Komatsuengine(no series)
Komatsu 6D95L-1L(S/N 10001-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu 6D95L-1L engine is a 4-cycle, water-cooled, direct injection diesel powerplant used in Komatsu heavy machinery including forklifts (FD35/40/45 series), compact excavators (SD23/25 series), and other construction equipment. It features an in-line 6-cylinder configuration with a bore and stroke of 95 mm x 115 mm, resulting in a total displacement of 4,890 cm³. The engine produces flywheel horsepower ranging from 82 HP at 2,150 rpm to 95 HP at 2,250 rpm depending on the specific application and fuel pump type (Bosch PE5 or VE). It delivers maximum torque between 28 kgm and 32 kgm at 1,500 rpm. The engine is mechanically governed with a Bosch RSV centrifugal all-speed governor and utilizes a dry weight of approximately 360 to 370 kg. It is designed for Tier 1 and Tier 2 emissions compliance in its original configuration.
The 6D95L-1L engine belongs to the Komatsu 95 Series family, succeeding earlier 4D95 and 6D95 variants while being succeeded by the SAA6D95LE series in later Tier 3 and Tier 4 models. The 'L' designation typically denotes a specific configuration variant, often associated with forklift or specific industrial applications within the S/N 10001-UP range. In the used and parts market, this engine is highly valued for its mechanical simplicity and durability, particularly in older FD series forklifts and SD series compact excavators. Its robust cast iron block and straightforward mechanical fuel injection system make it a reliable choice for rebuild and replacement in legacy Komatsu fleets where electronic complexity is a liability. The engine's widespread use in forklifts and compact equipment ensures a steady supply of aftermarket parts and a large base of technical knowledge for mechanics.
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 6D95L-1L(S/N 10001-UP) specifications
Engine
| Model | 6D95L-1 |
| Gross/Net Power | 82 HP (61 kW) @ 2,150 rpm; 85 HP (63 kW) @ 2,150 rpm; 90 HP (67 kW) @ 2,250 rpm; 95 HP (71 kW) @ 2,250 rpm; 110 HP (82 kW) @ 2,000 rpm |
| Displacement | 4.890 L (4,890 cm³) |
| Cylinders | 6 in-line |
| Bore x Stroke | 95 mm x 115 mm |
| Emissions Tier | Tier 1 / Stage II |
Weights
| Engine Dry Weight | 345–425 kg (761–937 lb) |
Dimensions
| Overall Length | 983–986 mm (38.7–38.8 in) |
| Overall Width | 586–637 mm (23.1–25.1 in) |
| Overall Height | 809–876 mm (31.9–34.5 in) |
Performance
| Maximum Torque | 28 kgm (203 ft·lbf) @ 1,500 rpm; 30 kgm (217 ft·lbf) @ 1,500 rpm; 32 kgm (231 ft·lbf) @ 1,500 rpm; 41.5 kgm (300 ft·lbf) @ 1,500 rpm |
| High Idling Speed | 2,200–2,500 rpm |
| Low Idling Speed | 700 rpm |
| Minimum Fuel Consumption | 160 g/HPh |
Service capacities (summary)
| Lubricating Oil Capacity | 11–13 L (2.9–3.4 US gal) |
| Coolant Capacity | 7.5–18 L (2.0–4.8 US gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Komatsu 6D95L-1L(S/N 10001-UP) maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the 6D95L-1L(S/N 10001-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize KOWA fluid analysis at every 500-hour interval to monitor engine wear metals (iron, copper, lead, aluminum) and contaminants like silicon (dirt) and sodium (coolant). Check hydraulic oil particle count and viscosity at 1,000 hours to detect pump or valve wear. Monitor coolant pH, SCA concentration, and glycol content at 2,000 hours to prevent corrosion and scaling. Track fuel dilution and soot levels in engine oil to assess combustion efficiency and filter performance. Early detection of coolant ingress or fuel dilution prevents catastrophic bearing failure and liner corrosion.
Corrective & Common Repairs
Address hard starting by inspecting the Bosch PE5 or VE fuel injection pump for wear and checking the mechanical all-speed governor linkage. Replace worn turbocharger bearings if exhaust smoke increases or boost pressure drops, noting the turbo weighs approximately 7.0 kg. Inspect the cylinder head gasket for leaks if coolant loss is observed without external signs. Check the 24V starter motor (4.5 kW) and 24V alternator (15A or 25A) for brush wear and bearing noise. Replace worn piston rings if compression drops, indicated by excessive blow-by or oil consumption.
