Komatsuengine(no series)
Komatsu SA6D140-1K(S/N 11397-UP (FRONT ENGINE))
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu SA6D140-1K is a six-cylinder, in-line diesel engine manufactured since 2017, featuring a 15.2-liter displacement and a 140mm bore. It delivers a power rating between 186 and 202 kW (249 to 270 horsepower). This engine powers heavy earthmoving equipment, including the PC1600-1 excavator and D155AX-5 bulldozer, with operating weights ranging from 9,182 to 87,083 lb across the broader machine class. It succeeded earlier SA6D140 variants and serves as a core powertrain component for Komatsu's mid-to-large construction fleet.
Across generations, the SA6D140-1K incorporates Tier 4 Final emissions technology, requiring DEF and advanced aftertreatment compared to its Stage IIIa/Tier 3 predecessors. The machine remains critical in the used and parts market due to its widespread installation in high-hour PC1600 and D155 series units. Its modular design and established KOWA fluid analysis support make it a staple for fleet maintenance, with the S/N 11397-UP range representing a specific production configuration requiring precise catalog matching.
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 SA6D140-1K(S/N 11397-UP (FRONT ENGINE)) specifications
Engine
| Model | SA6D140-1K |
| Series | 6D140-1 Series |
| Displacement | 15.2 L (928.3 cu in) |
| Cylinders | 6 |
| Bore | 140 mm (5.51 in) |
| 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 SA6D140-1K(S/N 11397-UP (FRONT ENGINE)) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the SA6D140-1K(S/N 11397-UP (FRONT ENGINE)) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu Oil Wear Analysis (KOWA) at every major service interval to monitor engine wear metals, hydraulic particle counts, and coolant SCA concentration. The SA6D140-1K relies on Komatsu Genuine Lubricants to maintain viscosity and oxidation resistance. Track DEF levels daily to ensure SCR system efficiency. Analyze fuel dilution and soot levels in the engine oil to predict injector or piston ring wear before failure occurs. Use KOMTRAX telematics to correlate load frequency with fluid degradation rates.
Corrective & Common Repairs
Address recurring SA6D140-1K issues by inspecting the turbocharger and exhaust system for carbon buildup. Replace fuel filters and water separators promptly to protect the high-pressure injection pump. Check hydraulic return filters for contamination that indicates pump or valve wear. Monitor coolant temperature sensors for voltage faults that trigger overheating warnings. Inspect all hydraulic hoses for cracks or leaks during daily checks to prevent fluid loss and component damage.
Overhaul & Rebuild Points
Plan the SA6D140-1K overhaul based on KOWA trends and compression test results. Key rebuild components include cylinder liners, pistons, piston pins, and the crankshaft. Replace the complete gasket set during disassembly. Inspect the fuel injection pump calibration data and turbocharger bearings for wear. Verify valve clearances and inspect the cylinder block for cracks. Use genuine Komatsu overhaul kits to ensure proper tolerances and restore factory performance specifications.
Seasonal & Environment Servicing
Adjust maintenance for the SA6D140-1K based on operating conditions. In dusty environments, clean the air filter more frequently and inspect the intake system for debris. In cold climates, verify coolant glycol content and use appropriate viscosity engine oil. Drain the fuel water separator daily to prevent icing. Inspect the radiator and oil cooler fins for debris buildup that restricts airflow. Ensure the DEF tank is protected from freezing and contamination in winter operations.
SA6D140-1K(S/N 11397-UP (FRONT ENGINE)) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 600-311-7131 | Cartridge,Fuel Filter | Fuel system service | Check fitment → |
| 600-311-7132 | Cartridge,Fuel Filter | Fuel system service | Check fitment → |
| 6210-71-6201 | 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 → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
SA6D140-1K(S/N 11397-UP (FRONT ENGINE)) 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 voltage at the pin connector |
| CA111 | Internal engine controller fault | ECM internal abnormality | Replace or reprogram the ECM |
| 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 |
| AA10NX | Air cleaner clogging | Blocked air filter element | Replace the air filter |
| CA122 | Intake air pressure high voltage | Sensor malfunction or wiring issue | 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 |
| CA441 | Battery voltage too low | Weak battery or alternator failure | Replace the alternator or battery; check the voltage regulator |
| CA442 | Battery voltage too high | Alternator overcharging or regulator failure | 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 high voltage | Sensor malfunction | Replace or test the IAT sensor |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
SA6D140-1K(S/N 11397-UP (FRONT ENGINE)) attachments & work tools
Bulldozer Attachments
The SA6D140-1K engine powers the D155AX-5 bulldozer series. Factory configurations include standard dozer blades and ripper assemblies designed for the machine's weight class. Guarding options and mounting systems are specific to the D155AX-5 chassis and are not interchangeable with other dozer models.
