Komatsu S6D140-1G(S/N 11455-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu S6D140-1G engine (S/N 11455-UP) is a six-cylinder, turbocharged, and aftercooled diesel unit manufactured since 2017. It features a 14.0-liter (854 cubic inches) displacement with a 140mm bore. This engine powers heavy-duty Komatsu machinery, including the WA500-1L wheel loader and various dozer and excavator models. It is part of the S6D140 series, which succeeded earlier 6D140 variants and serves as a robust powertrain for mid-to-heavy class earthmoving equipment.
Across generations, the S6D140-1G incorporates advanced emissions technology and improved fuel efficiency compared to its predecessors. The machine remains significant in the used and parts market due to its widespread use in durable Komatsu fleets. Its modular design and availability of overhaul kits support long-term serviceability, making it a reliable choice for fleet managers seeking cost-effective maintenance and high uptime in demanding applications.
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 S6D140-1G(S/N 11455-UP) specifications
Engine
| Model | S6D140-1G |
| Series | 6D140-1 Series |
| Configuration | 6-cylinder, turbocharged, aftercooled diesel |
| Displacement | 14.0 L (854 cu in) |
| Bore | 140 mm |
| Gross/Net Power | Not documented for this exact serial range — verify with your dealer |
| 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 Speeds | 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 S6D140-1G(S/N 11455-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 S6D140-1G(S/N 11455-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize KOWA fluid analysis at every major service interval to monitor engine wear metals (iron, copper, lead, aluminum) and contaminants (silicon, sodium). Track hydraulic particle count and viscosity changes to detect pump or valve wear early. Monitor coolant pH, SCA concentration, and glycol content to prevent corrosion and overheating. Use KOMTRAX telematics to track load frequency and fault codes, enabling proactive scheduling before failures occur. Regular analysis extends component life and prevents unexpected downtime.
Corrective & Common Repairs
Address common S6D140-1G issues by inspecting the turbocharger and exhaust system for leaks or damage. Check fuel injectors and fuel feed pumps for proper spray pattern and pressure. Inspect the water pump and cooling system for leaks or blockages. Verify electrical connections and sensors for corrosion or damage. Replace worn belts and hoses during scheduled intervals. Ensure proper engine oil pressure and address any abnormal gauge readings immediately to prevent severe engine damage.
Overhaul & Rebuild Points
Plan for in-frame or out-of-frame overhaul based on wear measurements and performance data. Key components include pistons, rings, liners, bearings, and gaskets. Use Komatsu Genuine Lubricants and OEM-spec filters during rebuilds. Follow factory specifications for valve adjustment and fuel injection pump calibration. Inspect the crankshaft and cylinder head for wear or cracks. Proper overhaul restores engine performance and efficiency, ensuring compliance with emissions standards and operational requirements.
Seasonal & Environment Servicing
Adjust maintenance for extreme temperatures and dusty environments. In cold weather, use appropriate grade engine oil and coolant to prevent freezing. Ensure DEF system is protected from freezing. In hot climates, monitor coolant temperature and clean radiator fins regularly. In dusty conditions, inspect air filter more frequently and replace as needed. Check undercarriage and track tension for wear from abrasive materials. Protect electrical components from moisture and corrosion. Regular environmental checks ensure reliable operation in diverse job site conditions.
S6D140-1G(S/N 11455-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 600-311-7131 | Cartridge,Fuel Filter | Fuel system service | Check fitment → |
| 6210-71-6201 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| (6210-71-6200) | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| (600-311-7130) | Cartridge,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.
