Komatsuengine(no series)

Komatsu SA6D140E-2A(S/N 22537-UP)

Maintenance schedule, common problems & OEM parts breakdown

Search live SA6D140E-2A(S/N 22537-UP) parts

The Komatsu SA6D140E-2A (S/N 22537-UP) is a 15.24-liter (930 cu in), inline-six, water-cooled, turbocharged, and aftercooled diesel engine belonging to the 6D140-2 family. It serves as the powerplant for the Komatsu D275A-5 crawler dozer, a roughly 50-tonne class machine used in mining, quarry, and heavy earthmoving applications. The engine is rated at approximately 368 kW (493 hp) gross power at 1900 rpm, with maximum torque of 2237 N*m at 1200 rpm. The D275A-5 host machine carries an operating weight of about 49,850 kg (109,900 lb), varying by blade and undercarriage configuration. This specific engine arrangement covers the earlier production run of the D275A-5, including a -50°C arctic-spec configuration for extreme cold-region operation.

Komatsu transitioned the D275A-5 from this -2E-9 build to the newer SDA6D140E-3 generation without changing the dozer model designation, before eventually introducing 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 SA6D140E-2A represents a step down in displacement from the D275A-2's 6D170-family engine while holding comparable power through higher boost, reflecting a shift toward more compact 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 SA6D140E-2A(S/N 22537-UP) specifications

Engine

Model	SA6D140E-2A (S/N 22537-UP)
Engine Family	6D140-2 series
Configuration	Inline 6-cylinder, water-cooled, turbocharged with aftercooling
Bore x Stroke	140 mm x 165 mm (5.51 in x 6.50 in)
Displacement	15.24 L (930 cu in)
Gross Power	Approx. 368 kW (493 hp) at 1900 rpm
Maximum Torque	Approx. 2237 N*m at 1200 rpm
Fuel System	Direct-injection diesel with mechanical/jerk-pump governing
Emissions Tier	Predates modern exhaust-emissions regulation (uncontrolled/mechanical-era design)

Weights

Engine Dry Weight

Not documented for this specific arrangement

Dimensions

Engine External Dimensions

Not documented for this specific arrangement

Performance

Rated Speed	Approx. 1900 rpm
Peak Torque Speed	Approx. 1200 rpm
Idle Speed	Not documented for this arrangement

Service capacities (summary)

Engine Oil (crankcase with filter)	Approx. 87–99 L (23–26 US gal)
Cooling System	Approx. 99–107 L (26–28 US gal)
Fuel Tank	Not applicable (host-machine spec)
Hydraulic System	Not applicable (host-machine spec)

Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.

SA6D140E-2A(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 applicable to this item	This is a bare engine assembly fitted across several Komatsu machine chassis depending on arrangement; fuel, transmission, hydraulic, final-drive and axle capacities and fluid choices are set by the host machine's own operation & maintenance manual, not the engine documentation.
Transmission/powertrain compartments	not applicable to this item	This is a bare engine assembly fitted across several Komatsu machine chassis depending on arrangement; fuel, transmission, hydraulic, final-drive and axle capacities and fluid choices are set by the host machine's own operation & maintenance manual, not the engine documentation.
Final drives	not applicable to this item	This is a bare engine assembly fitted across several Komatsu machine chassis depending on arrangement; fuel, transmission, hydraulic, final-drive and axle capacities and fluid choices are set by the host machine's own operation & maintenance manual, not the engine documentation.
Hydraulic system and tank	not applicable to this item	This is a bare engine assembly fitted across several Komatsu machine chassis depending on arrangement; fuel, transmission, hydraulic, final-drive and axle capacities and fluid choices are set by the host machine's own operation & maintenance manual, not the engine documentation.
Axles/differentials	not applicable to this item	This is a bare engine assembly fitted across several Komatsu machine chassis depending on arrangement; fuel, transmission, hydraulic, final-drive and axle capacities and fluid choices are set by the host machine's own operation & maintenance manual, not the engine documentation.
Grease (external linkage/mounting points, spec only)	n/a — specification only	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 SA6D140E-2A(S/N 22537-UP) maintenance schedule

