Komatsuengine(no series)

Komatsu SAA6D140E-3J-1(S/N 111534-UP)

Maintenance schedule, common problems & OEM parts breakdown

Search live SAA6D140E-3J-1(S/N 111534-UP) parts

The Komatsu SAA6D140E-3J-1 engine (S/N 111534-UP) is a 6-cylinder, turbocharged, aftercooled diesel powerplant belonging to the 140-3 series. It serves as the primary power unit for heavy-duty Komatsu machinery, including the D155AX-5 bulldozer, PC750/PC800 series hydraulic excavators, WA500-3 wheel loaders, and HM350-1/HM400-1 articulated dump trucks. The engine is rated at approximately 389 hp (290 kW) net power. It is a water-cooled, direct-injection diesel designed for high-torque applications in mining, quarrying, and heavy earthmoving. The engine's physical dimensions vary slightly by host machine application, with length ranging from 1,446 mm to 1,686 mm and width from 1,262 mm to 2,020 mm depending on the specific chassis mounting and accessory configuration.

The SAA6D140E-3J-1 represents the third generation of Komatsu's 140-series engine family, succeeding the mechanically governed SDA6D140E-2E-9 used in earlier D275A-5 dozers. While the -2E-9 generation was valued for its mechanical simplicity in extreme cold, the -3 series introduced electronic control improvements and enhanced emissions compliance without moving to the larger displacement of the subsequent SAA6D140E-5 generation found in the D275A-5R. In the used and parts market, the SAA6D140E-3J-1 remains critical because it bridges the gap between legacy mechanical systems and modern electronic engines. As factory support shifts toward newer generations, demand for rebuilt injection pumps, turbochargers, and specific -3 series components remains high to maintain the fleet of PC750/PC800 excavators and HM-series dump trucks that are still widely active in heavy production environments.

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 SAA6D140E-3J-1(S/N 111534-UP) specifications

Engine

Model	SAA6D140E-3J-1
Series/Generation	SAA6D140E-3 series
Type	Common rail direct injection, water-cooled, emissionised, turbocharged, after-cooled diesel
Number of Cylinders	6
Bore	4.92 in (125 mm)
Stroke	5.91 in (150 mm)
Piston Displacement	930 in³ (15.2 L)
Aspiration	Komatsu Variable Geometry Turbocharger with air-to-air aftercooler and EGR
Emissions Tier	U.S. EPA Tier 4 Final / EU Stage V

Weights

Operating Weight

92,600 kg (204,144 lb)

Dimensions

Note	Specific transport dimensions (length/width/height) and ground clearance are not documented for the SAA6D140E-3J-1 engine in the provided sources. Operating weight is listed for the PC900 series machine equipped with this engine.

Performance

Engine Power	405 kW @ 1800 rpm
Net Horsepower	543 HP @ 1800 rpm
Bucket Capacity	2.8 - 6.1 m³ (3.66 - 7.98 cu yd)
Maximum Digging Range	17 - 18 m (55.8 - 59.1 ft)

Service capacities (summary)

Note	Specific service capacities (fuel tank, hydraulic system, engine oil, cooling system) are not documented for the SAA6D140E-3J-1 engine in the provided sources.

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

Komatsu SAA6D140E-3J-1(S/N 111534-UP) maintenance schedule

Service interval	Tasks
Every 10 h	Check engine oil level and top up with the 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 SAA6D140E-3J-1(S/N 111534-UP) beyond the schedule

Predictive Maintenance & Fluid Analysis

Run scheduled engine oil sampling on the SAA6D140E-3J-1 to catch wear-metal trends before the electronically governed injection pump or turbocharger bearings fail. Track soot loading and iron/copper counts against baseline. Monitor coolant freeze point and corrosion-resistor cartridge condition closely, especially if the machine operates in cold regions. Log fuel filter differential pressure to predict injection pump wear. Use KOWA fluid analysis at every major service interval to monitor engine and hydraulic health, analyzing samples for wear metals like iron or copper, as well as contaminants such as silicon or sodium.

