Komatsuengine(no series)

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

Maintenance schedule, common problems & OEM parts breakdown

The Komatsu S6D102E-1W-PT (S/N 26200929-UP) is a six-cylinder in-line diesel engine powering the WA180PT-3 wheel loader series. This machine class falls within the mid-size wheel loader category, typically weighing between 16,000 and 18,000 lbs depending on configuration. Production for the WA180PT-3 series spans the late 1990s through the early 2000s. The engine delivers approximately 130 hp and is part of Komatsu's 102 series lineage, succeeding earlier 100-series designs and preceding the Tier 4-compliant SAA6D102E-2. Configurations offered include standard and PT (Power Train) variants for agricultural and construction use.

Across the 102 series generations, the primary change was the transition from mechanical injection to electronic control and the addition of intercooling in later variants like the SAA6D102E-2. The S6D102E-1W-PT remains significant in the used market due to its robust mechanical simplicity and widespread use in the WA180 and WA250 loader lines. Its availability in the parts market is high because these machines are still active in agriculture and light construction, driving demand for reliable, cost-effective replacement components.

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-PT(S/N 26200929-UP) specifications

Engine

ModelS6D102E-1W-PT
Series102 Series
Configuration6 cylinder in-line turbo diesel
Displacement5.9 L (359 cu in)
Bore102 mm (4.02 in)
Stroke120 mm (4.72 in)
Power134–157 kW (180–210 hp) @ 2500 rpm
Torque420–450 N·m (310–330 lb·ft) @ 1500 rpm
Compression Ratio16.5:1

Weights

Engine Weight466 kg (1025 lb)

Dimensions

Engine Length1067 mm (42 in)
Engine Width711 mm (28 in)
Engine Height894 mm (35 in)

Performance

Application ContextKomatsu WA180PT-3 Wheel Loader, WA250-3PT Wheel Loader

Service capacities (summary)

Fluid SpecificationsKomatsu EO, TO, AXO, HO; Super-coolant AF-NAC

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

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

Service intervalTasks
Every 10 h
  • Check engine oil level
  • Check hydraulic fluid level
  • Check coolant level and secure cap
  • Drain water from fuel separator
  • Check air filter restriction indicator
  • Inspect hydraulic hoses and pins
Every 250 h
  • Change engine oil and filter
  • Grease all pivot points
  • Check fluid levels
  • Inspect belts and hoses
  • Check air filter element
  • Visual walk-around inspection
Every 500 h
  • Replace fuel filter
  • Replace hydraulic return filter
  • Test battery and alternator
  • Test coolant SCA
  • Collect KOWA oil sample
  • Measure undercarriage wear
Every 1,000 h
  • Replace hydraulic oil sample
  • Change final drive oil
  • Inspect turbocharger
  • Check valve adjustment
  • Inspect structural welds
  • Replace air filter outer element
Every 2,000 h
  • Change hydraulic oil
  • Flush and replace coolant
  • Service transmission
  • Evaluate components comprehensively
  • Check KDPF (if equipped)
  • Inspect all belts and clamps

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

Predictive Maintenance & Fluid Analysis

Utilize KOWA fluid analysis at every 500-hour interval to monitor wear metals and contamination. Check the air filter restriction indicator daily to prevent turbocharger strain. Monitor coolant SCA levels at 500 hours to ensure corrosion protection. Inspect the fuel water separator daily to protect the injection pump. Track hydraulic oil particle count to predict pump and valve wear. Use KOMTRAX telematics to identify load spikes that accelerate fluid degradation.

Corrective & Common Repairs

Address excessive exhaust smoke by inspecting the fuel injection pump timing and injector nozzles. Replace worn piston rings if blow-by increases or oil consumption rises. Repair hydraulic leaks by inspecting hose clamps and O-rings at the 1000-hour service. Check the turbocharger rotor play during the 1000-hour inspection. Replace the fuel filter if the engine stalls or loses power under load. Inspect the alternator belt for cracks and tension at every 250-hour service.

Overhaul & Rebuild Points

Plan for an inframe overhaul when compression drops below specification or oil consumption exceeds limits. Replace cylinder liners and pistons during a full rebuild if block wear is detected. Inspect the crankshaft main and rod bearings for scoring or excessive clearance. Check the camshaft lobes and rocker arms for wear during disassembly. Replace the turbocharger if shaft play exceeds limits or housing is damaged. Rebuild the fuel injection pump if output is uneven or timing is inaccurate.

