Komatsuengine(no series)

Komatsu S4D102E-1D(S/N 26200163-UP)

Maintenance schedule, common problems & OEM parts breakdown

Search live S4D102E-1D(S/N 26200163-UP) parts

The Komatsu S4D102E-1D is a bare industrial diesel engine, not a complete machine. It's a four-cylinder, water-cooled, direct-injection unit from Komatsu's 102-series engine family, turbocharged but without an aftercooler (the plain "S" prefix, as opposed to the later aftercooled "SAA" generation). Bore and stroke are 102 mm x 120 mm for a displacement of about 3.9 L (238 cu in); gross output is documented anywhere from roughly 60 to 70 kW (81 to 105 hp) depending on the host machine and governed rating, so treat any single horsepower figure as a starting point, not a guarantee. This exact "-1D" designation is documented fitting mid-size hydraulic excavators (PC100-6, PC120-6, PC130-6 and related US-spec models); sibling suffixes built on the same block and serial run supplied compact wheel loaders and small-to-mid crawler dozers through the same era, roughly the late 1980s into the late 1990s. No standalone engine-only weight is published; the host machines it powers span roughly 8 to 13 tonnes depending on configuration.

The letter suffix after "S4D102E-1" (D, E, E-Z, E-Z3, F, F-US, J and others sharing this same serial break) doesn't mark a new engine generation. It marks a different flywheel housing, PTO, alternator, or market-specific calibration fitted to the same core block for a specific host machine, with several suffixes built in the same production run. The real generational split in this family is aspiration: this "-1" series (plain "S" prefix, turbo only, no aftercooling) was superseded by the "-2" series (SAA4D102E-2), which added air-to-air aftercooling and cleaner-burning combustion to meet the next round of emissions rules. In the parts market today, the S4D102E-1D matters because it's a mechanically governed, pre-electronic diesel with no ECM and no sensors to chase; that simplicity keeps a wide population of older Komatsu excavators, loaders, and dozers running well past the point their factory electronics would otherwise force a scrap decision. Rebuildable wet cylinder liners and a straightforward mechanical fuel system also make it a favorite for in-frame overhauls rather than outright replacement.

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 S4D102E-1D(S/N 26200163-UP) specifications

Engine

Model / family	S4D102E-1D, part of the Komatsu 102-series 4-cylinder diesel engine family. This arrangement shares a common parts book (S/N 26200163-UP) with the S4D102E-1E, -1E-Z, -1E-Z3, -1F, -1F-US and -1J arrangements of the same base engine.
Type	Water-cooled, 4-cycle, direct-injection diesel, 4 cylinders in line
Bore x stroke	102 mm x 120 mm (4.02 in x 4.72 in)
Displacement	3.9 L (239 cu in)
Compression ratio	16.5:1 (per 102-series 4-cylinder block data; not separately confirmed for the -1D arrangement)
Gross power	Approximately 52-64 kW (70-86 hp), governed setting varies by host application: figures documented across the S4D102E-1 platform range from roughly 52 kW (70 hp) at 2350 rpm up to 64 kW (85.8-86 hp) at 2200 rpm. Power and governed speed for the -1D arrangement specifically are not separately published -- treat this as a platform range, not a single confirmed rating.
Aspiration	Both naturally aspirated and turbocharged dress exist within the S4D102E-1 family depending on application; the specific dress fitted to the -1D arrangement is not confirmed in publicly available sources
Emissions	Mechanical (jerk-pump) fuel injection, pre-electronic industrial diesel. No EPA or EU emissions-tier certification is publicly documented for this arrangement -- confirm compliance era with your dealer if required

Weights

Engine dry weight	Approximately 390 kg (860 lb), per general 102-series 4-cylinder block documentation. Not separately confirmed for the -1D arrangement or its specific accessory dress.
Operating / shipping weight	Not applicable -- this is a bare engine model, not a complete machine. Operating weight is set by the host equipment it is installed in.

Dimensions

Engine block length	Approximately 790 mm (31 in), per general 102-series 4-cylinder block documentation
Engine block width	Approximately 711 mm (28 in), per general 102-series 4-cylinder block documentation
Engine block height	Approximately 894 mm (35 in), per general 102-series 4-cylinder block documentation
Note	Figures above are for the general 4-cylinder 102-series short block and are not separately confirmed for the -1D arrangement's specific accessory/turbo dress. Transport dimensions, wheelbase, track gauge and ground clearance do not apply -- this is a bare engine, not a complete machine.

Performance

Rated speed	2000-2500 rpm, varies by governed setting per host application (documented range across S4D102E-1 installations)
Torque	Approximately 280-300 Nm (207-221 lb-ft) at 1500 rpm, per general 102-series 4-cylinder documentation; not separately confirmed for the -1D arrangement
Note	Travel speed, drawbar pull, lift/dig/dump performance and gradeability do not apply -- this is a bare engine, not a self-propelled machine

Service capacities (summary)

Engine oil	Not documented in publicly available sources for this specific arrangement -- confirm the refill quantity against the Komatsu 102-series diesel engine shop manual or with your dealer
Cooling system	Not documented in publicly available sources for this specific arrangement -- confirm against the Komatsu 102-series diesel engine shop manual or with your dealer
Fuel tank	Not applicable -- a bare engine has no integrated fuel tank; capacity is set by the host machine it is installed in

