Komatsuengine(no series)
Komatsu S6D140E-2D-6(S/N 22537-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu S6D140E-2D-6 (S/N 22537-UP) is a 6-cylinder, turbocharged, aftercooled diesel engine from the 6D140-2 family, designed for heavy-duty earthmoving applications. It powers the Komatsu D275A-5 crawler dozer, a roughly 50-tonne class machine used in mining, quarry, and heavy construction work. The engine is rated in the 306 kW (410 HP) class, with the host dozer carrying an operating weight of about 49,850 kg (109,900 lb) depending on blade and undercarriage configuration. This specific engine designation covers the D275A-5's earlier production run, with later-serial chassis moving to the newer SDA6D140E-3 generation. The line's predecessor, the D275A-2, used a different and larger-displacement 6D170-family engine. Komatsu also offered this engine in a -50C arctic-spec configuration for extreme cold-region operation, alongside the standard-climate build.
Across the D275A-5's production life, Komatsu moved the engine forward from this -2D-6 build to the -3 generation without changing the dozer's model designation, then eventually introduced the D275A-5R with the larger SAA6D140E-5 engine (about 335 kW / 449 HP) as the current top-of-line machine in this size class. The S6D140E-2D-6 represents a step down in displacement from the D275A-2's 6D170-family engine while holding comparable power through turbocharging and aftercooling, reflecting Komatsu's broader shift toward more compact, higher-boost engines. In the used and parts market, this mechanically governed, pre-electronic engine remains valued for its simplicity and serviceability in remote or extreme-climate operations where diagnostic support is limited. As factory parts supply shifts toward the newer -3 and SAA6D140E-5 generations, demand grows for rebuilt injection pumps, turbochargers, and other take-off components to keep early-serial D275A-5 dozers running.
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 S6D140E-2D-6(S/N 22537-UP) specifications
Engine
| Model | S6D140E-2D-6 |
| Series/Generation | 6D140 Series (S6D140E-2D-6 variant) |
| Cylinders | 6 |
| Displacement | 15.2 L (930 in³) |
| Bore | 140 mm (5.51 in) |
| Stroke | 150 mm (5.91 in) |
| Aspiration | Turbocharged, aftercooled |
| Fuel System | Common rail direct injection |
| Cooling | Water-cooled |
| Emissions Tier | Not documented for this exact serial range — verify with your dealer |
| 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 |
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 |
| Digging/Loading Performance | Not documented for this exact serial range — verify with your dealer |
Service capacities (summary)
| 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 |
| Hydraulic System | Not documented for this exact serial range — verify with your dealer |
| Fuel Tank | 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.
S6D140E-2D-6(S/N 22537-UP) fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with oil filter) | 87–99 L (23–26 US gal) | Komatsu Genuine diesel engine oil (EO series, e.g. EO10W-30-DH / EO15W-40-DH) meeting JASO DH-1, API CI-4 and ACEA E7. Grade is picked from the machine's viscosity-by-ambient-temperature chart — lighter 10W-30 for cold climates, 15W-40 for temperate to warm climates. |
| Cooling system (radiator and engine block) | 99–107 L (26–28 US gal) | Komatsu Super Coolant AF-NAC, factory pre-mixed antifreeze/coolant for year-round use and extended service life. Top off with the same AF-NAC concentration; do not mix coolant types. |
| Fuel tank | Not documented for this specific engine arrangement; capacity is a host-machine spec. | Not applicable to this item. |
| Transmission/powertrain compartments | Not applicable to this item. | Not applicable to this item. |
| Final drives | Not applicable to this item. | Not applicable to this item. |
| Hydraulic system and tank | Not applicable to this item. | Not applicable to this item. |
| Axles/differentials | Not applicable to this item. | Not applicable to this item. |
| Grease (external linkage/mounting points, spec only) | n/a | Komatsu Genuine multipurpose grease (lithium EP / moly-EP type) for any external linkage or mounting points on the engine or its brackets, where equipped. Follow the host machine's lubrication interval chart. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Komatsu S6D140E-2D-6(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 |
|
| Every 4,000 h |
|
| Every 8,000 h |
|
Servicing the S6D140E-2D-6(S/N 22537-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Run scheduled engine oil sampling on the S6D140E-2D-6 to catch wear-metal trends before the mechanically governed injection pump or turbocharger bearings fail outright. This engine carries no ECM fault codes, so oil analysis and coolant testing are the only early-warning tools available. Track soot loading and iron/copper counts against baseline, watch coolant freeze point and corrosion-resistor cartridge condition closely given the -50C spec, and log fuel filter differential pressure to predict injection pump wear on the D275A-5 it powers.