Service interval	Tasks
Every 10 h	Check engine oil level and top up with cold-weather-grade oil before starting each shift. Check coolant level in the sub-tank and look for leaks around the block, water pump, and turbocharger housing. Drain water and sediment from the fuel tank and fuel pre-filter/water separator. Check the corrosion resistor cartridge sight glass on the coolant circuit and replace the element if discolored. Inspect fan belt tension and condition for cracking from repeated cold starts. Check turbocharger intake ducting and clamps for looseness or cracks.
Every 250 h	Change engine oil and replace the oil filter, using the viscosity grade specified for the operating climate. Replace the fuel filter cartridge. Clean or replace the air cleaner outer element and inspect the safety element. Grease the injection pump and governor linkage points. Clean the radiator and oil cooler cores of debris and packed dust. Check turbocharger and exhaust manifold mounting bolts for correct torque.
Every 500 h	Replace the corrosion resistor cartridge on the engine coolant circuit. Check and adjust fan belt tension; replace a worn or glazed belt. Clean the crankcase breather and fuel tank breather. Inspect the turbocharger for oil seepage at the compressor and turbine seals. Check engine mounting bolts and isolators for looseness. Test coolant freeze-point protection ahead of continued cold-region service.
Every 1,000 h	Replace the fuel pre-filter/water separator element and the main fuel filter. Check and adjust valve clearance per the mechanical fuel-injection engine's service settings. Inspect and clean the turbocharger compressor and turbine housings. Sample engine oil for wear-metal and coolant-contamination analysis. Check injection pump timing and governor linkage adjustment. Inspect the aftercooler core and intake piping for leaks or fouling.
Every 2,000 h	Drain and replace engine coolant; flush the cooling system and renew the corrosion resistor. Inspect the fuel injection pump and nozzles; test and reset injection timing. Check turbocharger shaft end-play and bearing wear; rebuild or replace if out of tolerance. Re-torque cylinder head bolts to the mechanical-injection engine's specification. Check the water pump and thermostat for wear and correct opening temperature. Inspect the cold-start aid circuit (intake heater or ether-assist system) fitted for -50C operation.
Every 4,000 h	Remove and inspect cylinder liners, pistons, and rings against factory wear tolerances. Rebuild or replace the turbocharger as a unit. Check crankshaft main and rod bearing clearances. Inspect the camshaft and timing gear train for wear.
Every 8,000 h	Perform a top-end overhaul: recondition the cylinder head, valve seats, and guides. Replace the injection nozzles and pump as a matched set. Inspect the block for cold-climate stress cracking near coolant passages. Rebuild the turbocharger core assembly, replacing wear-prone bearings and seals.

Servicing the SA6D140E-2A(S/N 22537-UP) beyond the schedule

Predictive Maintenance & Fluid Analysis

Run scheduled engine oil sampling on the SA6D140E-2A 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. 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. Address intake ducting leaks promptly to prevent unfiltered air ingestion and accelerated turbo wear.

Overhaul & Rebuild Points

At 4,000 hours, remove and inspect cylinder liners, pistons, and rings against factory wear tolerances. Check crankshaft main and rod bearing clearances and inspect the camshaft and timing gear train for wear. 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. Inspect the block for cold-climate stress cracking near coolant passages and rebuild the turbocharger core assembly, replacing wear-prone bearings and seals.

Seasonal & Environment Servicing

For the -50°C arctic-spec configuration, inspect the cold-start aid circuit (intake heater or ether-assist system) at the 2,000-hour interval. Test coolant freeze-point protection ahead of continued cold-region service at 500 hours. Use lighter 10W-30 Komatsu EO oil for cold climates and 15W-40 for temperate to warm climates. Check fan belt tension and condition for cracking from repeated cold starts during the 10-hour daily checks. Ensure the corrosion resistor cartridge is replaced if discolored to prevent internal coolant passage pitting in extreme cold.

SA6D140E-2A(S/N 22537-UP) common service parts

Part number	Part	Notes
6128-81-7042	Element Assembly, Air Cleaner	Air intake service	Check fitment →
600-211-1231	Cartridge, Oil Filter	Lubrication service	Check fitment →
6212-51-5301	Oil Filter Assembly	Lubrication service	Check fitment →
600-181-4400	Element Assembly, Outer	Scheduled service item	Check fitment →
6211-61-2111	Element	Scheduled service item	Check fitment →

Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.

