Komatsuengine(no series)

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

Maintenance schedule, common problems & OEM parts breakdown

The Komatsu S6D102E-1W-D is a six-cylinder in-line diesel engine powering the WA180-3 Avance Plus wheel loader series. This engine delivers 82 kW (110 HP) at 2400 rpm and is housed in a compact frame measuring 1,219 mm in length, 770 mm in width, and 934 mm in height. The WA180-3 series replaced the earlier WA180-1 and WA180-2 models, serving as a mid-size loader for construction, mining, and agricultural applications. The machine operates within a weight range typical for its class, supporting bucket capacities of 3.0 to 4.2 cubic meters. Configurations included standard, LGP, and PTC variants to suit different ground conditions.

The S6D102E-1W-D represents the transition from the older 6D102 series to the more refined 102E-1 generation, featuring improved fuel injection and turbocharging for better efficiency and emissions compliance. This engine is critical in the used market because it powers the widely distributed WA180-3, a durable workhorse known for smooth operation and fuel economy. Its mechanical simplicity and robust construction make it a preferred choice for independent operators seeking reliable powertrains with accessible parts and straightforward maintenance procedures compared to newer electronic-heavy engines.

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-D(S/N 26200929-UP) specifications

Engine

ModelS6D102E-1W-D
Series/GenerationS6D102E-1 (102 Series)
Displacement5.9 L (359 cu in)
Cylinders6, in-line
Bore102 mm (4.02 in)
Stroke120 mm (4.72 in)
Gross Power134–157 kW (180–210 hp) @ 2500 rpm
Net Power134–157 kW (180–210 hp) @ 2500 rpm
Torque420–450 Nm (310–330 lb-ft) @ 1500 rpm
Emissions TierTier 3 / Stage IIIA

Weights

Engine Weight466 kg (1025 lb)

Dimensions

Engine Length1067 mm (42 in)
Engine Width711 mm (28 in)
Engine Height894 mm (35 in)
Compression Ratio16.5:1

Performance

Flywheel Horsepower82 kW (110 hp) @ 2400 rpm

Service capacities (summary)

Engine OilKomatsu EO or equivalent diesel engine oil
Cooling SystemKomatsu Super-coolant AF-NAC or equivalent
Hydraulic SystemKomatsu HO or equivalent hydraulic oil

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

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

Service intervalTasks
Every 10 h
  • Check engine oil level and condition
  • Check hydraulic fluid level at sight glass
  • Check coolant level and ensure cap is secure
  • Check fuel level and drain water from separator
  • Check DEF level on Tier 4 machines
  • Check air filter restriction indicator
Every 250 h
  • Change engine oil and filter
  • Grease all points including boom, stick, bucket, and swing bearing
  • Check fluid levels across all systems
  • Check air filter element
  • Inspect belts and hoses
  • Perform visual walk-around inspection
Every 500 h
  • Replace fuel filter and drain water separator
  • Replace hydraulic return filter
  • Service battery and test terminals
  • Test coolant SCA concentration
  • Collect KOWA oil sample for analysis
  • Perform detailed undercarriage inspection
Every 1,000 h
  • Replace air filter outer element
  • Collect hydraulic oil sample for KOWA analysis
  • Check final drive oil levels
  • Inspect turbocharger condition
  • Check valve adjustment clearances
  • Perform structural inspection of boom and stick
Every 2,000 h
  • Change hydraulic system oil
  • Flush and replace coolant
  • Change final drive oil on both sides
  • Change swing machinery oil
  • Replace worn belts and hoses
  • Perform comprehensive component evaluation

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

Predictive Maintenance & Fluid Analysis

Utilize the KOWA program to monitor engine oil wear metals and hydraulic fluid cleanliness. Check coolant SCA levels every 500 hours to prevent liner cavitation in the S6D102E-1W-D block. Monitor turbocharger rotor play and inspect the oil cooler for debris clogging. Track fuel consumption trends to detect injector wear early. Use KOMTRAX telematics to identify load spikes that accelerate fluid degradation. Replace the hydraulic return filter at 500-hour intervals to maintain system integrity.

