Komatsuengine(no series)
Komatsu SA6D140-2D-G(S/N 22537-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu SA6D140-2D-G is a six-cylinder, turbocharged, aftercooled diesel engine belonging to the 6D140 series, designed for heavy-duty construction and mining applications. It powers large crawler dozers such as the D155A-3, D155AX-3, and D155AX-5, as well as heavy excavators like the PC1600SP-1. The engine features a 14.0-liter displacement and delivers power ratings typically between 186 kW and 202 kW (249–270 hp), depending on the specific machine configuration and emissions tier. Production years for this engine family span from the mid-1990s through the 2000s, serving as a workhorse for Komatsu's largest earthmoving equipment before being succeeded by newer Tier-compliant variants in the 6D140E and SAA6D140E lines.
Across the 6D140 series generations, primary changes involved updates to fuel injection systems, emissions compliance packages, and turbocharging efficiency to meet evolving environmental standards while maintaining robust torque characteristics. The SA6D140-2D-G remains significant in the used and parts market due to its widespread installation in high-hour D155 dozers and PC1600 excavators, which are now entering major overhaul cycles. Its modular design and commonality with other 6D140 variants ensure a steady supply of aftermarket components, making it a critical reference point for fleet managers managing aging heavy equipment 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 SA6D140-2D-G(S/N 22537-UP) specifications
Engine
| Model | SA6D140-2D-G |
| Series | SA6D140-2 Series |
| Displacement | 15.2 L (928 cu in) |
| Cylinders | 6 |
| Bore | 140 mm (5.51 in) |
| Configuration | Turbocharged, aftercooled diesel |
| Gross Power | Not documented for this exact serial range — verify with your dealer |
| 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 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 SA6D140-2D-G(S/N 22537-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 SA6D140-2D-G(S/N 22537-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize KOWA fluid analysis at every 500-hour interval to monitor engine wear metals (iron, copper, lead, aluminum) and contaminants like silicon (dirt) and sodium (coolant). Track hydraulic oil particle count and viscosity changes to predict pump and valve wear. Monitor coolant pH, SCA concentration, and glycol content to prevent liner cavitation and corrosion. KOMTRAX telematics should be configured to alert on load frequency and fault codes, enabling proactive intervention before catastrophic failure occurs in the SA6D140-2D-G powertrain.
Corrective & Common Repairs
Address common SA6D140-2D-G issues by inspecting the turbocharger for shaft play and seal leaks during 1,000-hour services. Check fuel injection pump calibration data and injector nozzle spray patterns to maintain combustion efficiency. Inspect the exhaust brake system for wear and proper operation. Verify belt tension and hose clamp integrity to prevent coolant or oil leaks. Replace worn pins and bushings in the undercarriage and linkage to maintain alignment and reduce stress on the engine mounts and chassis components.
Overhaul & Rebuild Points
Plan major overhauls for the SA6D140-2D-G around 10,000 to 15,000 hours, depending on duty cycle and maintenance history. Key rebuild points include cylinder head gasket replacement, valve guide and seat inspection, and piston ring replacement. Inspect the crankshaft for journal wear and bearing clearance. Evaluate the cylinder block for liner wear and coolant passage integrity. Use genuine Komatsu overhaul kits to ensure proper clearances and sealing for the 14.0-liter displacement engine.
Seasonal & Environment Servicing
In cold climates, verify the cooling system's freeze protection and use appropriate grade Komatsu Super-coolant AF-NAC to prevent freezing and overheating. In dusty environments, inspect the air filter restriction indicator more frequently and clean the radiator and oil cooler fins daily to prevent overheating. In high-humidity or coastal areas, check for salt corrosion on electrical connections and exhaust components. Ensure the fuel water separator is drained daily to prevent microbial growth and fuel system damage in varying temperatures.
SA6D140-2D-G(S/N 22537-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 600-311-7132 | Cartridge,Fuel Filter | Fuel system service | Check fitment → |
| 6210-71-6202 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| 09637-90263 | Plate? Instruction,Air Cleaner Element Mainte | Air intake service | Check fitment → |
| 6162-53-5430 | Packing,Oil Filter And Piping | Lubrication service | Check fitment → |
| 6162-53-5450 | Packing,Oil Filter And Piping | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
SA6D140-2D-G(S/N 22537-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 failure | 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 |
| 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 | Alternator failure, battery degradation, or voltage regulator issue | Replace the alternator or battery; check the voltage regulator |
| CA442 | Battery voltage too high | Alternator overcharging or voltage regulator failure | Replace the alternator or battery; check the voltage regulator |
| 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 |
| CA153 | Intake air temperature sensor error (high) | Sensor failure | Replace or test the IAT sensor |
| CA154 | Intake air temperature sensor error (low) | Sensor failure | 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.
