Komatsuengine(no series)

Komatsu S6D102E-1W-L(S/N 26200929-UP)

Maintenance schedule, common problems & OEM parts breakdown

Search live S6D102E-1W-L(S/N 26200929-UP) parts

The Komatsu S6D102E-1W-L is a six-cylinder in-line diesel engine used in the 102-1 series of heavy construction equipment. It powers the PC200-6 and PC210-6 excavators, the D41E-6 bulldozer, and the WA180-3 wheel loader. Operating weight for these machines ranges from 18,000 kg to 20,500 kg. Production years span approximately 1995 to 2003. The engine succeeded the 6D102 series and preceded the SAA6D102E-2 in the 102-2 series. Configurations included standard, LGP, and high-ground-pressure variants.

The S6D102E-1W-L represents the transition to Tier 3 emissions in the Komatsu 102 series. It matters in the used market because it powers high-volume models like the PC200-6. The engine is known for durability but requires strict adherence to maintenance intervals. Parts availability remains strong due to the large fleet size. The engine is mechanically simple compared to modern Tier 4 engines. This makes it a common target for rebuild and remanufacture.

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 S6D102E-1W-L(S/N 26200929-UP) specifications

Engine

Model	S6D102E-1W-L
Series	102 series
Configuration	Six-cylinder in-line diesel engine
Displacement	5.88 l
Emissions Tier	Not documented for this exact serial range — verify with your dealer

Weights

Operating Weight	Not documented for this exact serial range — verify with your dealer
Shipping Weight	Not documented for this exact serial range — verify with your dealer
Ground Pressure	Not documented for this exact serial range — verify with your dealer

Dimensions

Engine Overall Length	1,219 mm (48.0 in)
Engine Width	770 mm (30.3 in)
Engine Height	934 mm (36.8 in)
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
Dig Depth	Not documented for this exact serial range — verify with your dealer
Lift Capacity	Not documented for this exact serial range — verify with your dealer

Service capacities (summary)

Fuel Tank	Not documented for this exact serial range — verify with your dealer
Hydraulic System	Not documented for this exact serial range — verify with your dealer
Engine Oil	Not documented for this exact serial range — verify with your dealer
Cooling System	Not documented for this exact serial range — verify with your dealer

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

Komatsu S6D102E-1W-L(S/N 26200929-UP) maintenance schedule

Service interval	Tasks
Every 10 h	Check engine oil level and condition Check hydraulic fluid level at sight glass Check coolant level and ensure cap is secure Drain water from fuel separator Check air filter restriction indicator Inspect hydraulic hoses for cracks or leaks
Every 250 h	Change engine oil and replace filter Grease all pivot points on boom, stick, and bucket Check coolant level Inspect drive belts and hoses Check track tension and shoe condition Clear debris from radiator and oil cooler fins
Every 500 h	Replace fuel filter Replace hydraulic return filter Test battery load and clean terminals Test coolant SCA concentration Collect KOWA engine oil sample Measure undercarriage wear
Every 1,000 h	Replace air filter outer element Collect KOWA hydraulic oil sample Change final drive oil Inspect turbocharger Check valve clearance Inspect structural welds on boom and stick
Every 2,000 h	Change hydraulic system oil Flush and replace coolant Change transmission oil and filter Replace worn belts and hoses Comprehensive brake system inspection Check swing machinery oil level

Servicing the S6D102E-1W-L(S/N 26200929-UP) beyond the schedule

Predictive Maintenance & Fluid Analysis

Use KOWA fluid analysis at every 500-hour interval to monitor engine wear. Check coolant SCA concentration at 500 hours to prevent scaling. Inspect the air filter restriction indicator daily. Monitor hydraulic oil particle count at 1000 hours. Track fuel dilution in engine oil samples. Verify turbocharger shaft play during the 1000-hour service. Check final drive oil for metal content at 1000 hours. Analyze transmission oil for oxidation at 2000 hours. Use Komatsu Genuine Lubricants to maintain additive packages. Record all fluid levels during the 10-hour daily check.

