Komatsuengine(no series)

Komatsu 6D95L-1L-WR(S/N 10001-UP)

Maintenance schedule, common problems & OEM parts breakdown

Search live 6D95L-1L-WR(S/N 10001-UP) parts

The Komatsu 6D95L-1L-WR (S/N 10001-UP) is a 5.0-liter, inline-6, turbocharged diesel engine designed for medium-duty construction applications. It powers the Komatsu WA120-1 wheel loader and related 95-series equipment. The engine delivers approximately 81 kW (109 hp) at 2,000 RPM with a torque output of 400–450 N·m. Production years for this specific serial range span the late 1980s through the early 1990s. It serves as a direct evolution of the earlier 6D95 series, offering improved fuel efficiency and durability for earthmoving and material handling tasks.

Across the 95-series generations, the 6D95L-1L-WR represents a transitional phase between mechanical injection systems and the electronically controlled S6D95L and SA6D95LE engines found in later models. The 'WR' suffix denotes specific regional or environmental configurations. In the used and parts market, this engine remains highly relevant due to its widespread installation in the durable WA120-1 loader. Its simple mechanical architecture and robust cast-iron block make it a cost-effective powerplant for fleet expansion and aftermarket rebuilds, ensuring continued availability of core components like cylinder heads and pistons.

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-WR(S/N 10001-UP) specifications

Engine

Model	6D95L-1L-WR
Series	95 Series
Configuration	6 cylinder in-line, turbocharged
Displacement	4.890 liter
Bore	95 mm
Stroke	115 mm
Power	52 kW, 70 hp @ 2350 rpm to 59 kW, 80 hp @ 2500 rpm
Torque	265-270 Nm @ 1400 rpm
Emissions Tier	Not documented for this exact serial range — verify with your dealer

Weights

Engine Weight

420-430 kg

Dimensions

Engine Length	1056-1075 mm
Engine Width	620-625 mm
Engine Height	1093-1100 mm

Performance

Travel Speeds	Not documented for this exact serial range — verify with your dealer
Gradeability	Not documented for this exact serial range — verify with your dealer

Service capacities (summary)

Fuel Tank	Not documented for this exact serial range — verify with your dealer
Hydraulic System	Not documented for this exact serial range — verify with your dealer
Engine Oil	Not documented for this exact serial range — verify with your dealer
Cooling System	Not documented for this exact serial range — verify with your dealer

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

Komatsu 6D95L-1L-WR(S/N 10001-UP) maintenance schedule

Service interval	Tasks
Every 10 h	Check engine oil level. Check hydraulic fluid level. Check coolant level. Drain water from fuel separator.
Every 250 h	Change engine oil and filter. Grease all points. Check air filter restriction indicator. Inspect belts and hoses.
Every 500 h	Replace fuel filter. Replace hydraulic return filter. Test coolant SCA. Take KOWA oil sample.
Every 1,000 h	Replace air filter outer element. Check valve clearance. Inspect turbocharger. Measure undercarriage wear.
Every 2,000 h	Change hydraulic oil. Flush and replace coolant. Change final drive oil. Inspect structural welds.

Servicing the 6D95L-1L-WR(S/N 10001-UP) beyond the schedule

Predictive Maintenance & Fluid Analysis

Utilize KOWA fluid analysis at every 500-hour interval to monitor wear metals and contamination. Track iron, copper, and lead levels in the engine oil to detect internal bearing wear early. Analyze hydraulic fluid for particle count and viscosity changes to protect pump integrity. Monitor coolant pH and SCA concentration to prevent liner cavitation. KOMTRAX telematics should be configured to alert on load frequency and fault codes, providing data-driven insights into engine stress and operational efficiency before failures occur.

Corrective & Common Repairs

Address intermittent starting and random shutdowns by inspecting the fuel delivery system and electrical connections. Replace worn injectors if power loss or excessive fuel consumption is observed. Check the front camshaft support, as tapered roller bearings are critical for proper alignment. Inspect the cylinder head gasket for leaks if overheating occurs. Verify the integrity of the air intake manifold and exhaust muffler connections to maintain optimal airflow and reduce backpressure on the turbocharger.