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

S4D102E-1D(S/N 26200163-UP) fluids & capacities

System	Capacity	Recommended fluid
Engine crankcase (with oil filter)	Not published as a stand-alone figure for this exact engine arrangement; per-machine service data for equipment built around this engine block commonly cites a combined engine-oil refill in the 12-14 L (3.2-3.7 US gal) range, but that spans different host drivelines and should not be read as a pure crankcase-only number. Confirm against the dipstick H-L marks and this engine's own data plate before service.	Komatsu Genuine engine oil (EO series). Select viscosity by ambient temperature per the standard Komatsu chart: SAE 10W-30 for general use across roughly -20 degC to 40 degC, SAE 15W-40 for warmer ranges above 0 degC, SAE 30 in consistently hot climates, and 0W-20/5W-30 in sustained cold below -20 degC. Change oil and filter together at the interval on the maintenance decal.
Cooling system	Not documented as an engine-only figure independent of the host machine's radiator and hose circuit; total coolant volume varies by installation. Verify with the radiator fill mark and top off to the correct level with the system cold.	Komatsu Genuine Super Coolant (all-season antifreeze/anti-corrosion type). Mix with clean water to the ratio needed for the coldest expected ambient temperature; do not exceed the concentration limits printed on the coolant container.
Fuel system	This is a bare industrial engine listing with no integral fuel tank; usable fuel capacity is set by the host machine, not by this engine's own refill chart.	Clean, water-free No. 2-D diesel fuel meeting standard cetane and sulfur limits. Drain accumulated water from the fuel filter/water separator at the scheduled interval and replace the fuel filter element on schedule.
Grease points	Spec only - no numeric grease-point count published for this arrangement.	Komatsu Genuine multipurpose grease, lithium-base, NLGI 2, for any externally accessible bearing points (for example a non-sealed idler or tensioner pulley) not covered by permanently sealed bearings. Follow the host machine's own greasing interval for these points.
Transmission/powertrain compartment(s)	Not applicable - no transmission is part of this engine listing.	Not applicable. Transmission fluid type and capacity are set by the host machine's own operation and maintenance manual, not by this engine.
Hydraulic system and tank	Not applicable - no hydraulic system is part of this engine listing.	Not applicable. Hydraulic oil type and tank capacity are set by the host machine's own operation and maintenance manual, not by this engine.
Final drives	Not applicable - no final drive is part of this engine listing.	Not applicable. Final drive oil type and capacity are set by the host machine's own operation and maintenance manual, not by this engine.
Axles/differentials	Not applicable - no axle or differential is part of this engine listing.	Not applicable. Axle oil type and capacity are set by the host machine's own operation and maintenance manual, not by this engine.

Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.

Komatsu S4D102E-1D(S/N 26200163-UP) maintenance schedule

Service interval	Tasks
Every 50 h	Check engine oil level daily before starting; top up as needed and note any overnight drop that points to a leak. Check coolant level daily in the radiator or reserve tank; top up with the correct mix, never straight water. Drain water and sediment from the fuel/water separator daily. Weekly, walk around the engine and check for fresh fuel, oil, or coolant leaks at the turbo, injection pump, and liner seal areas. Weekly, check fan belt tension and condition; replace if cracked or glazed. Weekly, check the air cleaner restriction indicator and service the element if it shows red.
Every 250 h	Change engine oil and replace the oil filter cartridge; shorten the interval if running high-sulfur fuel. Check battery electrolyte level and clean and tighten terminal connections. Re-check and adjust fan belt tension. Clean the fuel tank breather so the mechanical injection pump feed stays unrestricted.
Every 500 h	Replace the fuel filter cartridge and bleed the mechanical injection pump lines afterward. Inspect the turbocharger for oil seepage at the shaft seals and listen for bearing whine. Check alternator and starter motor mounting, wiring, and brush wear. Check compression or listen for combustion knock across all cylinders to catch early liner or ring wear. Inspect the crankcase breather and clean if fouled with oil residue.
Every 1,000 h	Pull and test the fuel injection nozzles for spray pattern, opening pressure, and dribble; recalibrate the mechanical injection pump if timing has drifted. Check turbocharger rotor shaft end play and radial play against factory limits. Inspect the vibration damper on the front of the crankshaft for cracking or rubber separation. Flush and inspect the cooling system for scale buildup and check corrosion inhibitor concentration in the coolant.
Every 2,000 h	Adjust valve clearance on all intake and exhaust valves to the cold-engine spec. Check and reset injection pump timing against the factory mark. Inspect wet cylinder liner seal rings and liner protrusion the next time the head is off. Check water pump shaft play and impeller condition; replace the seal if weeping. Replace coolant if running conventional coolant rather than long-life supercoolant.
Every 4,000 h	Replace the water pump as a preventive measure on high-duty-cycle applications rather than waiting for failure. Recondition or replace the turbocharger cartridge if shaft play is near the wear limit. Check main and connecting rod bearing clearances at the next teardown; this engine has no electronic diagnostics to flag bearing wear early.
Every 8,000 h	Plan an in-frame overhaul: new wet liners, pistons, rings, and main and rod bearings once compression and oil consumption trend down. Recondition the cylinder head: valve seats, guides, and injectors as a set rather than piecemeal. Rebuild or exchange the injection pump and turbocharger together with the in-frame kit since both are original components by this point.

Servicing the S4D102E-1D(S/N 26200163-UP) beyond the schedule

Predictive Maintenance & Fluid Analysis

This engine is mechanically governed with no ECM, so fluid sampling is the main early-warning tool. Pull an oil sample at every oil change and watch iron and chromium trends, a sign of wet-liner or ring wear on this block. Check coolant corrosion-inhibitor concentration with test strips; this generation predates long-life coolant as standard fill. Watch startup and load smoke color: blue signals turbo or ring wear, black signals injector or pump-timing drift. Test fuel for water content before it reaches the mechanical injection pump.

Corrective & Common Repairs

Common failure points on this block are turbo shaft seals (blue smoke, oil in the intake), wet-liner seal seepage into the oil pan, and injection pump or nozzle drift that shows up as hard starting and black smoke. Starter and alternator brush wear is routine at this engine's age. Water pump shaft seals weep coolant onto the timing cover before they fail outright, so catch it early. Because there's no ECM, diagnosis is mechanical: compression test, smoke color, and a physical injector pull, not a code reader.

Overhaul & Rebuild Points

This is a wet-liner design, so an overhaul means new liners, seal rings, pistons, and rings as a matched set, not just a hone and re-ring. Check liner protrusion above the block deck before torquing the head, and follow the factory sequence on head bolts to avoid distorting the wet-liner seal. Recondition valve seats and guides together with the head. Rebuild the turbocharger cartridge and recalibrate or exchange the mechanical injection pump at the same time, since both are original components by the time a block needs work.

Seasonal & Environment Servicing

Cold starts are the weak point on this mechanically governed engine: check batteries and starter cranking speed before winter, and use an ether or intake-heater aid if the host machine has one. Run winter-grade fuel to stop wax gelling in the injection lines. In hot or dusty applications, clean radiator fins and check the air cleaner indicator more often; a clogged element pushes this turbo engine into black smoke and heat soak faster than a naturally aspirated block. Check coolant freeze point and inhibitor level each season.

