Komatsuengine(no series)

Komatsu S6D102E-1DD(S/N 26200929-UP)

Maintenance schedule, common problems & OEM parts breakdown

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

The Komatsu S6D102E-1DD engine (S/N 26200929-UP) is a six-cylinder in-line diesel powerplant used in mid-size construction equipment, primarily the PC200-6 and PC210-6 excavator series and WA320 wheel loaders. It delivers approximately 140 horsepower and fits within the 20,000 to 60,000 lb operating weight class. Production for this engine configuration spans the late 1990s through the early 2000s, serving as the predecessor to the SAA6D102E-2 series found in the PC200-7 and PC210-7 generations. Configurations included standard and long-carriage (LC) undercarriage variants for excavators and standard wheel loader platforms.

Across the 102 series generations, the primary change was the transition from the naturally aspirated or early turbocharged S6D102E-1DD to the electronically controlled SAA6D102E-2, driven by Tier 3 and Tier 4 emissions regulations. The S6D102E-1DD remains critical in the used and parts market because it powers the high-volume PC200-6 and PC210-6 platforms, which are still widely active in earthmoving and utility work. Its mechanical simplicity and widespread adoption make it a staple for aftermarket overhaul kits and replacement components.

Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.

Komatsu S6D102E-1DD(S/N 26200929-UP) specifications

Engine

Model	S6D102E-1DD
Series	102 Series
Configuration	6 cylinder in-line turbo engine
Displacement	5.9 liter (359 CID)
Bore	102 mm (4.02 in)
Stroke	120 mm (4.72 in)
Power	134-157 kW (180-210 hp) @ 2500 rpm
Torque	420-450 Nm (310-330 lb.ft) @ 1500 rpm
Compression Ratio	16.5:1

Weights

Engine Weight

466 kg (1025 lb)

Dimensions

Engine Length	1067 mm (42 in)
Engine Width	711 mm (28 in)
Engine Height	894 mm (35 in)

Performance

Note	Travel speeds, lift/dig/dump/drawbar, and gradeability are machine-specific values not documented for the engine unit alone in the provided sources.

Service capacities (summary)

Note	Fuel tank, hydraulic system, engine oil, and cooling system capacities are machine-specific values not documented for the engine unit alone in the provided sources.

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

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

Service interval	Tasks
Every 10 h	Check engine oil level and condition Check hydraulic fluid level at sight glass Check coolant level and ensure cap is secure 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 on boom, stick, and bucket Check hydraulic fluid level Check air filter outer element Inspect belts and hoses Perform visual walk-around for leaks
Every 500 h	Change fuel filter and drain water separator Replace hydraulic return filter Test battery and alternator load Test coolant SCA concentration Collect KOWA oil sample Measure undercarriage wear
Every 1,000 h	Change hydraulic oil sample Change final drive oil on both sides Inspect turbocharger Check valve adjustment Inspect structural welds on boom and stick Replace air filter outer element if dirty
Every 2,000 h	Change hydraulic system oil Flush and replace coolant Service transmission Perform comprehensive component evaluation Check KDPF status Replace worn belts and hoses

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

Predictive Maintenance & Fluid Analysis

Utilize Komatsu KOWA fluid analysis at every 500-hour interval to monitor engine wear metals (iron, copper, lead) and contaminants like silicon or sodium. Check coolant SCA concentration at 500 hours to prevent liner cavitation in the S6D102E-1DD block. Monitor hydraulic oil particle count and viscosity to protect the PC200-6 pump and valve assemblies. Track DEF levels daily on Tier 4 variants to ensure SCR system efficiency. Use KOMTRAX telematics to track load frequency and fuel burn rates for early detection of power loss or inefficiency.

Corrective & Common Repairs

Address fuel system issues by replacing the fuel filter and draining the water separator at 500-hour intervals to prevent injector damage in the S6D102E-1DD. Inspect the turbocharger and intercooler hoses for cracks or leaks that cause power loss. Check the air filter restriction indicator and replace the outer element when dirty to prevent dust ingestion. Inspect the hydraulic return filter for clogging, which can overheat the system. Verify belt tension and hose clamps to prevent coolant or oil leaks common in aging WA320 and PC200-6 engines.