Overhaul & Rebuild Points

Plan for an inframe overhaul when compression drops or oil consumption exceeds limits. Replace piston rings, liners, and bearings using a dedicated 6D95L overhaul kit. Inspect the crankshaft for wear and replace main bearings if clearance exceeds specifications. Recondition the cylinder head, checking valve seats and guides for wear. Ensure proper torque values for cylinder head bolts and crankshaft mains during reassembly to prevent catastrophic failure and ensure long-term reliability.

Seasonal & Environment Servicing

Adjust maintenance intervals for dusty or sandy environments by cleaning the air filter more frequently and checking the outer element daily. In cold climates, verify coolant freeze protection and use appropriate viscosity engine oil for startup. Drain the fuel water separator more often in humid conditions to prevent microbial growth. For long-term storage, fog the cylinders with oil and seal the intake and exhaust to prevent corrosion. Ensure the radiator and oil cooler fins are clear of debris to maintain optimal heat dissipation.

6D95L-1L-WR(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 →
600-311-1190	Plate? Caution,Fuel Filter	Fuel system service	Check fitment →
600-311-6220	Cartridge,Fuel Filter	Fuel system service	Check fitment →
600-311-9600	Fuel Filter Ass'Y	Fuel system service	Check fitment →

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

6D95L-1L-WR(S/N 10001-UP) fault codes & troubleshooting

Code	Meaning	Likely cause	What to do
CA111	Engine Controller Critical Internal Failure	ECM hardware malfunction or corrupted internal memory.	Inspect ECM power and ground connections; replace or reprogram the Engine Control Module if the fault persists.
CA115	Engine Speed and Backup Speed Sensor Error	Faulty crankshaft speed sensor, damaged wiring harness, or poor connector contact.	Verify sensor voltage at the pin connector; replace the speed sensor if the signal is absent or erratic.
CA122	Charge Air Pressure Sensor High Error	Sensor feedback voltage too high, indicating a potential short to power or sensor failure.	Check the intake air pressure sensor wiring for shorts; test sensor resistance and replace if out of spec.
CA123	Charge Air Pressure Sensor Low Error	Sensor feedback voltage too low, indicating an open circuit or sensor failure.	Inspect the sensor harness for disconnection or chafing; replace the sensor if the circuit is intact.
CA131	Throttle Sensor High Error	Throttle plate position sensor feedback voltage is too high.	Check the throttle motor sensor supply voltage and signal line; replace the throttle body assembly if faulty.
CA132	Throttle Sensor Low Error	Throttle plate position sensor feedback voltage is too low.	Inspect the throttle sensor connector for corrosion; verify the 5V sensor supply and replace the sensor if necessary.
CA441	Battery Voltage Low Error	Charging system failure, weak battery, or high resistance in the charging circuit.	Test the alternator output and battery health; tighten loose connections and replace the battery or alternator as needed.
CA451	Rail Pressure Sensor High Error	Common rail pressure sensor feedback value is too high, indicating overpressure or sensor fault.	Diagnose the fuel rail pressure sensor circuit; check for actual overpressure conditions or replace the sensor.
CA689	Engine Speed Sensor Error	Primary engine speed sensor failure or signal loss.	Replace the engine speed sensor and verify the gap and wiring integrity.
AA10NX	Air Cleaner Clogging	Intake air filter element is blocked with debris or dirt.	Replace the air filter element immediately to prevent engine damage.

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

6D95L-1L-WR(S/N 10001-UP) attachments & work tools

Excavator Attachments

The 6D95L-1L-WR engine is documented for use in the PC200-5, PC200-6L, PC200LC-5, PC200LC-6L, PC210LC-6L, PC220LC-5, PC220LC-6L, and PC250LC-6L excavator series. These machines utilize standard quick coupler systems for bucket interchange. Hydraulic flow requirements for auxiliary circuits vary by configuration and series.

