Komatsuengine(no series)

Komatsu S6D95L-1W(S/N 15060-UP)

Maintenance schedule, common problems & OEM parts breakdown

The Komatsu S6D95L-1W engine (serial 15060-UP) is a 6-cylinder, water-cooled diesel powerplant belonging to the 95 Series family. It delivers 110 HP at 2,000 rpm with a maximum torque of 41.5 kgm at 1,500 rpm. This engine is primarily installed in the FD60H, FD70H, and FD80H-5 series of Komatsu forklifts and heavy material handlers. It succeeded earlier 95 Series variants and is characterized by its compact inline configuration, Bosch VE distributor-type fuel pump, and mechanical all-speed governor. The engine weighs approximately 425 kg (937 lb) dry and features a 95 mm bore and 115 mm stroke.

Across the 95 Series lineage, the S6D95L-1W represents a mature generation of Komatsu industrial engines designed for high-torque durability in stationary and low-speed heavy-duty applications. Unlike the S6D102E series used in modern Tier 4 excavators, the S6D95L-1W lacks modern emissions aftertreatment (DPF/SCR), making it highly sought after in the used market for retrofit projects, marine applications, and regions with less stringent emissions regulations. Its simple mechanical fuel system and robust cast-iron block ensure long service life and ease of repair, sustaining high demand for replacement parts and rebuild kits in the secondary market.

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 S6D95L-1W(S/N 15060-UP) specifications

Engine

ModelS6D95L-1 (per factory spec sheet for S6D95L-1W S/N 15060-UP)
Gross Power110 HP (82 kW) @ 2,000 rpm
Net Power110 HP (82 kW) @ 2,000 rpm
Displacement4,890 cm³ (4.89 L)
Cylinders6 in-line
Emissions TierTier 1 / Stage II (per rebuilt engine documentation)

Weights

Operating WeightNot documented for this exact serial range — verify with your dealer
Shipping WeightNot documented for this exact serial range — verify with your dealer
Ground PressureNot documented for this exact serial range — verify with your dealer

Dimensions

Transport LengthNot documented for this exact serial range — verify with your dealer
Transport WidthNot documented for this exact serial range — verify with your dealer
Transport HeightNot documented for this exact serial range — verify with your dealer
Track GaugeNot documented for this exact serial range — verify with your dealer
Ground ClearanceNot documented for this exact serial range — verify with your dealer

Performance

Travel SpeedsNot documented for this exact serial range — verify with your dealer
Lift/Dig/Dump/DrawbarNot documented for this exact serial range — verify with your dealer
GradeabilityNot documented for this exact serial range — verify with your dealer

Service capacities (summary)

Fuel TankNot documented for this exact serial range — verify with your dealer
Hydraulic SystemNot documented for this exact serial range — verify with your dealer
Engine Oil11 L (2.9 gal)
Cooling System8.5 L (2.2 gal)

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

S6D95L-1W(S/N 15060-UP) fluids & capacities

SystemCapacityRecommended fluid
Engine crankcase (with filter)16.5 liters (4.4 US gal)Komatsu EO-10 or EO-15; API CF grade 15W-40 diesel engine oil
Cooling systemNot documented for this exact serial range — verify with your dealerKomatsu Super Coolant AF-NAC
Fuel tankNot documented for this exact serial range — verify with your dealerUltra-low sulfur diesel fuel
Transmission/powertrain compartmentsNot documented for this exact serial range — verify with your dealerKomatsu TDTO-IV or Komatsu HO-1
Final drives (each)Not documented for this exact serial range — verify with your dealerKomatsu AXO-50 or Komatsu HO-1
Hydraulic system AND tankNot documented for this exact serial range — verify with your dealerKomatsu HYDO-III or Komatsu UDT-2
Axles/differentialsNot documented for this exact serial range — verify with your dealerKomatsu AXO-50 or API GL-5 80W-90 gear oil
GreaseN/AKomatsu Lithium Complex Grease or equivalent NLGI #2