Overhaul & Rebuild Points
Rebuild the engine when cylinder liner wear exceeds limits or crankshaft journal wear is detected. Measure piston-to-liner clearance and connecting rod end play during disassembly. Replace the cylinder head assembly (approx. 41 kg) if warping or valve seat damage is found. Inspect the crankshaft assembly (approx. 35.5 kg) for main bearing wear and timing gear backlash. Replace the camshaft assembly (approx. 8.5 kg) if lobe wear affects valve timing. Ensure all fasteners are torqued to OEM specifications during reassembly to prevent head gasket failure.
Seasonal & Environment Servicing
In cold climates, check coolant freeze protection and use appropriate viscosity engine oil to ensure cold starting. Drain the fuel water separator daily to prevent ice formation in the lines. In dusty environments, inspect the air filter restriction indicator frequently and clean or replace the outer element at 1,000 hours. Check the radiator and oil cooler fins for debris buildup to maintain cooling efficiency. In high-temperature environments, monitor coolant levels more frequently and check for signs of overheating or thermal stress on the cylinder head and block.
6D95L-1L(S/N 10001-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 600-311-9200 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| 09637-02161 | Plate? Instruction,Air Cleaner (Double Element) | Air intake service | Check fitment → |
| 09637-30262 | Plate? Instruction,Air Cleaner (Double Element) | Air intake service | Check fitment → |
| 07000-02135 | O-Ring,Hydraulic Oil Filter | Hydraulic service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
6D95L-1L(S/N 10001-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 failure, or voltage regulator issue | Replace the alternator or battery; check the voltage regulator |
| AA10NX | Air cleaner clogging | Dirty or blocked air filter element | Replace the air filter |
| CA122 | Intake air pressure high voltage | Intake pressure sensor malfunction or wiring issue | Verify the intake pressure sensor and wiring |
| CA153 | Intake air temperature sensor high voltage | Intake air temperature (IAT) sensor error | Replace or test the IAT sensor |
| 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 | Fuel supply contamination or moisture 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.
6D95L-1L(S/N 10001-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) in volume. These tools mount via a standard pin-on coupler system and require auxiliary hydraulic lines for the quick-attach mechanism and optional thumb cylinders.
Dozer Blades
Semi-U and straight dozer blades are the standard configurations for machines in this power class, with blade widths typically between 3.0 and 3.5 meters (9.8 to 11.5 feet). Mounting utilizes a fixed or semi-blade carrier system, and operation relies on the machine's main hydraulic circuit for tilt and angle adjustments.
Grader Blades
Moldboard blades for motor graders in this class generally measure 3.0 to 3.3 meters (9.8 to 10.8 feet) in width. The blade mounts to a moldboard carrier with a drawbar connection, and hydraulic controls manage the blade's pitch, roll, and side-shift functions.
Hydraulic Breakers
Medium-duty hydraulic breakers are compatible with this engine class, typically requiring a flow rate of 150 to 200 liters per minute (40 to 53 gallons per minute) at 150 to 180 bar (2,175 to 2,610 psi). Installation requires a dedicated pilot-operated control valve kit and high-pressure hose assemblies to connect to the auxiliary hydraulic circuit.
Factory Guarding Options
Factory-installed guarding options include the Falling Object Protective Structure (FOPS) and Falling Object Guard (FOG) for the operator's cab, as well as the Guarded Operator's Station (GOS) for open-frame machines. These configurations are integrated into the chassis and cab mounting points during the initial assembly phase.