Excavator Attachments
This engine is used in the PC1600-1 and PC1600SP-1 large hydraulic excavators. Work tools include standard bucket families and specialized digging attachments for mining and heavy excavation. Coupler systems and hydraulic arrangements are integrated into the excavator's boom and arm structure.
Wheel Loader Attachments
The WA500-1L wheel loader utilizes the SA6D140-1K engine. Typical work tools include standard loader buckets and material handling forks. Hydraulic kit requirements and mounting systems are specific to the WA500-1L loader frame and are not compatible with other WA series loaders.
Mining Truck Attachments
The HM350-1L mining truck uses the SA6D140-1K engine. The primary attachment is the dump body, configured for high-capacity haulage. No additional work tools are offered for this model; the truck is configured exclusively for material transport.
Pipelayer Attachments
The D355C-3 pipelayer uses the SA6D140-1K engine. Work tools include pipe-laying arms and stabilizer assemblies for pipeline construction. Configurations are specific to the pipelayer chassis and are not compatible with other Komatsu equipment types.
All SA6D140-1K(S/N 11397-UP (FRONT ENGINE)) assemblies by section
Every catalogued assembly group for the Komatsu SA6D140-1K(S/N 11397-UP (FRONT ENGINE)). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Accessory
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Accessory : Air Compressor
| 62***21 | Air Compressor Ass'Y | 1 |
| DK***20 | Unloader Valve A | 1 |
| DK***00 | Seat,Intake Valve | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Accessory : Air Compressor And Piping(#11397-14616)
| 01***35 | Bolt, Mount Bracket To Floor | 1 |
| 01***12 | Nut | 1 |
| 01***60 | Flat Washer - M20 (Hardened) | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Accessory : Air Compressor And Piping(#14617-17629)
| 01***35 | Bolt, Mount Bracket To Floor | 1 |
| 01***12 | Nut | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 6 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Accessory : Air Compressor And Piping(#17630-)
| 01***35 | Bolt, Mount Bracket To Floor | 1 |
| 01***30 | Bolt | 3 |
| 01***12 | Nut | 1 |
Cooling System
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cooling System : Cooling Fan
| 60***80 | Fan,Cooling | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cooling System : Corrosion Resistor And Piping(#11397-11982)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 2 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cooling System : Corrosion Resistor And Piping(#11983-17629)
| 02***25 | Bolt,(Europe Spec.) | 4 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 7 |
| 07***14 | Screw, Banjo Connector (M10) | 2 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cooling System : Corrosion Resistor And Piping(#17630-)
| 02***25 | Bolt,(Cold Weather Spec.) | 4 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 7 |
| 07***14 | Screw, Banjo Connector (M10) | 2 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cooling System : Tension Pulley And Mounting
| 01***16 | Bolt,(For Slag Handling) | 2 |
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cooling System : Water Pump And Mounting
| 01***90 | Bolt, Fan Mounting | 3 |
| 01***95 | Bolt,(For 2nd Travel Speed) (Op) | 3 |
| 01***65 | Screw | 5 |
Cylinder Block
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Block : Camshaft
| 04***25 | Key, Plain Woodruff | 1 |
| 04***12 | Ring, Retaining | 24 |
| 61***20 | Ball | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Block : Crankshaft(#11397-17791)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 6 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Block : Crankshaft(#17792-)
| 01***30 | Bolt,(Not Used With Emergency Str.) | 6 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 6 |
| 04***24 | Pin,Dowel (For No.3 Housing) | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Block : Cylinder Block
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***25 | Screw | 6 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Block : Cylinder Block Cover(#11397-11982)
| 01***16 | Bolt,(Sandy And Dusty Spec.) | 1 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
| 01***60 | Bolt, Mount Tube To Switch Pump | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Block : Cylinder Block Cover(#11983-)
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 5 |
| 01***60 | Bolt, Mount Tube To Switch Pump | 1 |
| 01***70 | Bolt, Mount Bracket And Oil Inlet Tube, Bolt | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Block : Flywheel And Flywheel Housing(#11397-11982)
| 01***45 | Bolt,(For Slag Handling) | 10 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Block : Flywheel And Flywheel Housing(#11983-)