SA6D140E-2A(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 or software 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
AA10NX	Air cleaner clogging	Dirty or blocked air filter element	Replace the air filter
CA122	Intake air pressure high voltage	Intake pressure 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)	Faulty IAT sensor	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.

SA6D140E-2A(S/N 22537-UP) attachments & work tools

Bulldozer Attachments

The SA6D140E-2A engine powers the D155A series (A-3, A-5, AX-3, AX-5) and D275A-5 crawler dozers. Factory configurations include standard straight blades and angle dozer blades for earthmoving and mining applications. The engine's power output supports the roughly 50-tonne class machine weight.

Hydraulic Excavator Attachments

Compatible with the PC750-6, PC800-6, and PC1800-6 excavator families. Standard work tools include heavy-duty digging buckets and trenching buckets. The engine is also used in the PC1600SP-1 model, requiring high-flow hydraulic arrangements for large-scale excavation.

Wheel Loader Attachments

Used in the WA500-3 wheel loader. Typical work tools include general-purpose buckets and rock buckets. The engine configuration supports the machine's lifting capacity and travel requirements in material handling operations.

Motor Grader Attachments

Powers the GD825A-1 and GD825A-2 motor graders. Standard attachments include the moldboard and ripper. The engine provides the necessary torque for grading and road construction tasks.

Dump Truck Attachments

Installed in the HD325-6 and HD405-6 off-highway dump trucks. The engine configuration supports the heavy payload capacity and transmission requirements for mining and quarry haulage.

Generator Set Attachments

Used in the DCA400SSK-2 and MQ generator sets. The engine is configured for constant speed operation to drive the alternator. Factory guarding and mounting options are specific to stationary power generation applications.

All SA6D140E-2A(S/N 22537-UP) assemblies by section

Every catalogued assembly group for the Komatsu SA6D140E-2A(S/N 22537-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Engine

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : After Cooler Water Piping

01***16	Bolt, Battery To Frame Ground Wire Attaching	1
01***30	Bolt,(With Body Positioner)	4
01***35	Bolt,(F4320-52a0 -5 )	4
01***40	Bolt (Op)	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Air Cleaner

01***55	Screw	2
01***00	Screw	22
07***08	Plug,(For W/O. Corrosion Resistor)	1
61***20	Spacer,(For Shipping)	22

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Air Cleaner (Inner Parts)

61***90	Nut, Mounting	4
61***10	Screw	4
62***31	Gasket, Turbocharger	1
(6***0)	Turbocharger Ass'Y,(See Fig.A1530-B4f5z)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Air Intake Manifold And After Cooler

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
07***00	Valve,Drain	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Alternator (35a) (Hardening Pulley) (Inner Parts)

62***20	Injection Pump Ass'Y	1
62***21	Injection Pump Ass'Y	1
DK***30	Bearing,Roller	2
DK***00	Bearing, Center	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Alternator (60a) (Inner Parts)

62***30	Injection Pump Ass'Y	1
DK***30	Bearing,Roller	2
DK***00	Bearing, Center	1
DK***00	Shim? 0.50mm	0

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Alternator Mounting (35a) (Hardening Pulley)

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
62***10	Tube	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Alternator Mounting (60a) (Hardening Pulley)

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
62***10	Tube	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Camfollower

01***45	Bolt,(For Slag Handling)	8
01***60	Bolt, Hanger Bearing Mounting	2
01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	4
07***16	Gasket,(For Pc750-6) (See Fig.A2110)	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Camfollower Cover

01***25	Bolt,(For Canvas Canopy?Head Guard)	6
01***20	Bolt,(Without Rops Guard? Canopy)	1
01***25	Bolt,(Without Rops Guard? Canopy)	2
01***25	Screw	6

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Camshaft

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
61***20	Collar	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Common Rail (Inner Parts)(#110001-110508)

01***20	Bolt (M12-1.75x20)	2
04***25	Key, Plain Woodruff	1
04***12	Ring, Retaining	4
61***20	Ball	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Corrosion Resistor