Corrective & Common Repairs
Typical corrective work on this engine centers on the mechanical governor and injection pump linkage, turbocharger seal seepage, and cracked or loose air intake ducting from constant thermal cycling in cold-region service. Corrosion resistor cartridge neglect leads to internal coolant passage pitting in the block and head, a frequent complaint on high-hour D275A-5 dozers. Fan belt and mounting isolator failure is common due to repeated cold starts and vibration exposure in heavy earthmoving applications.
Overhaul & Rebuild Points
At 4,000 hours, remove and inspect cylinder liners, pistons, and rings against factory wear tolerances. Rebuild or replace the turbocharger as a unit and check crankshaft main and rod bearing clearances. At 8,000 hours, perform a top-end overhaul: recondition the cylinder head, valve seats, and guides. Replace the injection nozzles and pump as a matched set and inspect the block for cold-climate stress cracking near coolant passages.
Seasonal & Environment Servicing
Built for -50C arctic-spec D275A-5 dozers, this engine needs cold-start discipline: verify the intake air heater or ether-assist starting aid, switch to arctic-grade engine oil and fuel ahead of winter, and confirm coolant concentration protects to the rated temperature before each cold season. Check the corrosion resistor cartridge sight glass daily and replace the element if discolored to prevent internal coolant passage pitting in extreme cold.
S6D140E-2D-6(S/N 22537-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 600-311-7132 | Cartridge,Fuel Filter | Fuel system service | Check fitment → |
| 6162-53-5430 | Packing,Oil Filter And Piping | Lubrication service | Check fitment → |
| 600-211-1231 | Cartridge, Oil Filter | Lubrication service | Check fitment → |
| 600-181-4401 | Element Ass'Y,Outer | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
S6D140E-2D-6(S/N 22537-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 sensor pin | Inspect the sensor wiring and connector for damage or corrosion; replace the speed sensor if voltage readings are abnormal |
| CA111 | Internal engine controller (ECM) fault | Electronic Control Module internal failure or software corruption | Replace or reprogram the ECM; verify power and ground connections to the controller first |
| CA451 | Common rail pressure sensor feedback value too high | Malfunctioning rail pressure sensor, actual overpressure condition, or sensor wiring short | Diagnose the fuel rail pressure sensor circuit and check for physical blockages in fuel lines |
| CA452 | Common rail pressure sensor feedback value too low | Fuel leak, failing fuel pump, or sensor supply voltage issue | Check fuel supply pressure and inspect the pressure sensor harness for shorts or opens |
| CA234 | Engine overspeed | Throttle calibration error, operator misuse, or governor malfunction | Verify throttle calibration and inspect the engine load cycle for mechanical binding |
| CA122 | Intake air pressure sensor feedback voltage too high | Intake pressure sensor failure or wiring short to power | Verify the intake pressure sensor operation and inspect the wiring harness for damage |
| CA123 | Intake air pressure sensor feedback voltage too low | Sensor short to ground or severe airflow restriction upstream of the sensor | Check for sensor short circuits and inspect for air filter clogging or intake blockages |
| CA441 | Battery voltage too low | Weak battery, failing alternator, or loose charging connections | Replace the battery or alternator as needed; check the voltage regulator and charging belt |
| CA442 | Battery voltage too high | Faulty voltage regulator or alternator overcharging | Inspect the alternator and replace if it is overcharging the system |
| AA10NX | Air cleaner clogging | Clogged air filter element or restricted intake path | Replace the air filter element and inspect the intake ducting for obstructions |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
S6D140E-2D-6(S/N 22537-UP) attachments & work tools
Bulldozer Blades
The S6D140E-2D-6 engine powers the D275A-5 series dozers, which utilize semi-U or U-blades for earthmoving. Factory configurations include standard and heavy-duty guarding options for the blade cutting edges and side cutters to withstand abrasive conditions.