| 01***45 | Bolt,(For Slag Handling) | 8 |
| 01***60 | Bolt, Hanger Bearing Mounting | 2 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Block : Front Cover And Front Bracket
| 01***10 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***16 | Bolt, Mount Washer Tank To Bracket, Bolt | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : 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 : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Block : Oil Pan(#11397-11982)
| 01***30 | Bolt,(For France Noise Suppression) | 2 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 36 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Block : Oil Pan(#11983-17791)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 2 |
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 3 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Block : Oil Pan(#17792-)
| 01***35 | Bolt, Mounting - Flywheel Housing End | 2 |
| 01***12 | Bolt, Bolt,(No Need To Quick Shift) | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 40 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : 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 : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Air Cleaner And Mounting(#11397-17629)
| 01***40 | Bolt,(Dust And Dirt Protection) | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 3 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Air Cleaner And Mounting(#17630-)
| 01***40 | Bolt,(Dust And Dirt Protection) | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 3 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Air Intake Manifold And After Cooler(#11397-17629)
| 01***00 | Bolt, Mount Back-Up Alarm | 12 |
| 01***55 | Bolt | 12 |
| 01***90 | Screw | 22 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Air Intake Manifold And After Cooler(#17630-)
| 01***00 | Bolt, Mount Back-Up Alarm | 12 |
| 01***55 | Bolt | 12 |
| 01***95 | Bolt | 20 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Cylinder Head(#11397-17234)
| 04***20 | Pin,Dowel (Welded) | 2 |
| 07***25 | O-Ring,Lubrication Valve | 1 |
| 07***08 | Plug (Kit) | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Cylinder Head(#17235-17629)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 02***04 | Plug, Pipe | 6 |
| 04***20 | Pin,Dowel (Welded) | 2 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Cylinder Head(#17630-)
| 01***20 | Bolt (M10-1.75x120) | 6 |
| 04***20 | Pin,Dowel (Welded) | 2 |
| 07***25 | O-Ring,Lubrication Valve | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Exhaust Manifold And Turbocharger
| 01***45 | Bolt,(For Suction? Reversible Fan) | 3 |
| 01***50 | Bolt | 1 |
| 01***55 | Screw | 2 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Heat Shield(#17630-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 6 |
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 9 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 11 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Muffler(#11397-11982)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
| 01***50 | Bolt | 2 |
| 01***55 | Bolt,(For Suction? Reversible Fan) | 4 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Muffler(#11983-17629)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
| 01***50 | Bolt | 2 |
| 01***55 | Bolt,(For Suction? Reversible Fan) | 4 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Muffler(#17630-)
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
| 01***40 | Bolt,(Dust And Dirt Protection) | 2 |
| 01***55 | Bolt,(For Suction? Reversible Fan) | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Rocker Arm And Housing(#11397-17234)
| 01***08 | Nut,R.H. Thread | 12 |
| 01***16 | Washer,(For Shipping Parts) | 18 |
| 01***23 | Washer,(For Chinese) | 6 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Rocker Arm And Housing(#17235-17629)
| 01***20 | Bolt | 1 |
| 01***08 | Nut,R.H. Thread | 12 |
| 01***16 | Washer,Radio Controlled Slag Handling | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Rocker Arm And Housing(#17630-)
| 01***20 | Bolt | 1 |
| 01***90 | Bolt,(For No?1 And No?3 Housing) | 1 |
| 01***80 | Bolt (M12-2.00x80) | 6 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Rocker Arm Housing Cover(#11397-17629)
| 01***65 | Bolt,R.H | 18 |
| 62***10 | Cover,Rocker Arm Housing | 6 |
| 62***20 | Washer | 18 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Rocker Arm Housing Cover(#17630-)
| 01***55 | Screw | 18 |
| 62***11 | Cover,Rocker Arm Housing | 6 |
| 62***20 | Gasket, Rocker Lever Housing | 6 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Turbocharger(#11397-17629)
| 01***16 | Bolt,(For Slag Handling) | 4 |
| 01***16 | Bolt | 8 |
