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
| Model | S6D102E-1W-PT |
| Series | 102 Series |
| Configuration | 6 cylinder in-line turbo diesel |
| Displacement | 5.9 L (359 cu in) |
| Bore | 102 mm (4.02 in) |
| Stroke | 120 mm (4.72 in) |
| Power | 134–157 kW (180–210 hp) @ 2500 rpm |
| Torque | 420–450 N·m (310–330 lb·ft) @ 1500 rpm |
| Compression Ratio | 16.5:1 |
Weights
| Engine Weight | 466 kg (1025 lb) |
Dimensions
| Engine Length | 1067 mm (42 in) |
| Engine Width | 711 mm (28 in) |
| Engine Height | 894 mm (35 in) |
Performance
| Application Context | Komatsu WA180PT-3 Wheel Loader, WA250-3PT Wheel Loader |
Service capacities (summary)
| Fluid Specifications | Komatsu 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 interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
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 number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 6732-71-6111 | Filter, Fuel - Secondary | 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-PT(S/N 26200929-UP) fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CA115 | Engine crankshaft speed sensor and backup speed sensor failure | Faulty speed sensor, broken wiring harness, or corroded connector at the pin connector | Replace the speed sensor and verify voltage at the pin connector |
| CA451 | Common rail pressure sensor feedback value too high | Malfunctioning rail pressure sensor or actual overpressure condition in the fuel system | Diagnose the fuel rail pressure sensor or check pump lines for blockage |
| CA122 | Intake air pressure sensor feedback voltage too high | Faulty intake pressure sensor or wiring issue | Verify the intake pressure sensor operation and inspect wiring integrity |
| CA123 | Intake air pressure sensor feedback voltage too low | Sensor short circuit or airflow restriction in the intake system | Check for a sensor short or inspect for airflow restrictions |
| CA441 | Battery voltage too low | Weak battery, failing alternator, or loose connections | Replace the alternator or battery and check the voltage regulator |
| CA442 | Battery voltage too high | Alternator overcharging or voltage regulator failure | Replace the alternator or battery and check the voltage regulator |
| CA234 | Engine overspeed | Incorrect throttle calibration, engine load cycle issues, or operator misuse | Verify throttle calibration and review engine load cycles |
| CA111 | Internal engine controller fault | Critical internal failure of the Electronic Control Module (ECM) | Replace or reprogram the ECM |
| AA10NX | Air cleaner clogging | Dirty or blocked air filter element | Replace the air filter element |
| B@BCNS | Engine coolant overheating | Low coolant level, blocked radiator fins, or fan belt failure | Check 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***85 | Screw | 2 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 3 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 1 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Air Intake Heater
| 67***10 | Gasket | 1 |
| 67***11 | Gasket,Air Intake Heater | 1 |
| 67***10 | Harness, Wiring | 1 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Alternator (50a)(#26239268-)
| (6***0) | Alternator A. (50a),(See Fig.A601p-02a4z) | 1 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Belt Tensioner (Hardening)(#26222494-)
| 67***40 | Tensioner,Belt | 1 |
| 67***41 | Tensioner, Alternator Belt | 1 |
| 67***30 | Tensioner, Alternator Belt | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Boost Tube(#26237081-)
| 07***12 | Gasket,Injection Pump Piping | 2 |
| 67***10 | Screw, Banjo Connector (M12x1.50x24) | 1 |
| 67***60 | Adapter, Female | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Breather Hose(#26206731-)
| 07***20 | Clamp, Spring Hose | 1 |
| 07***65 | Hose | 1 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Camshaft
| 67***20 | Support, Camshaft Thrust | 1 |
| 67***31 | Gear, Camshaft | 1 |
| 67***60 | Bolt (M8x1.25x22) | 2 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Caution Plate (English)(#26255447-)
| 09***08 | Plate? Instruction,Air Cleaner | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Caution Plate (French)(#26255447-)
| 09***08 | Plate? Instruction,Air Cleaner | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Caution Plate (German)(#26222494-26259961)
| 09***08 | Plate? Instruction,Air Cleaner | 1 |
| 67***11 | Plate? Name | 1 |
| 67***60 | Plate | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Caution Plate (German)(#26255447-)
| 09***08 | Plate? Instruction,Air Cleaner | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Caution Plate(#26216483-)
| 67***11 | Plate? Name | 1 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Corrosion Resistor(#26222494-)