S4D102E-1D(S/N 26200163-UP) common service parts

Part number	Part	Notes
6732-71-6111	Filter, Fuel - Secondary	Fuel system service	Check fitment →
600-311-9101	Fuel Filter Ass'Y	Fuel system service	Check fitment →
600-311-9121	Cartridge,Fuel Filter	Fuel system service	Check fitment →
09637-90263	Plate? Instruction,Air Cleaner Element Mainte	Air intake service	Check fitment →
6732-21-5530	Cartridge, Engine Oil Filter	Lubrication service	Check fitment →

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

S4D102E-1D(S/N 26200163-UP) fault codes & troubleshooting

Code	Meaning	Likely cause	What to do
E02	Pump controller PC-EPC circuit fault - the electronic proportional control loop that matches engine speed to main hydraulic pump output is not operating correctly.	Damaged wiring or a loose connector at the main pump EPC solenoid, or an internal pump controller fault.	Inspect the EPC solenoid connector and harness at the main hydraulic pump before checking the pump controller itself.
E03	Rotary (swing) parking brake circuit fault.	Open or shorted wiring to the swing parking brake release solenoid, or a failed solenoid coil.	Stop the machine and inspect the swing brake solenoid wiring and connector before resuming operation.
E05	Governor motor system fault - a general fault in the electric governor motor loop that positions the mechanical injection pump's fuel control lever for auto-idle and engine speed matching.	Linkage binding at the injection pump governor lever, or a wiring fault between the controller and the governor motor.	Check the governor motor linkage for free movement and inspect the harness before replacing the motor.
E20	Hydraulic return-filter restriction - the return filter bypass indicator has tripped.	Clogged hydraulic return filter element or degraded hydraulic oil.	Replace the return filter element and check hydraulic oil condition.
E316	Governor motor step-out - the motor has lost synchronization with its commanded position.	Mechanical binding at the injection pump control lever, worn linkage, or a governor motor drive fault.	Check for binding at the governor lever and verify the motor moves freely through its full range before replacing it.
E317	Governor motor drive circuit open - disconnection in one of the motor phases.	Broken wire or corroded connector pin in the governor motor harness.	Check continuity of the governor motor harness and connector.
E318	Governor motor drive circuit short.	Chafed harness insulation shorting to ground, or a failed motor winding.	Inspect the harness for chafing and test governor motor winding resistance.

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

All S4D102E-1D(S/N 26200163-UP) assemblies by section

Every catalogued assembly group for the Komatsu S4D102E-1D(S/N 26200163-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Engine

Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Additional Pulley (Air Conditioner Pulley)(#26200163-26263585)

01***30	Bolt - Lower Oil Cooler Outlet Tubemounting	2
67***11	Pulley	1
67***11	Spacer	1
67***10	Spacer	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Air Cleaner (Forwarded Individually Parts)(#26200163-26204797)

60***50	Element Assembly, Complete	1
60***40	Element Assembly, Primary	1
60***70	Nut, Wing	1
60***80	Washer, Seal	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Air Cleaner (Forwarded Individually Parts)(#26204798-)

60***50	Element Assembly, Complete	1
60***40	Element Assembly, Primary	1
60***70	Nut, Wing	1
60***80	Washer, Seal	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Air Cleaner (Forwarded Individually Parts)(#26204798-26257281)

60***50	Element Assembly, Complete	1
60***40	Element Assembly, Primary	1
60***70	Nut, Wing	1
60***80	Washer, Seal	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Air Cleaner (Forwarded Individually Parts)(#26257282-)

60***50	Element Assembly, Complete	1
60***40	Element Assembly, Primary	1
60***70	Nut, Wing	1
60***80	Washer, Seal	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Air Cleaner Cap(#26242798-26257281)

60***30

Pre-Cleaner Ass'Y

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Air Cleaner Cap(#26257282-)

60***30

Pre-Cleaner Ass'Y

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Air Intake Heater

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Alternator (25a)

(6***0)

Alternator A. (25a),(See Fig.A601p-02a5)

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Alternator (25a) (Inner Parts)

60***10	Alternator A. (25a)	1
KD***57	Bearing,Ball? Front	1
KD***60	Pulley,Non Hardening	1
KD***40	Rear Bracket Ass'Y	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Alternator (60a) (Inner Parts)(#26212361-)

60***10	Alternator A. (60a),(See Fig.A601p-02a2)	1
ND***80	Screw	4
ND***30	Collar,Stud	1
ND***10	Screw	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Alternator (60a)(#26212361-)

(6***0)

Alternator A. (60a),(See Fig.A9990-02a3)

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Alternator Support

01***30	Bolt,(For Trimming Dozer)	1
01***11	Nut (Welded)	1
01***23	Washer,(With Car Heater)	1
01***23	Plain Washer	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Alternator Support (For 60a And 35a Alternator)(#26212361-)

01***95	Bolt (M10-1.50x95)	1
01***16	Washer,(For Shipping Parts)	1
67***60	Bolt, Mounting (M8-1.25x25)	2
67***30	Bolt, Hex Cap (M8-1.25x30)	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Belt Tensioner (For 25a Alternator) (Cooler Spec.)

67***30	Tensioner, Alternator Belt	1
67***21	Plate	1
67***20	Bolt (M10x1.50x70)	1
67***30	Tensioner, Belt	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Belt Tensioner (For 60a Alternator)(#26212361-)

67***40	Belt,Alternator And Water Pump	1
67***90	Plate	1
67***20	Bolt (M10x1.50x70)	1
67***30	Tensioner, Belt	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Belt Tensioner (High Speed Type) (For 25a Alternator)

67***30	Tensioner, Alternator Belt	1
67***10	Plate	1
67***40	Belt,Alternator And Water Pump	1
67***20	Bolt (M10x1.50x70)	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Belt Tensioner (High Speed Type) (For 60a Alternator)(#26212361-)

67***10	Plate	1
67***20	Bolt (M10x1.50x70)	1
67***30	Tensioner, Belt	1
67***20	Capscrew, Flat Head (M8-1.25x25)	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Boost Tube(#26200163-26202210)

07***12	Gasket,Injection Pump Piping	2
67***30	Tube	1
67***10	Screw, Banjo Connector (M12x1.50x24)	1
67***60	Adapter, Female	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Breather Hose(#26200163-26285970)

