect final drive oil for gear wear particles, as these systems lack internal filtration. Track charge pressure trends to identify turbocharger degradation early.
Corrective & Common Repairs
Address common S6D110-1A failures by inspecting the hydraulic control-valve assembly for leaks, which often serve as the tank. Replace worn steering-clutch and brake linings in the splash-lubricated case. Check the turbocharger shaft play and replace worn seals. Inspect the fuel injection pump for timing drift. Replace cracked hydraulic hoses at high-stress pivot points on the WA350-1 loader or PC200-5 excavator boom.
Overhaul & Rebuild Points
Perform inframe overhaul at 10,000–12,000 hours for the S6D110-1A. Replace piston rings, liners, and bearings. Inspect the cylinder head for warpage and valve seat wear. Check the crankshaft for journal wear and replace if out of spec. Replace the turbocharger if shaft play exceeds limits. Rebuild the hydraulic pump if flow drops below 90% of rated capacity. Inspect the engine block for cracks around the coolant passages.
Seasonal & Environment Servicing
In cold climates, use low-temperature fuel additives to prevent waxing in the S6D110-1A's direct injection system. Check the coolant freeze point before winter. In dusty environments, clean the air filter more frequently and inspect the intake manifold for debris. In high-humidity areas, check the battery electrolyte level and clean terminals to prevent corrosion. Flush the radiator and oil cooler cores to remove debris and maintain cooling efficiency.
S6D110-1A(S/N 50195-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 → |
| 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 → |
| 09637-30262 | 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.
S6D110-1A(S/N 50195-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft speed sensor and backup speed sensor failure | Faulty crankshaft speed sensor, broken wiring harness, or corroded connector at the sensor pin | Inspect the speed sensor wiring and connector for damage; replace the sensor if voltage is absent at the pin |
| CA441 | Battery voltage too low | Discharged battery, failing alternator, or loose/corroded battery cables | Check battery charge state and terminal connections; test alternator output voltage |
| CA442 | Battery voltage too high | Failed voltage regulator or malfunctioning alternator causing overcharging | Test alternator output; replace the alternator or voltage regulator if output exceeds specifications |
| CA144 | Coolant temperature sensor feedback voltage too high | Open circuit in the coolant temperature sensor wiring or a failed sensor | Check the sensor wiring for breaks or disconnection; replace the coolant temperature sensor |
| CA145 | Coolant temperature sensor feedback voltage too low | Short circuit in the coolant temperature sensor wiring or a failed sensor | Inspect the sensor wiring for shorts to ground; replace the coolant temperature sensor |
| CA122 | Intake air pressure sensor feedback voltage too high | Faulty intake air pressure sensor or open circuit in the sensor wiring | Verify the intake pressure sensor operation and inspect the wiring harness for damage |
| CA123 | Intake air pressure sensor feedback voltage too low | Short circuit in the intake air pressure sensor wiring or a blocked air intake | Check for sensor shorting and inspect the air filter and intake path for restrictions |
| CA234 | Engine overspeed | Throttle calibration error, operator misuse, or faulty load cycle control | Verify throttle calibration and inspect the engine load cycle for mechanical binding |
| CA451 | Common rail pressure sensor feedback value too high | Malfunctioning rail pressure sensor or actual overpressure condition in the fuel system | Diagnose the fuel rail pressure sensor circuit and check for physical blockages in pump lines |
| CA452 | Common rail pressure sensor feedback value too low | Malfunctioning rail pressure sensor or low fuel pressure due to pump issues | Diagnose the fuel rail pressure sensor and evaluate the fuel pump regulator (IMV/PCV) |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
S6D110-1A(S/N 50195-UP) attachments & work tools
Wheel Loader Attachments
The Komatsu WA350-1 wheel loader is the primary machine platform for the S6D110-1A engine (serial 50195-Up). Factory configurations include standard front buckets and optional rear-mounted dozer blades for site grading. Hydraulic circuits for quick couplers and auxiliary tools are integrated into the loader's lift arm system.