Motor Grader Attachments

The engine powers the GD511A-1 motor grader. This model is equipped with a moldboard and ripper assembly. The mounting system for the moldboard is integrated into the frame structure. Ripper shank configurations vary by configuration and series.

Wheel Loader Attachments

The WA120-1 wheel loader is listed with the 6D95L-1L engine for serial numbers 10001-Up. The WA120-1LC variant is also associated with this engine family. These loaders use a standard Z-bar or parallel-link linkage system for bucket attachment. Bucket capacities vary by configuration and series.

Dozer Attachments

The source text references the D31A, P, S, Q-18 and D31E, P, PL, PLL, S, Q, AM, SM-20(A) dozer series in relation to the 6D95L-1 engine family. These models utilize a fixed or adjustable moldboard and a ripper. Blade mounting systems are specific to the dozer frame. Ripper options vary by configuration and series.

Hydraulic and Engine Options

Komatsu recommends Komatsu EO, TO, and AXO fluids for engine and hydraulic systems. The cooling system requires Super-coolant AF-NAC. Fluid capacities and specific hydraulic kit arrangements are not documented for this exact serial range — verify with your dealer.

All 6D95L-1L-WR(S/N 10001-UP) assemblies by section

Every catalogued assembly group for the Komatsu 6D95L-1L-WR(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-Wr(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
01***85	Bolt	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
01***55	Bolt,(With Engine Stop Motor Type)	3

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
01***55	Bolt,(With Engine Stop Motor Type)	3

See all parts with full part numbers in Heavy Parts AI →

Cylinder Block

Komatsu : 6d95l-1l-Wr(S/N 10001-Up) : Cylinder Block : Camshaft And Tappet

01***20	Screw	2
04***16	Fitting Wedge	1
62***10	Tappet	12
62***10	Tappet Rod	12

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
61***20	Collar,Taper	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
61***20	Collar,Taper	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(S/N 10001-Up) : Cylinder Block : Cylinder Block

01***12	Bolt	2
01***16	Screw	4
01***20	Bolt,(For Japan Pc200)	2
04***20	Pin,Dowel (Welded)	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
01***05	Screw	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
01***16	Screw	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
01***30	Bolt,(Water Separator Spec.)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
62***01	Piston Ring Ass'Y,Per Cylinder	6

See all parts with full part numbers in Heavy Parts AI →

Cylinder Head

Komatsu : 6d95l-1l-Wr(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
01***06	Nut	6

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
01***60	Bolt	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
07***08	Plug, Expansion	6

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(S/N 10001-Up) : Cylinder Head : Cylinder Head Cover

61***10	Cap, Oil Filler	1
61***20	Screw	4
61***30	Washer,(B)	4
61***42	Packing,Cylinder Head Cover	4

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(S/N 10001-Up) : Cylinder Head : Exhaust Manifold And Muffler(#13855-)

01***20	Bolt	2
01***25	Grub Screw	4
01***45	Stud	2
01***30	Bolt - Lower Oil Cooler Outlet Tubemounting	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
61***20	Spring,Conical	2

See all parts with full part numbers in Heavy Parts AI →

Electrical System

Komatsu : 6d95l-1l-Wr(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
KD***30	Retainer	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
KD***30	Retainer	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
KD***70	Rear Bracket Ass'Y,Rear	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
KD***70	Rear Bracket Ass'Y,Rear	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
SD***10	Nut	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
01***95	Bolt	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
01***70	Bolt,(For 50a Alternator)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
01***70	Bolt,(For 50a Alternator)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
01***95	Bolt	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(S/N 10001-Up) : Electrical System : Heater Signal

60***30

Signal,Engine Pre Heater

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
KD***10	Magnetic Switch A	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
(6***0)	Starting Motor Ass'Y,(See Fig.0661a) (5.5kw)	1

See all parts with full part numbers in Heavy Parts AI →

Engine Kit

Komatsu : 6d95l-1l-Wr(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
07***40	O-Ring,Water Pump Mount	2