01***25	Bolt,(With Corrosion Resistor)	1
07***20	Clamp, Spring Hose	1
07***65	Hose	1
62***60	Distance Piece	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Breather Hose(#26285971-)

07***20	Clamp, Spring Hose	1
07***58	Hose	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Camfollower Cover(#26200163-26226524)

67***20	Bolt, Mounting (M8-1.25x16)	4
67***10	Cover, Push Rod	1
67***61	Gasket, Push Rod Cover	1
67***80	Seal, Grommet	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Camfollower Cover(#26226525-)

67***20	Bolt, Mounting (M8-1.25x16)	4
67***10	Cover, Push Rod	1
67***11	Cover	1
67***61	Gasket, Push Rod Cover	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Camshaft

67***11	Camshaft	1
67***20	Support, Camshaft Thrust	1
67***31	Gear, Camshaft	1
67***60	Bolt (M8x1.25x22)	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Caution Plate (Chinese) (Ordering Transferred Parts)(#26244848-)

09***63

Plate? Instruction,Air Cleaner Element Mainte

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Caution Plate (Chinese)(#26242817-26244847)

09***63	Plate? Instruction,Air Cleaner Element Mainte	1
67***11	Plate? Name	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Caution Plate (English)(#26200163-26244847)

67***10	Plate? Name	1
67***11	Plate? Name	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Caution Plate (English)(#26244848-)

67***11

Plate? Name

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Caution Plate (For Regulation Of Epa)(#26257320-)

67***70	Plate,Name	1
67***80	Plate	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Caution Plate (Indonesian)(#26200415-26244847)

09***63	Plate? Instruction,(For Indonesia)	1
67***70	Plate? Name	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Caution Plate (Russian) (Ordering Transferred Parts)(#26244848-)

09***63

Plate? Instruction,Air Cleaner

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Caution Plate (Spanish)(#26200163-26244847)

67***40

Plate? Name

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Cooling Fan

01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	4
01***35	Bolt, Mount Bracket To Floor	4
01***30	Screw	4
60***50	Fan,Cooling	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Corrosion Resistor

01***30	Bolt - Lower Oil Cooler Outlet Tubemounting	2
01***00	Bolt	3
07***12	Gasket,(Without Air Compressor Type) (K1)	4
07***14	Screw, Banjo Connector (M10)	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Crank Pulley(#26200163-26279927)

67***10	Pulley, Crankshaft	1
67***20	Bolt (M12x1.25x36)	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Crank Pulley(#26279928-)

67***10	Pulley	1
67***20	Bolt (M12x1.25x36)	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Crankshaft

67***20	Crankshaft Ass'Y	1
67***50	Gear, Crankshaft	1
67***11	Gear, Crankshaft	1
67***10	Main Metal Ass'Y	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Cylinder Block Blind Plug(#26200415-)

67***60

Plug, Expansion (Not Used With Side Oil Fill)

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Cylinder Block(#26200163-26221675)

67***10	Cylinder Block Ass'Y	1
67***10	Plug, Pipe (1/2-14 Npt)	1
67***30	Plug, Pipe (1/8 Nptf)	2
67***90	Nozzle, Piston Cooling	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Cylinder Block(#26221676-)

62***10	Screw	2
62***10	Seal, O-Ring (M10-1.00)	4
67***30	Block Assembly, Cylinder	1
67***90	Nozzle,Piston Cooling (K2)	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Cylinder Head(#26200163-26238878)

67***10	Head Ass'Y	1
67***50	Gasket	1
67***70	Insert, Exhaust	4
67***80	Insert, Intake	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Cylinder Head(#26238879-)

67***10	Retainer, Exhaust Valve Spring	8
67***10	Head Ass'Y	1
67***51	Gasket, Cylinder Head	1
67***70	Insert, Exhaust	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Engine Mounting(#26281570-)

01***40	Bolt (Op)	9
01***50	Bolt,(Spark Arrester Spec.)	3
01***35	Bolt, Mount Ground Driven Steering Pump	4
01***32	Washer,(With Auto Emergency Steering)	12

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Exhaust Connector Clamp

67***20

Clamp,Turbocharger Outlet Pipe

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Exhaust Manifold And Air Connector(#26200163-26207666)

07***08	Plug,(Without Auto Priming System)	1
67***10	Plug, Pipe (1/2-14 Npt)	2
67***60	Bolt, Mounting (M8x1.25x25)	6
67***30	Cover, Intake Manifold	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Exhaust Manifold And Air Connector(#26207667-)

07***08	Plug,(Without Auto Priming System)	1
67***10	Plug, Pipe (1/2-14 Npt)	2
67***60	Bolt, Mounting (M8x1.25x25)	6
67***30	Cover, Intake Manifold	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fan Drive Pulley (High Speed Type)

67***20	Support Ass'Y	1
67***70	Bolt, Mounting (M8-1.25x40)	4
67***10	Hub, Fan	1
67***20	Bearing, Ball	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fan Drive Pulley(#26200163-26202772)

67***20	Support Ass'Y	1
67***30	Pulley, Fan	1
67***70	Bolt, Mounting (M8-1.25x40)	4
67***40	Support	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fan Drive Pulley(#26202773-)

67***20	Support Ass'Y	1
67***30	Pulley, Fan	1
67***70	Bolt, Mounting (M8-1.25x40)	4
67***40	Support	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Flywheel Housing Plug (With Revolution Sensor)

01***25	Bolt - Relay Mounting	1
01***20	Bolt - Mount Risers To Cab Floor	1
02***13	Plug	1
08***14	Clip,(With After Cooler)	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Flywheel Housing(#26200163-26240503)

Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Flywheel Housing(#26240504-26244409)

67***10	Housing,Flywheel	1
67***20	Bolt (M8-1.25x16)	2
67***30	Plate, Cover	1
67***50	Plug, O-Ring	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Flywheel Housing(#26244410-)

02***13	Plug	1
67***40	Cover, Rear	1
67***30	Plate, Cover	1
67***50	Plug, O-Ring	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Flywheel(#26200163-26212899)

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Flywheel(#26212900-)

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Front Cover(#26200163-26238938)

67***40	Pin, Timing	1
67***50	Ring, Retaining	1
67***60	Screw, Round Head (M5-0.80x17)	2
67***80	Housing, Timing Pin	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Front Cover(#26238939-)