Seasonal & Environment Servicing

In cold weather, use low-viscosity engine oil and ensure the coolant mixture provides adequate freeze protection. Check the battery electrolyte level and charge state more frequently in winter. In dusty environments, clean the radiator and oil cooler fins daily to prevent overheating. Inspect the air filter inner element more often in high-dust conditions. Drain the fuel water separator daily in humid climates to prevent microbial growth. Verify the operation of the heater and defroster in the cab for operator safety.

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

Part numberPart
07281-00197Clamp,(With Pre-Fuel Filter)Check fitment →
6732-71-6111Filter, Fuel - SecondaryCheck fitment →
600-181-6740Element Assembly, Innner And Outer Air CleanerCheck fitment →
6732-21-5530Cartridge, Engine Oil FilterCheck fitment →
6735-51-5141Filter, Lubrication OilCheck fitment →

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

S6D102E-1W-PT(S/N 26200929-UP) fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
CA115Engine crankshaft speed sensor and backup speed sensor failureFaulty speed sensor, broken wiring harness, or corroded connector at the pin connectorReplace the speed sensor and verify voltage at the pin connector
CA451Common rail pressure sensor feedback value too highMalfunctioning rail pressure sensor or actual overpressure condition in the fuel systemDiagnose the fuel rail pressure sensor or check pump lines for blockage
CA122Intake air pressure sensor feedback voltage too highFaulty intake pressure sensor or wiring issueVerify the intake pressure sensor operation and inspect wiring integrity
CA123Intake air pressure sensor feedback voltage too lowSensor short circuit or airflow restriction in the intake systemCheck for a sensor short or inspect for airflow restrictions
CA441Battery voltage too lowWeak battery, failing alternator, or loose connectionsReplace the alternator or battery and check the voltage regulator
CA442Battery voltage too highAlternator overcharging or voltage regulator failureReplace the alternator or battery and check the voltage regulator
CA234Engine overspeedIncorrect throttle calibration, engine load cycle issues, or operator misuseVerify throttle calibration and review engine load cycles
CA111Internal engine controller faultCritical internal failure of the Electronic Control Module (ECM)Replace or reprogram the ECM
AA10NXAir cleaner cloggingDirty or blocked air filter elementReplace the air filter element
B@BCNSEngine coolant overheatingLow coolant level, blocked radiator fins, or fan belt failureCheck radiator fins, fan belt, and coolant level

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

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

Wheel Loader Buckets

The WA180PT-3 and WA250-3PT wheel loaders equipped with the S6D102E-1W-PT engine utilize standard front-end buckets. Factory specifications for the WA250-3PT class list a heaped bucket capacity of 2.5 cu yd (1.91 m³) and a breakout force of 26,983 lbs (120 kN). These machines typically employ a standard pin-on coupler system for quick tool interchangeability.

Bulldozer Blades

The D41E-6 and D41E-6K bulldozers using this engine series are fitted with factory straight or angle dozer blades. The machine class is defined by a flywheel horsepower of 82 kW (110 hp) at 2400 rpm, which dictates the blade width and depth capabilities for standard earthmoving applications.

Motor Grader Blades

The GD405A-3 and GD521A-1E motor graders powered by the S6D102E-1W-PT engine utilize a moldboard blade assembly. The engine's power output supports the hydraulic requirements for the moldboard's tilt, angle, and circle functions, with blade sizes varying by specific model configuration.

Hydraulic Coupler Systems

Attachment mounting relies on the machine's specific frame-mounted quick coupler interface. For the WA180PT-3 and WA250-3PT wheel loaders, the coupler is designed to accept standard bucket pins, with hydraulic lines routed through the machine's frame to power auxiliary circuits for tilt and curl functions.

Hydraulic Kit Arrangements

Work tools requiring auxiliary hydraulics, such as tilt rotators or specialized buckets, utilize the machine's factory-installed auxiliary hydraulic circuits. The S6D102E-1W-PT engine drives the main hydraulic pump, which supplies flow to these circuits; specific flow rates and pressures vary by the loader or grader model configuration.

Engine Guarding Options

Factory configurations for the WA180PT-3 and WA250-3PT include heavy-duty guarding for the engine compartment. This typically involves reinforced radiator screens and debris guards to protect the cooling system and engine components from rock and debris impact during operation in mining and construction sites.