01***20	Bolt, Wiring Harness Mounting Bracket	2
01***30	Bolt,(With Body Positioner)	13
01***60	Bolt,(F4320-52a0 -5- )	2
01***90	Capscrew	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Crank Pulley

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
61***20	Collar	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Crankshaft

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
01***16	Washer,Radio Controlled Slag Handling	40

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Cylinder Block

01***30	Bolt,(With Body Positioner)	5
01***08	Nut,(For Canvas Canopy?Head Guard)	1
01***32	Washer,(With Auto Emergency Steering)	6
07***49	Clamp, Hose	4

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Cylinder Block Cover And Oil Filler (With Water Temperature Sensor)

01***30	Bolt,(With Body Positioner)	5
01***08	Nut,(For Canvas Canopy?Head Guard)	1
01***32	Washer,(With Auto Emergency Steering)	6
07***49	Clamp, Hose	4

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Cylinder Block Gasket Kit

DK***20	Washer	2
DK***00	Plate	2
DK***00	Bolt	1
DK***00	Bolt	4

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Cylinder Head Gasket Kit

DK***80	Shim? 0.5mm	0
DK***00	Washer,Spring	1
DK***80	Bolt,Eye	1
DK***00	Screw	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Cylinder Head(#110001-110149)

01***20	Bolt (M10-1.75x120)	6
04***20	Pin,Dowel (Welded)	2
07***25	O-Ring,Lubrication Valve	1
07***08	Plug (Kit)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Cylinder Head(#110150-)

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Engine Mounting

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
01***70	Bolt - Bracket And Oil Inlet Tubemounting	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Exhaust Manifold

01***16	Bolt	4
01***16	Bolt	8
04***08	Pin, Dowel	1
04***50	Screw	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Flywheel

01***30	Bolt - M8 X 30lg	6
61***60	Pin, Dowel	1
61***43	Bolt	1
62***14	Shaft	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Flywheel Housing

01***16	Bolt - Box Mounting	2
01***20	Bolt,(For Mono Lever Steering)	2
01***25	Bolt,(For Canvas Canopy?Head Guard)	5
01***30	Bolt,(With Body Positioner)	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Front Cover

01***45	Washer,(Without R.O.P.S.)	14
04***14	Pin, Dowel	2
04***20	Pin,Dowel (Welded)	12
04***24	Pin,Dowel (For No.3 Housing)	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Front Cover Mounting And Breather

01***45	Washer,(Without R.O.P.S.)	14
04***14	Pin, Dowel	2
04***20	Pin,Dowel (Welded)	12
04***24	Pin,Dowel (For No.3 Housing)	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Front Power Take Off (Non Drive Spec.)

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Front Power Take Off (Sandy And Dusty Spec.)

61***51	Gear, Ring	1
62***50	Bolt	6
62***00	Flywheel Ass'Y	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Fuel Control (Chassis Mount)

01***20	Bolt,(For Mono Lever Steering)	2
01***35	Bolt, Mount Ground Driven Steering Pump	1
07***85	O-Ring,Transmission Case Mount	1
07***00	O-Ring,(For Dual Water Pump)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Fuel Control (Chassis Mount)(#110157-)

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Fuel Filter

01***20	Bolt,(For Mono Lever Steering)	3
01***25	Bolt,(Without Rops Guard? Canopy)	1
01***15	Bolt, Fan Mounting	1
01***35	Capscrew	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Fuel Injector

01***20	Bolt, Wiring Harness Mounting Bracket	5
01***30	Bolt,(With Body Positioner)	3
01***25	Bolt,(Without Rops Guard? Canopy)	1
01***15	Bolt, Fan Mounting	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Fuel Piping

01***20	Bolt, Wiring Harness Mounting Bracket	5
01***30	Bolt,(With Body Positioner)	3
01***25	Bolt,(Without Rops Guard? Canopy)	1
01***15	Bolt, Fan Mounting	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Fuel Pump Supply And Return Piping

01***85	Screw	6
01***45	Washer,(For Travel Motor) (Not Show)	6
04***24	Pin,Dowel (For No.3 Housing)	1
62***30	Pulley? Hardening	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Fuel Return