| 01***16 | Bolt, Mount Solenoid Valve | 1 |
| 01***40 | Bolt,(Shim 3-Piece) | 2 |
| 01***80 | Bolt (M10-1.50x80) | 1 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Crankshaft
| 67***50 | Gear, Crankshaft | 1 |
| 67***11 | Gear, Crankshaft | 1 |
| 67***10 | Crankshaft Ass'Y | 1 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Damper
| 67***20 | Bolt (M12x1.25x36) | 4 |
| 67***20 | Damper, Rubber Vibration | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Exhaust Connector Clamp
| 67***20 | Clamp,Turbocharger Outlet Pipe | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Exhaust Manifold Gasket And Bolt(#26201318-)
| 67***30 | Bolt, Mounting (M10x1.50x65) | 12 |
| 67***10 | Gasket, Exhaust Manifold | 6 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Exhaust Manifold(#26206782-)
| 67***20 | Manifold, Exhaust | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fan Drive Pulley(#26230514-)
| 67***30 | Bearing,Roller | 1 |
| 67***30 | Pulley, Fan | 1 |
| 67***70 | Bolt, Mounting (M8-1.25x40) | 4 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Flywheel Housing Plug And Plate(#26264143-26265835)
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 61***90 | Spacer | 1 |
| 62***80 | Plug,Drain | 1 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Flywheel Housing Plug(#26200929-26264142)
| 02***13 | Plug | 1 |
| 61***90 | Spacer | 1 |
| 63***30 | Plate | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Flywheel Housing(#26239106-26264142)
| 67***30 | Plate, Cover | 1 |
| 67***50 | Plug, O-Ring | 1 |
| 67***61 | O-Ring,Bearing Cap | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Flywheel Housing(#26264143-)
| 02***13 | Plug | 1 |
| 67***40 | Cover, Rear | 1 |
| 67***20 | Bolt (M8-1.25x16) | 2 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Front Cover(#26239106-)
| 67***11 | Gasket | 1 |
| 67***40 | Pin, Timing | 1 |
| 67***50 | Ring, Retaining | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Front Gear Train Cover(#26200929-26264836)
| 67***80 | Gasket, Accessory Drive Cover | 1 |
| 67***10 | Plate, Accessory Drive Cover | 1 |
| 67***30 | Bolt, Flange Head (M12-1.75x25) | 2 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Front Hanger
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 4 |
| 67***40 | Bracket | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Filter
| 67***40 | Bolt, (M8x1.25x35) | 2 |
| 67***10 | Cartridge,Fuel | 1 |
| 67***11 | Filter, Fuel - Secondary | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Filter Piping(#26204449-)
| 07***12 | Gasket,Injection Pump Piping | 2 |
| 67***60 | Tube, Fuel Supply | 1 |
| 67***70 | Clamp, Tube | 1 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump (Feed Pump) (Inner Parts)
| DK***20 | Bolt, Joint | 1 |
| DK***60 | Feed Pump Ass'Y | 1 |
| DK***00 | Valve,Check | 2 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Inner Parts)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Gasket | 1 |
| DK***40 | Gasket | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Inner Parts)
| DK***00 | Gasket | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)
| 67***60 | Injection Pump Ass'Y | 1 |
| 67***61 | Injection Pump Ass'Y | 1 |
| DK***50 | Pump Ass'Y | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Inner Parts)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***00 | Sleeve,Control | 6 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump And Oil Piping
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 2 |
| 07***10 | Screw, Banjo Connector (M10-1.25x20) | 1 |
| 61***40 | Nipple | 1 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Injection Pump Mounting And Gear(#26200929-26264836)
| 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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Return(#26200929-26231950)
| 01***16 | Bolt, Mount Solenoid Valve | 1 |
| 04***08 | Clip | 1 |
| 07***00 | Clip | 2 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Fuel Return(#26241074-)
| 01***16 | Bolt, Mount Solenoid Valve | 1 |
| 04***08 | Clip | 1 |
| 61***80 | Spacer | 2 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Heat Shield(#26200929-26257385)
| 01***20 | Bolt,(Forwarded Individually Parts) | 7 |
| 01***25 | Bolt - Relay Mounting | 4 |
| 01***30 | Bolt,(Water Separator Spec.) | 2 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Injection Nozzle
| 67***40 | Nozzle | 1 |
| 67***00 | Nozzle Holder Ass'Y | 6 |
| 67***50 | Seal, Rectangular Ring | 6 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Injection Piping(#26241074-)
| 67***80 | Seal, Grommet | 1 |
| 67***60 | Brace, Tube | 1 |
| 67***40 | Screw, Banjo Connector (M6x1.00x14.3) | 6 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Muffler And Mounting