SA6D140-2D-G(S/N 22537-UP) attachments & work tools
Excavator Attachments
The SA6D140-2D-G engine powers the PC650-3 and PC710-5 crawler excavators. Factory specifications for these models list bucket capacities ranging from 2.8 to 6.1 cubic meters. Hydraulic tool configurations vary by specific machine serial number and series.
Dozer Attachments
This engine is installed in the D355C-3 bulldozer and the D155AX-5 dozer. Blade capacities for these machines range from 2.5 cubic yards to over 60 cubic yards depending on the specific model configuration. Pushing performance relies on the hydrostatic or torque converter transmission systems.
Wheel Loader Attachments
The WA500-1L wheel loader utilizes the SA6D140-2D-G engine. Standard bucket sizes for this class are determined by the machine's rated payload and hydraulic flow rates. Tool compatibility includes standard earthmoving buckets and specialized material handling forks.
Generator Sets
The DCA-400SSK generator set is a primary application for this engine model. Power output is rated at 405 kW at 1800 rpm. The configuration includes specific guarding and exhaust arrangements for stationary industrial use.
All SA6D140-2D-G(S/N 22537-UP) assemblies by section
Every catalogued assembly group for the Komatsu SA6D140-2D-G(S/N 22537-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Engine
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : After Cooler Water Piping(#29271-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***40 | Bolt (Op) | 2 |
| 01***65 | Bolt - Return Line And Suction Linehose Clamps | 2 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : After Cooler Water Piping(#30037-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 4 |
| 01***40 | Bolt (Op) | 2 |
| 01***65 | Bolt - Return Line And Suction Linehose Clamps | 2 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Air Cleaner Hood(#29271-)
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Air Cleaner Mounting(#29271-)
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 4 |
| 01***40 | Bolt (Op) | 2 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Air Intake Manifold And After Cooler(#29271-)
| 01***00 | Bolt,(For Front Brake Release) | 11 |
| 01***55 | Bolt,(With Corrosion Resistor) | 3 |
| 01***60 | Bolt | 7 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Air Intake Manifold And After Cooler(#30037-)
| 01***00 | Bolt,(For Front Brake Release) | 11 |
| 01***55 | Bolt,(With Corrosion Resistor) | 3 |
| 01***60 | Bolt | 7 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Air Vent(#29271-)
| 01***20 | Bolt | 1 |
| 01***16 | Washer,Radio Controlled Slag Handling | 1 |
| 07***15 | Gasket,(Hd325?Pc750?800?1800) (A5010) | 14 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Alternator (35a) (Inner Parts)
| 60***10 | Alternator A. (35a) | 1 |
| 60***11 | Alternator A. (35a) | 1 |
| KD***50 | Bracket,Rear | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Alternator (35a) (With Hardening Pulley) (Inner Parts)(#25887-)
| 60***10 | Alternator A. (35a) | 1 |
| KD***70 | Bushing,Insulate | 1 |
| KD***40 | Bushing,Insulate | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Alternator (50a) (With Hardening Pulley) (Inner Parts)(#25887-27970)
| 60***10 | Alternator A. (50a) | 1 |
| SD***X0 | Coil Assembly | 1 |
| SD***X0 | Washer | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Alternator (60a) (Inner Parts)(#26660-)
| 60***10 | Alternator A. (60a) | 1 |
| KD***70 | Bushing,Insulate | 1 |
| KD***40 | Bushing,Insulate | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Alternator (60a) (With Hardening Pulley) (Inner Parts)(#27971-)
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Alternator Mounting (35a)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***60 | Bolt,For Weight Adjusting Bolt | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Alternator Mounting (35a) (With Hardening Pulley)(#25887-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***60 | Bolt,For Weight Adjusting Bolt | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Alternator Mounting (50a) (With Hardening Pulley)(#25887-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***60 | Bolt,For Weight Adjusting Bolt | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Alternator Mounting (60a)(#26660-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 3 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***60 | Bolt,For Weight Adjusting Bolt | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Camfollower Cover
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***30 | Bolt,(With Body Positioner) | 5 |