Overhaul & Rebuild Points

Plan for an inframe overhaul when engine wear reaches critical limits, typically involving piston rings, liners, and bearings for the S6D102E-1DD. Replace cylinder liners and pistons during a full rebuild to restore compression and power. Inspect the crankshaft and connecting rods for wear or damage. Replace valve guides and seats to ensure proper sealing. Use Komatsu Genuine Lubricants with OEM-formulated additive packages during reassembly to protect the new components and extend service life.

Seasonal & Environment Servicing

In cold climates, check coolant glycol content and SCA levels to prevent freezing and corrosion in the S6D102E-1DD cooling system. Use appropriate viscosity engine oil for low-temperature starts. In dusty environments, inspect the air filter more frequently and clean the radiator and oil cooler fins to prevent overheating. Check track tension and undercarriage wear on PC200-6 excavators operating in abrasive conditions. Ensure the battery and alternator are secure and clean to prevent electrical issues in wet or muddy jobsites.

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

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

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

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

Code	Meaning	Likely cause	What to do
CA115	Engine crankshaft speed sensor failure	Broken sensor, wiring issue, or connector corrosion	Replace the speed sensor and verify the voltage at the pin connector
CA451	Common rail pressure sensor feedback value too high	Malfunction in the rail sensor or actual overpressure condition	Diagnose the fuel rail pressure sensor or pump lines
CA111	Internal engine controller fault	ECM internal abnormality	Replace or reprogram the ECM
CA234	Engine overspeed	Throttle calibration error, engine load cycle issue, or operator misuse	Verify throttle calibration and engine load cycle
CA441	Battery voltage too low	Alternator failure, battery degradation, or voltage regulator issue	Replace the alternator or battery; check the voltage regulator
AA10NX	Air cleaner clogging	Blocked air filter element	Replace the air filter
CA122	Intake air pressure high voltage	Sensor malfunction or wiring issue	Verify the intake pressure sensor and wiring
CA123	Intake air pressure low voltage	Sensor short or airflow restriction	Check for a sensor short or an airflow restriction
CA2311	IMV solenoid valve failure	Faulty IMV solenoid or wire harness issue	Replace the IMV solenoid or inspect the wire harness
CA428	Fuel moisture sensor invalid voltage	Contaminated fuel supply or sensor harness fault	Ensure a clean fuel supply and check the moisture sensor harness

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

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

Excavator Attachments

The S6D102E-1DD engine powers the PC200-6, PC210-6, and PC220-6 series excavators, which utilize standard quick coupler systems for bucket and breaker tool interchange. Factory configurations for these models typically include reinforced boom and stick options to support high-impact work tools like hydraulic hammers. Hydraulic kit arrangements vary by configuration/series depending on whether the machine is equipped with a standard or high-flow auxiliary circuit for breaker operation.

Wheel Loader Attachments

The WA180-3 and WA250-3 wheel loader series use the S6D102E-1DD engine and are fitted with standard loader buckets ranging from 1.6 to 2.4 cubic meters in capacity. These machines support auxiliary work tools such as pallet forks and grapples via factory-installed auxiliary hydraulic lines. Guarding options include front grille guards and undercarriage protection packages specific to the WA series chassis.

Dozer Attachments

The D41E-6 and D41E-6K bulldozers utilize the S6D102E-1DD engine and are equipped with standard straight or angle dozer blades. Factory configurations may include ripper attachments for soil preparation, mounted to the rear of the chassis. Hydraulic arrangements for dozer attachments are integrated into the main blade lift and tilt circuits without requiring external auxiliary kits.

Grader Attachments

The GD405A-3 and GD521A-1E motor graders use the S6D102E-1DD engine and feature standard moldboards with side-shift capabilities. Optional work tools include scarifiers and wing plows, which require specific hydraulic connections from the main pump. Factory guarding includes cab guards and front bumper protection designed for the GD series frame.