Corrective & Common Repairs

Replace the fuel filter at 500 hours to prevent injector damage. Check valve clearance at 1000 hours to maintain compression. Inspect the turbocharger for oil leaks at 1000 hours. Replace worn drive belts at 2000 hours. Check track tension daily to prevent undercarriage wear. Grease all pivot points every 10 hours. Inspect hydraulic hoses for cracks during the 10-hour check. Clean the radiator fins daily to prevent overheating. Check the battery terminals for corrosion at 500 hours. Replace the air filter outer element at 1000 hours.

Overhaul & Rebuild Points

Plan for an inframe overhaul at 10,000 hours. Replace piston rings and liners at 15,000 hours. Check crankshaft journal wear at 10,000 hours. Inspect cylinder head gaskets for leaks during the 2000-hour service. Replace valve guides and seats at 15,000 hours. Check turbocharger bearings for play at 10,000 hours. Inspect the injection pump for wear at 10,000 hours. Check the oil cooler for blockages during the 2000-hour service. Replace the water pump at 10,000 hours. Inspect the engine block for cracks during the overhaul.

Seasonal & Environment Servicing

Check coolant freeze point before winter. Drain water from the fuel separator daily in cold weather. Use lower viscosity engine oil in extreme cold. Check the battery charge level in cold weather. Inspect belts for cracking in hot weather. Clean the radiator fins more frequently in dusty conditions. Check the air filter more often in dusty conditions. Use Komatsu Super Coolant AF-NAC for corrosion protection. Check the hydraulic oil level in hot weather. Inspect the cooling system for leaks before winter.

S6D102E-1W-L(S/N 26200929-UP) common service parts

Part number	Part	Notes
6732-71-6111	Filter, Fuel - Secondary	Fuel system service	Check fitment →
07281-00197	Clamp,(With Pre-Fuel Filter)	Fuel system service	Check fitment →
600-181-6740	Element Assembly, Innner And Outer Air Cleaner	Air intake service	Check fitment →
6732-21-5530	Cartridge, Engine Oil Filter	Lubrication service	Check fitment →
6735-51-5141	Filter, Lubrication Oil	Lubrication service	Check fitment →

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

S6D102E-1W-L(S/N 26200929-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
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
CA122	Intake air pressure sensor feedback voltage too high	Sensor malfunction or wiring issue	Verify the intake pressure sensor and wiring
CA123	Intake air pressure sensor feedback voltage too low	Sensor short or airflow restriction	Check for a sensor short or an airflow restriction
CA111	Internal engine controller fault	ECM internal failure	Replace or reprogram the ECM
CA441	Battery voltage too low	Alternator, battery, or voltage regulator failure	Replace the alternator or battery; check the voltage regulator
CA442	Battery voltage too high	Alternator or voltage regulator failure	Replace the alternator or battery; check the voltage regulator
CA234	Engine overspeed	Throttle calibration error, engine load cycle issue, or operator misuse	Verify throttle calibration, engine load cycle, or operator misuse
CA153	Intake air temperature sensor feedback voltage too high	Sensor malfunction	Replace or test the IAT sensor
CA154	Intake air temperature sensor feedback voltage too low	Sensor malfunction	Replace or test the IAT sensor

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

S6D102E-1W-L(S/N 26200929-UP) attachments & work tools

Excavator Attachments

The S6D102E-1W-L engine (S/N 26200929-UP) powers the PC200-6, PC200LC-6, PC210-6, PC210LC-6, PC220-6, and PC220LC-6 excavator series. These machines utilize standard quick coupler systems compatible with 1.0 to 1.6 m³ (1.3 to 2.1 yd³) digging buckets. Factory guarding options include rock shields and side cutters for high-abrasion applications.