Dozer Ripper Attachments
Single-shank or multi-shank rippers are mounted to the rear of the D275A-5 dozer chassis for rock breaking and soil loosening. These tools require specific hydraulic kit arrangements to operate the shank lift and tilt functions, with mounting points integrated into the dozer frame.
Excavator Buckets
The engine is used in PC650-3 excavators, which are equipped with heavy-duty digging buckets ranging from 2.8 to 6.1 m³ in capacity. Bucket selection varies by configuration/series depending on the specific application, with options for rock, heavy, or standard duty.
Excavator Coupler Systems
Hydraulic quick couplers are available for the PC650-3 to facilitate rapid tool changes. These systems require auxiliary hydraulic lines routed through the boom and stick, with specific arrangement notes for hose routing to prevent interference during operation.
Wheel Loader Buckets
The WA500-6 and WA500-7 wheel loaders powered by this engine class utilize general purpose and rock buckets. Typical capacities vary by configuration/series, with standard buckets designed for material handling and heavy-duty variants for mining applications.
Wheel Loader Attachments
Optional work tools for the WA500 series include pallet forks, grapples, and snow buckets. These attachments require specific mounting brackets and hydraulic connections, with guarding options available for high-abrasion environments.
All S6D140E-2D-6(S/N 22537-UP) assemblies by section
Every catalogued assembly group for the Komatsu S6D140E-2D-6(S/N 22537-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Engine
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Air Cleaner (With Intake Extension Pipe)(#27374-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 8 |
| 01***40 | Capscrew | 2 |
| 01***08 | Nut,(For Canvas Canopy?Head Guard) | 8 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Air Intake Manifold(#23227-)
| 01***75 | Bolt (M10-1.50x75) | 12 |
| 01***35 | Capscrew | 8 |
| 01***50 | Screw | 4 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Alternator (50a) (With Hardening Pulley) (Inner Parts)(#23227-27965)
| 60***10 | Alternator A. (50a) | 1 |
| SD***X0 | Coil Assembly | 1 |
| SD***X0 | Washer | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Alternator (60a) (With Hardening Pulley) (Inner Parts)(#27966-)
| 60***70 | Alternator A. (60a),(See Fig.A6010-B4k6) | 1 |
| KD***70 | Bushing,Insulate | 2 |
| KD***40 | Bushing,Insulate | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Alternator (75a) (With Hardening Pulley) (Inner Parts)(#24911-30743)
| 60***10 | Alternator A. (75a) | 1 |
| SD***X0 | Coil Assembly | 1 |
| SD***X0 | Washer | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Alternator Mounting (50a) (With Hardening Pulley)(#23227-)
| 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 : S6d140e-2d-6(S/N 22537-Up) : Engine : Alternator Mounting (75a) (With Hardening Pulley)(#24911-)
| 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 : S6d140e-2d-6(S/N 22537-Up) : Engine : Camfollower Cover(#26526-)
| 01***30 | Bolt,(With Body Positioner) | 5 |
| 01***60 | Bolt,(F4320-52a0 -5- ) | 1 |
| 01***70 | Bolt - Bracket And Oil Inlet Tubemounting | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Camfollower(#26075-)
| 04***12 | Ring, Retaining | 4 |
| 61***30 | Pin,Dowel | 12 |
| 61***20 | Ball | 1 |
Komatsu : S6d140e-2d-6(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 : S6d140e-2d-6(S/N 22537-Up) : Engine : Cooling Fan(#27478-)
| 60***60 | Fan, Cooling | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Corrosion Resistor And Piping(#23227-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 4 |
| 01***90 | Bolt,(For No?1 And No?3 Housing) | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Crank Pulley (Hardening)(#23227-)
| 04***24 | Pin,Dowel (For No.3 Housing) | 1 |
| 62***20 | Bolt | 6 |