All 6D95L-1L(S/N 10001-UP) assemblies by section
Every catalogued assembly group for the Komatsu 6D95L-1L(S/N 10001-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Cooling System
Komatsu : 6d95l-1l(S/N 10001-Up) : Cooling System : Corrosion Resistor And Piping (Except Japan)
| 01***95 | Bolt,(For Shipping) | 2 |
| 01***40 | Bolt | 2 |
| 01***65 | Bolt,(With Water Separator) | 2 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cooling System : Corrosion Resistor And Piping (High Altitude Spec.)(#10001-27355)
| 01***95 | Bolt,(For Shipping) | 2 |
| 01***40 | Bolt | 2 |
| 01***65 | Bolt,(With Water Separator) | 4 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cooling System : Corrosion Resistor And Piping (High Altitude Spec.)(#27356-)
| 01***40 | Bolt | 2 |
| 01***60 | Bolt | 2 |
| 01***85 | Bolt | 2 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cooling System : Water Pump And Cooling Fan (Hardening Pulley Type) (Except Japan)
| 01***16 | Screw | 5 |
| 01***20 | Screw | 2 |
| 01***30 | Bolt,(Water Separator Spec.) | 6 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cooling System : Water Pump And Cooling Fan (Non Hardening Pulley Type) (Except Japan)
| 01***16 | Screw | 5 |
| 01***20 | Screw | 2 |
| 01***30 | Bolt,(Water Separator Spec.) | 6 |
Cylinder Block
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Block : Camshaft And Tappet
| 01***20 | Screw | 2 |
| 04***16 | Fitting Wedge | 1 |
| 62***10 | Tappet | 12 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Block : Crankshaft (Hardening Pulley Type) (Except Japan)
| 01***45 | Bolt,Nylock | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 6 |
| 61***11 | Bolt,Nylock (K2) | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Block : Crankshaft (Non Hardening Pulley Type)
| 01***45 | Bolt,Nylock | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 6 |
| 61***11 | Bolt,Nylock (K2) | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Block : Cylinder Block
| 01***12 | Bolt | 2 |
| 01***16 | Screw | 4 |
| 01***20 | Bolt,(For Japan Pc200) | 2 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Block : Cylinder Block (Cold Terrain Spec.)
| 01***12 | Bolt | 2 |
| 01***16 | Screw | 4 |
| 01***25 | Bolt,(With Corrosion Resistor) | 4 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Block : Flywheel And Flywheel Housing
| 01***30 | Bolt | 6 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 11 |
| 01***35 | Bolt, Mount Bracket To Floor | 16 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Block : Front Cover And Gear
| 01***70 | Bolt,(For 75a Alternator) | 1 |
| 01***16 | Bolt | 2 |
| 01***20 | Bolt,(With Tachometer Outlet) | 8 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Block : Oil Pan
| 01***16 | Bolt, Mount Solenoid Valve | 29 |
| 01***30 | Bolt,(Water Separator Spec.) | 1 |
| 01***16 | Screw | 30 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Block : Oil Pan (Cold Terrain Spec.)
| 01***16 | Bolt, Mount Solenoid Valve | 27 |
| 01***30 | Bolt,(Water Separator Spec.) | 1 |
| 01***16 | Screw | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Block : Oil Pan (High Altitude Spec.)
| 01***16 | Bolt, Mount Solenoid Valve | 28 |
| 01***30 | Bolt,(Water Separator Spec.) | 2 |
| 01***16 | Screw | 30 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Block : Piston And Connecting Rod
| 04***12 | Ring, Snap | 12 |
| 62***21 | Piston (S) | 6 |
| 62***00 | Piston Ring Ass'Y,Per Cylinder | 6 |
Cylinder Head
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Air Cleaner And Mounting (High Altitude Spec.)(#10001-27355)
| 01***25 | Grub Screw | 2 |
| 01***16 | Screw | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Air Cleaner And Mounting (High Altitude Spec.)(#27356-29444)
| 01***25 | Grub Screw | 2 |
| 01***16 | Screw | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Air Cleaner And Mounting (High Altitude Spec.)(#29445-)
| 01***25 | Grub Screw | 2 |
| 01***16 | Screw | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Air Cleaner And Mounting(#10001-25983)
| 01***25 | Grub Screw | 4 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Screw | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Air Cleaner And Mounting(#25984-)
| 01***25 | Grub Screw | 2 |
| 01***16 | Screw | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Air Cleaner And Nounting (Tbg Spec.)(#26080-)
| 01***25 | Grub Screw | 2 |
| 01***06 | Nut | 6 |
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Air Intake Manifold And Connection (High Altitude Spec.)(#10001-42161)
| 01***50 | Bolt | 1 |
| 01***30 | Screw | 11 |
| 01***70 | Bolt | 4 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Air Intake Manifold And Connection (High Altitude Spec.)(#42162-)
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 01***30 | Screw | 9 |
| 01***70 | Bolt | 4 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Air Intake Manifold And Connection(#10001-26079)
| 01***50 | Bolt | 1 |
| 01***30 | Screw | 11 |
| 01***45 | Bolt | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Air Intake Manifold And Connection(#26080-42161)
| 01***50 | Bolt | 1 |
| 01***30 | Screw | 10 |
| 01***45 | Bolt | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Air Intake Manifold And Connection(#42162-)
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 01***30 | Screw | 9 |
| 01***45 | Bolt | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Cylinder Head
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***32 | Washer, (Without Emergency Steering) | 25 |
| 02***04 | Plug, Pipe | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Cylinder Head (High Altitude Spec.)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***32 | Washer, (Without Emergency Steering) | 25 |
| 02***04 | Plug, Pipe | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Cylinder Head Cover
| 61***10 | Cap, Oil Filler | 1 |
| 61***20 | Screw | 4 |
| 61***30 | Washer,(B) | 4 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Cylinder Head Cover (Hige Altitude Spec.)