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

Every catalogued assembly group for the Komatsu S6D102E-1W-PT(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-Pt(S/N 26200929-Up) : Engine : Air Cleaner (With Extension Pipe) (Tbg Spec.)(#26227032-)
01***85Screw2
01***25Bolt, Mount Engine Oil Drain To Fuel Tank3
01***30Bolt - Lower Oil Cooler Outlet Tubemounting1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Air Connector(#26204449-)
07***08Plug,(Without Auto Priming System)1
67***10Plug, Pipe (1/2-14 Npt)2
67***20Plug, Pipe (3/4 Nptf)1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Air Intake Heater
67***10Gasket1
67***11Gasket,Air Intake Heater1
67***10Harness, Wiring1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Alternator (50a) (Inner Parts)(#26239268-)
60***10Alternator A. (50a)1
KD***70Bushing,Insulate2
KD***40Bushing,Insulate1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Alternator (50a)(#26239268-)
(6***0)Alternator A. (50a),(See Fig.A601p-02a4z)1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Alternator Mounting (For 35a? 50a Alternator)(#26200936-)
01***30Bolt,(For Trimming Dozer)1
01***10Nut,(Without Air Conditioner)1
01***23Washer,(With Car Heater)3
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Belt Tensioner (Hardening)(#26222494-)
67***40Tensioner,Belt1
67***41Tensioner, Alternator Belt1
67***30Tensioner, Alternator Belt1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Boost Tube(#26237081-)
07***12Gasket,Injection Pump Piping2
67***10Screw, Banjo Connector (M12x1.50x24)1
67***60Adapter, Female1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Breather Hose(#26206731-)
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Camfollower Cover(#26232038-)
67***20Bolt, Mounting (M8-1.25x16)6
67***80Seal, Grommet6
67***60Cover, Push Rod1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Camshaft
67***20Support, Camshaft Thrust1
67***31Gear, Camshaft1
67***60Bolt (M8x1.25x22)2
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Caution Plate (English)(#26255447-)
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Caution Plate (French)(#26255447-)
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Caution Plate (German)(#26222494-26259961)
09***08Plate? Instruction,Air Cleaner1
67***11Plate? Name1
67***60Plate1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Caution Plate (German)(#26255447-)
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Caution Plate(#26216483-)
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Cooling Fan
01***30Bolt - Lower Oil Cooler Outlet Tubemounting6
01***35Bolt, Mount Bracket To Floor4
60***80Fan,Cooling1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Corrosion Resistor(#26222494-)
01***16Bolt, Mount Solenoid Valve1
01***40Bolt,(Shim 3-Piece)2
01***80Bolt (M10-1.50x80)1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Crank Pulley (Air Conditioner Pulley)
01***90Bolt,(For Large Fan)4
67***11Spacer1
67***10Pulley1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Crankshaft
67***50Gear, Crankshaft1
67***11Gear, Crankshaft1
67***10Crankshaft Ass'Y1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Cylinder Block Blind Cover And Fuel Filter Piping
07***12Gasket,Injection Pump Piping2
67***20Bolt, Flange (M8-1.25x20)2
67***10Screw, Banjo Connector (M12x1.50x24)1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Cylinder Block(#26222208-)
62***10Screw1
62***10Seal, O-Ring (M10-1.00)3
67***70Cylinder Block Ass'Y1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Cylinder Head
67***70Head Ass'Y1
67***10Retainer, Exhaust Valve Spring12
67***70Insert, Exhaust6
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Damper
67***20Bolt (M12x1.25x36)4
67***20Damper, Rubber Vibration1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Exhaust Connector Clamp
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Exhaust Manifold Gasket And Bolt(#26201318-)
67***30Bolt, Mounting (M10x1.50x65)12
67***10Gasket, Exhaust Manifold6
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Exhaust Manifold(#26206782-)
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fan Drive Pulley(#26230514-)
67***30Bearing,Roller1
67***30Pulley, Fan1
67***70Bolt, Mounting (M8-1.25x40)4
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Flywheel Housing Plug And Plate(#26264143-26265835)
07***16Gasket,(For Pc750-6) (See Fig.A2110)1
61***90Spacer1
62***80Plug,Drain1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Flywheel Housing Plug And Plate(#26265836-)
01***25Bolt,(With Corrosion Resistor)1
07***16Gasket,(For Pc750-6) (See Fig.A2110)1
61***90Spacer1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Flywheel Housing Plug(#26200929-26264142)
02***13Plug1
61***90Spacer1
63***30Plate1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Flywheel Housing(#26239106-26264142)
67***30Plate, Cover1
67***50Plug, O-Ring1