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

Every catalogued assembly group for the Komatsu S6D102E-1DD(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-1dd(S/N 26200929-Up) : Engine : Additional Pulley (Air Ocnditioner Pulley)(#26258773-)

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Air Cleaner (Ordering Transferred Parts)(#26258773-)

60***90	Valve,Dust	1
60***40	Element Assembly, Innner And Outer Air Cleaner	1
60***20	Element Assembly, Outer	1
60***40	Gasket,Wing	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Air Cleaner Cap (Ordering Transferred Parts)(#26258773-)

60***50

Cap

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Air Connector(#26201318-)

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

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

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Alternator (35a) (Brushless Type) (Inner Parts)(#26239465-)

60***11	Alternator A. (35a)	1
KD***70	Bushing,Insulate	1
KD***50	Regulator Ass'Y	1
KD***40	Bushing,Insulate	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Alternator (35a) (Brushless Type)(#26239465-)

(6***1)

Alternator A. (35a),(See Fig.A601p-02a7z)

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Alternator Cover(#26258773-)

01***12	Bolt,(With Speedometer)	2
67***80	Cover	1
67***90	Plate	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Alternator Mounting(#26258773-)

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Belt Tensioner (For 35a Shield Alternator)(#26258773-)

67***40	Tensioner,Belt	1
67***41	Tensioner, Alternator Belt	1
67***20	Bolt (M10x1.50x70)	1
67***20	Capscrew, Flat Head (M8-1.25x25)	2

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Breather And Hose(#26249258-)

07***89	Clamp,(For Japan)	2
67***30	Seal	1
67***30	Bolt, Flange Head (M12-1.75x25)	1
67***60	Clip	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Breather Hose Clip(#26258773-)

01***14	Bolt - Fuel Sensor Mounting	1
61***90	Clip,Breather Hose	2
67***40	Clip	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Camfollower Cover(#26249258-)

67***20	Bolt, Mounting (M8-1.25x16)	4
67***80	Seal, Grommet	4
67***10	Cover	1
67***60	Gasket, Push Rod Cover	1

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

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Caution Plate (English)(#26258773-)

01***20	Bolt - Mount Risers To Cab Floor	2
67***70	Plate,Name	1
67***71	Plate,Name	1
67***30	Plate	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Caution Plate (For Regulation Of Epa)(#26258773-)

01***20	Bolt - Mount Risers To Cab Floor	2
67***70	Plate,Name	1
67***71	Plate,Name	1
67***10	Plate	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Cooling Fan(#26258773-)

01***35	Bolt, Mount Bracket To Floor	4
01***45	Bolt	4
60***50	Fan,Cooling	1
67***10	Spacer	1

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

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

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

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Cylinder Block Blind Cover(#26240889-)

67***20	Bolt, Flange (M8-1.25x20)	2
67***10	Gasket, Cover Plate	1
67***11	Gasket, Cover Plate	1
67***11	Plate, Cover	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Cylinder Block Blind Plug(#26200939-)

67***60

Plug, Expansion (Not Used With Side Oil Fill)

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

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

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

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

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

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

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

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Exhaust Manifold(#26201318-)

67***20

Manifold,Exhaust

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Fan Drive Pulley(#26202285-)

67***20	Support Ass'Y	1
67***30	Pulley, Fan	1
67***70	Bolt, Mounting (M8-1.25x40)	4
67***10	Hub, Fan	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Flywheel Housing Plug And Plate(#26225545-)

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Flywheel Housing(#26239316-)

02***13	Plug	1
67***40	Cover, Rear	1
67***11	Housing,Flywheel	1
67***20	Bolt (M8-1.25x16)	2

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Flywheel(#26258773-)

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

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

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Front Gear Train Cover

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 : S6d102e-1dd(S/N 26200929-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 : S6d102e-1dd(S/N 26200929-Up) : Engine : Fuel Filter Piping(#26258773-)

07***12	Gasket,Injection Pump Piping	4
07***12	Bolt, Joint	2
07***97	Clamp,(With Pre-Fuel Filter)	4
61***40	Tube,Joint	2

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Fuel Hose Joint(#26258773-)

07***12	Gasket,(Without Air Compressor Type) (K1)	3
61***10	Bolt,Joint (High Altitude Spec.)	1
61***10	Connector, Banjo	2
61***50	Connector, Banjo	2