| 01***20 | Bolt,(For Japan Pc200) | 1 |
| 04***50 | Screw | 4 |
| 07***80 | Clamp, Drain Hose | 3 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Exhaust Manifold And Muffler(#10001-13854)
| 01***20 | Bolt | 2 |
| 01***25 | Grub Screw | 4 |
| 01***45 | Stud | 4 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Exhaust Manifold And Muffler(#13855-)
| 01***20 | Bolt | 2 |
| 01***25 | Grub Screw | 4 |
| 01***45 | Stud | 2 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Exhaust Manifold And Turbocharger (High Altitude Spec.)
| 01***25 | Grub Screw | 4 |
| 01***45 | Bolt, Bracket Mounting | 12 |
| 01***90 | Bolt,(For Large Fan) | 12 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Muffler (With Catalyzer) (Tunnel Spec.)
| 01***16 | Bolt | 4 |
| 01***23 | Washer,Spring | 4 |
| 62***70 | Muffler,(Tunnel Spec.) | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Muffler And Mounting (High Altitude Spec.)
| 01***20 | Bolt | 2 |
| 01***35 | Stud | 2 |
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 2 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Rocker Arm
| 01***12 | Bolt,(Without R.P.C.U.) | 1 |
| 01***65 | Bolt,(For Alternator Bracket Mount) | 8 |
| 61***30 | Nut | 12 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Cylinder Head : Turbocharger (High Altitude Spec.)
| 62***10 | Turbocharger Ass'Y | 1 |
| GA***16 | Bolt | 6 |
| GA***64 | Housing,Turbine | 1 |
Electrical System
Komatsu : 6d95l-1l(S/N 10001-Up) : Electrical System : Alternator (25a) (With Hardening Pulley) (Except Japan)
| 60***30 | Alternator A. (25a),(With Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Electrical System : Alternator (25a) (With Non Hardening Pulley) (Except Japan)
| 60***20 | Alternator A. (25a),(With Non Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Electrical System : Alternator (35a) (With Hardening Pulley) (Except Japan)
| 60***40 | Alternator A. (35a),(With Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Electrical System : Alternator (35a) (With Non Hardening Pulley)
| 60***10 | Alternator A. (35a),(With Non Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***80 | Collar | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Electrical System : Alternator (50a)(#10001-33703)
| 60***40 | Alternator A. (50a),(With Non Hardening Pulley) | 1 |
| SD***X0 | Coil Assembly | 1 |
| SD***X0 | Washer | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Electrical System : Alternator (50a)(#33704-)
| 60***90 | Alternator A. (50a),(With Non Hardening Pulley) | 1 |
| SD***X0 | Washer | 1 |
| SD***X0 | Fan | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Electrical System : Alternator And Mounting (25a) (Except Japan)
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 3 |
| 01***70 | Bolt,(For 50a Alternator) | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Electrical System : Alternator And Mounting (25a? 35a) (With Hardening Pulley) (Except Japan)
| 01***55 | Bolt | 1 |
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 3 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Electrical System : Alternator And Mounting (35a) (Except Japan)
| 01***55 | Bolt | 1 |
| 01***30 | Bolt,(For Trimming Dozer) | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 3 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Electrical System : Alternator And Mounting (50a)
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 3 |
| 01***70 | Bolt,(For 50a Alternator) | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Electrical System : Heater Signal
| 60***30 | Signal,Engine Pre Heater | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Electrical System : Starting Motor (5.5kw)(#10001-25975)
| 60***30 | Starting Motor Ass'Y,(5.5kw) (See Fig.0661) | 1 |
| KD***30 | Bracket,Center | 1 |
| KD***10 | Field Coil Ass'Y | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Electrical System : Starting Motor (5.5kw)(#25976-)
| 60***60 | Starting Motor Ass'Y,(5.5kw) | 1 |
| KD***30 | Bracket,Center | 1 |
| KD***10 | Field Coil Ass'Y | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Electrical System : Starting Motor And Mounting (5.5kw)