67***61O-Ring,Bearing Cap1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Flywheel Housing(#26264143-)
02***13Plug1
67***40Cover, Rear1
67***20Bolt (M8-1.25x16)2
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Flywheel(#26200933-)
67***20Washer, Plain (M12)8
67***30Bolt (M12x1.25x32)8
67***80Gear, Flywheel Ring1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Front Cover(#26239106-)
67***11Gasket1
67***40Pin, Timing1
67***50Ring, Retaining1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Front Gear Train Cover(#26200929-26264836)
67***80Gasket, Accessory Drive Cover1
67***10Plate, Accessory Drive Cover1
67***30Bolt, Flange Head (M12-1.75x25)2
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Front Gear Train Cover(#26264837-)
07***10O-Ring,(F4320-67a0 -4 )1
67***30Cover1
67***30Bolt, Flange Head (M12-1.75x25)2
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Front Hanger
01***25Bolt, Mount Engine Oil Drain To Fuel Tank4
67***40Bracket1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Filter
67***40Bolt, (M8x1.25x35)2
67***10Cartridge,Fuel1
67***11Filter, Fuel - Secondary1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Filter Piping(#26204449-)
07***12Gasket,Injection Pump Piping2
67***60Tube, Fuel Supply1
67***70Clamp, Tube1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Hose
01***40Bolt1
01***32Washer,(Not Used With Emergency Str.)1
07***40Hose,See Fig. K4010-05a01
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump (Feed Pump) (Inner Parts)
DK***20Bolt, Joint1
DK***60Feed Pump Ass'Y1
DK***00Valve,Check2
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Inner Parts)
DK***00Shim? 2.00mm,(High Altitude Spec.)0
DK***00Gasket1
DK***40Gasket1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Inner Parts)
DK***00Gasket1
DK***40Gasket,Air Compressor2
DK***00Nut,Cap1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)
67***60Injection Pump Ass'Y1
67***61Injection Pump Ass'Y1
DK***50Pump Ass'Y1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Inner Parts)
DK***40Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-00400
DK***90Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-05900
DK***00Sleeve,Control6
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump And Oil Piping
07***12Gasket,(Without Air Compressor Type) (K2)2
07***10Screw, Banjo Connector (M10-1.25x20)1
61***40Nipple1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump And Oil Piping(#26245702-)
07***12Gasket,(Without Air Compressor Type) (K2)2
07***10Screw, Banjo Connector (M10-1.25x20)1
62***10Seal, O-Ring (M10-1.00)1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump And Oil Piping(#26263525-)
07***12Gasket,(Without Air Compressor Type) (K2)2
07***10Screw, Banjo Connector (M10-1.25x20)1
62***10Seal, O-Ring (M10-1.00)1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump Mounting And Gear(#26200929-26264836)
01***14Bolt - Fuel Sensor Mounting2
01***11Nut (M14-1.50 Thd), Nut; Was 01582-014111
61***61Washer, Plain (14mm)1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump Mounting And Gear(#26264837-)
01***14Bolt - Fuel Sensor Mounting2
01***11Nut (M14-1.50 Thd), Nut; Was 01582-014111
61***61Washer, Plain (14mm)1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Return(#26200929-26231950)
01***16Bolt, Mount Solenoid Valve1
04***08Clip1
07***00Clip2
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Return(#26241074-)
01***16Bolt, Mount Solenoid Valve1
04***08Clip1
61***80Spacer2
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Head Cover(#26206782-)
67***30Bolt (M8x1.25x25)6
67***50Washer, Plain (3/8 Inch)6
67***81Gasket, Valve Cover6
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Heat Shield(#26200929-26257385)
01***20Bolt,(Forwarded Individually Parts)7
01***25Bolt - Relay Mounting4
01***30Bolt,(Water Separator Spec.)2
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Heat Shield(#26257386-)
01***20Bolt,(Forwarded Individually Parts)7
01***25Bolt - Relay Mounting4
01***30Bolt,(Water Separator Spec.)2
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Injection Nozzle
67***40Nozzle1
67***00Nozzle Holder Ass'Y6
67***50Seal, Rectangular Ring6
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Injection Piping(#26241074-)
67***80Seal, Grommet1
67***60Brace, Tube1
67***40Screw, Banjo Connector (M6x1.00x14.3)6
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Muffler And Mounting
01***20Bolt,(Forwarded Individually Parts)2
01***25Bolt - Relay Mounting1
01***25Bolt, Mount Engine Oil Drain To Fuel Tank8
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Oil Cooler And Oil Filter
67***50Valve, Pressure Relief1
67***51Valve, Pressure Relief1
67***30Plug, Pipe (1/8 Nptf)1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Oil Filler
01***30Bolt, Mounting - Front Hand Rails2
61***20Cap Assembly, Oil Fill Tube1
61***80Gasket, Oil Fill Cap1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Oil Pan And Suction Tube (Without Drain Plug)(#26222494-)