Corrective & Common Repairs

Typical corrective work on this engine centers on the electronic governor and injection pump linkage, turbocharger seal seepage, and cracked or loose air intake ducting from constant thermal cycling. Corrosion resistor cartridge neglect leads to internal coolant passage pitting in the block and head. Fan belt and mounting isolator failure is common due to repeated cold starts. Inspect the turbocharger for oil seepage at the compressor and turbine seals at every 500-hour interval. Check engine mounting bolts and isolators for looseness. Re-torque cylinder head bolts to specification if overheating symptoms appear.

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. 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. Rebuild the turbocharger core assembly, replacing wear-prone bearings and seals. Check the water pump and thermostat for wear and correct opening temperature.

Seasonal & Environment Servicing

For -50°C specifications, inspect the cold-start aid circuit (intake heater or ether-assist system) at every 2,000-hour interval. Test coolant freeze-point protection ahead of continued cold-region service. Check the corrosion resistor cartridge sight glass on the coolant circuit and replace the element if discolored. Drain water and sediment from the fuel tank and fuel pre-filter/water separator daily. Inspect fan belt tension and condition for cracking from repeated cold starts. Check turbocharger intake ducting and clamps for looseness or cracks. Use Komatsu Genuine diesel engine oil (EO series) with the viscosity grade specified for the operating climate.

SAA6D140E-3J-1(S/N 111534-UP) common service parts

Part number	Part	Notes
07281-00197	Clamp,(With Pre-Fuel Filter)	Fuel system service	Check fitment →
6217-71-6210	Head,Fuel Filter	Fuel system service	Check fitment →
ND092220-0040	Filter,Fuel	Fuel system service	Check fitment →
600-211-1340	Cartridge, Oil Filter	Lubrication service	Check fitment →
6162-53-5430	Packing,Oil Filter And Piping	Lubrication service	Check fitment →

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SAA6D140E-3J-1(S/N 111534-UP) fault codes & troubleshooting

Code	Meaning	Likely cause	What to do
CA111	Engine Controller Internal Fault	ECM hardware failure or internal logic error.	Replace or reprogram the ECM.
CA115	Engine Crankshaft Speed Sensor and Backup Speed Sensor Failure	Broken sensor, wiring issue, or connector corrosion.	Replace the speed sensor and verify voltage at the pin connector.
CA441	Battery Voltage Low Error	Weak battery or failing alternator.	Replace the alternator or battery; check the voltage regulator.
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.
CA689	Engine Speed Sensor Fault	Sensor failure or signal loss.	Replace the corresponding sensor or inspect the sensor gap.
AA10NX	Air Cleaner Clogging	Dirty or blocked air filter element.	Replace the air filter.
B@BCNS	Engine Coolant Overheating	Radiator blockage, fan belt failure, or low coolant level.	Check radiator fins, fan belt, and coolant level.
E10	Engine Controller Power Failure	ECM power loss or control drive system circuit malfunction.	Inspect ECM power connections, fuses, or ground wires.

Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.

SAA6D140E-3J-1(S/N 111534-UP) attachments & work tools

Hydraulic Excavator Attachments

The SAA6D140E-3J-1 engine powers the PC750-6, PC750LC-6, PC750-7, PC800-6, and PC800-7 excavator series. Standard work tools include digging buckets with capacities ranging from 2.8 to 6.1 m³ (3.66 to 7.98 cu yd) depending on the specific model variant and material density. Factory configurations include quick coupler systems and auxiliary hydraulic lines for breakers or hammers.

Articulated Dump Truck Attachments

This engine is installed in the HM350-1 and HM400-1 articulated dump trucks. The primary work tool is the standard steel dump body, with optional high-capacity bodies for specific hauling duties. Factory options include rear-view camera systems and specific mounting points for auxiliary lighting or safety guarding.

Wheel Loader Attachments

The WA500-3 wheel loader utilizes the SAA6D140E-3 engine family. Typical work tools include general-purpose buckets with capacities around 3.0 to 4.2 m³ (3.92 to 5.49 cu yd) for aggregate handling. Configurations include quick-attach couplers for rapid tool changes and optional high-flow hydraulic kits for specialized attachments.