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

Komatsu S6D95L-1W(S/N 15060-UP) maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level and condition.
  • Check hydraulic fluid level at sight glass.
  • Check coolant level and ensure cap is secure.
  • Check fuel level and drain water from separator.
  • Check air filter restriction indicator.
  • Inspect hydraulic hoses for cracks or leaks.
Every 250 h
  • Change engine oil and replace filter.
  • Grease all lubrication points (boom, stick, bucket, swing bearing).
  • Check fluid levels across all systems.
  • Inspect air filter outer element.
  • Inspect belts and hoses for wear.
  • Perform visual walk-around inspection.
Every 500 h
  • Replace fuel filter.
  • Replace hydraulic return filter.
  • Service battery and check terminals.
  • Test coolant SCA concentration.
  • Collect KOWA oil sample for analysis.
  • Perform detailed undercarriage inspection.
Every 1,000 h
  • Collect hydraulic oil sample for analysis.
  • Check final drive oil level.
  • Inspect turbocharger condition.
  • Check valve adjustment clearances.
  • Perform structural inspection of boom and stick.
  • Replace air filter outer element if dirty.
Every 2,000 h
  • Change hydraulic system oil.
  • Flush and replace coolant.
  • Service transmission or torque converter oil.
  • Perform comprehensive component evaluation.
  • Check KDPF condition (if equipped).
  • Replace worn belts and clamps.

Servicing the S6D95L-1W(S/N 15060-UP) beyond the schedule

Predictive Maintenance & Fluid Analysis

Integrate KOWA fluid analysis into every 500-hour service interval to monitor wear metals (iron, copper, lead) and contaminants (silicon, sodium). Check coolant SCA concentration at 500 hours to prevent liner cavitation. Monitor hydraulic oil particle count and viscosity at 1,000 hours to detect pump or valve wear. Use KOMTRAX telematics to track load frequency and fault codes, identifying abnormal fuel consumption or exhaust temperatures that signal impending turbocharger or injector issues before failure occurs.

Corrective & Common Repairs

Address frequent S6D95L-1W issues by inspecting the Bosch VE distributor fuel pump for internal wear or governor linkage binding. Check the turbocharger shaft play and diaphragm integrity, as boost compensator failure causes poor acceleration and black smoke. Replace worn piston rings and cylinder liners if compression drops or oil consumption exceeds limits. Inspect the mechanical all-speed governor for spring fatigue or ball wear. Verify electrical connections on the 24V, 15A alternator and starter motor for corrosion or loose terminals.

Overhaul & Rebuild Points

Plan major overhaul at 10,000–15,000 hours or when bore wear exceeds 0.05 mm. Replace cylinder liners, pistons, and connecting rods if scoring or taper is detected. Inspect the crankshaft for journal wear and replace if out of specification. Rebuild the fuel injection pump with new internal seals and check valve seats. Replace the turbocharger if shaft runout exceeds limits or housing cracks. Refinish the cylinder head and replace valve guides and seats if leakage is present.

Seasonal & Environment Servicing

In cold climates, use low-viscosity engine oil and ensure the coolant mixture provides adequate freeze protection. Check the air intake heater or glow plug system for proper operation. In dusty environments, clean the radiator and oil cooler fins daily to prevent overheating. Inspect the air filter element more frequently and replace if restriction indicator shows high load. In high-humidity areas, check the fuel water separator daily and drain accumulated water to prevent microbial growth and injector corrosion.

S6D95L-1W(S/N 15060-UP) common service parts

Part numberPart
07281-00197Clamp,(With Pre-Fuel Filter)Check fitment →
600-311-1190Plate? Caution,Fuel FilterCheck fitment →
600-311-6220Cartridge,Fuel FilterCheck fitment →
600-311-9600Fuel Filter Ass'YCheck fitment →
09637-02161Plate? Instruction,Air Cleaner (Double Element)Check fitment →

