Komatsu S6D110-1B(S/N 50195-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu S6D110-1B engine (S/N 50195-UP) is a 6-cylinder, turbocharged diesel powerplant belonging to the 110 Series. Manufactured from the mid-1990s through the early 2000s, it served as the primary power source for the PC200-5 and PC200LC-5 excavator families, as well as the WA350-1 wheel loader series. This engine succeeded the naturally aspirated 6D110 series and was later replaced by the S6D114E-1 in newer machine generations. The S6D110-1B configuration was offered in various emissions and regional packages, typically delivering approximately 147 kW (197 hp) of net power.
Across its production life, the S6D110-1B evolved from the earlier S6D110-1A, incorporating updated fuel injection calibration and turbocharger mapping to improve torque response and fuel efficiency. The machine remains highly relevant in the used and parts market due to the massive installed base of PC200-5 series excavators. Its robust cast-iron block and simple mechanical fuel system make it a favorite for rebuild; widespread availability of aftermarket inframe overhaul kits and cylinder components ensures long-term parts support for aging fleets.
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 S6D110-1B(S/N 50195-UP) specifications
Engine
| Model | S6D110-1B |
| Series | 110 Series |
| Cylinders | 6 |
| Displacement | 11 liters |
| Emissions Tier | Not documented for this exact serial range — verify with your dealer |
| Gross/Net Power | 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 S6D110-1B(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 S6D110-1B(S/N 50195-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu KOWA fluid analysis at every 500-hour interval to monitor wear metals (iron, copper, lead) and contaminants (silicon, sodium) in the S6D110-1B engine oil. Check coolant SCA concentration levels to prevent cavitation erosion in the cylinder liners. Monitor hydraulic oil particle count and viscosity to detect pump wear early. Track fuel dilution and soot levels in the engine oil to assess combustion efficiency and filter loading status.
Corrective & Common Repairs
Address common S6D110-1B failures by inspecting the turbocharger shaft play and housing cracks during 1000-hour services. Replace worn injector O-rings if blue smoke or excessive oil consumption occurs. Check the water pump impeller for erosion if coolant flow drops. Inspect the fuel lift pump diaphragm for leaks. Replace worn piston rings and cylinder liners if compression drops below specification, often indicated by hard starting or loss of power.
Overhaul & Rebuild Points
Perform an inframe overhaul on the S6D110-1B when wear measurements exceed limits or compression is low. Replace pistons, rings, and liners as a set. Inspect the crankshaft for journal wear and replace if out of tolerance. Check the camshaft lobes and lifters for scoring. Replace all gaskets and seals during the rebuild. Verify turbocharger clearance and replace if necessary to ensure proper air intake for the new engine configuration.
Seasonal & Environment Servicing
In cold climates, use Komatsu Super Coolant AF-NAC at the correct dilution ratio to prevent freezing and boiling. Check battery hold-down and terminals for corrosion in wet environments. Inspect air intake systems for moisture accumulation in humid conditions. Grease all pivot points more frequently in dusty or abrasive environments to prevent premature undercarriage and linkage wear. Ensure the radiator and oil cooler fins are clean to maintain optimal operating temperatures.
S6D110-1B(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 → |
| 6712-81-8620 | Plate? Caution,Additional Fuel Filter | Fuel system service | Check fitment → |
| 6712-81-8660 | Plate? Caution,Additional Fuel Filter | Fuel system service | Check fitment → |
| 600-311-8221 | Cartridge,Engine Fuel Filter | Fuel system service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
S6D110-1B(S/N 50195-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft speed sensor failure | Broken sensor, wiring issue, or connector corrosion | Replace the speed sensor and verify the voltage at the pin connector |
| CA111 | Internal engine controller fault | ECM hardware or software failure | Replace or reprogram the ECM |
| CA441 | Battery voltage too low | Weak battery, poor connections, or alternator failure | Replace the alternator or battery; check the voltage regulator |
| CA442 | Battery voltage too high | Faulty voltage regulator or alternator overcharging | 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 |
| 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 |
| CA559 | Fuel pressure low | Fuel pump regulator (IMV/PCV) malfunction | Evaluate fuel pump regulator (IMV/PCV) |
| AA10NX | Air cleaner clogging | Dirty or blocked air filter element | Replace the air filter |
| B@BCNS | Engine coolant overheating | Low coolant, failed fan belt, or blocked radiator fins | Check radiator fins, fan belt, and coolant level |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
S6D110-1B(S/N 50195-UP) attachments & work tools
Wheel Loader Buckets
The Komatsu WA350-1 and WA350-1B wheel loaders, which utilize the S6D110-1B engine for serial numbers 10001-Up and A11604-Up, are equipped with standard front-mounted buckets. Typical capacities for this machine class range from 3.0 to 4.0 cubic meters (3.9 to 5.2 cubic yards), depending on material density and specific bucket profile options.
Excavator Attachments
The S6D110-1B engine is specified for the PC280LC-3 excavator (serial 10001-Up) and the PC200-5/PC200LC-5 series. These machines support standard digging buckets, trenching buckets, and heavy-duty rock buckets. Coupler systems vary by configuration, with some models offering quick-attach mechanisms for rapid tool changes.