S6D140-1G(S/N 11455-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft speed sensor and backup speed sensor failure | Faulty speed sensor, broken wiring harness, or corroded connector at the pin connector | Replace the speed sensor and verify voltage at the pin connector |
| CA111 | Internal engine controller fault (ECM critical internal failure) | Malfunction within the Electronic Control Module (ECM) | Replace or reprogram the ECM |
| CA451 | Common rail pressure sensor feedback value too high | Malfunction in the rail pressure sensor or actual overpressure condition | Diagnose the fuel rail pressure sensor or check pump lines |
| CA452 | Common rail pressure sensor feedback value too low | Fuel rail pressure sensor error or low pressure condition | Diagnose the fuel rail pressure sensor or check pump lines |
| CA122 | Intake air pressure sensor feedback voltage too high | Faulty intake pressure sensor 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 |
| CA153 | Intake air temperature sensor feedback voltage too high | Faulty Intake Air Temperature (IAT) sensor | Replace or test the IAT sensor |
| CA154 | Intake air temperature sensor feedback voltage too low | Faulty Intake Air Temperature (IAT) sensor | Replace or test the IAT sensor |
| CA234 | Engine overspeed | Throttle calibration error, engine load cycle issue, or operator misuse | Verify throttle calibration and engine load cycle |
| CA441 | Battery voltage too low | Weak battery or alternator failure | Replace the alternator or battery; check the voltage regulator |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
S6D140-1G(S/N 11455-UP) attachments & work tools
Wheel Loader Attachments
The S6D140-1G engine powers the WA500-1L wheel loader class. Factory configurations for this machine type typically include bucket sizes ranging from 3.0 to 4.5 cubic meters. Mounting systems utilize standard wheel loader quick couplers compatible with Komatsu's proprietary pin-grabber or pin-grabber-plus interfaces. Hydraulic kit requirements depend on the specific bucket profile and attachment weight, often necessitating high-flow auxiliary circuits for grapples or mulchers.
Bulldozer Attachments
The S6D140-1G engine is utilized in the D155A-2 and D155A-3 bulldozer series. Standard blade configurations include semi-U (SU) and universal (U) blades with capacities varying by series and ground conditions. Mounting systems employ the Komatsu quick-attach blade mounting frame with hydraulic tilt and angle cylinders. Factory guarding options often include heavy-duty side cutters and rear guards for rock or mining applications.
Mining Truck Attachments
The S6D140-1G engine is specified for the HM350-1L rigid dump truck. The primary attachment is the factory-designed cargo bed with capacities typically ranging from 35 to 40 metric tons. Mounting is fixed to the truck frame with hydraulic lift cylinders. Notable factory configurations include reinforced bed floors and side skirts for specific material densities.
Excavator Attachments
The S6D140-1G engine is not documented for the PC2000-11 or PC2000-8 excavator series in the provided sources; those models are associated with the S6D140E-2 series. For the S6D140-1G specifically, excavator attachment data is not available in the source text. Verify with your dealer for exact compatibility if the engine designation is confirmed for a specific excavator model.
All S6D140-1G(S/N 11455-UP) assemblies by section
Every catalogued assembly group for the Komatsu S6D140-1G(S/N 11455-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Cooling System
Komatsu : S6d140-1g(S/N 11455-Up) : Cooling System : Cooling Fan And Tension Pulley
| 01***16 | Bolt,(For Slag Handling) | 6 |
| 01***35 | Bolt - Torque Converter Totransmission Mounting | 6 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 6 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cooling System : Corrosion Resistor And Piping
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***40 | Bolt, Mount Master Brake Cylinder | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cooling System : Water Pump And Mounting
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 6 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***90 | Bolt, Fan Mounting | 3 |