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

S6D95L-1W(S/N 15060-UP) fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
CA115Engine crankshaft speed sensor failureBroken sensor, wiring issue, or connector corrosionReplace the speed sensor and verify the voltage at the pin connector
CA111Internal engine controller faultECM internal abnormalityReplace or reprogram the ECM
CA441Battery voltage too lowWeak battery or charging system failureReplace the battery or alternator; check the voltage regulator
CA442Battery voltage too highAlternator overcharging or regulator failureReplace the alternator or battery; check the voltage regulator
CA122Intake air pressure high voltageSensor malfunction or actual overpressure conditionVerify the intake pressure sensor and wiring
CA123Intake air pressure low voltageSensor short or airflow restrictionCheck for a sensor short or an airflow restriction
CA451Common rail pressure sensor feedback value too highMalfunction in the rail sensor or actual overpressure conditionDiagnose the fuel rail pressure sensor or pump lines
CA452Common rail pressure sensor feedback value too lowSensor malfunction or low fuel pressureDiagnose the fuel rail pressure sensor or pump lines
CA234Engine overspeedThrottle calibration error, engine load cycle issue, or operator misuseVerify throttle calibration, engine load cycle, or operator misuse
AA10NXAir cleaner cloggingDirty or blocked air filter elementReplace the air filter

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

S6D95L-1W(S/N 15060-UP) attachments & work tools

Excavator Buckets

Standard and heavy-duty digging buckets are the primary work tools for this engine class, typically ranging from 0.5 to 0.8 cubic meters (0.65 to 1.05 cubic yards) depending on the specific carrier model (e.g., PC200-5, PC220-5). These buckets utilize a standard pin-on coupling system with side-cutting edges and teeth designed for general excavation and loading operations.

Grading and Dozing Blades

Motor graders equipped with this engine family (e.g., GD511A-1) utilize moldboard blades with widths typically between 3.5 and 4.0 meters (11.5 to 13.1 feet). These blades are mounted via a rigid frame and require auxiliary hydraulic circuits for tilt, angle, and pitch adjustments to maintain grading precision.

Hydraulic Breakers

Hydraulic hammers are a common attachment, requiring a dedicated high-flow hydraulic kit installed on the carrier machine. The breaker's flow and pressure requirements must match the engine's hydraulic pump output to ensure effective impact energy without damaging the carrier's hydraulic system.

Hydraulic Hoses and Couplers

Attachment compatibility relies on standard quick-coupler systems (often proprietary or industry-standard pin-type) for hydraulic lines. Factory configurations include reinforced high-pressure hoses and protective routing to prevent abrasion during heavy-duty work tool engagement and disengagement.

Engine Guarding and Options

Factory options include heavy-duty air pre-cleaners and dust seals for high-dust environments, as well as extended-life oil filters. Cooling system guarding includes robust radiator screens and debris guards to protect the water-cooled engine's heat exchanger from damage during work tool operations in confined or debris-heavy sites.