Excavator Attachments
The PC280LC-3 excavator utilizes the S6D110-1A engine for serial numbers 10001-Up. Standard work tools include heavy-duty digging buckets and trenching buckets. Optional attachments include hydraulic breakers and tilt rotators, which require specific hydraulic kit configurations for auxiliary flow and pressure.
Motor Grader Attachments
The GD615A-1 motor grader (serial 50001-Up) is powered by the S6D110-1A engine. Standard equipment includes a moldboard blade with angle and tilt capabilities. Optional work tools include single-shank or multi-shank rippers for soil reclamation, mounted on the rear frame with hydraulic parallelogram linkage.
Coupler and Mounting Systems
Wheel loaders and excavators in this class typically utilize proprietary Komatsu quick-attach systems or standard pin-on bucket mounts. Hydraulic couplers for auxiliary tools are mounted on the lift arms or boom, requiring specific hose routing kits to maintain pressure integrity during tool rotation and articulation.
Hydraulic Kit Requirements
Attachments requiring auxiliary hydraulics, such as tilt rotators or breakers, necessitate specific hydraulic kit installations. These kits include high-pressure hoses, control valves, and flow dividers to ensure proper tool operation without compromising the machine's primary lift or swing functions.
Factory Guarding and Options
Factory configurations often include optional guarding for hydraulic lines and fuel tanks to protect against impact damage. Cab options include ROPS/FOPS certified structures with integrated monitoring systems for engine temperature, oil pressure, and hydraulic system status to ensure safe operation with heavy attachments.
All S6D110-1A(S/N 50195-UP) assemblies by section
Every catalogued assembly group for the Komatsu S6D110-1A(S/N 50195-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Accessory
Komatsu : S6d110-1a(S/N 50195-Up) : Accessory : Air Compressor
| 61***11 | Air Compressor Ass'Y,(See Fig.0711) | 1 |
| 61***12 | Air Compressor Ass'Y | 1 |
| DK***00 | Cylinder | 1 |
Komatsu : S6d110-1a(S/N 50195-Up) : Accessory : Air Compressor And Piping
| 04***16 | Fitting Wedge | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 4 |
| 07***16 | Gasket,Air Compressor Piping | 1 |
Komatsu : S6d110-1a(S/N 50195-Up) : Accessory : Air Compressor And Piping (Except Japan) (Cold Terrain Spec.)(#55001-)
| 04***16 | Fitting Wedge | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 4 |
| 07***16 | Gasket,Air Compressor Piping | 1 |
Cooling System
Komatsu : S6d110-1a(S/N 50195-Up) : Cooling System : Corrosion Resistor And Piping
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 4 |
| 01***29 | Washer,Spring (Cold Weather Spec.) | 4 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cooling System : Water Pump And Cooling Fan
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cooling System : Water Pump And Cooling Fan (Except Japan) (Cold Terrain Spec.)(#55001-)
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cooling System : Water Punp And Cooling Fan (Except Japan) (Cold Terrain Spec.)(#55001-)
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
Cylinder Block
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Block : Camshaft And Tappet
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 2 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Block : Crankshaft (Except Japan)
| 01***25 | Bolt - Rear Guard Mounting | 6 |
| 01***45 | Bolt,Nylock | 1 |
| 01***25 | Bolt,L.H. (For Add. Air Compressor) | 6 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Block : Crankshaft (With Air Conditioner)
| 01***55 | Bolt,(For France Noise Suppression) | 6 |
| 01***75 | Bolt,(For 75a Alternator) | 6 |
| 01***45 | Bolt,Nylock | 1 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Block : Cylinder Block(#50195-52506)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 25 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Block : Cylinder Block(#52507-)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***16 | Bolt, Mount Solenoid Valve | 2 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Block : Flywheel And Flywheel Housing (Key Stop Type)
| 01***40 | Bolt,(Dust And Dirt Protection) | 9 |
| 01***45 | Bolt,(Cold Terrain Spec.) | 8 |
| 01***55 | Bolt,(For France Noise Suppression) | 4 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Block : Flywheel And Flywheel Housing (Pedal Stop Type) (Except Japan) (Cold Terrain Sprc.)