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 01***25 | Bolt - Relay Mounting | 1 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 8 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Oil Pump(#26273428-)
| 67***11 | Pump, Lubricating Oil | 1 |
| 67***20 | Bolt (M8x1.25x30) | 4 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Piston
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Rear Hanger
| 01***30 | Bolt, Mounting - Front Hand Rails | 2 |
| 67***20 | Plate Hanger | 1 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Safety Relay (Forwarded Individually Parts)(#26269414-)
| 60***30 | Switch,Starter Relay | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Solenoid
| 01***70 | Screw | 1 |
| 01***20 | Bolt,(With Tachometer Outlet) | 2 |
| 01***35 | Screw | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Spare Parts(#26222494-26268468)
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 67***81 | Gasket, Valve Cover | 6 |
| 67***10 | Gasket,Camfollower Cover Bolt | 6 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Spare Parts(#26268469-)
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 67***81 | Gasket, Valve Cover | 6 |
| 67***10 | Gasket,Camfollower Cover Bolt | 6 |
Komatsu : S6d102e-1w-Pt(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 |
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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Starting Motor Mounting (4.5kw)(#26236989-)
| 01***35 | Bolt, Mount Bracket To Floor | 2 |
| 67***11 | Gasket,Starter | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Starting Motor Mounting(#26200929-26246979)
| 67***11 | Gasket,Starter | 1 |
| 67***20 | Bolt, Mounting (M10x1.50x35) | 2 |
| 67***10 | Bolt (M10x1.50x35) | 2 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Tachometer Drive Cover
| 67***90 | Cover, Mechanical Tach Drive | 1 |
| 67***20 | Seal, Rectangular Ring | 1 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Tappet
| 67***12 | Tappet, Valve | 12 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Thermostat
| 67***20 | Thermostat | 1 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(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 |
Komatsu : S6d102e-1w-Pt(S/N 26200929-Up) : Engine : Water Connector (With 35a? 50a? 90a Alternator)(#26222494-)
| 01***05 | Screw | 2 |
| 07***12 | Plug,(For Heater-Less) | 1 |
| 67***30 | Seal,Water Inlet Connection | 1 |
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
| 67***10 | Plug, Pipe (1/2-14 Npt) | 2 |
Komatsu : S6d102e-1w-Pt(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 |
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.
| Prefix | Identifies | Notes |
|---|---|---|
| WA | Wheel Loader | WA180PT-3 uses S6D102E-1W-PT (S/N 26200929-Up). WA200-1/1A uses 6D105-1BB (S/N 10001-Up) or 6D105-1Z (S/N 62390-Up). WA250-3 uses S6D102E-1 (1997-2003). WA320 uses S6D102E-1. WA600 and larger have rear chassis stamping. |
| PC | Hydraulic Crawler Excavator | PC200-6, PC200LC-6 (A83001-UP, 1995-2002), PC210LC-6, PC220-6, PC220-7, PC230-7, PC240-7, PC270LC-6LE, PC290NLC-6K, PC290LC-6K. PC200-7 uses 6D102 engine. PC200-8 is Dash-8 generation (2007-2013). PC360LC-11, PC490LC-11 are Dash-11 (Stage V). HB215LC-2/-3 are hybrid variants. |
| D | Crawler Dozer | D38E-1, D39E-1 use S6D102E-1. D41-6, D41E-6 (B30001->) use S6D102E-1. D51EX-24, D65PX-18, D85PX-18, D155AX-8, D375A-8. D155, D275, D375 plates may be on cab door pillar. |
| GD | Motor Grader | GD555-3A, GD555-3, GD555-5, GD655-5, GD675-5, GD755-5. GD555-3A uses 6D102 engine. GD555-5, GD655-5 are Dash-5/6 generation. |
| HM | Articulated Dump Truck | HM300-5, HM400-5. Plate on cab pillar; chassis-stamped serial on front frame near front axle. |
| PW | Wheeled Hydraulic Excavator | PW148-11, PW180-11. PW180-7 uses 6D102 engine. Common in European utility/municipal use. |
| HD | Rigid-Frame Mining Dump Truck | HD605-8, HD785-8, HD1500-8. Mining-class haulers. HD1500 and HD605 are off-highway-only. |
| BR | Mobile Crusher / Screener | BR380JG-3, BR580JG-1. Self-propelled jaw/impact crushers. |
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?
What is the net horsepower output for the S6D102E-1 engine in the WA250-3PT wheel loader?
What is the flywheel horsepower rating for the S6D102E-1 engine in the D41E-6 bulldozer?
What are the typical undercarriage or wear patterns for machines using this engine series?
What are the common electrical or sensor issues associated with the S6D102E-1 series?
What lubricants and coolants are specified for the S6D102E-1 engine and its associated systems?
What should be checked when buying a used machine with the S6D102E-1W-PT engine (S/N 26200929-UP)?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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