| 62***10 | Pulley? Hardening | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Crankshaft
| 61***30 | Key Parallel | 1 |
| 62***00 | Bearing Assembly | 1 |
| 62***10 | Main Bearing Assembly | 7 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Cylinder Block (1/2)(#26698-)
| 01***45 | Washer,(Without R.O.P.S.) | 14 |
| 04***14 | Pin, Dowel | 2 |
| 04***20 | Pin,Dowel (Welded) | 12 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Cylinder Block (2/2)(#26698-)
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 2 |
| 01***25 | Screw | 6 |
| 01***16 | Washer,(With Water Separator) | 6 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Cylinder Block Gasket Kit(#23227-)
| 01***12 | Washer,(F2320-63a2 -13 ) | 2 |
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
| 07***25 | O-Ring,Corrosion Resistor | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Cylinder Block Mounting (With Block Heater)(#26119-)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 7 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Cylinder Block Mounting(#26119-)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 7 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
Komatsu : S6d140e-2d-6(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 : S6d140e-2d-6(S/N 22537-Up) : Engine : Cylinder Head Gasket Kit(#23227-)
| 02***75 | O-Ring,(For Japan) (K1) | 4 |
| 02***81 | O-Ring,Air Connector | 2 |
| 07***21 | O-Ring,Oil Cooler Pipe | 18 |
Komatsu : S6d140e-2d-6(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 : S6d140e-2d-6(S/N 22537-Up) : Engine : Ejector Piping (For Air Cleaner With Intake Extension Pipe)(#23227-)
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 1 |
| 01***35 | Bolt,(F4320-52a0 -5 ) | 2 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Element (Ordering Transferded Parts)(#27120-)
| 60***31 | Cartridge, Oil Filter | 1 |
| 60***32 | Cartridge,Fuel Filter | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Engine Mounting(#25131-)
| 01***45 | Bolt,(For Travel Motor) (Not Show) | 8 |
| 01***45 | Capscrew - M16 | 8 |
| 01***45 | Washer,(For Travel Motor) (Not Show) | 8 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Engine Stop Motor(#23227-)
| 01***16 | Bolt - Box Mounting | 3 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 3 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Exhaust Manifold(#22885-)
| 01***55 | Screw | 2 |
| 01***00 | Screw | 22 |
| 07***08 | Plug,(For W/O. Corrosion Resistor) | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Fan Drive (With Hardening Pulley)(#23227-)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 6 |
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***55 | Bolt - Mount Cage To Transmission Case | 3 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Fan Pulley (With Hardening Pulley) (With Air Conditioner)(#23227-)
| 01***30 | Bolt,(With Body Positioner) | 6 |
| 04***61 | V-Belt,(For Air Conditioner) | 1 |
| 04***63 | V-Belt Set,(High Speed Pulley) (E/J) | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Flywheel Housing(#23227-)
| 01***45 | Bolt,(For Slag Handling) | 8 |
| 01***60 | Bolt, Hanger Bearing Mounting | 2 |
| 01***45 | Capscrew - M16 | 8 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Flywheel(#23227-)
| 04***16 | Pin,(Dowel) | 6 |
| 61***51 | Gear, Ring | 1 |
| 62***50 | Bolt | 6 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Front Cover Mounting(#26119-)
| 01***16 | Bolt - Box Mounting | 2 |
| 01***30 | Bolt - M8 X 30lg | 2 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Front Cover(#26084-)
| 07***16 | Plug, Expansion | 7 |
| 62***10 | Cover,Front | 1 |
| 67***21 | Seal? Front,(See Fig.A2040) | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Front Power Take Off (Without Front Power Take Off)(#23227-)
| 01***20 | Bolt,(For Mono Lever Steering) | 3 |
| 01***30 | Bolt,(With Body Positioner) | 3 |
| 01***25 | Bolt,(Without Rops Guard? Canopy) | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Fuel Filter(#27396-)