Corrective & Common Repairs

Address white smoke issues by checking fuel injection timing and injector nozzle spray patterns. Replace worn piston rings if blue smoke indicates excessive oil consumption. Inspect the turbocharger shaft for play and replace seals if oil leaks into the intake. Check the alternator and starter motor brushes for wear. Replace the fuel filter if black smoke or hard starting occurs. Inspect the hydraulic pump drive coupling for shear pin damage or misalignment.

Overhaul & Rebuild Points

Plan for an inframe overhaul when compression drops below specification or oil consumption exceeds limits. Measure cylinder bore wear and replace liners if out of tolerance. Check crankshaft journal diameters and replace bearings if clearance exceeds factory specs. Inspect the camshaft lobes and rocker arms for excessive wear. Replace all gaskets and seals during reassembly. Verify valve seat integrity and grind or replace valves as needed.

Seasonal & Environment Servicing

In cold weather, check the coolant freeze point and use lower viscosity oil for easier starting. Clear debris from the radiator and oil cooler fins to prevent overheating in dusty environments. Inspect the air filter restriction indicator frequently and clean the pre-cleaner. In hot conditions, monitor engine temperature gauges and flush the cooling system to remove scale. Grease all pivot points more often in wet or muddy conditions to wash out contaminants.

S6D102E-1W-D(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 →
600-181-6820Element Assembly, OuterCheck fitment →

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

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

CodeMeaningLikely causeWhat to do
CA115Engine crankshaft speed sensor failureFaulty crankshaft speed sensor, broken wiring harness, or corroded connector at the sensor pin.Inspect the sensor wiring and connector for damage or corrosion. Test sensor voltage output. Replace the speed sensor if the signal is absent or erratic.
CA111Internal engine controller faultCritical failure within the Electronic Control Module (ECM) or engine controller internal circuitry.Check ECM power supply and ground connections. If power is stable, the ECM likely requires replacement or reprogramming.
CA451Common rail pressure sensor feedback value too highFaulty rail pressure sensor, actual overpressure condition, or short in the sensor signal circuit.Verify actual rail pressure with a mechanical gauge. Inspect the sensor wiring for shorts. Replace the pressure sensor if the circuit is intact but readings remain abnormal.
CA441Battery voltage too lowWeak or discharged battery, failing alternator, or loose/corroded battery cables.Check battery charge state and terminal connections. Test alternator output voltage. Replace the battery or alternator as needed.
CA122Intake air pressure sensor feedback voltage too highFaulty intake air pressure sensor, shorted signal wire, or actual high boost pressure.Inspect the intake air pressure sensor and its wiring harness. Check for boost leaks or restrictions. Replace the sensor if the wiring is good.
CA123Intake air pressure sensor feedback voltage too lowFaulty intake air pressure sensor, open circuit in the signal wire, or severe airflow restriction.Check the intake air pressure sensor connector for corrosion or disconnection. Inspect the air filter for clogging. Replace the sensor if necessary.
CA234Engine overspeedThrottle calibration error, operator misuse, or malfunctioning fuel control solenoid.Verify throttle calibration and fuel control solenoid operation. Check for mechanical binding in the throttle linkage. Reset throttle parameters if applicable.
AA10NXAir cleaner cloggingClogged air filter element or restricted intake path.Inspect the air filter indicator or replace the air filter element. Ensure the intake path is clear of debris.
B@BCNSEngine coolant overheatingLow coolant level, failed thermostat, blocked radiator fins, or broken fan belt.Check coolant level and top off if low. Inspect the radiator for blockages and the fan belt for tension. Verify thermostat operation.
E10Engine controller power failureLoss of power to the ECM, blown fuse, or open ground wire in the engine control circuit.Inspect the ECM power fuses and relays. Check the main power and ground connections to the engine controller. Repair open circuits as found.

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

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

Wheel Loader Attachments

The S6D102E-1W-D engine (S/N 26200929-Up) powers the WA180-3 series wheel loaders, including the WA180-3 Avance Plus, WA180-3 Avance Plus PTC, and WA180-3L models. Typical bucket capacities for this class range from 1.5 to 2.5 cubic meters, depending on material density and specific loader configuration. Factory guarding options include high-visibility ROPS/FOPS cabs and engine compartment guards for debris protection.