Bulldozer Attachments

The D155AX-5 bulldozer uses this engine series. Standard work tools include straight blades and angle blades with capacities varying by configuration. Factory guarding options include side cutters, end bits, and heavy-duty blade guards for abrasive material handling. Ripper attachments are available for rock breaking applications.

Generator Set Attachments

The DCA400SSK generator set utilizes this engine for power generation. The primary 'work tool' is the alternator assembly, with output capacities typically rated around 400 kW. Factory configurations include sound-attenuated canopies and specific mounting brackets for vibration isolation.

All SAA6D140E-3J-1(S/N 111534-UP) assemblies by section

Every catalogued assembly group for the Komatsu SAA6D140E-3J-1(S/N 111534-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Engine

Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : After Cooler (Chassis Mount)(#110003-)

62***00

After Cooler A

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Air Intake Manifold (Extreme Cold Terrain Spec.)

01***30	Bolt	1
01***12	Bolt,(See Fig. K0210-16a0)	2
01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	15
01***30	Bolt - Lower Oil Cooler Outlet Tubemounting	4

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Air Vent (Extreme Cold Terrain Spec.)

01***20	Bolt,(Forwarded Individually Parts)	1
01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	1
01***30	Bolt - Lower Oil Cooler Outlet Tubemounting	1
01***40	Bolt,(Shim 3-Piece)	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Alternator Mounting (75a) (With Non Hardening Pulley) (Extreme Cold Terrain Spec.)

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
01***20	Screw	4

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Camfollower Cover (Extreme Cold Terrain Spec.)

61***30	Washer,(B)	9
61***80	Packing,(Cold Terrain Spec.)	9
62***10	Cover, Camfollower	3
62***71	Screw	9

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Camfollower(#110001-)

04***12	Ring, Retaining	4
61***30	Pin,Dowel	12
61***20	Ball	1
62***10	Cam Follower Assembly	6

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Camshaft(#110001-)

01***20	Bolt (M12-1.75x20)	2
04***25	Key, Plain Woodruff	1
62***12	Camshaft Assembly	1
62***20	Gear, Camshaft (Left Hand)	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Common Rail (Inner Parts)

62***10	Rail Assembly, Common	1
ND***20	Picco Ring	7
ND***40	Limiter Assembly, Fuel Pressure	1
ND***30	Limiter Assembly, Fuel Flow	6

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Cooling Fan(#110014-)

01***25	Bolt,(For Canvas Canopy?Head Guard)	6
60***50	Fan, Suction	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Corrosion Resistor (Extreme Cold Terrain Spec.)

01***95	Capscrew	1
01***30	Bolt,(Water Separator Spec.)	1
01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	1
01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	4

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Crank Pulley (Extreme Cold Terrain Spec.)

04***24	Pin,Dowel (For No.3 Housing)	1
04***66	V-Belt,(For Freon Compressor)	1
62***20	Bolt	6
62***20	Pulley,Non Hardening	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Crankshaft(#110001-)

04***28	Pin, Dowel - Transmission Case, Pin-Dowel	1
61***30	Key Parallel	1
62***00	Bearing Assembly	1
62***10	Main Bearing Assembly	7

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Cylinder Block Cover And Oil Filler (Extreme Cold Terrain Spec.)

01***20	Bolt,(For Quick Shift) (Mitsubishi)	1
01***50	Bolt,(Spark Arrester Spec.)	12
01***30	Bolt,(Not Used When Towing Winch)	4
01***14	Bolt - Fuel Sensor Mounting	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Cylinder Block Gasket Kit(#110003-)

07***60	O-Ring,(For Pc750?800?1800) (A2610)	1
07***25	O-Ring,Corrosion Resistor	1
07***50	O-Ring,Front Cover Plate	1
07***42	O-Ring,(See Fig.A3310)	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Cylinder Block(#110001-)

01***25	Screw	12
01***45	Washer,(Without R.O.P.S.)	14
01***32	Washer, (Without Emergency Steering)	12
04***14	Pin, Dowel	2

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Cylinder Head Gasket Kit(#110003-)

02***75	O-Ring,(See Fig.A1310)	2
07***25	O-Ring,(For Pc1800e-6)(See Fig.A3110)	6
07***11	O-Ring,(See Fig.A4210)	6
07***15	O-Ring,(See Fig.A4030)	6

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Cylinder Head(#110150-)

01***20	Bolt (M10-1.75x120)	6
01***45	Washer, Spring	36
07***25	O-Ring,(For Pc1800e-6)(See Fig.A3110)	1
07***08	Plug (Kit)	2

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Engine Mounting (Extreme Cold Terrain Spec.)