01***20	Bolt,(For Mono Lever Steering)	2
01***35	Bolt, Mount Ground Driven Steering Pump	1
07***85	O-Ring,Transmission Case Mount	1
07***00	O-Ring,(For Dual Water Pump)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Fuel Supply Pump (Feed Pump) (Inner Parts)

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Fuel Supply Pump (Pump) (Inner Parts)

01***80	Bolt (M12-2.00x80)	6
01***80	Bolt (M10-1.50x80)	17
01***20	Bolt (M12-1.75x120)	12
01***08	Nut,R.H. Thread	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Fuel Supply Pump And Common Rail Mounting

02***13	Pin, Dowel	2
04***20	Ring, Retaining	12
62***10	Bolt	2
62***40	Bearing Assembly	6

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Fuel Supply Pump Bracket And Connection Cover

01***20	Bolt (M12-1.75x20)	2
04***25	Key, Plain Woodruff	1
04***12	Ring, Retaining	4
61***20	Ball	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Fuel Supply Pump Lubricator

01***20	Bolt,(For Mono Lever Steering)	3
01***25	Bolt,(Without Rops Guard? Canopy)	1
01***15	Bolt, Fan Mounting	1
01***35	Capscrew	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Head Cover

01***55	Screw	18
62***11	Cover,Rocker Arm Housing	6
62***20	Gasket, Rocker Lever Housing	6

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Head Cover Bolt

01***00	Bolt,(For Front Brake Release)	11
01***55	Bolt,(With Corrosion Resistor)	3
01***60	Bolt	7
01***80	Bolt,(With Corrosion Resistor)	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Heat Shield

01***16	Bolt, Battery To Frame Ground Wire Attaching	2
01***20	Bolt,(For Mono Lever Steering)	2
01***95	Capscrew	1
01***45	Capscrew	5

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Idler Gear

01***45	Washer,(Without R.O.P.S.)	14
04***14	Pin, Dowel	2
04***20	Pin,Dowel (Welded)	12
04***24	Pin,Dowel (For No.3 Housing)	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Muffler

01***16	Bolt, Battery To Frame Ground Wire Attaching	2
01***20	Bolt,(For Mono Lever Steering)	2
01***95	Capscrew	1
01***45	Capscrew	5

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Name Plate (English)(#110001-110001)

DK***00	O-Ring	1
DK***00	Gasket	1
DK***00	Spring,Spring	4
DK***20	Cover	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Name Plate And Caution (English) (Regulation Of Epa)

DK***20	Bolt, Joint	1
DK***20	Housing	1
DK***00	Valve,Check	4
DK***30	Eye,Joint	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Name Plate And Caution Plate (English)

DK***00	O-Ring	1
DK***00	Gasket	1
DK***00	Spring,Spring	4
DK***20	Cover	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Name Plate And Caution Plate (English) (Regulation Of Epa And Eu)

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Oil Cooler

01***30	Bolt,(Not Used When Towing Winch)	6
01***32	Washer,(Not Used With Emergency Str.)	6
62***00	Damper Ass'Y	1
62***00	Damper Ass'Y	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Oil Filter And Piping

61***30	Key Parallel	1
62***00	Bearing Assembly	1
62***10	Main Bearing Assembly	7
62***50	Thrust Bearing Assembly	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Oil Level Gauge

01***25	Bolt,(For Canvas Canopy?Head Guard)	6
01***25	Bolt,(Without Rops Guard? Canopy)	2
01***25	Screw	6
01***16	Washer,(With Water Separator)	6

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Oil Pan And Suction Tube

01***25	Bolt,(For Canvas Canopy?Head Guard)	6
01***20	Bolt,(Without Rops Guard? Canopy)	1
01***25	Bolt,(Without Rops Guard? Canopy)	2
01***25	Screw	6

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Oil Pump

62***10

Support,Front

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Piston

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
01***16	Washer,Radio Controlled Slag Handling	40

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Rocker Arm

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
61***70	Gasket,(With Tachometer Outlet)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Starting Motor (11kw) (Inner Parts)