| 01***16 | Bolt | 8 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Turbocharger(#17630-)
| 01***16 | Bolt,(For Slag Handling) | 4 |
| 01***16 | Bolt | 8 |
| 04***08 | Pin, Dowel | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Cylinder Head : Water Piping
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Electrical System
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Electrical System : Alternator (50a)
| 60***21 | Alternator A. (50a),(With Hardening Pulley) | 1 |
| SD***X0 | Coil Assembly | 1 |
| SD***X0 | Washer | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Electrical System : Alternator (75a)
| 60***30 | Alternator A. (75a) | 1 |
| SD***X0 | Coil Assembly | 1 |
| SD***X0 | Washer | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Electrical System : Alternator And Mounting (50a)
| 01***20 | Bolt,(With Auto Emergency Steering) | 3 |
| 01***00 | Bolt, Mount Back-Up Alarm | 1 |
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Electrical System : Alternator And Mounting (75a)
| 01***20 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
| 01***00 | Bolt, Mount Back-Up Alarm | 1 |
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Electrical System : Starting Motor (7.5kw)
| 60***30 | Starting Motor Ass'Y,(7.5kw) | 1 |
| KD***20 | Magnetic Switch Assembly | 1 |
| KD***40 | Spring,Spring | 4 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : 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 | Bolt - Starting Motor Ground Cable | 1 |
Fuel System
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Filter And Piping(#11397-17629)
| 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 : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Filter And Piping(#17630-)
| 01***25 | Bolt,(For Automatic) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump (Coupling)(#11397-15282)
| ND***10 | Nut | 1 |
| ND***80 | Bolt | 2 |
| ND***61 | Bolt | 6 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump (Coupling)(#15283-)
| ND***10 | Nut | 1 |
| ND***80 | Bolt | 2 |
| ND***61 | Bolt | 6 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump (Feed Pump)(#11397-15282)
| ND***40 | Washer? 1mm,Plate | 1 |
| ND***10 | Spring,Tappet | 1 |
| ND***70 | Washer,Union | 4 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump (Feed Pump)(#15283-)
| ND***40 | Washer? 1mm,Plate | 1 |
| ND***10 | Spring,Tappet | 1 |
| ND***70 | Washer,Union | 4 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#11397-15282)
| ND***40 | Plate,Thrust | 1 |
| ND***60 | Shackle Ass'Y | 1 |
| ND***71 | Lever Ass'Y,Control | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#15283-)
| ND***40 | Plate,Thrust | 1 |
| ND***60 | Shackle Ass'Y | 1 |
| ND***71 | Lever Ass'Y,Control | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#11397-15282)
| ND***80 | Pin,Stop | 1 |
| ND***20 | Washer? 1.0mm,Cover Plate | 2 |
| ND***00 | Screw,Adjusting | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#15283-)
| ND***80 | Pin,Stop | 1 |
| ND***20 | Washer? 1.0mm,Cover Plate | 2 |
| ND***00 | Screw,Adjusting | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump (Pump) (1/2)(#11397-15282)
| 62***20 | Injection Pump A | 1 |
| 62***21 | Injection Pump A | 1 |
| ND***81 | Screw | 2 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump (Pump) (1/2)(#15283-)
| 62***22 | Injection Pump A | 1 |
| 62***23 | Injection Pump A | 1 |
| 62***24 | Injection Pump A | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump (Pump) (2/2)(#11397-15282)
| ND***40 | Washer | 12 |
| ND***30 | Spring,Plunger | 6 |
| ND***10 | Shim? 1.55mm | 0 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump (Pump) (2/2)(#15283-)
| ND***40 | Washer | 12 |
| ND***30 | Spring,Plunger | 6 |
| ND***10 | Shim? 1.55mm | 0 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump And Piping(#11397-17629)
| 01***16 | Bolt,(For Slag Handling) | 3 |
| 01***25 | Bolt,(For Automatic) | 4 |
| 01***35 | Bolt | 4 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump And Piping(#17630-)
| 01***16 | Bolt,(For Slag Handling) | 3 |
| 01***25 | Bolt,(For Automatic) | 4 |
| 01***35 | Bolt | 4 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump Linkage(#11397-15282)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***00 | Bolt (M10-1.50x100) | 3 |
| 01***10 | Bolt | 2 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Injection Pump Linkage(#15283-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 5 |
| 01***14 | Screw | 2 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Nozzle And Spill Pipe(#11397-17629)
| 01***20 | Bolt, Mount Main Relief Valve | 6 |
| 01***10 | Nut,(Service Only) | 6 |
| 07***21 | O-Ring,Oil Cooler Pipe | 12 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Fuel System : Fuel Nozzle And Spill Pipe(#17630-)