01***50	Capscrew	8
01***15	Bolt	7
01***23	Washer, Flat	7
01***45	Washer,(For Travel Motor) (Not Show)	8

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Exhaust Manifold(#110003-)

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

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Fan Drive (Extreme Cold Terrain Spec.)

01***16	Bolt,(For Slag Handling)	6
01***20	Bolt, Wiring Harness Mounting Bracket	2
01***95	Capscrew - M12	2
01***25	Bolt	3

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Fan Pulley And V-Belt (Extreme Cold Terrain Spec.)

01***85	Bolt,(For Reversible Fan)	6
04***60	V-Belt Set	1
62***90	Pulley,Non Hardening	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Flywheel (Extreme Cold Terrain Spec.)

56***81	Bearing,Ball	1
61***51	Gear, Ring	1
62***50	Bolt	6
62***0A	Flywheel Ass'Y	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Flywheel Housing (Extreme Cold Terrain Spec.)

01***45	Capscrew - M16	8
01***65	Capscrew	2
01***10	Bolt - Relay And Flasher Mounting	1
01***16	Bolt - Starting Motor Ground Cable	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Front Cover Mounting And Breather (Extreme Cold Terrain Spec.)

01***75	Bolt - Tube Mounting	1
01***90	Bolt,For Weight Adjusting Bolt	3
01***16	Bolt, Mounting Transmission Control Switch	2
01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	6

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Front Cover(#110014-)

07***16	Plug, Expansion	3
62***11	Cover,Front	1
67***21	Seal? Front,(See Fig.A2040)	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Fuel Control (Chassis Mount)(#110812-)

78***03

Controller

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Fuel Filter (Extreme Cold Terrain Spec.)

01***40	Screw	1
01***16	Bolt - Starting Motor Ground Cable	1
01***30	Bolt - Lower Oil Cooler Outlet Tubemounting	4
01***35	Bolt, Mount Bracket To Floor	3

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Fuel Injector(#110001-)

01***10	Bolt - Relay And Flasher Mounting	6
01***35	Bolt	6
01***70	Bolt	6
07***11	O-Ring,(See Fig.A4210)	6

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Fuel Pump Supply And Return Piping (Extreme Cold Terrain Spec.)

01***30	Bolt,See Fig. K4010-17a0	4
01***35	Bolt	2
01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	1
01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Fuel Return(#110003-)

01***16	Bolt - Starting Motor Ground Cable	4
01***60	Bolt - Upper Cooler Inlet Tubemounting	1
01***70	Screw	2
01***32	Washer,(With Auto Emergency Steering)	2

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Fuel Supply Pump (Feed Pump) (Inner Parts)

ND***70	Washer,Union	6
ND***10	Spring, Check Valve	2
ND***42	Screw	1
ND***40	Filter,Fuel	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Fuel Supply Pump (Pump) (Inner Parts)

62***30	Fuel Pump Ass'Y	1
ND***70	Washer,Union	5
ND***60	Screw	1
ND***10	Screw	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Fuel Supply Pump And Common Rail Mounting (Extreme Cold Trrain Spec.)