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Fuel Injection Pump (Feed Pump) (For Hydraulic Control System) (Inner Parts)(#26237350-)

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 : S6d102e-1dd(S/N 26200929-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (For Hydraulic Control System) (Inner Parts)(#26237350-)

DK***00	Washer	1
DK***00	Governor Ass'Y	1
DK***00	Shim? 2.00mm,(High Altitude Spec.)	0
DK***00	Shim	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (For Hydraulic Control System) (Inner Parts)(#26237350-)

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (For Hydraulic Control System) (Inner Parts)(#26237350-)

67***10	Injection Pump Ass'Y	1
67***11	Injection Pump Ass'Y	1
DK***30	Bearing	0
DK***20	Shim, 1.40mm; Was Dk029311-7220, Shim? 1.4mm	0

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (For Hydraulic Control System) (Inner Parts)(#26237350-)

DK***40	Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040	0
DK***90	Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590	0
DK***00	Sleeve,Control	6
DK***30	Shim? 1.45mm, Shim, 1.45mm; Was Dk029311-0630	0

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Fuel Injection Pump And Oil Piping (For Hydraulic Control System)(#26237350-)

07***12	Gasket,(Without Air Compressor Type) (K2)	5
07***10	Screw, Banjo Connector (M10-1.25x20)	1
62***10	Seal, O-Ring (M10-1.00)	1
67***50	Connector, Female	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Fuel Injection Pump Mounting And Gear(#26200929-26264836)

01***14	Bolt - Fuel Sensor Mounting	2
01***11	Nut (M14-1.50 Thd), Nut; Was 01582-01411	1
61***61	Washer, Plain (14mm)	1
67***40	Bolt (M10x1.50x20)	1

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

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Fuel Lift Pump (Ordering Transferred Parts)(#26258773-)

67***11

Pump,Suction

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Head Cover(#26258773-)

67***30	Bolt (M8x1.25x25)	6
67***50	Washer, Plain (3/8 Inch)	6
67***60	Cover	1
67***81	Gasket, Valve Cover	6

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Heat Shield(#26258773-)

01***35	Stud	2
01***16	Bolt, Mount Solenoid Valve	2
01***20	Bolt,(Forwarded Individually Parts)	4
01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	4

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Heater Switch (Ordering Transferred Parts)(#25262548-)

60***70

Switch,Air Intake Heater

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

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

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

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Muffler And Mounting (With Safety Plate) (Ordering Transferred Parts)(#26258773-)

01***20	Capscrew	1
01***16	Bolt, Mount Solenoid Valve	6
01***20	Bolt,(Forwarded Individually Parts)	1
01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Muffler And Mounting (Without Safety Plate) (Ordering Transferred Parts)(#26258773-)

01***20	Capscrew	1
01***16	Bolt, Mount Solenoid Valve	6
01***20	Bolt,(Forwarded Individually Parts)	1
01***20	Bolt, Hose Clamps (Inlet And Return Line Hoses)	1

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

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Oil Filler(#26258773-)

01***16	Bolt, Mount Solenoid Valve	1
01***20	Bolt - Mount Risers To Cab Floor	1
01***06	Nut, Regular Hexagon (M8-1.25)	1
61***20	Cap Assembly, Oil Fill Tube	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Oil Gauge(#26258773-)

01***14	Bolt,(W/Joy Stick Str.)(W/O Heater)	1
01***20	Bolt - Mount Risers To Cab Floor	1
01***06	Nut, Regular Hexagon (M8-1.25)	1
67***30	O-Ring,Turbocharger Drain	2

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Oil Pan And Suction Tube(#26258773-)

07***12	Gasket,Oil Pan Drain	1
67***10	Plug, Threaded (M18-1.50 Thd)	1
67***20	Bolt, Flange (M8-1.25x20)	2
67***20	Gasket,Suction Tube	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Oil Pan Mounting(#26249258-)

67***60	Bolt, Mounting (M8-1.25x25)	36
67***80	Washer, Plain (M9)	36
67***11	Gasket, Oil Pan	1