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 07***08 | Plug,(Without Lock-Up), Plug | 1 |
| 60***32 | Cartridge,Fuel Filter | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Fuel Filter(#27478-)
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 07***08 | Plug,(Without Lock-Up), Plug | 1 |
| 60***32 | Cartridge,Fuel Filter | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Fuel Injection Pump (Coupling) (Inner Parts)(#24132-)
| DK***00 | Coupling | 1 |
| DK***00 | Bolt | 6 |
| DK***00 | Bolt | 2 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Fuel Injection Pump (Feed Pump) (Inner Parts)(#24132-)
| DK***20 | Bolt, Joint | 1 |
| DK***20 | Housing | 1 |
| DK***00 | Valve,Check | 4 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Inner Parts)(#24132-)
| DK***00 | Gasket | 1 |
| DK***00 | Screw | 1 |
| DK***20 | Flyweight Ass'Y | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Inner Parts)(#24132-)
| DK***00 | Gasket | 1 |
| DK***00 | Spring | 1 |
| DK***00 | Nut,Cap | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#24132-)
| 62***10 | Injection Pump A | 1 |
| DK***30 | Bearing,Roller | 2 |
| DK***00 | Bearing, Center | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#24132-)
| DK***20 | Plunger Ass'Y | 1 |
| DK***20 | Plunger Block A | 6 |
| DK***00 | Shim? 0.875mm | 0 |
Komatsu : S6d140e-2d-6(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 : S6d140e-2d-6(S/N 22537-Up) : Engine : Fuel Injection Pump Lubricator(#23227-)
| 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 : S6d140e-2d-6(S/N 22537-Up) : Engine : Fuel Injection Pump Mounting(#24132-)
| 01***90 | Bolt,(For No?1 And No?3 Housing) | 4 |
| 01***16 | Washer,Radio Controlled Slag Handling | 4 |
| 42***31 | Tube | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Fuel Injection Pump Piping
| 01***25 | Capscrew | 4 |
| 01***30 | Screw | 4 |
| 01***35 | Bolt | 4 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Fuel Return(#23227-)
| 07***16 | Tube,Spill (S6d110-1a? S6d110-1b) | 1 |
| 07***85 | Clip | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Gasket (Ordering Transferded Parts)(#27120-)
| 62***20 | Gasket, Rocker Lever Housing | 6 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Head Cover Mounting(#26084-)
| 01***55 | Screw | 18 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Head Cover(#26084-)
| 62***11 | Cover,Rocker Arm Housing | 6 |
| 62***20 | Gasket, Rocker Lever Housing | 6 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Heater Switch Wiring(#23227-)
| 01***10 | Bolt,(With Auto Emergency Steering) | 2 |
| 01***10 | Washer,(For 35a Alternator) | 2 |
| 08***19 | Cap, At Heater Relay Terminals | 3 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Hood (With Intake Extension Pipe) (Ordering Transferded Parts)(#27120-)
| 60***40 | Hood,(With Extension Type) | 1 |
Komatsu : S6d140e-2d-6(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 : S6d140e-2d-6(S/N 22537-Up) : Engine : Injection Nozzle(#23227-)
| 01***20 | Capscrew | 6 |
| 07***21 | O-Ring,Oil Cooler Pipe | 18 |
| 07***21 | Seal, O-Ring | 6 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Lubricating Oil Adapter(#27478-)
| 01***16 | Bolt - Seat And Tether Belt Mounting | 3 |
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Muffler (For Air Cleaner With Intake Extension Pipe)(#23227-)
| 01***20 | Bolt,(For Mono Lever Steering) | 2 |
| 01***45 | Capscrew | 3 |
| 01***50 | Bolt | 4 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Name Plate (For Regulation Of Epa)(#27478-)
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Name Plate And Caution Plate (For Eu Exhaust Gas Regulation)(#26616-27978)
| 04***50 | Screw | 4 |
| 61***10 | Plate? Name,(Limited Supply) | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Name Plate And Caution Plate(#25887-)
| 04***50 | Screw | 4 |