Wheel Loader Attachments

This engine configuration is specified for the WA180-3, WA180PT-3, WA250-3, and WA250PT-3 wheel loader models. Typical work tools include 2.0 to 3.0 m³ (2.6 to 3.9 yd³) general-purpose buckets and specialized rock buckets. Mounting systems are standard Komatsu quick-attach frames designed for rapid tool interchangeability.

Bulldozer Attachments

The S6D102E-1W-L engine is used in the D41E-6 and D41E-6K bulldozer series. Standard equipment includes straight blade (SD) and semi-U (SU) dozer blades. Optional configurations involve heavy-duty side cutters and ripper attachments for soil and rock breaking operations.

Motor Grader Attachments

This engine variant supports the GD405A-3 and GD521A-1E motor grader models. Primary work tools include 3.7 m (12 ft) and 4.0 m (13 ft) moldboard blades. Optional configurations include angle blades and scarifiers for grading and trenching tasks.

Hydraulic System Requirements

Work tools requiring auxiliary hydraulics (such as breakers or mulchers) must utilize the machine's factory-installed auxiliary hydraulic lines and control valves. The S6D102E-1W-L engine provides the necessary hydraulic pump drive to support these attachments without derating engine performance.

All S6D102E-1W-L(S/N 26200929-UP) assemblies by section

Every catalogued assembly group for the Komatsu S6D102E-1W-L(S/N 26200929-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Engine

Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Air Cleaner (With Extension Pipe)

01***85	Screw	2
01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	3
01***30	Bolt - Lower Oil Cooler Outlet Tubemounting	1
01***35	Bolt, Mount Bracket To Floor	2

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Air Connector(#26204449-)

07***08	Plug,(Without Auto Priming System)	1
67***10	Plug, Pipe (1/2-14 Npt)	2
67***20	Plug, Pipe (3/4 Nptf)	1
67***50	Bolt (M8-1.25x90)	2

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Air Intake Heater

67***10	Gasket	1
67***11	Gasket,Air Intake Heater	1
67***10	Harness, Wiring	1
67***20	Heater, Engine	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Alternator (50a) (Inner Parts)(#26239268-)

60***10	Alternator A. (50a)	1
KD***70	Bushing,Insulate	2
KD***40	Bushing,Insulate	1
KD***70	Plate,Terminal	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Alternator (50a)(#26239268-)

(6***0)

Alternator A. (50a),(See Fig.A601p-02a4z)

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Alternator Mounting (For 35a? 50a Alternator)(#26200936-)

01***30	Bolt,(For Trimming Dozer)	1
01***10	Nut,(Without Air Conditioner)	1
01***23	Washer,(With Car Heater)	3
17***60	Spacer,(With Lock-Up)	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Belt Tensioner (With 35a? 50a Alternator)(#26222494-)

67***41	Tensioner, Alternator Belt	1
67***30	Tensioner, Alternator Belt	1
67***20	Bolt (M10x1.50x70)	1
67***40	Tensioner,Belt	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Breather Hose(#26206731-)

07***20	Clamp, Spring Hose	1
07***65	Hose	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Camfollower Cover(#26232038-)

67***20	Bolt, Mounting (M8-1.25x16)	6
67***80	Seal, Grommet	6
67***60	Cover, Push Rod	1
67***60	Gasket, Push Rod Cover	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Camshaft

67***20	Support, Camshaft Thrust	1
67***31	Gear, Camshaft	1
67***60	Bolt (M8x1.25x22)	2
67***80	Key, Plain Woodruff (4.0mm)	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Caution Plate(#26216483-)

67***11

Plate? Name

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Cooling Fan

01***30	Bolt - Lower Oil Cooler Outlet Tubemounting	6
01***35	Bolt, Mount Bracket To Floor	4
60***80	Fan,Cooling	1
62***20	Spacer	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Crank Pulley (Air Conditioner Pulley)