Excavator Attachments

This engine is used in the PC200-6, PC210-6, and PC220-6 series hydraulic excavators. Standard work tools include digging buckets, trenching buckets, and grading buckets with capacities varying by model (e.g., PC200-6 buckets typically range from 0.8 to 1.2 cubic meters). Coupler systems are typically fixed or quick-attach hydraulic couplers compatible with standard ISO mounting patterns for this generation.

Dozer Attachments

The S6D102E-1W-D engine is specified for the D41E-6 and D41E-6K bulldozers. Standard blades include straight (S) and semi-U (SU) dozer blades, with blade widths typically around 3.0 to 3.5 meters. Optional attachments may include angle dozer blades or specialized ripper configurations, though ripper mounting depends on the specific undercarriage and frame configuration.

Hydraulic Kit Requirements

Work tools requiring auxiliary hydraulics (e.g., tilt rotators, hydraulic breakers) require specific hydraulic kit configurations. The WA180-3 and PC200-6 series typically offer single or dual auxiliary hydraulic circuits with standard quick-connect couplers. Factory options may include high-flow hydraulic kits for specialized attachments, but exact flow rates vary by machine configuration and engine output settings.

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

Every catalogued assembly group for the Komatsu S6D102E-1W-D(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-D(S/N 26200929-Up) : Engine : Air Cleaner (With Extension Pipe)
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-D(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-D(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-D(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-D(S/N 26200929-Up) : Engine : Alternator (35a) (Brushless Type) (Inner Parts)(#26200929-26239464)
60***11Alternator A. (35a)1
KD***70Bushing,Insulate1
KD***50Regulator Ass'Y1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Alternator (35a) (Brushless Type) (Inner Parts)(#26239465-)
60***11Alternator A. (35a)1
KD***70Bushing,Insulate1
KD***50Regulator Ass'Y1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Alternator (35a) (Brushless Type)(#26200929-26239464)
(6***1)Alternator A. (35a),(See Fig.A601p-02a7z)1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Alternator (35a) (Brushless Type)(#26239465-)
(6***1)Alternator A. (35a),(See Fig.A601p-02a7z)1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Alternator (50a) (Inner Parts)(#26200929-26239267)
60***10Alternator A. (50a)1
KD***70Bushing,Insulate2
KD***40Bushing,Insulate1
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Komatsu : S6d102e-1w-D(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-D(S/N 26200929-Up) : Engine : Alternator (50a)(#26200929-26239267)
(6***0)Alternator A. (50a),(See Fig.A601p-02a4z)1
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Komatsu : S6d102e-1w-D(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-D(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-D(S/N 26200929-Up) : Engine : Belt Tensioner (Hardening Type)(#26222494-)
67***40Tensioner,Belt1
67***30Tensioner, Alternator Belt1
67***20Bolt (M10x1.50x70)1
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Komatsu : S6d102e-1w-D(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-D(S/N 26200929-Up) : Engine : Breather Hose(#26206731-)
Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Camfollower Cover(#26200929-26232037)
67***20Bolt, Mounting (M8-1.25x16)6
67***80Seal, Grommet6
67***60Cover, Push Rod1
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Komatsu : S6d102e-1w-D(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-D(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-D(S/N 26200929-Up) : Engine : Caution Plate (Arabic)(#26222494-)
09***08Plate? Instruction,Air Cleaner1
67***11Plate? Name1
67***60Plate? Name1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Caution Plate (Chinese)(#26222494-)
09***08Plate? Instruction,Air Cleaner1
67***11Plate? Name1
67***30Plate? Name1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Caution Plate (English)(#26222494-)
Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Caution Plate (English)(#26222494-26259961)
09***08Plate? Instruction,Air Cleaner1
67***11Plate? Name1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Caution Plate (English)(#26255447-)
Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Caution Plate (French)(#26222494-)
09***08Plate? Instruction,Air Cleaner1
67***11Plate? Name1
67***90Plate1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Caution Plate (French)(#26222494-26259961)
09***08Plate? Instruction,Air Cleaner1
67***11Plate? Name1
67***90Plate1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Caution Plate (French)(#26255447-)
Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Caution Plate (German)(#26222494-)
09***08Plate? Instruction,Air Cleaner1
67***11Plate? Name1
67***60Plate1
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Komatsu : S6d102e-1w-D(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-D(S/N 26200929-Up) : Engine : Caution Plate (German)(#26255447-)
Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Caution Plate (Russian)(#26222494-)
09***08Plate? Instruction,Air Cleaner1
67***11Plate? Name1
67***80Plate? Name1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Caution Plate (Russian)(#26222494-26259961)
09***08Plate? Instruction,Air Cleaner1
67***11Plate? Name1
67***80Plate? Name1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Caution Plate (Spanish)(#26222494-)
09***08Plate? Instruction,Air Cleaner1
67***11Plate? Name1
67***40Plate? Name1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Caution Plate (Spanish)(#26222494-26259961)
09***08Plate? Instruction,Air Cleaner1
67***11Plate? Name1
67***40Plate? Name1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Caution Plate(#26216483-)
Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Cooling Fan
01***35Bolt, Mount Bracket To Floor4
01***30Screw6
60***80Fan,Cooling1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Corrosion Resistor(#26222494-)
01***80Bolt (M10-1.50x80)1
01***16Screw1
01***40Bolt2
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Komatsu : S6d102e-1w-D(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-D(S/N 26200929-Up) : Engine : Crankshaft
67***50Gear, Crankshaft1
67***11Gear, Crankshaft1
67***10Crankshaft Ass'Y1
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Komatsu : S6d102e-1w-D(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-D(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-D(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-D(S/N 26200929-Up) : Engine : Damper
67***20Bolt (M12x1.25x36)4
67***20Damper, Rubber Vibration1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Exhaust Connector Clamp
Komatsu : S6d102e-1w-D(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-D(S/N 26200929-Up) : Engine : Exhaust Manifold(#26206782-)
Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Fan Drive Pulley(#26206782-26230513)
67***30Pulley, Fan1
67***70Bolt, Mounting (M8-1.25x40)4
67***20Support Ass'Y,Fan1
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Komatsu : S6d102e-1w-D(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-D(S/N 26200929-Up) : Engine : Flywheel Housing Plug
02***13Plug1
61***90Spacer1
63***30Plate1
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Komatsu : S6d102e-1w-D(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-D(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-D(S/N 26200929-Up) : Engine : Flywheel Housing Plug(#26200929-26264142)
02***13Plug1
61***90Spacer1
63***30Plate1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Flywheel Housing(#26200929-26223713)
67***10Housing,Flywheel1
67***40Gasket, Cover Plate1
67***50Plug, O-Ring1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Flywheel Housing(#26223714-26239105)
67***40Gasket, Cover Plate1
67***50Plug, O-Ring1
67***60Seal, O-Ring1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Flywheel Housing(#26239106-)
67***30Plate, Cover1
67***50Plug, O-Ring1
67***61O-Ring,Bearing Cap1
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Komatsu : S6d102e-1w-D(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-D(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-D(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-D(S/N 26200929-Up) : Engine : Front Cover(#26200929-26239105)
67***40Pin, Timing1
67***50Ring, Retaining1
67***60Screw, Round Head (M5-0.80x17)2
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Front Cover(#26239106-)
67***11Gasket1
67***40Pin, Timing1
67***50Ring, Retaining1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Front Gear Train Cover
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-D(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-D(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-D(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-D(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-D(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-D(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-D(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-D(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-D(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-D(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-D(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-D(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-D(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-D(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-D(S/N 26200929-Up) : Engine : Fuel Injection Pump Mounting And Gear
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-D(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-D(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-D(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-D(S/N 26200929-Up) : Engine : Fuel Return(#26231951-)
01***45Bolt,(Noise Abatement Part)2
04***08Clip1
61***80Spacer2
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Komatsu : S6d102e-1w-D(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-D(S/N 26200929-Up) : Engine : Heat Shield