DK***20	Plunger Ass'Y	1
DK***20	Plunger Block A	6
DK***00	Shim? 0.875mm	0
DK***00	Shim? 0.500mm	0

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Starting Motor Mounting (11kw)

DK***20	Plunger Ass'Y	1
DK***20	Plunger Block A	6
DK***00	Shim? 0.875mm	0
DK***00	Shim? 0.500mm	0

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Tension Pulley

01***25	Bolt,(For Canvas Canopy?Head Guard)	1
01***30	Bolt,(With Body Positioner)	8
01***35	Bolt,(F4320-52a0 -5 )	4
01***40	Bolt (Op)	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Thermostat And Air Vent

01***16	Bolt,(For Slag Handling)	3
01***30	Bolt,(With Body Positioner)	2
01***60	Bolt,(F4320-52a0 -5- )	5
01***50	Bolt,(See Fig.A4010-C3w6)	4

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Turbocharger (Ktr110l-3h4e) (Inner Parts)

01***20	Bolt,(For Mono Lever Steering)	7
01***25	Bolt,(For Canvas Canopy?Head Guard)	2
01***30	Bolt,(With Body Positioner)	1
01***90	Capscrew	3

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Turbocharger And Oil Piping

01***25	Bolt,(For Canvas Canopy?Head Guard)	2
01***35	Bolt,(F4320-52a0 -5 )	3
01***90	Bolt,(For No?1 And No?3 Housing)	1
01***32	Washer,(With Auto Emergency Steering)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Vibration Damper

01***25	Bolt,(For Canvas Canopy?Head Guard)	42
01***30	Bolt,(With Body Positioner)	1
01***50	Bolt,(Spark Arrester Spec.)	2
01***08	Nut, Regular Hexagon (M10-1.50)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Water 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
01***25	Washer,Spring?(Sandy And Dusty Spec.)	4

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Water Pump Gasket Kit

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Wiring (1/3) Switch And Heater

DK***00	Gasket	1
DK***20	Flyweight Ass'Y	1
DK***00	Shim? 2.00mm,(High Altitude Spec.)	0
DK***10	Key? 13mm,Woodruff	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Wiring (2/3) Fuel Injector

DK***00	Gasket	1
DK***20	Flyweight Ass'Y	1
DK***00	Shim? 2.00mm,(High Altitude Spec.)	0
DK***10	Key? 13mm,Woodruff	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : Sa6d140e-2a(S/N 22537-Up) : Engine : Wiring (3/3) Sensor

DK***80	Shim? 0.5mm	0
DK***00	Washer,Spring	1
DK***80	Bolt,Eye	1
DK***00	Screw	1

See all parts with full part numbers in Heavy Parts AI →

SA6D140E-2A(S/N 22537-UP) serial number reference

The PIN plate is located on the front frame casting, typically on the operator's left side near the radiator support. On larger dozers (D155, D275, D375) it may also appear on the inside of the cab door pillar. The prefix is identified by the machine model code (e.g., D155A-3) stamped on the plate, which corresponds to the engine family and serial range.

Prefix	Identifies	Notes
D155A-3	Bulldozer	SA6D140E-2A engine fitted to D155A-3 dozers from serial 60001-Up. This variant uses the SA6D140E-2A engine for serials 22537-Up. Earlier D155A-3 units (prior to 22537) used the S6D140-1Z engine.

Frequently asked questions

What is the engine type and displacement?

The Komatsu SA6D140E-2A is a 15.24-liter (930 cu in), inline-six, water-cooled, turbocharged, and aftercooled 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, has an operating weight of about 49,850 kg (109,900 lb), varying by blade and undercarriage configuration.

What replaced this engine in the D275A-5 line?

Komatsu moved the D275A-5 production to the newer SDA6D140E-3 generation, and 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.

What SA6D140E-2A(S/N 22537-UP) owners discuss

What is the engine configuration and displacement for the Komatsu SA6D140E-2A(S/N 22537-UP)?