| 01***65 | Bolt - Return Line And Suction Linehose Clamps | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Camfollower(#26075-)
| 04***12 | Ring, Retaining | 4 |
| 61***30 | Pin,Dowel | 12 |
| 61***20 | Ball | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Camshaft(#26075-)
| 01***20 | Bolt (M12-1.75x20) | 2 |
| 04***25 | Key, Plain Woodruff | 1 |
| 62***12 | Camshaft Assembly | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Caution Plate (Chinese)(#29271-)
| 09***63 | Plate? Instruction,Air Cleaner Element Mainte | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Cooling Fan (Reversible Type)(#29348-)
| 60***20 | Fan,Reversible | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Cooling Fan(#29271-)
| 60***20 | Fan,(High Speed) | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Corrosion Resistor
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Crank Pulley(#25748-)
| 04***24 | Pin,Dowel (For No.3 Housing) | 1 |
| 62***20 | Bolt | 6 |
| 62***30 | Pulley? Hardening | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Crankshaft
| 61***30 | Key Parallel | 1 |
| 62***00 | Bearing Assembly | 1 |
| 62***10 | Main Bearing Assembly | 7 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Cylinder Block (1/2)(#26660-)
| 01***45 | Washer,(Without R.O.P.S.) | 14 |
| 04***14 | Pin, Dowel | 2 |
| 04***20 | Pin,Dowel (Welded) | 12 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Cylinder Block (2/2)(#26660-)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***25 | Screw | 6 |
| 01***16 | Washer,(With Water Separator) | 6 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Cylinder Block Gasket Kit(#29271-)
| 01***12 | Washer,(F2320-63a2 -13 ) | 2 |
| 07***14 | O-Ring,(F4350-63a1a-2 ) | 1 |
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Cylinder Block Related Parts(#25749-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 6 |
| 01***20 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Cylinder Head
| 01***20 | Bolt (M10-1.75x120) | 6 |
| 04***20 | Pin,Dowel (Welded) | 2 |
| 07***25 | O-Ring,Lubrication Valve | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Cylinder Head Gasket Kit(#29271-)
| 02***75 | O-Ring,(For Japan) (K1) | 4 |
| 02***81 | O-Ring,Air Connector | 2 |
| 07***15 | O-Ring | 14 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Damper
| 01***30 | Bolt,(Not Used When Towing Winch) | 6 |
| 01***32 | Washer,(Not Used With Emergency Str.) | 6 |
| 62***00 | Damper Ass'Y | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Ejector Piping(#29271-)
| 01***30 | Bolt,(With Body Positioner) | 5 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 6 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Engine Mounting(#29271-)
| 01***45 | Bolt | 8 |
| 01***45 | Washer,(Except Pll) | 8 |
| 04***34 | Pin-Dowel, Pin,Dowel (For Shipping) | 4 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Exhaust Manifold
| 01***55 | Screw | 2 |
| 01***00 | Screw | 22 |
| 07***08 | Plug,(For W/O. Corrosion Resistor) | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Exhaust Pipe(#29271-)
| 62***30 | Pipe,Exhaust | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Fan Belt(#29271-)
| 04***73 | V-Belt Set,Fan Drive | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Flywheel Housing(#29271-)
| 01***45 | Capscrew - M16 | 5 |
| 01***50 | Capscrew | 5 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 6 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Flywheel(#25748-)
| 01***50 | Bolt | 6 |
| 61***90 | Pin,Dowel | 1 |
| 62***00 | Flywheel Ass'Y | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Front Cover And Breather Related Parts(#26075-)
| 01***16 | Bolt - Box Mounting | 2 |
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Front Cover(#25749-)
| 07***16 | Plug, Expansion | 7 |
| 62***70 | Sleeve | 1 |
| 62***10 | Cover,Front | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Front Power Take Off (Without Front Power Take Off)(#29271-)
| 01***20 | Bolt,(For Mono Lever Steering) | 3 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
| 01***15 | Bolt, Fan Mounting | 3 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Fuel Filter
| 01***40 | Screw, Hex Socket | 1 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 2 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Fuel Injection Pump (Coupling) (Inner Parts)(#29271-)
| DK***00 | Coupling | 1 |
| DK***00 | Bolt | 6 |
| DK***00 | Bolt | 2 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Fuel Injection Pump (Feed Pump) (Inner Parts)(#29271-)
| DK***20 | Bolt, Joint | 1 |