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Front Gear Train Cover(#26200163-26264932)

67***80	Gasket, Accessory Drive Cover	1
67***10	Plate, Accessory Drive Cover	1
67***30	Bolt, Flange Head (M12-1.75x25)	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Front Gear Train Cover(#26264933-)

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Filter

67***10	Cartridge,Fuel	1
67***11	Filter, Fuel - Secondary	1
67***20	Head	1
67***50	Adapter, Filter Head	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Filter Mounting And Piping(#26210163-26233544)

01***25	Bolt,(With Corrosion Resistor)	2
01***45	Screw	1
01***80	Bolt	2
07***12	Gasket,Mechanical Pump Piping	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Filter Mounting And Piping(#26233545-)

01***25	Bolt - Relay Mounting	2
01***50	Bolt (M10-1.50x150)	1
01***80	Bolt	2
07***12	Gasket,Mechanical Pump Piping	2

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Komatsu : S4d102e-1d(S/N 26200163-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
DK***20	Pump,Priming	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Feed Pump) (Inner Parts)(#26200163-26201323)

DK***20	Bolt, Joint	1
DK***60	Feed Pump Ass'Y	1
DK***00	Valve,Check	2
DK***20	Pump,Priming	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Feed Pump) (Inner Parts)(#26201324-26204722)

DK***20	Bolt, Joint	1
DK***60	Feed Pump Ass'Y	1
DK***00	Valve,Check	2
DK***20	Pump,Priming	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Feed Pump) (Inner Parts)(#26204723-)

DK***20	Bolt, Joint	1
DK***60	Feed Pump Ass'Y	1
DK***00	Valve,Check	2
DK***20	Pump,Priming	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Feed Pump) (Inner Parts)(#26215008-)

DK***20	Bolt, Joint	1
DK***60	Feed Pump Ass'Y	1
DK***00	Valve,Check	2
DK***20	Pump,Priming	1

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Komatsu : S4d102e-1d(S/N 26200163-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
DK***00	Bolt	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Inner Parts)(#26200163-26201323)

DK***00	Washer	1
DK***00	Shim? 2.00mm,(High Altitude Spec.)	0
DK***00	Shim	1
DK***20	Housing	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Inner Parts)(#26201324-26204722)

DK***00	Shim? 2.00mm,(High Altitude Spec.)	0
DK***00	Gasket	1
DK***40	Gasket	1
DK***00	Bolt	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Inner Parts)(#26204723-)

DK***00	Shim? 2.00mm,(High Altitude Spec.)	0
DK***00	Gasket	1
DK***40	Gasket	1
DK***00	Bolt	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Inner Parts)(#26215008-)

DK***00	Shim? 2.00mm,(High Altitude Spec.)	0
DK***00	Gasket	1
DK***40	Gasket	1
DK***00	Bolt	1

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Komatsu : S4d102e-1d(S/N 26200163-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
DK***10	Key? 13mm,Woodruff	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Inner Parts)(#26200163-26201323)

DK***00	Gasket	1
DK***40	Gasket,Air Compressor	2
DK***00	Nut,Cap	1
DK***00	Bushing	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Inner Parts)(#26201324-26204722)

DK***00	Gasket	1
DK***40	Gasket,Air Compressor	2
DK***00	Nut,Cap	1
DK***10	Key? 13mm,Woodruff	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Inner Parts)(#26204723-)

DK***00	Gasket	1
DK***40	Gasket,Air Compressor	2
DK***00	Nut,Cap	1
DK***10	Key? 13mm,Woodruff	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Inner Parts)(#26215008-)

DK***00	Gasket	1
DK***40	Gasket,Air Compressor	2
DK***00	Nut,Cap	1
DK***10	Key? 13mm,Woodruff	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)

67***10	Injection Pump Ass'Y	1
DK***30	Bearing	0
DK***20	Housing	1
DK***20	Shim, 1.40mm; Was Dk029311-7220, Shim? 1.4mm	0

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#26200163-26201323)

67***20	Injection Pump Ass'Y	1
DK***30	Bearing	0
DK***20	Housing	1
DK***20	Shim, 1.40mm; Was Dk029311-7220, Shim? 1.4mm	0

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#26201324-26204722)

67***21	Injection Pump Ass'Y	1
DK***30	Bearing	0
DK***20	Housing	1
DK***20	Shim, 1.40mm; Was Dk029311-7220, Shim? 1.4mm	0

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#26204723-)

67***22	Injection Pump Ass'Y	1
DK***30	Bearing	0
DK***20	Housing	1
DK***20	Shim, 1.40mm; Was Dk029311-7220, Shim? 1.4mm	0

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)(#26215008-)

67***10	Injection Pump Ass'Y	1
DK***30	Bearing	0
DK***20	Housing	1
DK***20	Shim, 1.40mm; Was Dk029311-7220, Shim? 1.4mm	0

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Komatsu : S4d102e-1d(S/N 26200163-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	4
DK***30	Shim? 1.45mm, Shim, 1.45mm; Was Dk029311-0630	0

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#26200163-26201323)

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	4
DK***30	Shim? 1.45mm, Shim, 1.45mm; Was Dk029311-0630	0

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#26201324-26204722)

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	4
DK***30	Shim? 1.45mm, Shim, 1.45mm; Was Dk029311-0630	0

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#26204723-)

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	4
DK***30	Shim? 1.45mm, Shim, 1.45mm; Was Dk029311-0630	0

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Inner Parts)(#26215008-)

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	4
DK***30	Shim? 1.45mm, Shim, 1.45mm; Was Dk029311-0630	0

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Komatsu : S4d102e-1d(S/N 26200163-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
62***10	Seal, O-Ring (M10-1.00)	1
67***50	Connector, Female	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump And Oil Piping(#26204723-)

07***12	Gasket,(Without Air Compressor Type) (K2)	2
07***10	Screw, Banjo Connector (M10-1.25x20)	1
61***40	Nipple	1
62***10	Seal, O-Ring (M10-1.00)	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump And Oil Piping(#26215008-)

07***12	Gasket,(Without Air Compressor Type) (K2)	2
07***10	Screw, Banjo Connector (M10-1.25x20)	1
61***40	Nipple	1
62***10	Seal, O-Ring (M10-1.00)	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Injection Pump Mounting