| 01***20 | Bolt, Mount Main Relief Valve | 6 |
| 07***21 | O-Ring,Oil Cooler Pipe | 12 |
| 07***12 | Gasket,Mechanical Pump Piping | 12 |
Lubricating Oil System
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Lubricating Oil System : Lubricating Oil Cooler
| 01***25 | Bolt,Without Revolution Sensor | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 14 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 13 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Lubricating Oil System : Lubricating Oil Filter And Piping(#11397-17629)
| 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 : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Lubricating Oil System : Lubricating Oil Filter(#17630-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 19 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 8 |
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 4 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Lubricating Oil System : Lubricating Oil Pump And Suction Pipe(#11397-11982)
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Lubricating Oil System : Lubricating Oil Pump And Suction Pipe(#11983-)
| 01***25 | Bolt,(Without Auto Priming System) | 4 |
| 01***20 | Bolt,(Large Capacity Type) (Std) | 1 |
| 01***25 | Bolt,(Sandy? Dusty Terrain Spec.) | 3 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Lubricating Oil System : Oil Adapter(#17630-)
| 01***16 | Bolt,(For Slag Handling) | 3 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***30 | Bolt,(For Quick Shift) (Mitsubishi) | 2 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Lubricating Oil System : Turbocharger Lubricating Oil Piping(#11397-17629)
| 01***20 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Lubricating Oil System : Turbocharger Lubricating Oil Piping(#17630-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***35 | Bolt,(For Quick Shift) (Mitsubishi) | 3 |
| 01***32 | Washer, (Without Emergency Steering) | 1 |
Tool And Kit
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Tool And Kit : Air Compressor Gasket Kit
| 07***25 | Gasket (Kit) | 1 |
| 07***40 | Gasket (K8) | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 4 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Tool And Kit : Cylinder Block Gasket Kit
| 06***04 | Seal,Bearing (Kit) | 2 |
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 07***65 | O-Ring,Injection Pump Case | 1 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Tool And Kit : Cylinder Head Gasket Kit
| 02***75 | O-Ring,(For Japan) (K1) | 4 |
| 02***81 | O-Ring,Air Connector | 2 |
| 07***25 | O-Ring,Corrosion Resistor | 4 |
Komatsu : Sa6d140-1k(S/N 11397-Up (Front Engine)) : Tool And Kit : Water Pump Gasket Kit
| 02***37 | O-Ring,(For Pc750?1800) (A5010) | 2 |
| 07***55 | O-Ring,Front Accessory Drive | 2 |
| 07***70 | O-Ring,(For Intake Air Cover) | 1 |
SA6D140-1K(S/N 11397-UP (FRONT ENGINE)) serial number reference
The engine identification plate is located on the left side of the engine block or on a metal plate affixed near the valve cover. Read the three-character prefix (e.g., SA6) to identify the engine family, followed by the model code (D140) and suffix (-1K) to determine the specific configuration and serial range applicability.
| Prefix | Identifies | Notes |
|---|---|---|
| SA6D140-1K | Front Engine | S/N 11397-UP. Identified in published references catalog listings and DK Engine Parts equipment guide as the specific engine variant for this serial range. The 'K' suffix denotes the specific configuration within the SA6D140-1 series. |
| SA6D140-1L | Front Engine | S/N 11397-UP. Listed alongside the -1K variant in the DK Engine Parts equipment guide. Variations in configuration or series may apply between -1K and -1L. |
| SA6D140-1N | Front Engine | S/N 17739-UP. Listed in the DK Engine Parts equipment guide. Serial break occurs at 17739. |
| SA6D140-1P | Front Engine | S/N 17739-UP. Listed in the DK Engine Parts equipment guide. Serial break occurs at 17739. |
| SA6D140-2A | Front Engine | S/N 23933-UP. Listed in the DK Engine Parts equipment guide. Serial break occurs at 23933. |
| SA6D140-2B | Front Engine | S/N 23933-UP. Listed in the DK Engine Parts equipment guide. Serial break occurs at 23933. |
Frequently asked questions
What is the engine type?
The Komatsu SA6D140-1K is a six-cylinder, in-line diesel engine with a 15.2-liter displacement and a 140mm bore.
What is the operating weight?
Operating weight varies by configuration and series, ranging from 9,182 to 87,083 lb across the broader machine class.
What replaced it?
The SA6D140-1K succeeded earlier SA6D140 variants and is part of the ongoing 6D140 engine family lineage.