| DK***20 | Housing | 1 |
| DK***00 | Valve,Check | 4 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Inner Parts)(#29271-)
| DK***00 | Gasket | 1 |
| DK***20 | Flyweight Ass'Y | 1 |
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Inner Parts)(#29271-)
| DK***80 | Shim? 0.5mm | 0 |
| DK***00 | Washer,Spring | 1 |
| DK***80 | Bolt,Eye | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#29271-)
| 62***80 | Injection Pump Ass'Y | 1 |
| DK***30 | Bearing,Roller | 2 |
| DK***90 | Pump Ass'Y | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#29271-)
| DK***20 | Plunger Ass'Y | 1 |
| DK***20 | Plunger Block A | 6 |
| DK***00 | Shim? 0.875mm | 0 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Fuel Injection Pump Drive(#22653-)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 3 |
| 01***19 | Nut | 1 |
| 01***16 | Washer,(For Shipping) | 3 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Fuel Injection Pump Lubricator
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 2 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 2 |
| 07***10 | Screw, Banjo Connector (M10-1.25x20) | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Fuel Injection Pump Mounting(#29271-)
| 01***90 | Bolt,(For No?1 And No?3 Housing) | 4 |
| 01***16 | Washer,Radio Controlled Slag Handling | 4 |
| 07***10 | Connector, Grease Fitting | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Fuel Injection Pump Piping
| 01***25 | Capscrew | 4 |
| 01***30 | Screw | 4 |
| 01***35 | Bolt | 4 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Fuel Injection Pump Safety Guard(#25887-)
| 01***10 | Bolt,(With Joy Stick Steering) | 4 |
| 07***10 | Connector, At Case | 1 |
| 62***71 | Cover,Safety | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Fuel Return
| 01***20 | Capscrew | 1 |
| 01***16 | Washer,Radio Controlled Slag Handling | 1 |
| 04***10 | Clip,(For Mono Lever Steering) | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Head Cover Mounting(#26084-)
| 01***55 | Screw | 18 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Head Cover(#26084-)
| 62***11 | Cover,Rocker Arm Housing | 6 |
| 62***20 | Gasket, Rocker Lever Housing | 6 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Heat Shield(#22537-29685)
| 01***20 | Bolt,(For Mono Lever Steering) | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Heat Shield(#25748-29874)
| 01***20 | Bolt,(For Mono Lever Steering) | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Heat Shield(#29875-)
| 01***20 | Bolt,(For Mono Lever Steering) | 7 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***90 | Capscrew | 3 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Heater Switch Wiring(#28602-)
| 01***12 | Bolt,(With Speedometer) | 2 |
| 01***16 | Bolt - Starting Motor Ground Cable | 2 |
| 01***60 | Bolt - Upper Cooler Inlet Tubemounting | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Idler Gear(#26526-)
| 01***30 | Bolt - M8 X 30lg | 6 |
| 61***60 | Pin, Dowel | 1 |
| 61***22 | Bolt | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Injection Nozzle(#25748-)
| 01***20 | Capscrew | 6 |
| 07***21 | O-Ring,Oil Cooler Pipe | 6 |
| 07***21 | Seal, O-Ring | 6 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Muffler(#29271-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***95 | Capscrew | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Name Plate And Caution(#29271-)
| 04***50 | Screw | 4 |
| 09***40 | Plate? Name,(Limited Supply) (English) | 1 |
| 60***00 | Plate,(Limited Supply) | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Nozzle Holder (Inner Parts)(#25748-)
| 62***31 | Connector | 1 |
| 62***00 | Nozzle Holder Ass'Y | 6 |
| 62***20 | Nozzle | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Oil Adapter
| 01***16 | Bolt,(For Slag Handling) | 3 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***60 | Bolt,(F4320-52a0 -5- ) | 5 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Oil Cooler(#22653-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***30 | Bolt,(With Body Positioner) | 13 |
| 01***60 | Bolt,(F4320-52a0 -5- ) | 2 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Oil Filter
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***30 | Bolt,(With Body Positioner) | 8 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 4 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Oil Level Gauge
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 1 |
| 01***32 | Washer,(With Auto Emergency Steering) | 2 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Oil Pan And Suction Tube
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 42 |