See all parts with full part numbers in Heavy Parts AI →

Fuel System

Komatsu : 6d95l-1l-Wr(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
61***31	Plug,(Not Shown)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
01***50	Bolt,(For Shipping)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
07***14	Bolt,Joint	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
DK***10	Feed Pump Ass'Y,(Not Shown)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
DK***00	Housing	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
DK***20	Limiter	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
DK***00	Bushing	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
DK***40	Bolt	2

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
DK***30	Bearing	0

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
DK***20	Shim, 1.40mm; Was Dk029311-7220, Shim? 1.4mm	0

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
DK***00	Sleeve,Control	6

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
DK***20	Plunger Ass'Y	6

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(S/N 10001-Up) : Fuel System : Fuel Injection Pump And Piping

01***35	Stud	4
01***35	Grub Screw	4
01***25	Screw	4
01***12	Bolt,(See Fig.0501)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
62***10	Carrier	6

See all parts with full part numbers in Heavy Parts AI →

Lubricating Oil System

Komatsu : 6d95l-1l-Wr(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
60***60	Plate? Caution,(Arabic-English)	1

See all parts with full part numbers in Heavy Parts AI →

Komatsu : 6d95l-1l-Wr(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
62***10	Valve	1

See all parts with full part numbers in Heavy Parts AI →

6D95L-1L-WR(S/N 10001-UP) serial number reference

The PIN plate is typically riveted to the right-hand side of the cab on the lower frame, just behind the front idler or beneath the operator's window. For wheel loaders, it is located on the front frame on the right-hand side of the articulation joint. The prefix is the first two letters of the 17-character ISO PIN found on this plate.

Prefix	Identifies	Notes
WA	Wheel Loader	Identifies the WA100-1, WA100SS-1, WA100SSS-1, and WA150-1 wheel loader models. The 6D95L-1L-WR engine is fitted to these machines with serial numbers starting from 10001. The WR11-1 and WR11SS-1 variants use the same engine but have a separate serial break starting at 29005.

Frequently asked questions

What is the engine type for the Komatsu 6D95L-1L-WR?

It is a 5.0-liter, inline-6, water-cooled, direct injection diesel engine with turbocharging, producing approximately 81 kW (109 hp).

What is the operating weight of the machine powered by this engine?

Operating weight varies by configuration and series, typically ranging from 9,182 to 87,083 lb depending on the specific WA120-1 loader setup and attachments.

What engine replaced the 6D95L-1L-WR?

It was succeeded by the electronically controlled S6D95L and SA6D95LE engines in later Komatsu 95-series and subsequent models to meet stricter emissions standards.

What 6D95L-1L-WR(S/N 10001-UP) owners discuss

What are the known powertrain and hydraulic behaviors for the Komatsu 6D95L-1L-WR(S/N 10001-UP) engine?

The engine is a 4-cycle, water-cooled, direct injection diesel unit with a 5.0 L (5.0 L) displacement. It delivers approximately 81 kW (109 HP) at 2,000 RPM with an estimated torque of 400–450 N·m (295–332 lb·ft). The engine is an in-line 6-cylinder turbocharged configuration. Hydraulic systems in machines using this engine series are sensitive to oil temperature; weakness when hot often indicates internal leakage in pumps, control valves, or motors rather than pump failure alone. Cold oil viscosity masks these leaks. Shared hydraulic weakness across all functions points to engine speed issues, charge pressure, or main pump control rather than individual cylinder failure. Engine power loss under load is frequently caused by airflow restriction (clogged charge-air hoses, turbo issues) or fuel delivery problems, not necessarily internal engine wear. Always verify if the engine is dragging the hydraulics down or if the hydraulics are failing independently by monitoring engine RPM under load.

What undercarriage or wear patterns are typical for machines powered by this engine series?

Machines equipped with the 6D95L-1L-WR(S/N 10001-UP) engine, such as the WA120-1 wheel loader, are subject to standard heavy-duty undercarriage wear. Track tension must be monitored regularly; tracks that repeatedly loosen indicate issues with the tensioner or excessive wear in the track chain and rollers. Pulling to one side during travel is often caused by uneven track tension, debris packed into the undercarriage, or roller condition rather than immediate travel motor failure. Final drive noise is commonly linked to low oil levels or contamination. Mechanical resistance in the undercarriage should be checked before diagnosing hydraulic travel circuits. Test symptoms in both forward and reverse to isolate hydraulic issues from mechanical binding.