What SA6D140-1K(S/N 11397-UP (FRONT ENGINE)) owners discuss
What are the known powertrain and hydraulic behaviors associated with the Komatsu SA6D140-1K engine series?
The SA6D140-1K is a six-cylinder, in-line diesel engine with a displacement of 15.2 liters and a bore of 140 mm. It typically produces between 186 to 202 kW (approximately 249 to 270 horsepower). The engine is known for strong hydraulic system integration and fuel efficiency. However, community consensus notes that Komatsu hydraulic pumps and valves are sensitive to contamination; if a hydraulic pump fails, the engine often suffers secondary damage from debris ingress. Early dash-6 machines in this lineage were reported to have specific valve problems, particularly on PC150 and PC120 models, leading to poor resale value if not addressed. The line is generally designed to wear out complete machines simultaneously rather than individual components failing in isolation.
What undercarriage or wear patterns are typical for machines powered by this engine?
Machines equipped with the SA6D140-1K, such as the PC1600-1 (serial 10063-Up) and PC1800-6 (serial 10001-Up), are heavy-duty excavators subject to continuous load and dust exposure. Typical wear patterns include undercarriage component fatigue and track tension issues. Owners report that machines often drift or pull to one side due to uneven track tension, mud packing, or roller wear rather than immediate travel motor failure. Testing the symptom in both forward and reverse directions is critical to distinguish between hydraulic flow issues and mechanical resistance. Final drives are known to produce grinding noises when internal gears or bearings wear, requiring specialized tools for inspection.
What are the common engine quirks per the SA6D140-1K series?
The SA6D140-1K series (applicable to S6D140-1, SA6D140-1, and SAA6D140-1 models) is robust but requires strict adherence to maintenance schedules. Common quirks include sensitivity to fuel quality and air intake restrictions. Loss of power under heavy digging load is frequently caused by clogged air filters, fuel filters, or restricted fuel tank venting rather than internal engine failure. Overheating during heavy excavation is often due to material packed between the radiator, hydraulic oil cooler, and charge-air cooler, rather than coolant loss. The engine holds good oil pressure when in serviceable condition, with typical readings around 40 lbs (276 kPa) at operating temperature.
What are the common electrical and sensor issues reported by operators?
Komatsu excavators rely heavily on electronic control systems; a single faulty sensor or unstable power supply can trigger multiple warning signals. Owners frequently report intermittent starting, dashboard failures, and machines that randomly shut down. These symptoms often stem from corroded engine or chassis grounds, loose main starter cables, or failing starter relays. A battery may show acceptable voltage until the starter is loaded; if the display dims heavily during cranking, a load and voltage-drop test is required before replacing the starter. Multiple fault codes often indicate a common ground issue or connector corrosion rather than individual component failure.
What specific fluids and lubricants should be used for the SA6D140-1K engine and its associated systems?
Komatsu specifies the use of genuine Komatsu fluids to ensure optimal performance and warranty compliance. For the engine, use Komatsu EO (Engine Oil) or equivalent high-quality diesel engine oil meeting Komatsu specifications. For the hydraulic system, use Komatsu TO (Transmission and Hydraulic Oil) or HO (Hydraulic Oil) depending on the specific application and temperature range. Coolant should be Komatsu Super-coolant AF-NAC. Axle and powertrain oils must also be Komatsu-approved formulations. Using non-specified fluids can lead to premature wear of seals and hydraulic components.
What is the most critical thing to check when buying a used machine with the SA6D140-1K engine (S/N 11397-Up)?
When buying a used machine with the SA6D140-1K engine (serial 11397-Up), verify the exact engine model plate and serial range, as this serial prefix corresponds to specific configurations like the PC1600-1. Check for signs of hydraulic contamination, such as milky oil or debris in the hydraulic tank, which indicates a pump failure that may have damaged the engine. Inspect the undercarriage for uneven wear and track tension issues. Test all hydraulic functions cold and hot to identify internal leakage that worsens with temperature. Verify the condition of the cooling package by ensuring no material is packed between the heat exchangers. Finally, check for intermittent electrical faults by monitoring the dashboard for random shutdowns or fault codes during operation.
What safety-critical fix is associated with the cooling system of this engine?
If coolant is repeatedly expelled or the cooling system becomes highly pressurized shortly after a cold start, this indicates a deeper engine issue such as a blown head gasket or cracked block. Have your dealer verify the cooling system integrity and engine block condition immediately to prevent catastrophic failure.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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