Grader Blades and Rippers
The GD615A-1 motor grader, powered by the S6D110-1B engine for serial numbers 50001-Up, utilizes a moldboard blade for grading operations. Ripper attachments are available for site preparation, with mounting points integrated into the rear frame structure.
Hydraulic Circuit Requirements
Work tools requiring auxiliary hydraulic flow, such as breakers or mulchers, must be connected to the machine's auxiliary hydraulic circuits. The S6D110-1B engine provides the necessary power to the main hydraulic pump, but specific flow rates and pressures depend on the host machine's hydraulic kit configuration.
Factory Guarding and Protection
Komatsu offers factory-installed guarding options for the S6D110-1B engine and host machine, including rock guards, stone traps, and undercarriage protection. These options are designed to enhance durability in abrasive environments and are typically specified at the time of purchase or through authorized dealer channels.
All S6D110-1B(S/N 50195-UP) assemblies by section
Every catalogued assembly group for the Komatsu S6D110-1B(S/N 50195-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Accessory
Komatsu : S6d110-1b(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 : S6d110-1b(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 |
Cooling System
Komatsu : S6d110-1b(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 : S6d110-1b(S/N 50195-Up) : Cooling System : Water Pump And Cooling Fan (For 25a Alternator)
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***25 | Bolt,(Without Auto Priming System) | 2 |
| 01***30 | Bolt,(Cold Terrain Spec.) | 3 |
Komatsu : S6d110-1b(S/N 50195-Up) : Cooling System : Water Pump And Cooling Fan (For 35a? 50a Alternator)
| 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 : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(S/N 50195-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) | 8 |
Komatsu : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(S/N 50195-Up) : Cylinder Head : Air Intake Manifold And Connection
| 01***20 | Bolt | 2 |
| 01***50 | Bolt,(For Trimming Dozer) | 2 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 5 |
Komatsu : S6d110-1b(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 : S6d110-1b(S/N 50195-Up) : Cylinder Head : Cylinder Head Cover(#53587-)
| 07***23 | Clamp - Hose | 1 |
| 07***00 | Clip | 1 |
| 07***30 | Clip | 1 |
Komatsu : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(S/N 50195-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 : S6d110-1b(S/N 50195-Up) : Electrical System : Alternator And Mounting (25a? 35a? 50a) (Alternator With Hardening Pulley)
| 01***65 | Bolt,(For Alternator Bracket Mount) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***70 | Bolt,(With Wear Guard) | 1 |
Komatsu : S6d110-1b(S/N 50195-Up) : Electrical System : Heater Switch
| 60***70 | Switch,Air Intake Heater | 1 |
Komatsu : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 |
Fuel System
Komatsu : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Coupling)
| DK***00 | Coupling | 1 |
| DK***00 | Washer,Lock | 2 |
| DK***00 | Bolt | 6 |
Komatsu : S6d110-1b(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 : S6d110-1b(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)
| DK***20 | Guide Lever Ass'Y | 1 |
| DK***00 | Adapter | 1 |
| DK***00 | Spring | 1 |
Komatsu : S6d110-1b(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)
| DK***00 | Spring,Governor | 1 |
| DK***80 | Shim? 0.5mm | 0 |
| DK***00 | Washer,Spring | 1 |
Komatsu : S6d110-1b(S/N 50195-Up) : Fuel System : Fuel Injection Pump (Pump)
| DK***00 | Seat,Spring | 6 |
| DK***20 | Valve,Delivery | 6 |
| DK***20 | Bolt | 1 |
Komatsu : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 : S6d110-1b(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 |
S6D110-1B(S/N 50195-UP) serial number reference
The S6D110-1B engine PIN plate is located on the engine block, typically on the left side near the injection pump or on a metal plate affixed near the valve cover. Read the prefix by identifying the first three characters of the machine model code (e.g., WA3) which indicates the equipment family and size class, then match the engine suffix (-1B) to the specific emissions and generation variant listed in the factory parts catalog.
| Prefix | Identifies | Notes |
|---|---|---|
| WA350 | Wheel Loader | S6D110-1A/1B engine fitted to WA350-1/1B/1M series. Serial break at 10001-Up and A11604-Up. Verify with dealer for exact configuration mapping. |
Frequently asked questions
What engine does the Komatsu S6D110-1B (S/N 50195-UP) use?
It uses the Komatsu S6D110-1B, a 6-cylinder, turbocharged, direct-injection diesel engine from the 110 Series, typically producing 147 kW (197 hp).
What is the operating weight of the machine powered by this engine?
Operating weight varies by configuration and attachment. For the PC200-5 series excavators commonly equipped with this engine, the weight typically ranges from 20,000 to 22,000 lbs (9,072 to 9,979 kg).
What engine replaced the S6D110-1B?
The S6D110-1B was succeeded by the S6D114E-1 engine in later Komatsu excavator and loader models, offering increased displacement and updated emissions compliance.
Need a specific S6D110-1B(S/N 50195-UP) part?
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