What are the specific quirks of the 6D95L-1L-WR(S/N 10001-UP) engine series?

The 6D95L-1L-WR(S/N 10001-UP) is part of the 95 Series engine family. A specific mechanical quirk involves the front camshaft support: the front of the cam does not ride on the front cam bushing but is supported by tapered roller bearings in a housing behind the cam gear. When servicing the front cover or camshaft, ensure the correct bushing is installed; an incorrect part can leave a 1/8 inch (203.2 mm) gap. The engine block and front cover are sealed with silicone, not gaskets, for the oil pan and front cover interfaces. Over- or under-torquing cylinder head bolts, crankshaft mains, connecting rods, rocker arms, and flywheel during reassembly is a common cause of failure. Proper torque values from the OEM guide are critical to prevent catastrophic failure.

What are common electrical and sensor issues associated with this engine?

Komatsu excavators and equipment using this engine series rely heavily on electronic control systems. A single faulty sensor or unstable power supply can trigger multiple warning signals. Owners often report intermittent starting, dashboard failures, or machines that randomly shut down. These symptoms are frequently linked to battery state of charge, loose battery terminals, poor engine/chassis grounds, or main starter cable issues. If the display dims heavily or voltage collapses during starting, perform a load and voltage-drop test before replacing the starter. Multiple fault codes often point to battery, ground, or connector issues rather than component failure. Intermittent starting may also be caused by air entering the fuel supply or recent filter replacement work that was not properly bled.

What should be checked when buying a used machine with the 6D95L-1L-WR(S/N 10001-UP) engine?

Verify the exact serial number prefix to confirm the engine model (6D95L-1L) and ensure compatibility with the machine model (e.g., WA120-1). Check the cooling package (radiator, hydraulic oil cooler, charge-air cooler) for packed debris between heat exchangers, which causes overheating during heavy work. Inspect the engine for signs of low oil operation, such as spun rod bearings (commonly #3 and #4 on this series) or main bearing failure. Test hydraulic performance cold and hot to identify internal leakage that worsens with temperature. Check for intermittent electrical faults, dashboard failures, or random shutdowns. Verify track tension and undercarriage wear. Ensure the engine starts reliably and holds RPM under load without excessive smoke or power loss. Confirm the fuel system has been bled properly if filters were recently replaced.

What fluids are recommended for the Komatsu 6D95L-1L-WR(S/N 10001-UP) engine and associated systems?

Use Komatsu Genuine Diesel Engine Oil (EO/TO series) for the engine lubrication system. Use Komatsu Genuine Hydraulic Oil (HYDO series) for the hydraulic system. Use Komatsu Genuine Super Coolant AF-NAC for the cooling system. Use Komatsu Genuine Axle Oil (AXO series) for axle systems if applicable. Use Komatsu Genuine Powertrain Oil (HO series) for final drives and transmissions. Fluid specifications vary by configuration and series; always consult the specific machine's operation and maintenance manual for the exact grade and capacity.

What safety-critical fixes or inspections are required for the 6D95L-1L-WR(S/N 10001-UP) engine?

Ensure the front camshaft bushing is the correct type; the front cam is supported by tapered roller bearings, not the bushing, and an incorrect bushing can cause improper alignment. Verify all critical torque values for cylinder head bolts, crankshaft mains, connecting rods, rocker arms, and flywheel during reassembly to prevent catastrophic failure. Check engine and chassis grounds, main starter cable, and battery terminals for secure connections to prevent intermittent starting or random shutdowns. Inspect the cooling system for proper coolant level and fan operation to prevent overheating. Have your dealer verify the exact serial number range and associated service bulletins for any known updates to the fuel system or electronic controls.

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

Need a specific 6D95L-1L-WR(S/N 10001-UP) part?

Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.

Search parts in the app