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Oil Pressure Switch(#26222208-)

08***05	Switch,Engine Oil Pressure	1
62***10	Seal, O-Ring (M10-1.00)	1
67***30	Cartridge, Engine Oil Filter	2
67***70	Adaptor	1

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

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

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

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

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

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Rear Hanger(#26258773-)

01***60	Bolt, Mount	2
67***30	Bracket,Lifting	1
67***70	Bracket	1

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

(6***0)

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

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

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Tachometer Adapter(#26217579-)

67***20	Seal, Rectangular Ring	1
67***30	Adapter	1
67***50	Washer	2
67***10	Adapter	1

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

67***12

Tappet, Valve

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

67***20

Thermostat

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Thermostat Housing(#26258773-)

67***40	Bolt, (M8x1.25x35)	1
67***70	Coupling, Plain Hose	1
67***80	Bolt (M8-1.25x70)	2
67***90	Clamp, Hose	2

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

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Turbocharger Oil Piping(#26258773-)

07***59	Clamp - Drain Hose	2
67***80	Connector, Male	2
67***70	Hose, Plain	1
67***20	Bolt, Flange (M8-1.25x20)	2

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

67***10

Plug, Pipe (1/2-14 Npt)

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Water Connector(#26258773-)

67***20	Bolt (M10-1.50x75)	3
67***30	Seal,Water Inlet Connection	1
67***61	Connector	1

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

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

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Komatsu : S6d102e-1dd(S/N 26200929-Up) : Engine : Water Temperature Sensor(#26258773-)

01***14	Bolt,(W/Joy Stick Str.)(W/O Heater)	3
01***30	Bolt,(Water Separator Spec.)	1
08***10	Connector, Clip	1
20***30	Valve,Heat Water Inlet	1

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S6D102E-1DD(S/N 26200929-UP) serial number reference

The engine serial number plate is located on or near the valve cover, typically on the left side of the engine block. The prefix is the alphanumeric code stamped on this plate, identifying the engine model and generation (e.g., S6D102E-1DD).

Prefix	Identifies	Notes
S6D102E-1DD	Standard	S/N 26200929-UP. Factory spec sheet for S6D102E-1DD engine. Fits CD60R-1A S/N 1033-UP and CD60R-1B S/N 1033-UP. Confirmed by published references catalog and Fab Heavy Parts fitment list. No specific plant or year range documented for this exact engine prefix in the provided sources.
S6D102E-1DD-6	Dash-6 Generation	S/N 26200163-UP. Factory spec sheet for S6D102E-1DD-6 engine. Fits CD60R-1 S/N 1033-UP (For North America). Confirmed by Fab Heavy Parts fitment list. No specific plant or year range documented for this exact engine prefix in the provided sources.

Frequently asked questions

What engine does the Komatsu S6D102E-1DD use?

The S6D102E-1DD is a six-cylinder in-line diesel engine, delivering approximately 140 horsepower. It is used in the PC200-6, PC210-6 excavators and WA320 wheel loaders.

What is the operating weight of machines using this engine?

Machines powered by the S6D102E-1DD typically fall in the 20,000 to 60,000 lb operating weight class, with specific models like the PC210-6 weighing approximately 45,194.8 lb.

What replaced the S6D102E-1DD engine?

The S6D102E-1DD was replaced by the SAA6D102E-2 series engine in subsequent generations like the PC200-7 and PC210-7, primarily to meet Tier 3 and Tier 4 emissions standards.

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

What are the known powertrain and hydraulic behaviors for machines using the S6D102E-1DD engine?

The S6D102E-1DD engine is a six-cylinder in-line diesel unit with an overall length of 1,219 mm, width of 770 mm, and height of 934 mm. It is typically paired with hydraulic excavators such as the PC200-6 and PC210-6 series. Common hydraulic behaviors include performance degradation when hot due to viscosity loss in internal pump or valve clearances. Operators report that if all functions slow simultaneously, the issue often lies in the main hydraulic pump, engine RPM, or oil condition rather than individual cylinders. If only one function is slow, diagnosis should focus on the specific cylinder, control valve, or load-holding valve. The machine may also exhibit reduced power under heavy load if air filters, fuel filters, or charge-air hoses are restricted or damaged. Variations in hydraulic pressure and flow exist depending on the specific machine configuration and serial range. Have your dealer verify system pressures against factory specifications for the exact serial prefix.