09***50Liquid Gasket, Lg-7, 150g0
67***70Plate, Clamping1
67***10Gasket (K2)1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Oil Pan Bolt(#26204449-)
67***60Bolt, Mounting (M8-1.25x25)3
67***10Bolt, Mounting (M8-1.25 X 25)33
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Oil Pan Cover And Oil Gauge
01***12Bolt - Front Cover Mounting3
01***08Washer3
07***23O-Ring,(F4350-61a1b-29 )1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Oil Pressure Switch And Water Temperature Sensor(#26222495-)
07***12Washer, Gasket,(Without Thermo Sensor) (K1)1
08***05Switch,Engine Oil Pressure1
60***61Sensor,Water Temperature1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Oil Pump(#26200939-26273427)
67***10Oil Pump Ass'Y1
67***11Pump, Lubricating Oil1
67***20Bolt (M8x1.25x30)4
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Oil Pump(#26273428-)
67***11Pump, Lubricating Oil1
67***20Bolt (M8x1.25x30)4
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Piston
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Rear Hanger
01***30Bolt, Mounting - Front Hand Rails2
67***20Plate Hanger1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Repair Parts (1/4) (Cylinder Head)
67***40Gasket, Cylinder Head - 0.5mm Os1
67***70Gasket, Cylinder Head - 0.25mm Os1
67***51Gasket? 0.50mm,Head1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Repair Parts (2/4) (Cylinder Block)
67***10Bushing, Oversize (No. 1 Bore)1
67***20Bushing, Oversize (No. 2-5 Bore)1
67***10Sleeve, Salvage - Std Bore6
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Repair Parts (3/4) (Crankshaft)
67***00Main Metal Ass'Y6
67***00Main Metal Ass'Y6
67***00Main Metal Ass'Y6
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Repair Parts (4/4) (Piston)
67***00Piston Ring Ass'Y6
67***00Piston Ring Ass'Y6
67***20Piston? 0.5mm6
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Rocker Arm
67***70Screw, Slotted Set (3/8-24x1 1/2 Inch)2
67***40Bolt6
67***10Rod, Push12
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Safety Relay (Forwarded Individually Parts)(#26269414-)
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Solenoid
01***70Screw1
01***20Bolt,(With Tachometer Outlet)2
01***35Screw1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Spare Parts(#26222494-26268468)
07***16Gasket,(For Pc750-6) (See Fig.A2110)1
67***81Gasket, Valve Cover6
67***10Gasket,Camfollower Cover Bolt6
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Spare Parts(#26268469-)
07***16Gasket,(For Pc750-6) (See Fig.A2110)1
67***81Gasket, Valve Cover6
67***10Gasket,Camfollower Cover Bolt6
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Starting Motor (4.5kw) (Inner Parts)(#26239106-)
60***10Starting Motor Ass'Y,(4.5kw)1
ND***82Yoke Assembly1
ND***00Washer, Felt1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Starting Motor (4.5kw)(#26239106-)
(6***0)Starting Motor Ass'Y,(4.5kw) (See Fig.A621p-02a2)1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Starting Motor Mounting (4.5kw)(#26236989-)
01***35Bolt, Mount Bracket To Floor2
67***11Gasket,Starter1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Starting Motor Mounting(#26200929-26246979)
67***11Gasket,Starter1
67***20Bolt, Mounting (M10x1.50x35)2
67***10Bolt (M10x1.50x35)2
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Tachometer Drive Cover
67***90Cover, Mechanical Tach Drive1
67***20Seal, Rectangular Ring1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Tappet
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Thermostat
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Thermostat Housing
07***25Clip,(For Slag Handling)1
67***40Bolt, (M8x1.25x35)1
67***70Coupling, Plain Hose1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Turbocharger Mounting(#26232773-)
67***10Stud ((M10x1.50 (Both Ends) X42))4
67***20Nut (M10x1.50)4
67***31Kit,Turbocharger1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Turbocharger Oil Piping(#26238406-)
07***59Clamp - Drain Hose2
62***90Gasket,Turbocharger Oil Drain1
67***50O-Ring,Turbocharger Drain1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Under Plate
67***50Plate1
67***51Plate, Cylinder Block Stiffener1
(0***0)Liquid Gasket, Lg-7, 150g0
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Water Connector (With 35a? 50a? 90a Alternator)(#26222494-)
01***05Screw2
07***12Plug,(For Heater-Less)1
67***30Seal,Water Inlet Connection1
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Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Water Connector Elbow(#26222494-)
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Water Connector Plug
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Water Pump (Hardening Pulley)
67***60Bolt (M8x1.25x22)2
67***00Water Pump Ass'Y1
67***01Water Pump Ass'Y1
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S6D102E-1W-PT(S/N 26200929-UP) serial number reference