01***20Bolt,(Forwarded Individually Parts)9
01***25Bolt - Relay Mounting4
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)3
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Komatsu : S6d102e-1w-D(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-D(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-D(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-D(S/N 26200929-Up) : Engine : Injection Piping(#26204449-26231950)
67***80Seal, Grommet1
67***60Brace, Tube1
67***30Seal, Banjo Connector (6.2 mm)6
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Injection Piping(#26231951-)
67***80Seal, Grommet1
67***60Brace, Tube1
67***40Screw, Banjo Connector (M6x1.00x14.3)6
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Komatsu : S6d102e-1w-D(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-D(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-D(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-D(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-D(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-D(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-D(S/N 26200929-Up) : Engine : Oil Pressure Switch And Water Temperature Sensor(#26200939-26222494)
07***12Washer, Gasket,(Without Thermo Sensor) (K1)1
60***61Sensor,Water Temperature1
67***30Cartridge, Engine Oil Filter2
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Komatsu : S6d102e-1w-D(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-D(S/N 26200929-Up) : Engine : Oil Pump(#26200939-)
67***10Oil Pump Ass'Y1
67***11Pump, Lubricating Oil1
67***20Bolt (M8x1.25x30)4
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Komatsu : S6d102e-1w-D(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-D(S/N 26200929-Up) : Engine : Oil Pump(#26273428-)
67***11Pump, Lubricating Oil1
67***20Bolt (M8x1.25x30)4
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Piston
67***00Piston Ring Ass'Y6
67***10Pin, Piston6
67***20Ring, Retaining12
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Rear Hanger
01***30Bolt, Mounting - Front Hand Rails2
67***20Plate Hanger1
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Komatsu : S6d102e-1w-D(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-D(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-D(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-D(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-D(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-D(S/N 26200929-Up) : Engine : Safety Relay (Forwarded Individually Parts)(#26269414-)
Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Solenoid
01***70Screw1
01***20Bolt,(With Tachometer Outlet)2
01***35Screw1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Spare Parts(#26216483-)
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-D(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-D(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-D(S/N 26200929-Up) : Engine : Starting Motor (4.5kw) (Inner Parts)(#26200929-26239105)
60***10Starting Motor Ass'Y,(4.5kw)1
ND***82Yoke Assembly1
ND***00Washer, Felt1
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Komatsu : S6d102e-1w-D(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-D(S/N 26200929-Up) : Engine : Starting Motor (4.5kw)(#26200929-26239105)
(6***0)Starting Motor Ass'Y,(4.5kw) (See Fig.A621p-02a2)1
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Komatsu : S6d102e-1w-D(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-D(S/N 26200929-Up) : Engine : Starting Motor Mounting
67***11Gasket,Starter1
67***20Bolt, Mounting (M10x1.50x35)2
67***10Bolt (M10x1.50x35)2
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Komatsu : S6d102e-1w-D(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-D(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-D(S/N 26200929-Up) : Engine : Tachometer Drive Cover
67***90Cover, Mechanical Tach Drive1
67***20Seal, Rectangular Ring1
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Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Tappet
Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Thermostat
Komatsu : S6d102e-1w-D(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-D(S/N 26200929-Up) : Engine : Turbocharger Mounting(#26200929-26232772)
67***10Stud ((M10x1.50 (Both Ends) X42))4
67***20Nut (M10x1.50)4
67***30Gasket, Turbocharger Mounting1
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Komatsu : S6d102e-1w-D(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-D(S/N 26200929-Up) : Engine : Turbocharger Oil Piping(#26200929-26238405)
67***80Connector, Male2
67***30O-Ring,Turbocharger Drain2
67***20Gasket1
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Komatsu : S6d102e-1w-D(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-D(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-D(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-D(S/N 26200929-Up) : Engine : Water Connector Elbow(#26222494-)
Komatsu : S6d102e-1w-D(S/N 26200929-Up) : Engine : Water Connector Plug
Komatsu : S6d102e-1w-D(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-D(S/N 26200929-UP) serial number reference