Cylinder Block
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Block : Camshaft
| 01***20 | Bolt (M12-1.75x20) | 2 |
| 04***25 | Key, Plain Woodruff | 1 |
| 04***12 | Ring, Retaining | 24 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Block : Crankshaft
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
| 04***24 | Pin,Dowel (For No.3 Housing) | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Block : Cylinder Block Cover
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
| 01***65 | Bolt,(Except Japan) | 1 |
| 01***70 | Bolt, Mount Bracket And Oil Inlet Tube, Bolt | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Block : Cylinder Block(#11455-17625)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 7 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***16 | Washer,(With Water Separator) | 6 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Block : Cylinder Block(#17626-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 7 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***16 | Washer,(With Water Separator) | 6 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Block : Flywheel And Flywheel Housing
| 01***45 | Bolt,(For Slag Handling) | 8 |
| 01***60 | Bolt, Hanger Bearing Mounting | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Block : Front Cover And Front Support(#11455-12964)
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***10 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Block : Front Cover And Front Support(#12965-)
| 01***30 | Bolt,(For France Noise Suppression) | 4 |
| 01***10 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Block : Idler Gear
| 01***30 | Bolt,(Cold Terrain Spec.) | 6 |
| 01***80 | Bolt | 1 |
| 01***45 | Washer,(Without R.O.P.S.) | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Block : Oil Pan(#11455-14438)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 26 |
| 01***16 | Washer,Radio Controlled Slag Handling | 34 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Block : Oil Pan(#14439-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 40 |
| 01***16 | Washer,Radio Controlled Slag Handling | 40 |
| 04***14 | Pin, Dowel | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Block : Piston And Connecting Rod
| 02***13 | Pin, Dowel | 2 |
| 04***20 | Ring, Retaining | 12 |
| 62***40 | Metal Ass'Y | 6 |
Cylinder Head
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Head : Air Intake Manifold And Connection(#11455-15105)
| 01***10 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***75 | Bolt,(For Adjusting) | 12 |
| 01***35 | Bolt | 12 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Head : Air Intake Manifold And Connection(#15106-)
| 01***10 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***75 | Bolt,(For Adjusting) | 12 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Head : Cylinder Head(#11455-17048)
| 04***20 | Pin,Dowel (Welded) | 2 |
| 07***25 | O-Ring,Lubrication Valve | 1 |
| 07***08 | Plug (Kit) | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Head : Cylinder Head(#17049-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 6 |
| 02***04 | Plug, Pipe | 6 |
| 04***20 | Pin,Dowel (Welded) | 2 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Head : Exhaust Manifold And Turbocharger
| 01***45 | Bolt,(For Suction? Reversible Fan) | 3 |
| 01***50 | Bolt | 1 |
| 01***55 | Screw | 2 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Head : Muffler And Mounting
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***50 | Bolt | 3 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Head : Rocker Arm And Housing(#11455-17048)
| 01***90 | Bolt,(For No?1 And No?3 Housing) | 2 |
| 01***08 | Nut,R.H. Thread | 12 |
| 01***32 | Washer, (Without Emergency Steering) | 16 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Head : Rocker Arm And Housing(#17049-19971)
| 01***20 | Bolt | 1 |
| 01***90 | Bolt,(For No?1 And No?3 Housing) | 2 |
| 01***08 | Nut,R.H. Thread | 12 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Head : Rocker Arm And Housing(#19972-)
| 01***20 | Bolt | 1 |
| 01***90 | Bolt,(For No?1 And No?3 Housing) | 2 |
| 01***80 | Bolt (M12-2.00x80) | 6 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Head : Rocker Arm Housing Cover(#11455-19971)