The 17-character ISO PIN plate is riveted to the right-hand side of the cab on the lower frame, typically just behind the front idler or beneath the operator's window. The traditional model+serial designation is stamped directly into the chassis frame casting on the right-hand side; always cross-check the riveted plate against the engraved frame number.

PrefixIdentifies
WAWheel Loader
PCHydraulic Crawler Excavator
DCrawler Dozer
GDMotor Grader
HMArticulated Dump Truck
PWWheeled Hydraulic Excavator
HDRigid-Frame Mining Dump Truck
BRMobile Crusher / Screener

Frequently asked questions

What engine does the Komatsu WA180PT-3 use?

The Komatsu WA180PT-3 uses the S6D102E-1W-PT six-cylinder in-line diesel engine.

What is the operating weight of the Komatsu WA180PT-3?

The operating weight varies by configuration, typically ranging from 16,000 to 18,000 lbs.

What engine replaced the S6D102E-1?

The SAA6D102E-2 engine replaced the S6D102E-1 in later Komatsu models to meet stricter emissions standards.

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

What are the physical dimensions of the Komatsu S6D102E-1W-PT engine?
The engine measures 1,219 mm (48.0 in) in overall length, 770 mm (30.3 in) in width, and 934 mm (36.8 in) in height. These dimensions apply to the six-cylinder in-line configuration used in this series. varies by configuration/series
What is the net horsepower output for the S6D102E-1 engine in the WA250-3PT wheel loader?
The WA250-3PT wheel loader equipped with the S6D102E-1 engine delivers 97.0 kW (130.1 hp). This rating is specific to the WA250-3PT application.
What is the flywheel horsepower rating for the S6D102E-1 engine in the D41E-6 bulldozer?
The flywheel horsepower for the S6D102E-1 engine in the D41E-6 bulldozer is 82 kW (110 hp) at 2,400 rpm. This rating is specific to the D41E-6 application.
What are the typical undercarriage or wear patterns for machines using this engine series?
Machines using the S6D102E-1 series, such as the PC200-6 and WA180-3, are subject to standard undercarriage wear patterns for their class. Track shoe width, boom length, and attachment packages significantly influence ground pressure and wear rates. Specific wear limits for rollers and idlers vary by configuration/series
What are the common electrical or sensor issues associated with the S6D102E-1 series?
The S6D102E-1 series utilizes standard Komatsu electrical architectures for its era. Common issues involve wiring harness chafing near the turbocharger and exhaust manifold due to heat cycling. Sensor failures typically affect the coolant temperature and oil pressure switches. Electrical layout details are found in the factory wiring schematics. have your dealer verify
What lubricants and coolants are specified for the S6D102E-1 engine and its associated systems?
Komatsu specifies Komatsu EO engine oil, Komatsu TO hydraulic oil, and Komatsu AXO transmission oil. Super-coolant AF-NAC is recommended for the cooling system.
What should be checked when buying a used machine with the S6D102E-1W-PT engine (S/N 26200929-UP)?
Verify the engine serial number plate location on the left side of the engine to confirm the S6D102E-1W-PT designation. Check the fuel injection pump inner parts for wear, as this is a critical component for this series. Inspect the turbocharger shaft play and rotor rotation for signs of bearing failure. Confirm the engine data plate matches the machine serial number range 26200929-UP. have your dealer verify

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

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