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Inlet Joint

61***50

Joint

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel Return

04***08	Clip	1
07***00	Clip	2
62***00	Hose,Spill	1
67***31	Joint	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Fuel System Accessory

67***60	Bolt, Mounting (M8-1.25x25)	1
67***20	Bolt, Flange (M8-1.25x20)	1
67***10	Gasket, Cover Plate	1
67***11	Gasket, Cover Plate	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Head Cover(#26200163-26233544)

61***10	Cap, Oil Filler	1
67***30	Bolt (M8x1.25x25)	4
67***50	Washer, Plain (3/8 Inch)	4
67***80	Gasket, Valve Cover	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Head Cover(#26203667-)

67***30	Bolt (M8x1.25x25)	4
67***50	Washer, Plain (3/8 Inch)	4
67***81	Gasket, Valve Cover	4
67***10	Gasket,Camfollower Cover Bolt	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Heat Shield(#26200163-26220139)

01***16	Bolt, Mount Solenoid Valve	6
01***20	Bolt,(Forwarded Individually Parts)	6
01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	1
01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Heat Shield(#26220140-26249417)

01***35	Stud	2
01***16	Bolt, Mount Solenoid Valve	4
01***20	Bolt,(Forwarded Individually Parts)	8
01***45	Bolt	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Heat Shield(#26249418-)

01***35	Stud	2
01***16	Bolt, Mount Solenoid Valve	4
01***20	Bolt,(Forwarded Individually Parts)	8
01***45	Bolt	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Heater Switch (Forwarded Individually Parts)(#26200163-26224557)

60***70

Switch,Air Intake Heater

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Heater Switch (Forwarded Individually Parts)(#26257282-)

60***70

Switch,Air Intake Heater

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Heater Switch(#26224558-26257281)

60***70

Switch,Air Intake Heater

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Heater Switch(#26257282-)

60***70

Switch,Air Intake Heater

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Injection Nozzle(#26200163-26237765)

67***00	Nozzle Holder Ass'Y	4
67***30	Nozzle	1
67***50	Seal, Rectangular Ring	4
67***40	Retainer, Injector Nozzle	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Injection Nozzle(#26237766-)

67***00	Nozzle Holder Ass'Y	1
67***20	Injector	1
67***30	Nozzle	1
67***02	Kit,Nozzle Holder	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Injection Piping(#26200163-26229657)

04***08	Clip	1
07***12	Gasket,Mechanical Pump Piping	2
61***80	Spacer	2
67***20	Bolt, Mounting (M8-1.25x16)	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Injection Piping(#26229658-)

04***08	Clip	1
07***12	Gasket,Mechanical Pump Piping	2
61***80	Spacer	2
67***20	Bolt, Mounting (M8-1.25x16)	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Main Power Take Off

01***35	Bolt, Mount Ground Driven Steering Pump	6
01***32	Washer,(Not Used With Emergency Str.)	6
20***60	Coupling	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Main Power Take Off(#26281570-)

01***35	Bolt, Mount Ground Driven Steering Pump	6
01***32	Washer,(Not Used With Emergency Str.)	6
20***60	Coupling	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Muffler (With Exhaust Pipe)(#26257282-)

01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	4
01***35	Bolt,R.H. (For Add. Air Compressor)	2
01***06	Nut	4
62***80	U-Bolt	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Muffler (With Rain Cap)(#26200163-26220139)

01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	4
01***35	Bolt,R.H. (For Add. Air Compressor)	2
01***06	Nut	4
20***31	Pipe,Exhaust	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Muffler (With Rain Cap)(#26220140-26257281)

01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	4
01***35	Bolt,R.H. (For Add. Air Compressor)	2
01***06	Nut	4
20***31	Pipe,Exhaust	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Muffler(#26200163-26220139)

01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	4
01***35	Bolt,R.H. (For Add. Air Compressor)	2
01***06	Nut	4
62***80	U-Bolt	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Muffler(#26220140-26244933)

01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	4
01***35	Bolt,R.H. (For Add. Air Compressor)	2
01***06	Nut	4
62***80	U-Bolt	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Muffler(#26244934-26257281)

01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	4
01***35	Bolt,R.H. (For Add. Air Compressor)	2
01***06	Nut	4
62***80	U-Bolt	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Muffler(#26257282-)

01***25	Bolt, Mount Engine Oil Drain To Fuel Tank	4
01***35	Bolt,R.H. (For Add. Air Compressor)	2
01***06	Nut	4
62***80	U-Bolt	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Oil Cooler And Oil Filter (For 25a Alternator)

67***51	Valve, Pressure Relief	1
67***20	O-Ring,Oil Pressure Plug	1
67***30	Gasket, Filter Head	1
67***31	Gasket, Filter Head	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Oil Cooler And Oil Filter(#26200278-)

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Oil Filler Cap(#26200163-26202772)

61***10

Cap, Oil Filler

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Oil Filler(#26233545-)

01***35	Bolt, Mount Bracket To Floor	1
07***09	Clamp, Hose	1
07***09	Clamp,(See Fig. K0210-16a0)	2
20***80	Clip	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Oil Gauge

01***12	Bolt - Front Cover Mounting	3
01***90	Screw	1
01***14	Bolt - Fuel Sensor Mounting	1
01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Oil Level Sensor And Oil Gauge

01***12	Bolt,(Without R.P.C.U.)	3
01***12	Bolt,(See Fig. K0210-16a0)	3
01***16	Bolt, Mount Solenoid Valve	1
01***35	Bolt, Cover	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Oil Pan And Suction Tube

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Oil Pan Bolt

67***10

Bolt, Mounting (M8-1.25 X 25)

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Oil Pressure Switch(#26200163-26221675)

67***30	Cartridge, Engine Oil Filter	1
67***40	Switch,Oil Pressure	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Oil Pressure Switch(#26221676-)

08***05	Switch,Engine Oil Pressure	1
62***10	Seal, O-Ring (M10-1.00)	1
67***30	Cartridge, Engine Oil Filter	1
67***70	Adaptor	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Oil Pump(#26200163-26276328)

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Oil Pump(#26276329-)

67***12	Pump, Lubricating Oil	1
67***20	Bolt (M8x1.25x30)	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Piston