| 09***40 | Plate? Name,(Limited Supply) (English) | 1 |
| 60***00 | Plate,(Limited Supply) | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Nozzle Holder (Inner Parts)(#23227-)
| 62***31 | Connector | 1 |
| 62***00 | Nozzle Holder Ass'Y | 6 |
| 62***20 | Nozzle | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Oil Cooler
| 01***20 | Bolt, Wiring Harness Mounting Bracket | 2 |
| 01***30 | Bolt,(With Body Positioner) | 13 |
| 01***60 | Bolt,(F4320-52a0 -5- ) | 2 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Oil Filter(#27478-)
| 07***35 | O-Ring,Transmission Valve Mount | 1 |
| 60***30 | Plug | 1 |
| 60***40 | Seal, O-Ring | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Oil Level Gauge (With Oil Pan Heater)(#27478-)
| 61***20 | Collar | 1 |
| 61***30 | Nut,(For Shipping) | 1 |
| 62***10 | Gauge,Oil Level | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Oil Level Gauge(#27478-)
| 61***20 | Collar | 1 |
| 61***30 | Nut,(For Shipping) | 1 |
| 62***10 | Gauge,Oil Level | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Oil Pan And Suction Tube (With Oil Pan Heater)(#27478-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 40 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***50 | Bolt,(Spark Arrester Spec.) | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Oil Pan And Suction Tube(#27478-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 40 |
| 01***30 | Bolt,(With Body Positioner) | 2 |
| 01***12 | Bolt,(See Fig. K0210-16a0) | 3 |
Komatsu : S6d140e-2d-6(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 : S6d140e-2d-6(S/N 22537-Up) : Engine : Piston
| 02***13 | Pin, Dowel | 2 |
| 04***20 | Ring, Retaining | 12 |
| 62***10 | Bolt | 2 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Rocker Arm And Housing(#26075-)
| 01***80 | Bolt (M12-2.00x80) | 6 |
| 01***80 | Bolt (M10-1.50x80) | 16 |
| 01***20 | Bolt (M12-1.75x120) | 12 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Starting Motor (11kw) (Inner Parts)(#22653-28710)
| 60***10 | Starting Motor Ass'Y,(11kw) | 1 |
| SD***X0 | Bearing,Ball | 1 |
| SD***X0 | Brush Holder Ass'Y | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Starting Motor (11kw) (Inner Parts)(#28711-)
| 60***11 | Starting Motor Ass'Y,(11kw) | 1 |
| KD***40 | Spring,Spring | 4 |
| KD***57 | Bearing, Ball, Front | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Starting Motor Mounting (11kw)(#22653-28710)
| 01***40 | Bolt (Kit) | 3 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***16 | Washer,Radio Controlled Slag Handling | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Starting Motor Mounting (11kw)(#28711-)
| 01***40 | Bolt (Kit) | 3 |
| 01***16 | Bolt, Battery To Frame Ground Wire Attaching | 1 |
| 01***16 | Washer,Radio Controlled Slag Handling | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Tamper Proof Kit (For Regulation Of Epa)(#23257-)
| 61***10 | Tamper Proof Kit | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Thermostat Housing(#25659-)
| 01***25 | Bolt,(For Canvas Canopy?Head Guard) | 2 |
| 01***65 | Screw | 5 |
| 01***10 | Bolt | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Turbocharger (Inner Parts)(#23227-)
| 01***16 | Bolt | 4 |
| 01***16 | Bolt | 8 |
| 01***16 | Bolt | 8 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Turbocharger Mounting And Lubricator(#23227-)
| 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 : S6d140e-2d-6(S/N 22537-Up) : Engine : V-Belt (Ordering Transferded Parts)(#27120-)
| 04***63 | V-Belt Set,(High Speed Pulley) (E/J) | 1 |
| 62***40 | V-Belt Set,Alternator Drive | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Water Pump Gasket Kit(#23227-)
| 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 : S6d140e-2d-6(S/N 22537-Up) : Engine : Water Pump(#25659-)
| 01***20 | Bolt,(For Mono Lever Steering) | 1 |
| 01***30 | Bolt,(With Body Positioner) | 4 |
| 01***80 | Bolt,(With Corrosion Resistor) | 1 |