01***90	Bolt,(For Large Fan)	4
67***11	Spacer	1
67***10	Pulley	1
67***20	Spacer	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Crankshaft

67***50	Gear, Crankshaft	1
67***11	Gear, Crankshaft	1
67***10	Crankshaft Ass'Y	1
67***10	Main Metal Ass'Y	6

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Cylinder Block Blind Cover And Fuel Filter Piping

07***12	Gasket,Injection Pump Piping	2
67***20	Bolt, Flange (M8-1.25x20)	2
67***10	Screw, Banjo Connector (M12x1.50x24)	1
67***10	Gasket, Cover Plate	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Cylinder Block(#26222208-)

62***10	Screw	1
62***10	Seal, O-Ring (M10-1.00)	3
67***70	Cylinder Block Ass'Y	1
67***10	Kit, Block Hardware	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Cylinder Head

67***70	Head Ass'Y	1
67***10	Retainer, Exhaust Valve Spring	12
67***70	Insert, Exhaust	6
67***80	Insert, Intake	6

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Damper

67***20	Bolt (M12x1.25x36)	4
67***20	Damper, Rubber Vibration	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Exhaust Connector Clamp

67***20

Clamp,Turbocharger Outlet Pipe

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Exhaust Manifold Gasket And Bolt(#26201318-)

67***30	Bolt, Mounting (M10x1.50x65)	12
67***10	Gasket, Exhaust Manifold	6

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Exhaust Manifold(#26206782-)

67***20

Manifold, Exhaust

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Fan Drive Pulley(#26233057-)

67***30	Bearing,Roller	1
67***70	Bolt, Mounting (M8-1.25x40)	4
67***80	Support Ass'Y	1
67***20	Bearing, Ball	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Flywheel Housing Plug And Plate(#26265836-)

01***25	Bolt,(With Corrosion Resistor)	1
07***16	Gasket,(For Pc750-6) (See Fig.A2110)	1
61***90	Spacer	1
62***80	Plug,Drain	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Flywheel Housing(#26264143-)

02***13	Plug	1
67***40	Cover, Rear	1
67***20	Bolt (M8-1.25x16)	2
67***30	Plate, Cover	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Flywheel(#26200933-)

67***20	Washer, Plain (M12)	8
67***30	Bolt (M12x1.25x32)	8
67***80	Gear, Flywheel Ring	1
67***00	Flywheel Ass'Y	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Front Cover(#26239106-)

67***11	Gasket	1
67***40	Pin, Timing	1
67***50	Ring, Retaining	1
67***60	Screw, Round Head (M5-0.80x17)	2

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Front Gear Train Cover(#26264837-)

07***10	O-Ring,(F4320-67a0 -4 )	1
67***30	Cover	1
67***30	Bolt, Flange Head (M12-1.75x25)	2

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Front Hanger

01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	4
67***40	Bracket	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Fuel Filter

67***40	Bolt, (M8x1.25x35)	2
67***10	Cartridge,Fuel	1
67***11	Filter, Fuel - Secondary	1
67***20	Head	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Fuel Filter Piping(#26204449-)

Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Fuel Hose

01***40	Bolt	1
01***32	Washer,(Not Used With Emergency Str.)	1
07***40	Hose,See Fig. K4010-05a0	1
07***97	Clamp,(With Pre-Fuel Filter)	2

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Fuel Injection Pump And Oil Piping(#26245702-)

07***12	Gasket,(Without Air Compressor Type) (K2)	2
07***10	Screw, Banjo Connector (M10-1.25x20)	1
62***10	Seal, O-Ring (M10-1.00)	1
67***50	Connector, Female	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Fuel Injection Pump And Oil Piping(#26263525-)

07***12	Gasket,(Without Air Compressor Type) (K2)	2
07***10	Screw, Banjo Connector (M10-1.25x20)	1
62***10	Seal, O-Ring (M10-1.00)	1
67***50	Connector, Female	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Fuel Injection Pump Mounting And Gear(#26264837-)