All S6D95L-1W(S/N 15060-UP) assemblies by section

Every catalogued assembly group for the Komatsu S6D95L-1W(S/N 15060-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Accessory
Komatsu : S6d95l-1w(S/N 15060-Up) : Accessory : Air Compressor
62***00Air Compressor Ass'Y1
DK***21Cylinder Head Ass'Y1
DK***00Bearing2
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Komatsu : S6d95l-1w(S/N 15060-Up) : Accessory : Air Compressor And Piping
07***16Gasket,Air Compressor Piping1
07***89Clamp,(For Japan)2
08***36Band,(For 2nd Travel Speed) (Op)1
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Cooling System
Komatsu : S6d95l-1w(S/N 15060-Up) : Cooling System : Water Pump And Cooling Fan (For 35a Alternator)(#36830-)
01***35Bolt,(For Quick Shift) (Mitsubishi)6
01***16Screw5
01***20Screw2
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cooling System : Water Pump And Cooling Fan (Noise Suppression Spec.)(#36830-)
01***35Bolt,(For Quick Shift) (Mitsubishi)6
01***16Screw5
01***20Screw2
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cooling System : Water Pump And Cooling Fan(#36830-)
01***35Bolt,(For Quick Shift) (Mitsubishi)6
01***16Screw5
01***20Screw2
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Cylinder Block
Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Block : Camshaft And Tappet
01***20Screw2
04***16Fitting Wedge1
62***10Tappet12
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Block : Crankshaft
01***45Bolt,Nylock1
01***16Bolt,(With Alternator Cover Type)6
61***11Bolt,Nylock (K2)1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Block : Cylinder Block(#36830-)
01***16Screw1
01***06Nut1
01***10Washer,See Fig. K4010-12a01
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Block : Flywheel And Flywheel Housing(#36830-68132)
01***30Bolt6
01***30Bolt - Lower Oil Cooler Outlet Tubemounting11
07***15Plug1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Block : Flywheel And Flywheel Housing(#68133-)
01***30Bolt6
01***30Bolt - Lower Oil Cooler Outlet Tubemounting11
07***16Gasket,(For Pc750-6) (See Fig.A2110)1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Block : Front Cover And Gear
01***70Bolt,(For 75a Alternator)1
01***20Bolt,(With Tachometer Outlet)2
01***16Screw2
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Block : Oil Pan(#36830-72217)
01***14Bolt,(W/Joy Stick Str.)(W/O Heater)30
01***14Bolt30
07***16Gasket,(For Pc750-6) (See Fig.A2110)1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Block : Oil Pan(#72218-)
01***14Bolt,(W/Joy Stick Str.)(W/O Heater)30
01***14Bolt2
07***30O-Ring,Case? Magnet Ass'Y1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Block : Piston And Connecting Rod
04***12Ring, Snap12
62***10Bolt2
62***20Piston (S)6
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Block : Power Take Off
(0***5)Ring,Snap1
(0***5)Bolt,(With Water Separator)3
(2***0)Coupling1
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Cylinder Head
Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Head : Air Cleaner
04***10Ring,See Fig. K4010-65a01
09***61Plate? Instruction,(Japanese-English) (Not Shown)1
09***61Plate? Instruction,Air Cleaner (Double Element)1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Head : Air Intake Manifold And Connection(#15060-42686)
01***12Bolt2
01***20Bolt,(For Japan Pc200)2
01***25Bolt,(With Corrosion Resistor)1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Head : Air Intake Manifold And Connection(#42687-)
01***12Bolt2
01***20Bolt,(For Japan Pc200)2
01***25Bolt,(With Corrosion Resistor)1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Head : Cylinder Head
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)4
01***32Washer, (Without Emergency Steering)25
02***04Plug, Pipe1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Head : Cylinder Head Cover
01***20Bolt,(For Japan Pc200)1
04***50Screw4
07***80Clamp, Drain Hose3
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Head : Exhaust Manifold And Turbocharger
01***25Grub Screw4
01***90Bolt,(For Large Fan)11
01***95Bolt,(For Shipping)1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Head : Muffler (Noise Suppression Spec.)(#36830-)
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)3
01***25Bolt, Mount Engine Oil Drain To Fuel Tank4
01***35Bolt,R.H. (For Add. Air Compressor)2
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Head : Muffler(#36830-)
01***80Bolt, Mount Strainer Flange1
01***20Bolt, Hose Clamps (Inlet And Return Line Hoses)3
01***25Bolt, Mount Engine Oil Drain To Fuel Tank4
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Head : Rocker Arm
01***12Bolt,(Without R.P.C.U.)1
01***65Bolt,(For Alternator Bracket Mount)8
61***30Nut12
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Komatsu : S6d95l-1w(S/N 15060-Up) : Cylinder Head : Turbocharger
62***20Turbocharger Ass'Y,(Ta3103)1
GA***16Bolt6
GA***63Housing,Turbine1
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Electrical System
Komatsu : S6d95l-1w(S/N 15060-Up) : Electrical System : Alternator (25a)(#19953-)
60***30Alternator A. (25a),(With Non Hardening Pulley)1
KD***57Bearing,Ball? Front1