Komatsu : S6d140e-2d-6(S/N 22537-Up) : Engine : Water Separator (Ordering Transferded Parts)(#27396-)
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 60***90 | O-Ring | 1 |
| 60***31 | Separator Assembly, Water | 1 |
S6D140E-2D-6(S/N 22537-UP) serial number reference
The Product Identification Number (PIN) plate is typically located on the right-hand side of the cab on the lower frame, near the front idler or beneath the operator's window. To read the prefix, locate the 17-character ISO PIN on the emissions/export plate; the first three characters (e.g., KMT) identify the manufacturer (Komatsu), while the subsequent characters encode the model family and configuration, distinct from the engine model code stamped on the engine block.
| Prefix | Identifies | Notes |
|---|---|---|
| S6D140E-2D-6 | Engine Model | Identifies the specific engine configuration (S6D140E-2D-6) fitted to the machine. The source text explicitly lists this model designation with the serial range 22537-UP in the parts catalog header. This engine is a 6-cylinder, 15.2-liter turbocharged diesel with a 140mm bore, used in heavy-duty applications such as large excavators and dozers. The '2D-6' suffix indicates the specific generation and emissions configuration variant within the 6D140 family. No other 3-character PIN prefixes are documented for this specific engine serial range in the provided sources. |
Frequently asked questions
What is the engine type?
The Komatsu S6D140E-2D-6 is a 6-cylinder, turbocharged, aftercooled, mechanically governed inline-six diesel engine from the 6D140-2 family.
What is the operating weight of the host machine?
The host machine, the Komatsu D275A-5 crawler dozer, carries an operating weight of about 49,850 kg (109,900 lb) depending on blade and undercarriage configuration.
What replaced it?
Later-serial D275A-5 chassis moved to the newer SDA6D140E-3 generation of the same base engine, and the line's successor, the D275A-5R, uses the larger SAA6D140E-5 engine.
What S6D140E-2D-6(S/N 22537-UP) owners discuss
What are the known powertrain and hydraulic behaviors for the S6D140E-2D-6 engine series?
The S6D140E-2D-6 is a six-cylinder, turbocharged, and aftercooled diesel engine. It is mechanically governed and lacks an electronic control module (ECM), meaning it does not generate fault codes. Operators must rely on oil analysis and coolant testing for early warning of wear. The engine is known for high torque capabilities and robust performance in heavy-duty applications. However, if the hydraulic pump fails, the engine is often damaged shortly after due to the interconnected nature of the systems in this machine class. Dash-6 generation machines are noted for specific valve problems, particularly in smaller excavators, but the larger S6D140E-2D-6 units are generally reliable if maintained. Hydraulic weakness when hot indicates internal leakage in pumps, main control valves, or motors, as viscosity decreases with temperature. Cold-starting requires discipline, including verifying intake air heaters or ether-assist aids, especially in cold climates.
What undercarriage or wear patterns are typical for machines powered by this engine?
Machines equipped with the S6D140E-2D-6 engine, such as large excavators and dozers, experience significant wear on bushings, bearings, and track pads. Worn bushings lead to noise and vibration, while worn bearings cause premature track failure. Undercarriage components are subject to heavy loads and should be inspected regularly. The S6D140E-2D-6 is often found in machines with longer undercarriages (denoted by 'E' or 'LC' in model codes), which increases the surface area and wear potential. Track tension must be monitored closely, as repeated loosening indicates issues with the adjuster or component wear. Operators should check for mud or debris packed into the undercarriage, which can cause uneven wear and pulling to one side during travel.