| 01***35 | Screw | 3 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
| 60***30 | Starting Motor Ass'Y,(5.5kw) (See Fig.0661) | 1 |
Engine Kit
Komatsu : 6d95l-1l(S/N 10001-Up) : Engine Kit : Gasket Kit
| 01***12 | Washer,Lock? Injection Gear | 1 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
| 07***35 | O-Ring,Hydraulic Oil Filter | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Engine Kit : Gasket Kit (High Altitude Spec.)
| 01***12 | Washer,Lock? Injection Gear | 1 |
| 07***00 | O-Ring,(F4350-65a1 -5 ) | 1 |
| 07***35 | O-Ring,Hydraulic Oil Filter | 1 |
Fuel System
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Additional Fuel Filter
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 60***00 | Fuel Filter Ass'Y | 1 |
| 60***20 | Cartridge | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Engine Stop Motor And Mounting(#22592-)
| 01***25 | Screw | 3 |
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 6 |
| 01***20 | Bolt,(For Japan Pc200) | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Filter And Piping
| 01***65 | Bolt,(With Water Separator) | 2 |
| 07***12 | Gasket,Mechanical Pump Piping | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 4 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Feed Pump)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***20 | Pump,Priming | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Feed Pump) (High Altitude Spec.)
| 62***41 | Injection Pump Ass'Y,(High Altitude Spec.) | 1 |
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Feed Pump) (Power Up Spec.)(#46799-)
| 62***34 | Injection Pump Ass'Y,(Power Up Spec.)(See Fig.0453) | 1 |
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2) (High Altitude Spec.)(#10001-86743)
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2) (High Altitude Spec.)(#86744-)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
| DK***20 | Governor Ass'Y | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2) (Power Up Spec.)(#46799-86781)
| 62***34 | Injection Pump Ass'Y,(Power Up Spec.)(See Fig.0453) | 1 |
| DK***00 | Adapter | 1 |
| DK***00 | Nut,Lock | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2) (Power Up Spec.)(#86782-)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
| DK***90 | Governor Ass'Y | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#10001-14286)
| DK***00 | Adapter | 1 |
| DK***00 | Nut,Lock | 1 |
| DK***00 | Housing | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#14287-22591)
| DK***00 | Adapter | 1 |
| DK***00 | Nut,Lock | 1 |
| DK***00 | Housing | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#22592-25582)
| DK***00 | Adapter | 1 |
| DK***00 | Nut,Lock | 1 |
| DK***00 | Housing | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (1/2)(#25583-)
| DK***00 | Adapter | 1 |
| DK***00 | Nut,Lock | 1 |
| DK***00 | Housing | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2) (High Altitude Spec.)(#10001-86743)
| 62***41 | Injection Pump Ass'Y,(High Altitude Spec.) | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2) (High Altitude Spec.)(#86744-)
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
| DK***00 | Bushing | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2) (Power Up Spec.)(#46799-86781)
| 62***34 | Injection Pump Ass'Y,(Power Up Spec.)(See Fig.0453) | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2) (Power Up Spec.)(#86782-)
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
| DK***00 | Bushing | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#10001-14286)
| DK***00 | Spring | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#14287-22591)
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
| DK***00 | Bushing | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#22592-25582)
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
| DK***00 | Bushing | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Governor) (2/2)(#25583-)
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