67***00	Piston Ring Ass'Y	4
67***10	Pin, Piston	4
67***20	Ring, Retaining	8
67***00	Rod, Engine Connecting	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Pre-Fuel Filter (Forwaraded Individually Parts)(#26200163-26257281)

07***12	Gasket,Mechanical Pump Piping	1
60***01	Fuel Filter Ass'Y	1
60***21	Cartridge,Fuel Filter	1
61***31	Plug,(Not Shown)	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Pre-Fuel Filter (Forweraded Individually Parts)(#26257282-)

07***12	Gasket,Mechanical Pump Piping	1
60***01	Fuel Filter Ass'Y	1
60***21	Cartridge,Fuel Filter	1
61***31	Plug,(Not Shown)	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Rear Hanger

67***20	Bolt (M12x1.75x30)	2
67***10	Bracket, Lifting	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Repair Parts (1/4) (Cylinder Head)

67***51	Gasket, Cylinder Head	1
67***51	Gasket, Cylinder Head	1
67***10	Guide, Valve Stem - Intake/Exhaust (Thin Wall)	8
67***10	Guide, Valve Stem (Thick Wall 60.5mm Long Int)	4

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Komatsu : S4d102e-1d(S/N 26200163-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	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Repair Parts (3/4) (Crankshaft)

67***00	Main Metal Ass'Y	4
67***00	Main Metal Ass'Y	4
67***00	Main Metal Ass'Y	4
67***00	Thrust Metal Ass'Y	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Repair Parts (4/4) (Piston)

67***00	Piston Ring Ass'Y	4
67***00	Piston Ring Ass'Y	4
67***20	Piston? 0.5mm	4
67***30	Piston? 1.0mm	4

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Rocker Arm

Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Spare Parts

07***16	Gasket,(For Pc750-6) (See Fig.A2110)	1
67***81	Gasket, Valve Cover	4
67***10	Gasket,Camfollower Cover Bolt	4
67***40	Cartridge,Engine Oil	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Spare Parts (For 35a And 60a Alternator)(#26233545-)

07***16	Gasket,(For Pc750-6) (See Fig.A2110)	1
67***81	Gasket, Valve Cover	4
67***10	Gasket,Camfollower Cover Bolt	4
67***40	Cartridge,Engine Oil	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Starting Motor (4.5kw)

(6***0)

Starting Motor Ass'Y,(4.5kw) (See Fig.A621p-02a0)

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Starting Motor (4.5kw) (Inner Parts)

60***10	Starting Motor Ass'Y	1
KD***10	Spring	1
KD***40	Pinion	1
KD***50	Washer	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Starting Motor Mounting(#26200163-26236431)

67***11	Gasket,Starter	1
67***20	Bolt, Mounting (M10x1.50x35)	2
67***10	Bolt (M10x1.50x35)	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Starting Motor Mounting(#26236432-)

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Tachometer Drive Cover

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Tappet

67***12

Tappet, Valve

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Thermostat Housing(#26200163-26202312)

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Thermostat Housing(#26202313-)

07***25	Clip,(For Slag Handling)	2
67***40	Bolt, (M8x1.25x35)	1
67***71	Coupling	1
67***80	Bolt (M8-1.25x70)	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Thermostat(#26200163-26281220)

67***20

Thermostat

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Thermostat(#26281221-26295762)

67***71

Thermostat

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Thermostat(#26295763-)

67***71

Thermostat

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Turbocharger Mounting(#26200163-26233151)

67***00	Turbocharger Ass'Y	1
67***10	Stud ((M10x1.50 (Both Ends) X42))	4
67***20	Nut (M10x1.50)	4
67***40	Gasket, Turbocharger	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Turbocharger Mounting(#26233152-)

Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Turbocharger Oil Piping (For 35a And 60a Alternator)(#26231225-)

67***60	Hose, Flexible	1
67***30	O-Ring,Turbocharger Drain	2
67***10	Tube,Oil	1
67***20	Gasket	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Turbocharger Oil Piping(#26200163-26277269)

62***90	Gasket,Turbocharger Oil Drain	1
67***30	Hose	1
67***50	Gasket,Oil Drain (Not Shown)	1
67***80	Connector, Male	2

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Turbocharger Oil Piping(#26277270-)

01***30	Bolt,(Water Separator Spec.)	1
07***12	Gasket,(Without Air Compressor Type) (K1)	2
07***14	Screw, Banjo Connector (M10)	1
62***90	Gasket,Turbocharger Oil Drain	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Under Plate

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Water Connector

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Water Connector (For 35a And 60a Alternator)(#26222967-)

01***80	Bolt (M10-1.50x80)	1
61***50	Bracket	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Water Connector Plug

Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Water Pump(#26200163-26202770)

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Water Pump(#26202771-26274660)

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

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Water Pump(#26274661-)

67***60	Bolt (M8x1.25x22)	2
67***02	Water Pump Ass'Y	1
67***20	Seal, Rectangular Ring	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Water Separator (Forwarded Individually Parts)(#26200163-26257281)

07***12	Gasket,Mechanical Pump Piping	1
60***31	Separator Assembly, Water	1
60***60	Plug,Drain (4d105-5h? 4d105-5t)	1
60***90	O-Ring,Seal	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Water Separator (Forwarded Individually Parts)(#26257282-)

07***12	Gasket,Mechanical Pump Piping	1
60***90	O-Ring	1
60***90	Plug,Drain	1
60***31	Separator Assembly, Water	1

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Komatsu : S4d102e-1d(S/N 26200163-Up) : Engine : Water Valve And Water Temperature Sensor

09***00	Valve	1
20***30	Valve,Heat Water Inlet	1
67***10	Adapter	1
78***80	Sensor,Water Temperature	1

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Frequently asked questions

What engine specs does the S4D102E-1D carry?

It's a four-cylinder, water-cooled, turbocharged (no aftercooler) diesel from Komatsu's 102-series family. Bore and stroke are 102 mm x 120 mm for roughly 3.9 L (238 cu in) displacement, with a mechanical fuel-injection pump and governor and no electronic controls. Gross output is documented anywhere from about 60 to 70 kW (81 to 105 hp), varying by the host machine and rating it was built for.

What's the operating weight?

There's no published engine-only weight for the S4D102E-1D; it was never sold as a standalone unit outside a host machine. The equipment it's documented in ranges from roughly 8-tonne compact wheel loaders up to 12-13 tonne mid-size excavators, so weight depends entirely on which machine it's installed in.