01***14	Bolt - Fuel Sensor Mounting	2
01***11	Nut (M14-1.50 Thd), Nut; Was 01582-01411	1
61***61	Washer, Plain (14mm)	1
67***60	Bolt, Mounting (M8-1.25x25)	2

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Fuel Return(#26231951-)

01***45	Bolt,(Noise Abatement Part)	2
04***08	Clip	1
61***80	Spacer	2
67***20	Bolt, Mounting (M8-1.25x16)	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Head Cover(#26206782-)

67***30	Bolt (M8x1.25x25)	6
67***50	Washer, Plain (3/8 Inch)	6
67***81	Gasket, Valve Cover	6
67***10	Gasket,Camfollower Cover Bolt	6

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Heat Shield(#26257386-)

01***20	Bolt,(Forwarded Individually Parts)	7
01***25	Bolt - Relay Mounting	4
01***30	Bolt,(Water Separator Spec.)	2
01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	2

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Injection Nozzle

67***40	Nozzle	1
67***00	Nozzle Holder Ass'Y	6
67***50	Seal, Rectangular Ring	6
67***60	Gasket,Injector - Spill	2

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Injection Piping(#26231951-)

67***80	Seal, Grommet	1
67***60	Brace, Tube	1
67***40	Screw, Banjo Connector (M6x1.00x14.3)	6
67***60	Gasket,Injector - Spill	12

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Oil Cooler And Oil Filter

67***50	Valve, Pressure Relief	1
67***51	Valve, Pressure Relief	1
67***30	Plug, Pipe (1/8 Nptf)	1
67***20	O-Ring,Oil Pressure Plug	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Oil Filler

01***30	Bolt, Mounting - Front Hand Rails	2
61***20	Cap Assembly, Oil Fill Tube	1
61***80	Gasket, Oil Fill Cap	1
67***70	Filler,Oil	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Oil Pan And Suction Tube (Without Drain Plug)(#26222494-)

09***50	Liquid Gasket, Lg-7, 150g	0
67***70	Plate, Clamping	1
67***10	Gasket (K2)	1
67***30	Bolt, Hex Cap (M8-1.25x30)	2

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Oil Pan Bolt(#26204449-)

67***60	Bolt, Mounting (M8-1.25x25)	3
67***10	Bolt, Mounting (M8-1.25 X 25)	33

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Oil Pan Cover And Oil Gauge

01***12	Bolt - Front Cover Mounting	3
01***08	Washer	3
07***23	O-Ring,(F4350-61a1b-29 )	1
07***16	Gasket,(For Pc750-6) (See Fig.A2110)	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Oil Pressure Switch And Water Temperature Sensor(#26222495-)

07***12	Washer, Gasket,(Without Thermo Sensor) (K1)	1
08***05	Switch,Engine Oil Pressure	1
60***61	Sensor,Water Temperature	1
62***10	Seal, O-Ring (M10-1.00)	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Oil Pump(#26200939-26273427)

67***10	Oil Pump Ass'Y	1
67***11	Pump, Lubricating Oil	1
67***20	Bolt (M8x1.25x30)	4

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Oil Pump(#26273428-)

67***11	Pump, Lubricating Oil	1
67***20	Bolt (M8x1.25x30)	4

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Piston

67***00	Piston Ring Ass'Y	6
67***10	Pin, Piston	6
67***20	Ring, Retaining	12
67***00	Rod, Engine Connecting	6

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Rear Hanger

01***30	Bolt, Mounting - Front Hand Rails	2
67***20	Plate Hanger	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Repair Parts (1/4) (Cylinder Head)

67***40	Gasket, Cylinder Head - 0.5mm Os	1
67***70	Gasket, Cylinder Head - 0.25mm Os	1
67***51	Gasket? 0.50mm,Head	1
67***51	Gasket? 0.15mm,Head	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Repair Parts (2/4) (Cylinder Block)