The PIN plate is located on the right-hand side of the cab on the lower frame, typically just behind the front idler or beneath the operator's window. The prefix is the first character of the 17-character ISO PIN, which identifies the machine family (e.g., 'A' for WA wheel loaders, 'B' for D dozers).

PrefixIdentifies
AWA180-3 Avance Plus / WA180-3L
BD41E-6

Frequently asked questions

What engine does the Komatsu WA180-3 use?

The Komatsu WA180-3 uses the S6D102E-1W-D six-cylinder in-line diesel engine.

What is the operating weight of the Komatsu WA180-3?

The operating weight varies by configuration, typically ranging from 17,000 to 19,000 lb (7,700 to 8,600 kg).

What replaced the Komatsu WA180-3?

The WA180-3 was succeeded by the WA180-4 and later the WA180-5 wheel loader models.

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

What is the net horsepower rating for the Komatsu S6D102E-1W-D engine?
110 hp (82 kW) at 2,400 rpm. This rating applies to the S6D102E-1 series engines used in the D41E-6 dozer and similar WA180-3 wheel loader configurations within the specified serial range. Output may vary slightly depending on the specific machine application and emissions package installed. Have your dealer verify the exact rating plate data for your specific unit.
What are the physical dimensions of the S6D102E-1W-D engine block?
The engine measures 1,219 mm (48.0 in) in length, 770 mm (30.3 in) in width, and 934 mm (36.8 in) in height. These dimensions are for the standard six-cylinder inline configuration. Verify clearances with your dealer before planning engine removal or transport.
What are the common hydraulic behaviors and failure modes associated with this engine series?
Operators report that Komatsu hydraulic pumps and control valves are sensitive to contamination. A common failure pattern is pump wear leading to a cascade of engine issues, often cited as a reason for lower resale values on older Dash 6 machines. If all hydraulic functions become slow, check the hydraulic oil level, filter condition, and engine RPM under load before assuming pump failure. Weak performance when hot often indicates internal leakage in the pump or main control valve due to decreased oil viscosity. Have your dealer verify hydraulic pressure specifications.
What undercarriage and wear patterns are typical for machines powered by this engine?
Machines equipped with this engine, such as the WA180-3 wheel loader and PC200-6 excavator, often exhibit undercarriage wear patterns related to track tension and roller condition. Operators note that tracks may loosen repeatedly if tension is not maintained. Pulling to one side during travel is frequently caused by mud packed into the undercarriage or uneven roller wear rather than hydraulic motor failure. Test travel speed in both forward and reverse to isolate hydraulic issues from mechanical binding. Have your dealer verify track tension and roller play.
What are the known engine quirks and cooling system issues for the S6D102E-1 series?
The engine is known for being fuel-efficient and smooth-running compared to earlier generations. However, the cooling package is prone to clogging between the radiator, hydraulic oil cooler, and charge-air cooler, especially in dusty environments. Overheating during heavy excavation is common if the spaces between heat exchangers are not cleaned regularly. If coolant is expelled or the system becomes pressurized shortly after a cold start, deeper engine diagnosis may be required. Have your dealer verify cooling system pressure and fan operation.
What are the common electrical and sensor issues reported by owners?
Multiple fault codes often point to battery state of charge, engine/chassis grounds, or connector corrosion rather than component failure. A battery may show acceptable voltage until the starter is loaded; a voltage drop test is recommended before replacing the starter. Engine fault codes should be checked if the machine loses power under load or refuses to start. Ensure all main starter cables and ground connections are clean and tight. Have your dealer verify electrical system integrity and sensor calibration.
What should be checked when buying a used machine with the S6D102E-1W-D engine (S/N 26200929-UP)?
Verify the engine serial number plate on the left side of the engine to confirm it matches the machine's data plate. Check for signs of hydraulic contamination, as pump wear can indicate engine stress. Inspect the cooling package for packed debris between heat exchangers. Test hydraulic performance cold and hot to identify internal leakage. Check track tension and roller condition for undercarriage wear. Verify the battery and starter load capacity. Have your dealer verify the exact engine specifications and maintenance history for this serial range.

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

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