| 01***65 | Bolt,R.H | 18 |
| 62***10 | Cover,Rocker Arm Housing | 6 |
| 62***20 | Washer | 18 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Head : Rocker Arm Housing Cover(#19972-)
| 01***55 | Screw | 18 |
| 62***11 | Cover,Rocker Arm Housing | 6 |
| 62***20 | Gasket, Rocker Lever Housing | 6 |
Komatsu : S6d140-1g(S/N 11455-Up) : Cylinder Head : Turbocharger
| 01***16 | Bolt,(For Slag Handling) | 4 |
| 01***16 | Bolt | 8 |
| 04***08 | Pin, Dowel | 1 |
Electrical System
Komatsu : S6d140-1g(S/N 11455-Up) : Electrical System : Alternator (35a) (With Non Hatdening Pulley)
| 60***20 | Alternator A. (35a),(With Non Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Electrical System : Alternator (50a) (With Non Hardening Pulley)
| 60***60 | Alternator A. (50a) | 1 |
| SD***X0 | Washer | 1 |
| SD***10 | Nut | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Electrical System : Alternator And Mounting (35a? 50a) (Alternator With Non Hardeningpulley)
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
| 01***00 | Bolt, Mount Back-Up Alarm | 1 |
| 01***30 | Bolt | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Electrical System : Starting Motor (7.5kw)
| 60***80 | Starting Motor Ass'Y,(7.5kw) | 1 |
| KD***20 | Magnetic Switch Assembly | 1 |
| KD***40 | Spring,Spring | 4 |
Komatsu : S6d140-1g(S/N 11455-Up) : Electrical System : Starting Motor And Mounting (7.5kw)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***40 | Bolt,(With Center Guard) | 3 |
| 01***16 | Washer,(With Water Separator) | 1 |
Fuel System
Komatsu : S6d140-1g(S/N 11455-Up) : Fuel System : Fuel Filter And Piping
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***15 | Bolt,(With Air Conditioner Type) | 2 |
| 01***16 | Washer,Radio Controlled Slag Handling | 4 |
Komatsu : S6d140-1g(S/N 11455-Up) : Fuel System : Fuel Injection Pump (Coupling)(#11455-14770)
| DK***00 | Coupling,Cross | 1 |
| DK***00 | Nut | 2 |
| DK***00 | Bolt | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Fuel System : Fuel Injection Pump (Coupling)(#14771-)
| DK***00 | Coupling,Cross | 1 |
| DK***00 | Nut | 2 |
| DK***00 | Bolt | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Fuel System : Fuel Injection Pump (Feed Pump)(#11455-14770)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***20 | Tappet | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Fuel System : Fuel Injection Pump (Feed Pump)(#14771-)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***20 | Tappet | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#11455-14770)
| DK***20 | Flyweight Ass'Y | 1 |
| DK***20 | Guide Lever Ass'Y | 1 |
| DK***00 | Nut,Lock | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#14771-)
| DK***20 | Flyweight Ass'Y | 1 |
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***20 | Guide Lever Ass'Y | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#11455-14770)
| DK***00 | Spring,Governor | 1 |
| DK***20 | Lever | 1 |
| DK***00 | Nut,Cap | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#14771-)
| DK***00 | Spring,Governor | 1 |
| DK***20 | Lever | 1 |
| DK***20 | Capsule,Spring | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Fuel System : Fuel Injection Pump (Pump)(#11455-14770)
| 62***80 | Injection Pump A | 1 |
| DK***30 | Bearing,Roller | 2 |
| DK***20 | Housing | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Fuel System : Fuel Injection Pump (Pump)(#14771-)
| 62***81 | Injection Pump A | 1 |
| DK***30 | Bearing,Roller | 2 |
| DK***20 | Housing | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Fuel System : Fuel Injection Pump And Piping
| 01***16 | Bolt,(For Slag Handling) | 3 |
| 01***25 | Bolt,(For Automatic) | 4 |
| 01***35 | Bolt | 4 |
Komatsu : S6d140-1g(S/N 11455-Up) : Fuel System : Fuel Nozzle And Spill Pipe(#11455-12363)
| 01***20 | Bolt, Mount Main Relief Valve | 6 |
| 01***10 | Nut,(Fig.F2820-01a3-12) | 6 |
| 07***21 | O-Ring,Oil Cooler Pipe | 12 |
Komatsu : S6d140-1g(S/N 11455-Up) : Fuel System : Fuel Nozzle And Spill Pipe(#12364-)
| 01***20 | Bolt, Mount Main Relief Valve | 6 |
| 01***10 | Nut,(Service Only) | 6 |
| 07***21 | O-Ring,Oil Cooler Pipe | 12 |
Lubricating Oil System