01***35	Bolt,(F4320-52a0 -5 )	4
01***12	Nut	1
01***32	Washer,(With Auto Emergency Steering)	4
01***60	Flat Washer - M20 (Hardened)	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Fuel Supply Pump Bracket And Connection Cover(#110003-)

01***12	Bolt,(See Fig. K0210-16a0)	4
01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	4
01***20	Bolt - Mount Risers To Cab Floor	2
01***08	Nut,See Fig. K4010-04a0	2

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Fuel Supply Pump Lubricator(#110003-)

07***12	Gasket,(Without Air Compressor Type) (K2)	2
07***10	Screw, Banjo Connector (M10-1.25x20)	1
62***10	Tube, Supply	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Head Cover Bolt(#110001-)

01***55

Screw

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Head Cover(#110001-)

62***10	Cover, Cylinder Head	6
62***20	Gasket,(See Fig.A1110)	6

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Heat Shield(#110014-)

01***40	Capscrew	2
01***16	Bolt - Starting Motor Ground Cable	8
01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	2
01***35	Bolt, Mount Bracket To Floor	4

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Idler Gear(#110001-)

01***30	Bolt - M8 X 30lg	6
61***60	Pin, Dowel	1
61***22	Bolt	1
62***22	Plate, Thrust	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Name Plate (English)(#110003-)

04***50	Screw	4
60***00	Plate,(Limited Supply)	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Oil Cooler(#110001-)

01***20	Bolt, Wiring Harness Mounting Bracket	2
01***30	Bolt - Lower Oil Cooler Outlet Tubemounting	13
01***60	Bolt - Upper Cooler Inlet Tubemounting	2
01***90	Bolt,(For Large Fan)	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Oil Filter And Piping(#110003-)

01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	6
01***35	Bolt, Mount Bracket To Floor	4
01***95	Bolt,(For Shipping)	1
04***11	Clip,(Sand And Dusty Spec.)	2

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Oil Level Gauge

01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	1
01***08	Nut,See Fig. K4010-04a0	1
04***10	Clip	1
61***20	Collar	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Oil Pan And Suction Tube (Extreme Cold Terrain Spec.)

01***25	Bolt,(For Canvas Canopy?Head Guard)	2
01***30	Bolt,(With Body Positioner)	1
01***12	Bolt,(See Fig. K0210-16a0)	3
01***16	Bolt - Starting Motor Ground Cable	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Oil Pump(#110001-)

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***32	Washer,(Not Used With Emergency Str.)	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Piston(#110001-)

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

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Rocker Arm(#110001-)

01***08	Nut,R.H. Thread	2
01***32	Washer, (Without Emergency Steering)	6
04***14	Pin, Dowel	18
04***17	Ball,Detent	2

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Starting Motor Mounting (11kw) (Extreme Cold Terrain Spec.)

01***16	Bolt - Starting Motor Ground Cable	2
08***19	Band,(Without Air Conditioner)	2
08***10	Bracket, Bucket Position Sensor	2
60***40	Starting Motor Ass'Y,R.H. (11kw)	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Thermostat And Water Connector

01***30	Bolt,(Not Used When Towing Winch)	2
01***16	Bolt - Starting Motor Ground Cable	2
01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	3
01***30	Bolt - Lower Oil Cooler Outlet Tubemounting	4

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Turbocharger (Ktr110l-585e) (Inner Parts)(#110014-)

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

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Turbocharger And Oil Piping(#110014-)

01***16	Bolt - Starting Motor Ground Cable	1
01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	2
01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	3
01***35	Bolt, Mount Bracket To Floor	3

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Vibration Damper(#110014-)

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

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Water Pump (Extreme Cold Terrain Spec.)

01***80	Bolt (M10-1.50x80)	1
01***95	Bolt,(For Shipping)	3
01***30	Bolt	3
01***80	Bolt (M10-1.50x80)	3

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Water Pump Gasket Kit(#110003-)

02***37	O-Ring,(For Pc750?1800) (A5010)	2
07***45	O-Ring,(F4320-61a0 -16 ), O-Ring; Was 07000-02145	1
07***70	O-Ring,(For Pc1800e-6)(See Fig.A2041)	1
07***15	O-Ring,(F4320-57a0 -11 )	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Wiring (1/3) Switch And Heater (Extreme Cold Terrain Spec.)

01***14	Bolt,(W/Joy Stick Str.)(W/O Heater)	2
01***20	Bolt,(Forwarded Individually Parts)	2
01***55	Bolt, Mount Dryer To Bracket And Frame	2
01***75	Bolt	2

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Wiring (2/3) Fuel Injector (Extreme Cold Terrain Spec.)