| DK***00 | Bushing | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2) (High Altitude Spec.)(#10001-86743)
| 62***40 | Injection Pump Ass'Y | 1 |
| 62***41 | Injection Pump Ass'Y,(High Altitude Spec.) | 1 |
| 62***42 | Injection Pump Ass'Y | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2) (High Altitude Spec.)(#86744-)
| 62***42 | Injection Pump Ass'Y | 1 |
| DK***30 | Key,Woodruff | 1 |
| DK***30 | Bearing | 0 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2) (Power Up Spec.)(#46799-86781)
| 62***34 | Injection Pump Ass'Y,(Power Up Spec.)(See Fig.0453) | 1 |
| 62***35 | Injection Pump Ass'Y | 1 |
| DK***30 | Key,Woodruff | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2) (Power Up Spec.)(#86782-)
| 62***35 | Injection Pump Ass'Y | 1 |
| DK***30 | Key,Woodruff | 1 |
| DK***30 | Bearing | 0 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2)(#10001-22591)
| 62***30 | Injection Pump Ass'Y | 1 |
| 62***31 | Injection Pump Ass'Y | 1 |
| DK***30 | Key,Woodruff | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Pump) (1/2)(#22592-)
| 62***32 | Injection Pump Ass'Y | 1 |
| 62***33 | Injection Pump Ass'Y | 1 |
| DK***30 | Key,Woodruff | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2) (High Altitude Spec.)(#10001-86743)
| 62***41 | Injection Pump Ass'Y,(High Altitude Spec.) | 1 |
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2) (High Altitude Spec.)(#86744-)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***00 | Sleeve,Control | 6 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2) (Power Up Spec.)(#46799-86781)
| 62***34 | Injection Pump Ass'Y,(Power Up Spec.)(See Fig.0453) | 1 |
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2) (Power Up Spec.)(#86782-)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***00 | Sleeve,Control | 6 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2)(#10001-22591)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***00 | Sleeve,Control | 6 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump (Pump) (2/2)(#22592-)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***00 | Sleeve,Control | 6 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Injection Pump And Piping
| 01***35 | Stud | 4 |
| 01***35 | Grub Screw | 4 |
| 01***25 | Screw | 4 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Fuel Nozzle And Spill Pipe
| 01***35 | Bolt, Mount Bracket To Floor | 6 |
| 07***10 | Tube,(See Fig.0421-14) | 5 |
| 07***10 | Tube,Spill | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Fuel System : Solenoid And Mounting(#10001-22591)
| 01***20 | Bolt,(With Tachometer Outlet) | 4 |
| 01***40 | Bolt | 4 |
| 01***03 | Nut? L.H. Thread,L.H. Thread | 1 |
Lubricating Oil System
Komatsu : 6d95l-1l(S/N 10001-Up) : Lubricating Oil System : Lubricating Oil Filter
| 60***40 | Cartridge,Engine Oil Filter (D31s) | 1 |
| 60***41 | Cartridge,Engine Oil Filter (D31s) | 1 |
| 60***20 | Plate? Caution,(Italian-English) | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Lubricating Oil System : Lubricating Oil Pump And Suction Pipe
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Screw | 6 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
Komatsu : 6d95l-1l(S/N 10001-Up) : Lubricating Oil System : Turbocharger Lubricating Oil Piping (High Altitude Spec.)
| 01***16 | Screw | 1 |
| 01***20 | Screw | 4 |
| 01***06 | Nut | 1 |
Frequently asked questions
What is the engine type and configuration?
The Komatsu 6D95L-1L is a 4-cycle, water-cooled, direct injection diesel engine with an in-line 6-cylinder configuration. It has a bore and stroke of 95 mm x 115 mm and a total displacement of 4,890 cm³. It uses a mechanical Bosch fuel injection pump (PE5 or VE type) and a centrifugal all-speed governor.
What is the operating weight range of the machines using this engine?
The operating weight varies significantly by machine model. For example, the SD23/25-3 compact excavator weighs approximately 2,300-2,500 kg (5,070-5,512 lb), while the FD35/40/45-4 forklifts have much lower weights. The engine itself weighs approximately 360-370 kg (794-816 lb) dry.
What engine replaced the 6D95L-1L?