| 01***40 | Bolt,(Dust And Dirt Protection) | 9 |
| 01***45 | Bolt,(Cold Terrain Spec.) | 8 |
| 01***55 | Bolt,(For France Noise Suppression) | 4 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Block : Front Cover And Gear
Komatsu : S6d110-1a(S/N 50195-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 : S6d110-1a(S/N 50195-Up) : Cylinder Block : Oil Pan (Except Japan) (Cold Terrain Spec.)(#55001-)
| 01***22 | Bolt,(Cold Terrain Spec.) | 29 |
| 01***25 | Bolt,(Without Auto Priming System) | 8 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 1 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Block : Piston And Connecting Rod
| 04***18 | Ring, Retaining | 2 |
| 61***10 | Bolt,Connecting Rod | 2 |
| 61***11 | Bolt,Connecting Rod | 2 |
Cylinder Head
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Head : Air Cleaner And Mounting
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 4 |
| 01***45 | Bolt,(For Suction? Reversible Fan) | 4 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Head : Air Intake Manifold And Connection
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Head : Cylinder Head
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Head : Cylinder Head Cover(#50195-53586)
| 60***10 | Seal (K1) | 1 |
| 61***20 | Screw | 4 |
| 61***30 | Washer,(B) | 4 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Head : Cylinder Head Cover(#53587-)
| 07***23 | Clamp - Hose | 1 |
| 07***00 | Clip | 1 |
| 07***30 | Clip | 1 |
Komatsu : S6d110-1a(S/N 50195-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 : S6d110-1a(S/N 50195-Up) : Cylinder Head : Muffler And Mounting
| 01***40 | Bolt,(Dust And Dirt Protection) | 4 |
| 01***45 | Bolt,(For Suction? Reversible Fan) | 4 |
| 01***95 | Bolt,(For Reversible Fan) | 2 |
Komatsu : S6d110-1a(S/N 50195-Up) : Cylinder Head : Muffler And Mounting (Except Japan) (Cold Terrain Spec.)
| 01***40 | Bolt,(Dust And Dirt Protection) | 4 |
| 01***45 | Bolt,(For Suction? Reversible Fan) | 4 |
| 01***95 | Bolt,(For Reversible Fan) | 2 |
Komatsu : S6d110-1a(S/N 50195-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 : S6d110-1a(S/N 50195-Up) : Cylinder Head : Turbocharger (Except Japan)
| 61***00 | Turbocharger Ass'Y,(T04b59-39) | 1 |
| 61***01 | Turbocharger Ass'Y,(T04b59-39) | 1 |
| GA***00 | Clamp | 3 |
Electrical System
Komatsu : S6d110-1a(S/N 50195-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 : S6d110-1a(S/N 50195-Up) : Electrical System : Alternator (35a)
| 60***10 | Alternator A. (35a),(With Non Hardening Pulley) | 1 |
| 60***40 | Alternator A. (35a),(With Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
Komatsu : S6d110-1a(S/N 50195-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 : S6d110-1a(S/N 50195-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 : S6d110-1a(S/N 50195-Up) : Electrical System : Alternator And Mounting (25a? 35a? 50a? 75a)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***70 | Bolt,(With Wear Guard) | 1 |
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
Komatsu : S6d110-1a(S/N 50195-Up) : Electrical System : Heater Switch And Timer
| 60***61 | Timer,Bi-Metal | 1 |
| (6***0) | Switch,Heater (See Fig.0131 Or 0131a) | 1 |
Komatsu : S6d110-1a(S/N 50195-Up) : Electrical System : Starting Motor (7.5kw)(#50195-50491)
| 60***60 | Starting Motor Ass'Y,(7.5kw) | 1 |
| KD***20 | Magnetic Switch Assembly | 1 |
| KD***40 | Spring,Spring | 4 |
Komatsu : S6d110-1a(S/N 50195-Up) : Electrical System : Starting Motor (7.5kw)(#50492-53240)
| 60***50 | Starting Motor Ass'Y,(7.5kw) (S6d105-1x) | 1 |