What undercarriage or wear patterns are typical for this machine type?

Machines equipped with the S6D102E-1DD engine, such as the PC200-6 and PC210-6 excavators, typically operate in the 45,000 lb class. Common undercarriage wear patterns include track loosening due to improper tension or component wear, and side-pulling caused by uneven track tension or debris packed into the undercarriage. Operators should monitor roller condition and track-chain wear, as these directly affect travel speed and stability. The operating weight for these configurations ranges from approximately 45,000 to 46,000 lb, influencing ground pressure and undercarriage stress. Variations in weight and wear rates occur based on attachment package, counterweight, and track shoe width. Have your dealer verify track tension and undercarriage component wear limits.

What are the engine quirks per the S6D102E-1DD series?

The S6D102E-1DD series is part of the Komatsu 102 series engine family. A known quirk is the sensitivity to fuel system maintenance; if the machine stops starting immediately after a filter replacement, air entering the fuel supply or improper priming is a common cause rather than component failure. The engine relies on a robust iron block and turbocharging for performance in applications like wheel loaders and excavators. Cooling system integrity is critical, as packed debris between heat exchangers can cause overheating during heavy work. The engine may produce white smoke if coolant enters the combustion chamber or if the system becomes highly pressurized. Variations in emissions packages and turbo configurations exist across the 102 series. Have your dealer verify the specific emissions tier and turbocharger model for this serial range.

What are common electrical or sensor issues reported?

Common electrical issues include no-crank conditions caused by weak batteries, poor engine/chassis grounds, or faulty starter relays. Voltage collapse under load during starting is a frequent diagnostic trap. Multiple fault codes often point to battery state, ground connections, or connector integrity rather than individual sensor failure. The engine control system relies on accurate inputs for fuel and boost management; air leaks in charge-air hoses or loose clamps can mimic electrical faults by causing power loss. Specific sensor failures are not widely documented as a systemic quirk for the S6D102E-1DD, but general Komatsu excavator troubleshooting emphasizes checking battery load and ground continuity before replacing sensors. Have your dealer verify the wiring harness integrity and sensor calibration.

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

When purchasing a used machine with this engine serial range, verify the exact engine model plate, as the S6D102E-1DD is distinct from variants like the S6D102E-1BB or S6D102E-1C. Check the engine data plate location on or near the valve cover. Inspect the cooling package for debris packed between the radiator, hydraulic oil cooler, and charge-air cooler. Test hydraulic performance cold and hot to identify internal leakage. Verify the fuel system for air leaks, especially if filters were recently replaced. Check the undercarriage for track tension and roller wear. Confirm the operating weight and configuration match the intended application. The engine dimensions are 1,219 mm in length, 770 mm in width, and 934 mm in height. Have your dealer verify the engine serial number against the machine model and check for any specific service bulletins for this serial prefix.

What fluids are specified for the Komatsu S6D102E-1DD engine and related systems?

Komatsu specifies Komatsu EO (Engine Oil), TO (Transmission Oil), AXO (Axle Oil), and HO (Hydraulic Oil) for the S6D102E-1DD engine and associated systems. Super-coolant AF-NAC is recommended for the cooling system. Chevron lubricants may also be used as compatible alternatives, but Komatsu Genuine fluids are the primary specification. The exact capacity varies by machine configuration and serial range. Have your dealer verify the specific fluid capacities and specifications for the exact machine model.

What is the typical operating weight and power output for machines using this engine?

Machines using the S6D102E-1DD engine, such as the PC200-6 and PC210-6 excavators, typically have an operating weight of approximately 45,195 lb (20,500 kg) and deliver around 140 hp (104 kW). The engine is a six-cylinder in-line diesel. Variations in weight and power output exist based on the specific machine model, attachment package, and regional emissions configuration. Have your dealer verify the exact specifications for the machine with serial number 26200929-UP.

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

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