67***10	Bushing, Oversize (No. 1 Bore)	1
67***20	Bushing, Oversize (No. 2-5 Bore)	1
67***10	Sleeve, Salvage - Std Bore	6

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Repair Parts (3/4) (Crankshaft)

67***00	Main Metal Ass'Y	6
67***00	Main Metal Ass'Y	6
67***00	Main Metal Ass'Y	6
67***00	Thrust Metal Ass'Y	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Repair Parts (4/4) (Piston)

67***00	Piston Ring Ass'Y	6
67***00	Piston Ring Ass'Y	6
67***20	Piston? 0.5mm	6
67***30	Piston? 1.0mm	6

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Rocker Arm

67***70	Screw, Slotted Set (3/8-24x1 1/2 Inch)	2
67***40	Bolt	6
67***10	Rod, Push	12
67***11	Rod, Push	12

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Safety Relay (Forwarded Individually Parts)(#26269414-)

60***30

Switch,Starter Relay

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Solenoid

01***70	Screw	1
01***20	Bolt,(With Tachometer Outlet)	2
01***35	Screw	1
01***70	Bolt	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Starting Motor (4.5kw) (Inner Parts)(#26239106-)

60***10	Starting Motor Ass'Y,(4.5kw)	1
ND***82	Yoke Assembly	1
ND***00	Washer, Felt	1
ND***50	Bushing,Drain	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Starting Motor (4.5kw)(#26239106-)

(6***0)

Starting Motor Ass'Y,(4.5kw) (See Fig.A621p-02a2)

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Starting Motor Mounting (4.5kw)(#26236989-)

01***35	Bolt, Mount Bracket To Floor	2
67***11	Gasket,Starter	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Tachometer Drive Cover

67***90	Cover, Mechanical Tach Drive	1
67***20	Seal, Rectangular Ring	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Tappet

67***12

Tappet, Valve

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Thermostat

67***20

Thermostat

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Thermostat Housing

07***25	Clip,(For Slag Handling)	1
67***40	Bolt, (M8x1.25x35)	1
67***70	Coupling, Plain Hose	1
67***80	Bolt (M8-1.25x70)	2

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Turbocharger Mounting(#26232773-)

67***10	Stud ((M10x1.50 (Both Ends) X42))	4
67***20	Nut (M10x1.50)	4
67***31	Kit,Turbocharger	1
67***10	Gasket, Turbocharger Mounting	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Turbocharger Oil Piping(#26238406-)

07***59	Clamp - Drain Hose	2
62***90	Gasket,Turbocharger Oil Drain	1
67***50	O-Ring,Turbocharger Drain	1
67***70	Tube, Turbocharger Oil Drain	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Under Plate

67***50	Plate	1
67***51	Plate, Cylinder Block Stiffener	1
(0***0)	Liquid Gasket, Lg-7, 150g	0

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Water Connector

67***60	Connection, Water Inlet	1
67***10	Connector	1
67***20	Bolt (M10-1.50x75)	3
67***30	Seal,Water Inlet Connection	1

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Water Connector Elbow(#26222494-)

67***10

Elbow

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Water Connector Plug

67***10

Plug, Pipe (1/2-14 Npt)

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Komatsu : S6d102e-1w-L(S/N 26200929-Up) : Engine : Water Pump (Hardening Pulley)

67***60	Bolt (M8x1.25x22)	2
67***00	Water Pump Ass'Y	1
67***01	Water Pump Ass'Y	1
67***20	Seal, Rectangular Ring	1

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Frequently asked questions

What engine does the Komatsu S6D102E-1W-L use?

It uses the Komatsu S6D102E-1 six-cylinder in-line diesel engine. It is part of the 102-1 series. The engine has a displacement of 5.88 liters. It produces 78 kW of power. The engine is mechanically controlled and does not use electronic fuel injection. It is designed for heavy construction equipment.