| KD***20 | Magnetic Switch Assembly | 1 |
| KD***40 | Spring,Spring | 4 |
Komatsu : S6d110-1a(S/N 50195-Up) : Electrical System : Starting Motor (7.5kw)(#53241-)
| 60***50 | Starting Motor Ass'Y,(7.5kw) | 1 |
| KD***60 | Shift Lever Assembly | 1 |
| KD***40 | Spring,Spring | 4 |
Komatsu : S6d110-1a(S/N 50195-Up) : Electrical System : Starting Motor And Mounting (7.5kw)
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 3 |
| 01***30 | Bolt, Mounting - Front Hand Rails | 3 |
| 01***36 | Washer,Radio Controlled Slag Handling | 3 |
Engine Kit
Komatsu : S6d110-1a(S/N 50195-Up) : Engine Kit : Gasket Kit
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
| 07***60 | O-Ring,Cage? Transfer Gear | 1 |
Komatsu : S6d110-1a(S/N 50195-Up) : Engine Kit : Gasket Kit (Except Japan) (Cold Terrain Spec.)(#55001-)
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
| 07***60 | O-Ring,Cage? Transfer Gear | 1 |
Fuel System
Komatsu : S6d110-1a(S/N 50195-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 : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Filter And Piping
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***30 | Washer,Spring(Sandy?Dusty Terrain S.) | 2 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Coupling) (Except Japan) (Cold Terrain Spec.)
| DK***20 | Plate | 1 |
| DK***00 | Coupling | 1 |
| DK***00 | Washer,Lock | 2 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Coupling)(#50195-54719)
| DK***20 | Plate | 1 |
| DK***00 | Coupling | 1 |
| DK***00 | Washer,Lock | 2 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Coupling)(#54720-)
| DK***00 | Coupling | 1 |
| DK***00 | Washer,Lock | 2 |
| DK***00 | Bolt | 6 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Feed Pump)
| DK***20 | Bolt, Joint | 1 |
| DK***20 | Pump,Priming | 1 |
| DK***00 | Guide | 2 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Feed Pump) (Except Japan) (Cold Terrain Spec.)
| DK***20 | Bolt, Joint | 1 |
| DK***20 | Pump,Priming | 1 |
| DK***00 | Guide | 2 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2) (Except Japan) (Cold Terrain Spec.)
| DK***00 | Adapter | 1 |
| DK***31 | Governor Ass'Y | 1 |
| DK***80 | Nut | 1 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#50195-54719)
| DK***41 | Governor Ass'Y | 1 |
| DK***20 | Guide Lever Ass'Y | 1 |
| DK***00 | Adapter | 1 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#54720-)
| DK***20 | Guide Lever Ass'Y | 1 |
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2) (Except Japan) (Cold Terrain Spec.)
| DK***00 | Spring,Governor | 1 |
| DK***20 | Capsule,Spring | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#50195-54719)
| DK***00 | Spring,Governor | 1 |
| DK***80 | Shim? 0.5mm | 0 |
| DK***00 | Washer,Spring | 1 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#54720-)
| DK***00 | Spring,Governor | 1 |
| DK***80 | Shim? 0.5mm | 0 |
| DK***00 | Washer,Spring | 1 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Pump) (Except Japan) (Cold Terrain Spec.)
| 61***60 | Injection Pump Ass'Y | 1 |
| DK***00 | Seat,Spring | 6 |
| DK***20 | Valve,Delivery | 6 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Pump)(#50195-54719)
| 61***50 | Injection Pump Ass'Y | 1 |
| DK***00 | Seat,Spring | 6 |
| DK***20 | Valve,Delivery | 6 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Pump)(#54720-)
| 61***51 | Injection Pump Ass'Y | 1 |
| DK***00 | Seat,Spring | 6 |
| DK***20 | Valve,Delivery | 6 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Timer) (Except Japan) (Cold Terrain Spec.)