What are the common engine quirks and maintenance requirements for the S6D140E-2D-6 series?
The S6D140E-2D-6 engine uses hardened liners matched to high-alloy rings and a Bosch-style fuel system with injectors firing at 3,200 PSI. It does not have an ECM, so maintenance relies on scheduled oil sampling to catch wear-metal trends before the mechanically governed injection pump or turbocharger bearings fail. Common corrective work includes addressing turbocharger seal seepage, cracked or loose air intake ducting from thermal cycling, and neglect of the corrosion resistor cartridge, which leads to internal coolant passage pitting. The engine is robust but sensitive to contamination; extended service intervals and low-quality fuel accelerate wear. Oil consumption can be serious if liners or rings expire, with some units consuming up to 10 liters in 8 hours of work. Regular coolant testing is critical to prevent corrosion and pitting.
What are the common electrical or sensor issues associated with this engine and its host machines?
While the S6D140E-2D-6 engine itself is mechanically governed and lacks an ECM, the host machines (such as PC900 excavators or D275 dozers) rely heavily on electronic control systems for other functions. Owners report intermittent starting, dashboard failures, and random shutdowns due to faulty sensors or unstable power supplies in the machine's electrical system. Multiple fault codes in the machine's display often point to battery, ground, or connector issues rather than engine failure. A battery that shows acceptable voltage until loaded may cause starting issues; a load and voltage-drop test is recommended before replacing the starter. Engine starting problems are often traced to fuel supply issues, air in the fuel system, or faulty batteries rather than the engine's internal mechanics.
What should be checked when buying a used machine with the S6D140E-2D-6 engine (S/N 22537-UP)?
When purchasing a used machine with the S6D140E-2D-6 engine (S/N 22537-UP), verify the intake air heater or ether-assist starting aid for cold-start capability. Check the condition of the corrosion resistor cartridge and coolant freeze point to prevent internal pitting. Inspect the turbocharger for seal seepage and the air intake ducting for cracks or looseness. Review oil analysis reports for wear-metal trends, as the engine lacks ECM fault codes. Check the hydraulic system for weakness when hot, which indicates internal leakage. Inspect the undercarriage for wear on bushings, bearings, and track pads, and verify track tension. Ensure the engine oil and hydraulic oil are of the correct specification (Komatsu EO or equivalent) and that filters have been changed regularly. Be aware that Komatsu genuine parts are expensive; aftermarket options are available for undercarriage and some engine components.
What are the fluid specifications and capacities for the S6D140E-2D-6 engine?
The S6D140E-2D-6 engine requires Komatsu EO engine oil or equivalent. Hydraulic oil should be Komatsu TO or equivalent. Coolant should be Super-coolant AF-NAC or equivalent, with concentration verified to protect to the rated temperature. Specific capacities vary by the host machine configuration (e.g., excavator vs. dozer) and are not documented for the engine alone in the provided sources. Always consult the machine's operation and maintenance manual for exact fluid volumes. For cold climates, switch to arctic-grade engine oil and fuel ahead of winter.
What safety-critical fixes or verifications are recommended for the S6D140E-2D-6 engine?
Verify the intake air heater or ether-assist starting aid before cold starts to prevent engine damage. Confirm coolant concentration protects to the rated temperature to avoid freezing or overheating. Check the corrosion resistor cartridge condition to prevent internal coolant passage pitting. Have your dealer verify the engine's mechanical governor and injection pump linkage adjustment, as improper calibration can lead to poor performance or damage. Have your dealer verify the turbocharger seal condition and air intake ducting integrity, as leaks can cause engine damage. Have your dealer verify the hydraulic system pressure and flow, especially when hot, to ensure proper operation and prevent premature wear.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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