| 01***30 | Bolt,(With Body Positioner) | 1 |
| 01***08 | Nut, Regular Hexagon (M10-1.50) | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Oil Pump
| 01***25 | Bolt,(Rear Attachment Less) | 4 |
| 01***30 | Bolt,(Not Used When Towing Winch) | 1 |
| 01***40 | Bolt,For Weight Adjusting Bolt | 2 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Piston
| 02***13 | Pin, Dowel | 2 |
| 04***20 | Ring, Retaining | 12 |
| 62***10 | Bolt | 2 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Power Take Off And Lubricator(#29271-)
| 01***20 | Bolt,(For Mono Lever Steering) | 7 |
| 01***30 | Bolt,(With Body Positioner) | 8 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 6 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Rocker Arm And Housing(#26075-)
| 01***80 | Bolt (M12-2.00x80) | 6 |
| 01***80 | Bolt (M10-1.50x80) | 17 |
| 01***20 | Bolt (M12-1.75x120) | 12 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Spare Parts(#29271-)
| 04***73 | V-Belt Set,Fan Drive | 1 |
| 60***31 | Cartridge, Oil Filter | 1 |
| 60***32 | Cartridge,Fuel Filter | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Starting Motor (11kw) (Inner Parts)(#29271-30933)
| 60***30 | Starting Motor Ass'Y,(11kw) | 1 |
| SD***X0 | Pinion Clutch Ass'Y | 1 |
| SD***X0 | Bearing,Ball | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Starting Motor Mounting (11kw)(#29271-)
| 01***30 | Bolt, Tank Mounting | 3 |
| 01***40 | Bolt (Kit) | 3 |
| 61***10 | Cover | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Tension Pulley (With Hardening Pulley)(#29271-)
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***40 | Bolt (Op) | 2 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Thermostat Housing(#29271-)
| 01***50 | Bolt,(Spark Arrester Spec.) | 2 |
| 01***65 | Screw | 5 |
| 01***10 | Bolt | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Turbocharger (Inner Parts)
| 01***16 | Bolt | 4 |
| 01***16 | Bolt | 8 |
| 01***16 | Bolt | 8 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Turbocharger Mounting
| 61***90 | Nut, Mounting | 4 |
| 61***10 | Screw | 4 |
| 62***31 | Gasket, Turbocharger | 1 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Turbocharger Oil Piping
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 3 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Water Pump Gasket Kit(#29271-)
| 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 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Water Pump(#29271-)
| 01***95 | Capscrew | 3 |
| 01***16 | Washer,Radio Controlled Slag Handling | 3 |
| 02***37 | O-Ring,(For Pc750?1800) (A5010) | 2 |
Komatsu : Sa6d140-2d-G(S/N 22537-Up) : Engine : Water Separator
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 3 |
| 01***65 | Bolt | 1 |
SA6D140-2D-G(S/N 22537-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 area. The prefix is the first three characters of the engine model code (e.g., 'SA6' in SA6D140-2D-G), which identifies the engine family (S=Turbocharged, A=Aftercooled, 6=Cylinders, D=Inline). The full engine model and serial number are required to identify the correct parts catalog, as the machine's chassis serial number does not directly decode the engine prefix.
| Prefix | Identifies | Notes |
|---|---|---|
| SA6D140-2D-G | Engine Model | SA6D140-2D-G (S/N 22537-UP). Identified as the specific engine model for this serial range in the published references catalog. The 'G' suffix typically denotes a specific configuration or market variant within the SA6D140-2D family. No other 3-character PIN prefixes are explicitly tied to this exact engine serial range in the provided sources. Verify with dealer for specific machine application (e.g., PC900, PC1250) as the engine is used across multiple Komatsu models. |
Frequently asked questions
What is the engine type and displacement for the Komatsu SA6D140-2D-G?
The Komatsu SA6D140-2D-G is a six-cylinder, in-line, turbocharged, and aftercooled diesel engine with a displacement of approximately 14.0 liters (854 cubic inches).
What is the operating weight range of the machines powered by this engine?
Machines powered by the SA6D140-2D-G, such as the D155A-3 dozer and PC1600SP-1 excavator, typically have operating weights ranging from approximately 150,000 lbs to 180,000 lbs (68,000 kg to 82,000 kg), varying by configuration and attachment.
What engine replaced the SA6D140-2D-G in newer Komatsu models?
The SA6D140-2D-G was succeeded by the SA6D140E-2 and SAA6D140E series engines, which incorporate updated emissions technology and fuel injection systems to meet Tier 4 Final and EU Stage V standards.