Komatsu : S6d140-1g(S/N 11455-Up) : Lubricating Oil System : Lubricating Oil Cooler
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 13 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
Komatsu : S6d140-1g(S/N 11455-Up) : Lubricating Oil System : Lubricating Oil Filter And Piping
| 01***16 | Bolt,(For Slag Handling) | 3 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***60 | Bolt, Mount Tube To Switch Pump | 5 |
Komatsu : S6d140-1g(S/N 11455-Up) : Lubricating Oil System : Lubricating Oil Pump And Suction Pipe(#11455-12394)
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
Komatsu : S6d140-1g(S/N 11455-Up) : Lubricating Oil System : Lubricating Oil Pump And Suction Pipe(#12395-)
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
Komatsu : S6d140-1g(S/N 11455-Up) : Lubricating Oil System : Turbocharger Lubricating Oil Piping
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***16 | Washer,Radio Controlled Slag Handling | 1 |
Tool And Kit
Komatsu : S6d140-1g(S/N 11455-Up) : Tool And Kit : Gasket Kit
| 02***37 | O-Ring,(For Pc750?1800) (A5010) | 2 |
| 02***75 | O-Ring,(For Japan) (K1) | 4 |
| 07***06 | O-Ring,Corrosion Resistor | 1 |
S6D140-1G(S/N 11455-UP) serial number reference
The engine serial number plate is located on the left side of the engine block, near the injection pump or on a metal plate affixed to the valve cover. The prefix 'S6D140-1G' is the engine model code, not a machine PIN prefix; the machine's PIN (17-character ISO code) or model+serial (e.g., WA500-1L #11455) is found on the chassis or cab plate. To identify the correct parts, match the engine serial number (starting from 11455) with the S6D140-1G parts catalog, as engine revisions within this range may require different gaskets, injectors, or turbochargers.
| Prefix | Identifies | Notes |
|---|---|---|
| S6D140-1G | Engine Model | Identifies the S6D140-1G engine family. Serial range 11455-UP is explicitly listed in the Komatsu S6D140-1G Parts Catalog (published references) and associated service manuals for this engine series. The engine is a 6-cylinder, turbocharged, water-cooled diesel with a displacement of approximately 14.0 liters (854 cubic inches). It is used in various Komatsu heavy equipment models, including the WA500-1L wheel loader and D155AX-5 dozer (which may use the SA6D140E-2 variant, but the S6D140-1G is the specific industrial/export engine code for the 11455-UP range). The '1G' suffix typically denotes a specific emissions or configuration variant within the 6D140 series, often associated with Tier 2/Stage II or early Tier 3/Stage IIIA compliance depending on the exact build year and region. Verify with your dealer for the exact emissions tier and application year, as the S6D140-1G is primarily an industrial engine code rather than a machine model prefix. |
Frequently asked questions
What type of engine is the Komatsu S6D140-1G?
It is a six-cylinder, turbocharged, and aftercooled diesel engine with a 14.0-liter (854 cubic inches) displacement.
What is the operating weight of machines powered by this engine?
Operating weight varies by configuration and series, typically ranging from 9,182 to 87,083 lb (4,165 to 39,475 kg) depending on the specific machine model and attachments.
What replaced the Komatsu S6D140-1G engine?
The S6D140-1G is part of the ongoing S6D140 series lineage. Successor variants include updated emissions-compliant versions like the S6D140E-2 series, which incorporate advanced aftertreatment systems for Tier 4 Final/Stage V compliance.
What S6D140-1G(S/N 11455-UP) owners discuss
What is the displacement and cylinder configuration of the Komatsu S6D140-1G engine?
What are the common hydraulic behaviors and failure patterns associated with Komatsu excavators using this engine series?
What are typical undercarriage and wear patterns for machines equipped with this engine?
What electrical or sensor issues are commonly reported by owners?
What engine quirks or performance issues are discussed in the community?
What fluids and specifications are recommended for this engine series?
What should be checked when buying a used machine with the S6D140-1G engine?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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