The engine is a turbocharged, aftercooled, inline-six diesel with a displacement of 15.2 liters (927 cubic inches). The bore measures 140 mm (5.51 inches). This specific serial range is associated with the 6D140-2 family of engines used in heavy-duty applications such as the D275A-5 dozer and PC1600SP-1 excavator. Variations in power output exist depending on the specific machine application and emissions tier (e.g., Stage II vs. Stage III). varies by configuration/series

What are the common hydraulic behaviors and failure patterns for machines using this engine series?

Operators report that hydraulic weakness often correlates with engine performance. If all functions (boom, arm, bucket, swing, travel) become slow simultaneously, the issue typically lies in the main hydraulic pump, pilot pressure, or engine RPM rather than individual cylinders. A common diagnostic pattern is hydraulics working well when cold but becoming weak when hot, indicating internal leakage in pumps or valves as oil viscosity drops. Dash 6 series machines are noted for specific valve problems, particularly on smaller excavators, but the larger SA6D140E-2A units are generally smooth. If a hydraulic pump fails, the engine may suffer subsequent damage due to the high load. varies by configuration/series

What undercarriage and wear patterns are typical for machines powered by this engine?

Machines in this class (e.g., D275A-5, PC1600SP-1) are designed for heavy mining and quarry work. The undercarriage is subject to rapid wear in abrasive environments. Track tension must be monitored closely as tracks repeatedly loosen under heavy load. Final drives are a common wear point; grinding noises from travel motors often indicate internal gear wear. Komatsu machines are noted for smooth operation, but the line is sometimes criticized for wearing out complete machines simultaneously, affecting resale value. Final drive oil levels and contamination are critical inspection points. varies by configuration/series

What are the common electrical and sensor issues for this engine series?

The engine relies on electronic control systems where a single faulty sensor or unstable power supply can trigger multiple warnings. Common issues include intermittent starting, dashboard failures, and random shutdowns. Specific sensor errors include Charge Air Pressure (CA122/CA123), Coolant Temperature (CA144/CA145), and Rail Pressure (CA451/CA452) faults. Injector circuit errors (CA322-CA332) and ECM internal failures (CA343) are also reported. Alternator malfunction (AB00MA) and low battery charge voltage (AB00KE) are frequent causes of starting difficulties. varies by configuration/series

What should be checked when buying a used machine with the SA6D140E-2A(S/N 22537-UP) engine?

Verify the exact serial prefix and engine model (SA6D140E-2 vs. SDA6D140E-2 vs. SAA6D140E-2) as specifications vary. Check for gray market status, which can complicate parts availability. Inspect the cooling package (radiator, oil cooler, charge-air cooler) for packed debris between heat exchangers. Test hydraulic performance cold and hot to detect internal leakage. Check for fault codes related to the fuel system (water in fuel, feed pump) and turbocharger (speed high/low). Verify the condition of the final drives and undercarriage components. Ensure the battery and charging system are robust, as voltage drops during cranking can mask starter issues. varies by configuration/series

What are the critical cooling system maintenance points for this engine?

The cooling system is prone to overheating in dusty environments. Regularly inspect the radiator, hydraulic oil cooler, and charge-air cooler for blockage. Check coolant level when cold. Monitor fan operation. If the engine overheats during heavy work but cools at idle, the cooling capacity may be marginal. If coolant is expelled or the system becomes pressurized shortly after a cold start, deeper engine diagnosis is required. The thermostat should open at a minimum lift of 8 mm when soaked in oil at 100°C (212°F) and close fully when cooled to 85°C (185°F). varies by configuration/series

What are the safety-critical fixes for engine derating or shutdowns?

Sudden derating or shutdowns are often linked to engine overheat (A000NS), crankcase pressure high (CA555/CA556), or rail pressure errors (CA449/CA559). Check the fuel filter clogging (A570NX) and air cleaner clogging (AA10NX). Inspect the turbocharger speed sensors (CA599/CA687) and EGR valve positions (CA2271/CA2272). Verify the integrity of the KDPF (Diesel Particulate Filter) delta pressure sensors (CA1879/CA1881) if equipped. Have your dealer verify the exact fault codes and perform a pressure test on the fuel and cooling systems to ensure safe operation.

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.

Need a specific SA6D140E-2A(S/N 22537-UP) part?

Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.

Search parts in the app