| DK***00 | Shim? 0.15mm | 0 |
| DK***20 | Flange | 1 |
| DK***40 | Shim? 0.20mm | 0 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Timer)(#50195-54719)
| DK***00 | Shim? 0.15mm | 0 |
| DK***20 | Flange | 1 |
| DK***40 | Shim? 0.20mm | 0 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump And Piping
| 01***70 | Bolt | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Injection Pump And Piping (Except Japan) (Cold Terrain Spec.)
| 01***70 | Bolt | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Fuel Nozzle And Spill Pipe
| 01***55 | Bolt,(For Trimming Dozer) | 12 |
| 01***55 | Screw | 12 |
| 01***25 | Washer,Spring?(Sandy And Dusty Spec.) | 12 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Solenoid And Mounting (Key Stop Type)
| 01***20 | Bolt | 4 |
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***50 | Bolt - Torque Converter Totransmission Mounting | 2 |
Komatsu : S6d110-1a(S/N 50195-Up) : Fuel System : Water Separator (Except Japan)
| 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 : S6d110-1a(S/N 50195-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 : S6d110-1a(S/N 50195-Up) : Lubricating Oil System : Lubricating Oil Cooler (Except Japan) (Cold Terrain Spec.)(#55001-)
| 01***25 | Bolt,(Without Auto Priming System) | 7 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
| 01***35 | Bolt,(Without Auto Priming System) | 12 |
Komatsu : S6d110-1a(S/N 50195-Up) : Lubricating Oil System : Lubricating Oil Filter And Piping
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 1 |
| 01***95 | Bolt | 1 |
Komatsu : S6d110-1a(S/N 50195-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 : S6d110-1a(S/N 50195-Up) : Lubricating Oil System : Turbocharger Lubricating Oil Piping
| 01***22 | Bolt,(Cold Terrain Spec.) | 2 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
S6D110-1A(S/N 50195-UP) serial number reference
The engine PIN plate is riveted to the engine block, typically on the left side near the injection pump or on a metal data plate affixed near the valve cover. Read the prefix (the first letter or code at the start of the serial number) to identify the specific engine variant and generation.
| Prefix | Identifies | Notes |
|---|---|---|
| A | Komatsu S6D110-1A | Serial range 50195-UP. Identified in published references catalog listings and Oryx Parts engine identification guide as the specific variant for this serial block. The 'A' suffix denotes a specific application or market variant within the -1 generation; detailed meaning is not published by Komatsu and requires EPC confirmation. |
| B | Komatsu S6D110-1B | Serial range 10001-Up & A11604-Up. Identified in DK Engine Parts Equipment Guide as a variant of the S6D110-1A/1B family. Often fitted to WA350-1 series wheel loaders. Verify with dealer for exact machine fitment. |
Frequently asked questions
What engine does the Komatsu S6D110-1A use?
The Komatsu S6D110-1A is a 6-cylinder, turbocharged, aftercooled diesel engine from the 110 Series, producing approximately 170 horsepower.
What is the operating weight of machines using this engine?
Operating weight varies by configuration and series. For the WA350-1 wheel loader, it ranges from 34,000 to 35,000 lb. For the PC200-5 excavator, it is approximately 42,000 lb.
What replaced the Komatsu S6D110-1A?
The S6D110-1A was succeeded by the S6D114E-1 in the WA350 series and later by Tier 4 compliant engines like the SAA6D107E-3 in newer excavator models.
What S6D110-1A(S/N 50195-UP) owners discuss
What are the known powertrain and hydraulic behaviors for the Komatsu S6D110-1A engine series?
What undercarriage or wear patterns are typical for machines using this engine?
What are the common engine quirks or failure points for the S6D110-1A series?
What are the common electrical or sensor issues associated with this engine?
What should be checked when buying a used machine with the S6D110-1A engine (S/N 50195-UP)?
What fluid specifications are recommended for the S6D110-1A engine and associated systems?
What is a safety-critical fix related to the cooling system for this engine?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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