KD***11Rear Bracket Ass'Y1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Electrical System : Alternator (35a)(#36830-)
60***40Alternator A. (35a),(With Hardening Pulley)1
KD***57Bearing,Ball? Front1
KD***80Collar1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Electrical System : Alternator And Mouting (25a)
01***30Bolt,(For Trimming Dozer)1
01***55Bolt,(With Engine Stop Motor Type)1
01***11Nut,(For Center Guard)1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Electrical System : Alternator And Mouting (35a)(#36830-)
01***30Bolt,(For Trimming Dozer)1
01***70Bolt1
01***10Nut,(Dust?Drip Proof? Trimming S.)1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Electrical System : Starting Motor (5.5kw)
60***20Starting Motor Ass'Y,(5.5kw)1
KD***30Bracket,Center1
KD***20Cneter Bracket A1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Electrical System : Starting Motor And Mounting
01***30Bolt2
07***05O-Ring,(Not Used With Emergency Str.) (K2)1
(6***0)Starting Motor Ass'Y,(5.5kw) (See Fig.A6210-B0c2)1
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Engine Kit
Komatsu : S6d95l-1w(S/N 15060-Up) : Engine Kit : Gasket Kit
01***16Washer,Lock? Injection Gear1
07***85O-Ring,(Without Fuel Level Gauge)1
07***05O-Ring,(Not Used With Emergency Str.) (K2)1
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Fuel System
Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Filter And Piping
01***12Bolt1
01***16Screw1
01***20Bolt2
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Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Injection Pump (Coupling)(#36830-83954)
DK***20Plate1
DK***00Bolt2
DK***00Bolt1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Injection Pump (Coupling)(#83955-)
DK***20Plate1
DK***00Bolt2
DK***00Bolt1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Injection Pump (Feed Pump)(#36830-83954)
DK***20Bolt, Joint1
DK***00Valve,Check2
DK***20Pump,Priming1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Injection Pump (Feed Pump)(#83955-)
DK***20Bolt, Joint1
DK***00Valve,Check2
DK***10Feed Pump Ass'Y,(Not Shown)1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#36830-83954)
DK***00Shim? 2.00mm,(High Altitude Spec.)0
DK***00Adapter1
DK***00Nut,Lock1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#83955-)
DK***00Shim? 2.00mm,(High Altitude Spec.)0
DK***00Adapter1
DK***00Nut,Lock1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#36830-83954)
DK***40Gasket,Air Compressor2
DK***00Nut,Cap1
DK***20Cover1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#83955-)
DK***40Gasket,Air Compressor2
DK***00Nut,Cap1
DK***20Cover1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2)(#36830-83954)
62***70Injection Pump Ass'Y1
DK***30Key,Woodruff1
DK***30Bearing0
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Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2)(#83955-)
62***71Injection Pump Ass'Y1
DK***30Key,Woodruff1
DK***30Bearing0
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Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2)(#36830-83954)
DK***40Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-00400
DK***90Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-05900
DK***00Sleeve,Control6
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Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2)(#83955-)
DK***40Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-00400
DK***90Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-05900
DK***00Sleeve,Control6
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Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Injection Pump And Piping(#36830-)
01***25Bolt, Mount Engine Oil Drain To Fuel Tank4
01***25Screw4
01***65Bolt,(For 35a? 25a Alternator)4
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Komatsu : S6d95l-1w(S/N 15060-Up) : Fuel System : Fuel Nozzle And Spill Pipe
01***35Bolt, Mount Bracket To Floor6
07***10Tube,(See Fig.0421-14)5
07***35Tube,Spill1
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Lubricating Oil System
Komatsu : S6d95l-1w(S/N 15060-Up) : Lubricating Oil System : Lubricating Oil Cooler(#15060-52245)
01***25Bolt,(With Corrosion Resistor)18
01***06Nut4
01***06Nut4
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Komatsu : S6d95l-1w(S/N 15060-Up) : Lubricating Oil System : Lubricating Oil Cooler(#52246-)
01***25Bolt,(With Corrosion Resistor)18
01***06Nut4
07***12T/Plug, Plug,(For Power Tilt Mech Angle)1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Lubricating Oil System : Lubricating Oil Filter
60***40Cartridge,Engine Oil Filter (D31s)1
60***41Cartridge,Engine Oil Filter (D31s)1
60***60Plate? Caution,(Arabic-English)1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Lubricating Oil System : Lubricating Oil Pump And Suction Pipe
01***12Bolt,(See Fig.0501)1
01***16Screw6
01***25Bolt,(With Corrosion Resistor)1
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Komatsu : S6d95l-1w(S/N 15060-Up) : Lubricating Oil System : Turbocharger Lubricating Oil Piping(#36830-)
01***16Screw5
01***20Screw4
01***06Nut1
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S6D95L-1W(S/N 15060-UP) serial number reference