01***25	Bolt - Relay Mounting	6
01***16	Bolt - Starting Motor Ground Cable	1
04***10	Clip,(With Accumulator)	1
04***10	Clip	1

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Komatsu : Saa6d140e-3j-1(S/N 111534-Up) : Engine : Wiring (3/3) Sensor (Extreme Cold Terrain Spec.)

01***16	Bolt - Starting Motor Ground Cable	6
01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	1
01***20	Bolt	2
04***10	Clip - Fuel Sensor Harness	1

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SAA6D140E-3J-1(S/N 111534-UP) serial number reference

The engine serial number is stamped on the engine block, typically on the left side near the injection pump or on a data plate near the valve cover. The prefix is the engine model code (e.g., SAA6D140E-3J-1), which identifies the specific engine generation and configuration, distinct from the machine's chassis serial number.

Prefix	Identifies	Notes
SAA6D140E-3J-1	Engine Model	Komatsu SAA6D140E-3J-1 engine. Serial range 111534-UP. Source: published references catalog listing for SAA6D140E-3J-1 S/N 111534-UP. No other prefixes explicitly tied to this specific engine serial range in the provided text. Other variants like SAA6D140E-3J-8 or SAA6D140E-3B appear in general engine lists but are not confirmed for this specific serial range in the source text.

Frequently asked questions

What is the engine type and configuration?

The Komatsu SAA6D140E-3J-1 is a 6-cylinder, water-cooled, turbocharged, and aftercooled diesel engine. It belongs to the 140-3 series and is electronically governed. It is used in heavy-duty Komatsu machinery such as the D155AX-5 bulldozer, PC750/PC800 excavators, WA500-3 wheel loaders, and HM350-1/HM400-1 articulated dump trucks.

What is the operating weight of the host machines?

Operating weight varies by configuration and series. The D155AX-5 bulldozer weighs approximately 49,850 kg (109,900 lb). The PC750/PC800 excavators and WA500-3 wheel loaders have weights that vary by configuration, serial range, and attachment package. Always consult the specific machine's operation and maintenance manual for precise operating weight data.

What engine replaced the SAA6D140E-3 series?

Komatsu 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 SAA6D140E-3 series, including the SAA6D140E-3J-1, represents the generation prior to this larger-displacement upgrade.

What SAA6D140E-3J-1(S/N 111534-UP) owners discuss

What are the known powertrain and hydraulic behaviors for the Komatsu SAA6D140E-3J-1 engine series?

The SAA6D140E-3 series is a six-cylinder, turbocharged, aftercooled diesel engine. It is commonly found in PC750-6, PC750LC-6, PC750-7, PC800-6, PC800-7, and PC1800-6 excavators. Community consensus notes that Komatsu hydraulic systems are smooth and fuel-efficient. A critical diagnostic pattern is distinguishing between engine power loss and hydraulic load. If engine RPM drops heavily when hydraulics are used, the hydraulic system may be placing excessive load on the engine or the engine may be unable to produce expected power. If engine speed remains normal but movements become weak, the hydraulic system is the primary suspect. Hydraulics that work cold but become weak when hot indicate internal leakage in pumps, main control valves, or motors, as viscosity decreases with heat. Dash 6 machines are noted to have had valve problems, particularly on smaller models, though the SAA6D140E-3 is used in larger excavators where pump and valve combinations have undergone significant updates and redesigns over time. The line is described as durable, but if a hydraulic pump fails, the engine may be at risk due to the interconnected nature of the powertrain. Always verify exact serial-prefix specifications as configurations vary by machine model and regional emissions packages.

What undercarriage or wear patterns are typical for machines using this engine type?

Machines equipped with the SAA6D140E-3 engine, such as the PC750 and PC800 series excavators, operate in heavy earthmoving and mining applications. Typical wear patterns include undercarriage component fatigue, track-chain elongation, and roller wear due to continuous load and dust exposure. The undercarriage is designed to wear out the complete machine over time rather than individual components failing in isolation. Track tension should be monitored regularly, as repeated loosening often indicates adjuster or component wear. Mud or debris packed into the undercarriage can cause uneven wear and pulling to one side. When testing travel speed, compare forward and reverse directions; if one side remains weak in both directions, it points to hydraulic or final-drive issues rather than mechanical track binding. Ground pressure and transport weight limits are critical for these heavy machines, and operating weight varies by configuration, counterweight, and track shoe size.