What is the operating weight of the Komatsu PC200-6?

The operating weight of the Komatsu PC200-6 is 20,500 kg. This varies by configuration; it can be lower with a short boom or higher with a long boom. The weight also varies by attachment package, counterweight configuration, and undercarriage type.

What replaced the Komatsu S6D102E-1W-L?

The SAA6D102E-2 engine replaced the S6D102E-1. The SAA6D102E-2 is part of the 102-2 series. It was introduced in the PC200-7 excavator. The SAA6D102E-2 meets Tier 3 emissions standards. It uses electronic fuel injection. It has a higher power output. It is used in the PC210-7 and PC220-7 excavators.

What S6D102E-1W-L(S/N 26200929-UP) owners discuss

What are the physical dimensions and basic configuration of the S6D102E-1W-L engine?

The S6D102E-1W-L is a six-cylinder in-line diesel engine. The overall length is 1,219 mm (48.0 in), the width is approximately 770 mm (30.3 in), and the height is approximately 934 mm (36.8 in). The engine block is constructed of iron. This specific engine model is associated with the WA180PT-3 wheel loader for serial numbers 26200929 and up.

What are the known powertrain and hydraulic behaviors associated with this engine series?

The Komatsu line is generally noted for smooth operation and high fuel efficiency. However, community consensus indicates that on Dash 6 machines, hydraulic pump failures are often preceded by engine wear, suggesting the engine may not survive long after a pump failure. This correlation is cited as a primary reason for lower resale values in this machine class. The engine delivers power to the hydraulic system, which drives the loader's lifting and material handling functions.

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

Machines equipped with the S6D102E-1 series, such as the WA180PT-3, are subject to standard undercarriage wear patterns for wheel loaders operating in construction and mining sectors. Community discussions highlight that these machines are designed to wear out complete systems simultaneously, particularly affecting the hydraulic pump and engine components together. Specific undercarriage wear rates vary by configuration and duty cycle.

What are the common engine quirks or maintenance requirements for the 102-1 series?

The S6D102E-1 belongs to the 102-1 series. Maintenance requires strict adherence to Komatsu specifications for engine oil and coolant to prevent overheating and corrosion. The engine utilizes a turbocharger system; excessive exhaust smoke or white smoke generation are key indicators of internal issues requiring immediate investigation. Proper lubrication using Komatsu EO or equivalent heavy-duty diesel engine oil is critical for longevity.

Are there common electrical or sensor issues reported for this engine?

The S6D102E-1 series relies on specific electrical wiring and sensor inputs for operation. While specific sensor failure rates are not detailed in the provided sources, the engine's performance is tied to the hydraulic pump and valve combinations. Electrical faults can manifest as sudden changes in engine output or abnormal sounds. Verification of the engine data plate on the left side of the valve cover is necessary to confirm exact serial ranges and part fitment.

What should be checked when buying a used machine with the S6D102E-1W-L engine (S/N 26200929-UP)?

When inspecting a used WA180PT-3 or similar machine with this engine serial range, verify the engine data plate location on the left side of the valve cover. Check for signs of hydraulic pump failure, as engine damage often follows pump failure in this series. Inspect the turbocharger for rotor play and rotation issues. Ensure the cooling system is free of rust and corrosion, using Komatsu Super-coolant AF-NAC or equivalent. Verify that the engine oil and hydraulic fluid levels are correct and that no leaks are present around the oil cooler and filter assembly.

What are the fluid specifications for this engine?

The engine requires Komatsu EO or equivalent heavy-duty diesel engine oil. The cooling system utilizes Komatsu Super-coolant AF-NAC or a prediluted coolant with frost and rust protection rated for -40°C. Hydraulic systems associated with this engine typically use Komatsu HO or TDTO hydraulic oil. Specific capacities vary by configuration and should be verified against the operation and maintenance manual for the specific machine model.

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

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