The PIN plate is located on the right-hand side of the cab on the lower frame, typically just behind the front idler or beneath the operator's window. Read the three-character prefix at the start of the 17-character ISO PIN to identify the engine family and generation.

PrefixIdentifies
S6D95L-1Base model

Frequently asked questions

What is the engine type and configuration?

The S6D95L-1W is a 6-cylinder, inline, water-cooled diesel engine with a 95 mm bore and 115 mm stroke. It produces 110 HP at 2,000 rpm and uses a Bosch VE distributor-type fuel pump with a mechanical all-speed governor.

What is the operating weight of the machine?

Operating weight varies by configuration and attachment package. The engine itself weighs approximately 425 kg (937 lb) dry. Machine weight ranges from 9,182 lb to 87,083 lb depending on the specific FD60H/70H/80H-5 model and installed components.

What replaced the S6D95L-1W engine?

The S6D95L-1W was succeeded by newer Komatsu engine series such as the S6D102E and SAA6D107E families, which incorporate modern emissions control technologies like DPF and SCR to meet Tier 4 Final and EU Stage V regulations. These newer engines feature electronic fuel injection and higher displacement.

What S6D95L-1W(S/N 15060-UP) owners discuss

What is the net horsepower and maximum torque rating for the S6D95L-1 engine?
The S6D95L-1 engine produces 110 HP at 2,000 RPM with a maximum torque of 41.5 kgm at 1,500 RPM. Variations exist for the 6D95L-1 variant, which is rated at 90 HP at 2,250 RPM or 95 HP at 2,250 RPM depending on the specific configuration. Torque for the 6D95L-1 ranges from 30 kgm to 32 kgm at 1,500 RPM. These figures vary by configuration/series.
What are the known powertrain and hydraulic behaviors associated with this engine series?
The engine utilizes a mechanical fuel injection system with a boost compensator to improve exhaust color and turbocharger performance during acceleration. The engine is water-cooled and relies on Komatsu EO or TO hydraulic oil specifications. Owners report that hydraulic weakness when hot often indicates internal pump or valve leakage rather than pump failure alone. Engine performance issues, such as power loss under load, are frequently linked to airflow restrictions or fuel delivery components rather than the engine block itself.
What undercarriage or wear patterns are typical for machines powered by this engine?
Machines equipped with this engine class commonly experience undercarriage wear patterns including track-chain elongation, roller degradation, and track tensioner failure. Operators report that machines may pull to one side due to uneven track tension or debris packing in the undercarriage. Regular inspection of track tension and roller condition is required to prevent repeated loosening and excessive wear.
What are the common engine quirks per the S6D95L-1 series?
The S6D95L-1 series is prone to valve clearance drift and improper torque leading to bearing wear or head gasket issues. The engine requires precise torque on main bearings, rod bearings, head bolts, and rocker shafts to prevent failure. Valve clearance must be checked cold using feeler gauges. Improper clearance leads to poor engine performance. The engine is a 4.9-liter inline-6 configuration.
What are the common electrical or sensor issues reported by operators?
Operators report intermittent starting, dashboard failure, and random shutdowns linked to unstable power supplies or faulty sensors. The machine relies on electronic control systems where a single faulty sensor can trigger multiple warning signals. Owners should check battery state of charge, battery terminals, engine and chassis grounds, and main starter cables if the engine will not start. Fault codes should be read to diagnose electrical issues.
What should be checked when buying a used machine with the S6D95L-1W(S/N 15060-UP) engine?
Verify the exact serial-prefix specification sheet and installed attachment package. Check the engine oil capacity, which is 16.5 liters (4.4 gallons). Inspect the cooling package for packed material between heat exchangers. Test hydraulic performance cold and hot to identify internal leakage. Check for intermittent starting or dashboard failures. Verify the engine serial number matches the machine documentation. Have your dealer verify the exact serial range specifications and fluid capacities.

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

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