What are the engine quirks per the SAA6D140E-3 series?

The SAA6D140E-3 series is a mechanically governed, pre-electronic engine generation, valued for simplicity and serviceability in remote or extreme-climate operations where diagnostic support is limited. A known quirk is the reliance on the woodruff key to secure the fuel pump drive gear to the shaft; improper alignment or missing keys during pump replacement can prevent the engine from running. The engine uses a Komatsu KTR110L turbocharger. Cooling system performance is critical; machines may show marginal cooling capacity where temperature rises during heavy work but falls during idle. If coolant is repeatedly expelled or the system becomes highly pressurized shortly after a cold start, deeper engine diagnosis is required. The engine displacement is approximately 14.0 liters (854 cubic inches). Fuel system integrity is vital; air entering the fuel supply or clogged water separators can cause starting issues or power loss under load. Always align the fuel pump to the mark on the cam gear according to factory specifications during reassembly.

What are common electrical or sensor issues reported for this engine?

Komatsu excavators rely heavily on electronic control systems, and a single faulty sensor or unstable power supply can trigger multiple warning signals. Common electrical issues include intermittent starting, dashboard failure, and machines that randomly shut down. Fault codes related to the engine controller power failure (E10), engine control failure (E11), and engine sensor malfunction (E15) are reported. E15 specifically covers temperature and fuel sensors. Unstable battery voltage can cause the display to dim heavily or voltage to collapse during starting, leading to false diagnostics. Ground connections between the engine and chassis must be checked, as poor grounds can mimic sensor failures. When multiple fault codes appear, the battery, grounds, and connectors should be the first items investigated. Always identify the exact machine and serial range before using service specifications, as electrical systems and control strategies are model-specific.

What should be checked when buying a used machine with the SAA6D140E-3J-1 engine?

When buying a used machine with the SAA6D140E-3J-1 engine, verify the exact serial-prefix specification sheet and installed attachment package, as these change weight, reach, and fuel use. Check the hydraulic system for cold versus hot performance; weak hydraulics when hot indicate internal leakage. Inspect the undercarriage for track tension, roller condition, and chain wear. Test travel speed in both forward and reverse to identify side-specific hydraulic or final-drive issues. Check the cooling package for debris packed between heat exchangers. Verify the fuel system for air leaks, water in the separator, and proper fuel filter condition. Inspect the engine for oil leaks, particularly around the oil pan and cylinder head. Check for fault codes related to the engine controller and sensors. Confirm the history of hydraulic pump and valve maintenance, as Dash 6 machines had known valve problems. Parts availability for gray market or older models can be difficult, so ensure access to service manuals and parts books. Have your dealer verify the engine serial number and machine model year against factory records.

What are the recommended fluid specifications for this engine?

Komatsu recommends using Komatsu Genuine fluids for optimal performance. For the diesel engine, use Komatsu EO (Engine Oil) or equivalent high-quality diesel engine oil meeting Komatsu specifications. For the hydraulic system, use Komatsu TO (Transmission and Hydraulic Oil) or HO (Hydraulic Oil) as specified in the operation and maintenance manual. Coolant should be Komatsu Super-coolant AF-NAC or equivalent extended-life coolant. Always consult the specific operation and maintenance manual for the machine model to confirm the exact fluid type and capacity, as these vary by configuration and regional specifications.

What is the safety-critical fix for engine starting issues related to the fuel pump?

If the engine will not start after fuel pump replacement, verify that the woodruff key is correctly installed to secure the fuel pump drive gear to the shaft and that the pump is aligned to the mark on the cam gear according to Komatsu specifications. Incorrect alignment or a missing key will prevent proper fuel delivery. Have your dealer verify the timing and alignment before attempting to start the engine to avoid damage.

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

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