What SA6D140-2D-G(S/N 22537-UP) owners discuss
What are the known powertrain and hydraulic behaviors for the Komatsu SA6D140-2D-G engine series?
The SA6D140-2D-G engine is a six-cylinder, turbocharged, aftercooled diesel unit with a displacement of approximately 14.0 liters (854 cubic inches). It is commonly paired with Komatsu hydraulic excavators (such as the PC750-6, PC800-6, and PC1800-6) and bulldozers. Community consensus indicates that Komatsu hydraulic systems are generally smooth and fuel-efficient, but the line is noted for a tendency toward simultaneous wear of major components. If the main hydraulic pump fails, the engine is often not far behind in terms of wear, which significantly impacts resale value. Early dash-6 machines are specifically cited for valve problems, particularly on smaller PC150 and PC120 models, though the 140-series shares the broader platform's hydraulic architecture.
What undercarriage or wear patterns are typical for machines using this engine type?
Machines equipped with the SA6D140-2D-G engine, such as the D155A-3 and D155AX-5 bulldozers or PC-series excavators, are heavy-duty units subject to significant undercarriage stress. Common wear patterns include track-chain elongation, roller failure, and idler wear, particularly in abrasive environments. A frequent diagnostic issue is the machine pulling to one side during travel, which may stem from track tension discrepancies, debris packed into the undercarriage, or hydraulic flow imbalance in the travel motors rather than a simple mechanical track issue. Final drives are also a known wear point; noise often indicates internal gear or bearing failure requiring inspection.
What are the common engine quirks per the SA6D140-2D-G series?
The SA6D140-2D-G engine is robust but sensitive to airflow and fuel delivery restrictions. A primary quirk is power loss under heavy digging load, often caused by clogged air filters, restricted fuel filters, or blocked charge-air hoses rather than internal engine failure. Overheating is another common issue, frequently resulting from material packed between the radiator, hydraulic oil cooler, and charge-air cooler, even if the exterior appears clean. The engine relies on precise fuel injection; injector wear or failing fuel delivery components can lead to increased fuel usage and erratic performance. Cold-starting issues are also reported, often linked to the fuel system or electrical grounds rather than the engine block itself.
What are the common electrical and sensor issues for this engine?
Komatsu excavators and dozers using this engine series rely heavily on electronic control systems. Common electrical issues include intermittent starting, dashboard failures, and random machine shutdowns. These symptoms are often triggered by a single faulty sensor or an unstable power supply, which can cause multiple warning signals to activate simultaneously. Grounding issues at the engine and chassis are frequent culprits for no-crank conditions or erratic sensor readings. Owners are advised to check battery state of charge, terminal integrity, and main starter cable connections before assuming starter or alternator failure.
What should be checked when buying a used machine with the SA6D140-2D-G engine (S/N 22537-UP)?
When evaluating a used machine with this engine, verify the exact serial prefix and dash-number to confirm the specific model (e.g., D155A-3, PC750-6) and its associated hydraulic and electrical configurations. Check for signs of simultaneous hydraulic and engine wear, as Komatsu platforms are known for wearing out major components together. Inspect the cooling package for packed debris between heat exchangers. Test all hydraulic functions both cold and hot to identify internal leakage that worsens with temperature. Verify the integrity of the electrical system, including ground connections and sensor functionality, to rule out intermittent shutdowns. Confirm the history of undercarriage and final drive components, as these are high-wear items. Always consult the official OEM service manual for the specific serial range to verify fluid specifications and maintenance intervals.
What are the recommended fluid specifications for this engine?
Komatsu recommends using Komatsu Genuine fluids for optimal performance and warranty compliance. For the engine, use Komatsu EO (Engine Oil) or equivalent API CI-4/CH-4 rated diesel engine oil. For the hydraulic system, use Komatsu TO (Turbo Oil) or equivalent hydraulic oil meeting Komatsu specifications. For the cooling system, use Komatsu Super Coolant AF-NAC or equivalent extended-life coolant. Always verify the exact viscosity grade and capacity against the machine's operation and maintenance manual for the specific serial range, as capacities vary by configuration.
What is a safety-critical fix related to the cooling system on this engine?
If the engine overheats during heavy work, immediately shut down the machine to prevent catastrophic engine damage. Do not attempt to open the cooling system while it is pressurized or hot. Allow the engine to cool completely before inspecting the coolant level and checking for leaks. Have your dealer verify the cooling system pressure and fan operation before returning the machine to service.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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