The 6D95L-1L was succeeded by the SAA6D95LE series engines in later Komatsu models to meet Tier 3 and Tier 4 emissions standards. The SAA6D95LE series features electronic control and aftertreatment systems, whereas the 6D95L-1L is a mechanically governed Tier 1/Tier 2 engine.
What 6D95L-1L(S/N 10001-UP) owners discuss
What are the typical power and torque specifications for the 6D95L-1 engine series?
The 6D95L-1 engine series produces flywheel horsepower ranging from 90 HP at 2,250 RPM to 95 HP at 2,250 RPM, depending on the specific configuration. Maximum torque is rated at 30 kgm at 1,500 RPM for the base configuration and 32 kgm at 1,500 RPM for the FD50/S0170-6 variant. Minimum fuel consumption ratio is 160 g/hp·h across the series. The S6D95L-1 variant produces 110 HP at 2,000 RPM with 41.5 kgm of torque at 1,500 RPM. Variations in power output depend on the specific machine application and emissions tier configuration. have your dealer verify the exact rating for your serial number.
How does the boost compensator function on the 6D95L-1 engine, and what maintenance is required?
The boost compensator is actuated by turbocharger air supply pressure to increase fuel injection during high-speed, high-load conditions. This mechanism compensates for turbocharger inertia, ensuring fuel delivery matches air intake to improve exhaust color and allow the turbocharger to display full performance. The actuation pressure and amount are determined by the tension of the boost compensator spring and can be adjusted via an adjustment screw. Improper setting can lead to poor exhaust color during acceleration or reduced low-speed performance.
What are the common hydraulic and engine interaction issues reported for Komatsu machines using this engine series?
Owners and operators note that Komatsu excavators rely heavily on electronic control systems, where a single faulty sensor or unstable power supply can trigger multiple warning signals, intermittent starting, or random shutdowns. A common diagnostic pattern is distinguishing between engine power loss and hydraulic load; if engine RPM drops heavily when hydraulics are used, the hydraulic system may be placing excessive load on the engine. Additionally, if all hydraulic functions become slow simultaneously, the issue often lies in shared hydraulic supply, pump control, or engine performance rather than individual cylinders.
What undercarriage and wear patterns are typical for machines powered by the 6D95L-1 series?
Machines equipped with the 6D95L-1 series, such as the WA120-1 wheel loader, are subject to undercarriage wear patterns common to heavy earthmoving equipment. Track tension should be monitored regularly; tracks that repeatedly loosen indicate issues with the adjuster or component wear. Pulling to one side during travel may stem from mechanical resistance, track-chain condition, or hydraulic final-drive issues rather than just motor failure. Testing the symptom in both forward and reverse directions helps isolate hydraulic versus mechanical causes.
What are the common electrical and sensor issues associated with the 6D95L-1 engine platform?
The 6D95L-1 engine platform is integrated with Komatsu’s electronic control systems. Common electrical issues include intermittent starting, dashboard failures, and random machine shutdowns caused by faulty sensors or unstable power supplies. Multiple fault codes often point to battery condition, ground connections, or connector integrity. Engine performance issues such as loss of power, increased fuel usage, or overheating may signal airflow restriction, injector wear, or failing fuel delivery components rather than purely electrical faults.
What cooling system maintenance is critical for the 6D95L-1 engine?
The cooling system must be maintained to prevent overheating during heavy excavation. Inspect the radiator, hydraulic oil cooler, charge-air cooler, and air-conditioning condenser for packed material between heat exchangers. Coolant level should be checked when cold. If temperature rises during heavy work but falls during idle, cooling capacity may be marginal. If coolant is repeatedly expelled or the system becomes highly pressurized shortly after a cold start, deeper engine diagnosis may be required.
What should be checked when buying a used machine with a 6D95L-1L engine (S/N 10001-UP)?
When purchasing a used machine with a 6D95L-1L engine (S/N 10001-UP), verify the exact serial number range to ensure compatibility with the correct service manual and parts. Check for signs of low-oil operation, such as spun rod bearings (#3 and #4), which may require engine replacement. Inspect the hydraulic system for weakness when hot, indicating internal leakage in pumps or motors. Verify the boost compensator adjustment and check for air leaks in intake and charge-air hoses. Confirm the condition of the undercarriage and track tension.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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