What replaced the S4D102E-1D?

Within Komatsu's 102-series, this turbo-only "-1" generation was replaced by the SAA4D102E-2, which added air-to-air aftercooling and met the next round of emissions standards. The naturally aspirated 4D102E-1 was this engine's non-turbo sibling on the same base block, not its successor.

What S4D102E-1D(S/N 26200163-UP) owners discuss

Is the S4D102E-1D the same engine web listings show for later-model Komatsu 4D102 engines with electronic controls?

No. The -1D arrangement is part of the mechanical, jerk-pump 102-series 4-cylinder family (bore/stroke 102 x 120 mm, 3.9 L), grouped under the same parts book and serial run (S/N 26200163-UP) as the -1E, -1E-Z, -1E-Z3, -1F, -1F-US and -1J arrangements. It is a different design generation from the later electronically governed Tier 2 unit fitted to newer-production PC120-6/PC120LC-6 excavators, which has its own throttle/governor motor and its own fault-code list (governor-motor and throttle-actuator alarms, for example). Those electronic fault codes do not apply to a mechanical -1D engine, which has no engine control unit of its own. Read the engine data tag on the block (or the stamped serial if the tag is missing) to confirm which dress you actually have before ordering parts or chasing a fault code that doesn't belong to this engine.

What do mechanics say about cold-starting and hard-start complaints on this engine?

A healthy engine in this family should catch within a few seconds cold, with any startup smoke clearing almost immediately. Slow-to-catch starts, extended cranking, or smoke that lingers past the first few seconds get traced most often to worn piston rings/cylinder liners (low compression) or a tired injection pump losing delivery pressure and timing accuracy, not to anything electrical, since the -1D's fuel system is mechanical with no electronic start-assist to fail. A compression check across all cylinders plus a look at injector spray pattern is the standard first step mechanics take before condemning the injection pump itself. Have your dealer verify compression and injector condition before replacing pump components.

What electrical or sensor issues come up most often on machines built around this engine?

Most of what owners flag as 'electrical' on this engine family is actually in the host machine's starter safety circuit and monitor panel, not the engine itself. Komatsu ties the charging-circuit signal into a starter safety relay so the starter cannot be engaged once the alternator shows the engine running; a weak alternator diode or a poor ground in that circuit is a repeat cause of no-crank or intermittent no-start complaints on mechanical-engine Komatsu machines of this era. On excavator hosts with a basic gauge/monitor panel, a failed oil-pressure switch or its wiring is a commonly reported source of false low-oil-pressure alarms and stored panel codes -- these are monitor-panel sensor faults, separate from the mechanical fuel system and separate from actual oil pressure trouble. Have your dealer verify the wiring and relay before swapping the alternator or starter.

What powertrain or hydraulic behaviors are typical for equipment running this engine?

Because this engine block powers several different Komatsu product lines, the drivetrain symptom depends on which machine it's bolted into -- treat any single figure below as varying by configuration/series. On wheel-loader hosts with a torque-converter powershift transmission, a low-power complaint usually traces to worn transmission/torque-converter charge pressure from pump wear or a sticking valve block, confirmed with a stall test (one documented troubleshooting case put the low reading around 200-345 kPa / 30-50 psi, but check that against the loader's own test chart rather than treating it as a universal spec). On dozer hosts running a hydrostatic-shift transmission (no torque converter), a 'loses drive, won't turn' complaint has been traced to a clogged transmission filter and worn O-rings rather than the engine. On excavator hosts, a load-sensing hydraulic pump that loses pressure and power once the system reaches full operating temperature is a commonly discussed symptom, and it usually points to the main pump or its regulator, not the engine. Identify which driveline is actually fitted before chasing an engine-side cause for a power complaint.

What wear patterns show up on this engine over time, and does undercarriage wear apply to it?

Undercarriage and track wear belong to whichever excavator or dozer chassis this engine is installed in, not to the engine itself, and the wear pattern there varies by host machine and application -- it isn't an engine characteristic. On the engine block itself, the wear items mechanics repeatedly point to across this mechanical 102-series family are: injector nozzles losing spray pattern and pump plunger wear over time (the main driver of the hard-start/smoky symptom above), a water pump shaft seal that starts weeping as a routine age-related leak, and, on turbocharged dress units, turbo shaft play or oil-seal wear showing up as light blue smoke or a boost/power loss around mid-to-high hours. None of this is a defect unique to the -1D calibration -- it's the general wear pattern reported across the mechanical 4-cylinder 102-series family regardless of dash suffix.

What's the general reliability reputation of this engine family among people who've run it long-term?

General sentiment among mechanics and long-term owners of Komatsu's mechanical industrial diesels from this era is that the block itself is tough and rarely wears out gradually on its own -- a specific component (injection pump, turbo, cooling system) giving out is described as the more common failure path than a worn-out bottom end. The tradeoff most often mentioned is rebuild cost: a full rebuild on this platform is described as expensive relative to sourcing a decent low-hour used unit, so many shops favor component-level repair (pump, turbo, head) over a full rebuild unless the block itself is confirmed damaged. Treat this as a general platform reputation, not a guarantee about the condition of any individual -1D unit.

What should I check when buying a used machine built around an S4D102E-1D engine?

Read the engine data tag on the block (or the stamped serial if the tag is gone) and confirm the arrangement suffix actually matches what the seller claims -- several closely related dash-suffix engines share this same serial run, so a tag mismatch is easy to miss. Insist on a genuine cold start: an engine that hasn't run for several hours should catch within a few seconds with smoke clearing almost immediately; slow catch or lingering smoke points to low compression or pump wear. Briefly pull the oil fill cap at idle and check for excess crankcase pressure or smoke pushing out, a sign of worn rings. Check the dipstick and radiator/cap for coolant-in-oil or oil-in-coolant cross-contamination, a sign of head gasket or liner seal trouble. If the seller can't produce recent maintenance or oil-sample records, pull an oil sample for a wear-metal analysis (Komatsu's own oil-and-wear-analysis program is built for exactly this) before committing. Because the injection pump, turbo (on turbocharged dress) and starter safety circuit are the areas mechanics flag most often on this family, have your dealer verify compression, injector condition and pump timing before you finalize a purchase.

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

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