Komatsu 6D95L-1AD(S/N 96999-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu 6D95L-1AD engine (S/N 96999-UP) is a 6-cylinder, in-line, water-cooled, direct-injection diesel powerplant used in mid-size Komatsu construction equipment, primarily the GD305-A-1A grader and select excavator/dozer platforms from the 1990s and early 2000s. It delivers approximately 82 to 90 flywheel horsepower at 2,150 to 2,250 rpm with a maximum torque of 28 kgm (203 ft·lbf) at 1,500 rpm. The engine displaces 4,890 cm³ with a bore and stroke of 95 mm x 115 mm. It weighs approximately 360 kg (794 lb) dry and utilizes a Bosch VE distributor-type fuel injection pump with a mechanical all-speed governor. This engine replaced earlier 6D95 variants in the Komatsu 95 series lineup and was succeeded by electronically controlled Tier-compliant engines in later model generations.
Across its production life, the 6D95L-1AD evolved from mechanical injection to meet evolving emissions standards, with later variants introducing turbocharging and upgraded cooling capacities. The S/N 96999-UP designation identifies a specific production block often associated with the GD305-A-1A grader application. In the used and parts market, this engine remains highly relevant due to its simple mechanical architecture, which allows for straightforward field repairs and rebuilds. Its widespread use in graders and older excavators ensures a robust aftermarket supply of components, making it a cost-effective power unit for fleet maintenance and long-term equipment preservation.
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-1AD(S/N 96999-UP) specifications
Engine
| Model | 6D95L-1 (per factory spec sheet for this serial range) |
| 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 (varies by configuration/series) |
| Displacement | 4.890 L (298 cu in) |
| Cylinders | 6 in-line |
| Bore x Stroke | 95 mm x 115 mm (3.74 in x 4.53 in) |
| Emissions Tier | Tier 1 / Stage II (per rebuilt engine listing) |
Weights
| Dry Weight | 345–430 kg (761–948 lb) (varies by configuration/series) |
Dimensions
| Overall Length | 983–1,075 mm (38.7–42.3 in) (varies by configuration/series) |
| Overall Width | 586–637 mm (23.1–25.1 in) (varies by configuration/series) |
| Overall Height | 809–1,100 mm (31.9–43.3 in) (varies by configuration/series) |
Performance
| Maximum Torque | 28–41.5 kgm (203–300 ft·lb) @ 1,500 rpm (varies by configuration/series) |
| High Idling Speed | 2,200–2,500 rpm (varies by configuration/series) |
| Low Idling Speed | 700 rpm |
| Minimum Fuel Consumption | 160 g/HPh |
Service capacities (summary)
| Lubricating Oil Capacity | 11–13 L (2.9–3.4 gal) (varies by configuration/series) |
| Coolant Capacity | 7.5–18 L (2.0–4.8 gal) (varies by configuration/series) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Komatsu 6D95L-1AD(S/N 96999-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-1AD(S/N 96999-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu KOWA fluid analysis at every 500-hour interval to monitor engine wear metals (iron, copper, lead) and coolant contaminants. Check coolant SCA concentration at 500 hours to prevent liner cavitation. Monitor hydraulic oil particle count and viscosity during 1,000-hour services. Track fuel dilution and soot levels in engine oil samples to adjust oil change intervals if operating in high-dust or heavy-load conditions. Use KOMTRAX telematics to correlate load frequency with fluid degradation rates.
Corrective & Common Repairs
Address hard-starting issues by inspecting the Bosch VE distributor pump and governor linkage for wear. Replace the fuel filter and drain the water separator if water contamination is suspected. Check the air filter restriction indicator and replace the outer element at 1,000 hours or when clogged. Inspect the turbocharger shaft play and seal condition during 1,000-hour services. Verify battery terminal integrity and alternator output (24V, 15A or 25A) during 500-hour checks. Replace worn piston rings or cylinder liners if compression loss exceeds specifications.
Overhaul & Rebuild Points
Plan a major overhaul when valve clearance adjustments become frequent or when compression drops below acceptable limits. Inspect the cylinder block and head gasket surfaces for leaks during coolant flushes at 2,000 hours. Measure crankshaft main bearing clearance and connecting rod end play during disassembly. Replace the timing gear set if wear is detected in the camshaft or crankshaft gears. Rebuild the fuel injection pump if fuel delivery pressure is inconsistent. Replace the water pump and thermostat if cooling efficiency declines.
Seasonal & Environment Servicing
In cold climates, verify coolant freeze protection and use appropriate viscosity engine oil (Komatsu EO or equivalent) to ensure cold starts. Drain water from the fuel separator daily in humid or wet conditions to prevent microbial growth. In dusty environments, clean the radiator and oil cooler fins daily and inspect the air filter more frequently than the standard 1,000-hour interval. Check track tension and undercarriage wear more often on abrasive surfaces. Ensure the battery is insulated or heated in extreme cold to maintain cranking power.
6D95L-1AD(S/N 96999-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 600-311-7440 | Cartridge,Fuel Filter | Fuel system service | Check fitment → |
| 6206-73-6200 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| 600-311-6220 | Cartridge,Fuel Filter | Fuel system service | Check fitment → |
| 09637-30262 | Plate? Instruction,Air Cleaner (Double Element) | Air intake service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
6D95L-1AD(S/N 96999-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 |
| CA111 | Internal engine controller fault | ECM internal abnormality | Replace or reprogram the ECM |
| 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 |
| CA441 | Battery voltage too low | Alternator or battery failure; voltage regulator issue | Replace the alternator or battery; check the voltage regulator |
| CA442 | Battery voltage too high | Alternator or battery failure; voltage regulator issue | Replace the alternator or battery; check the voltage regulator |
| CA122 | Intake air pressure high voltage | Intake pressure sensor malfunction or wiring issue | Verify the intake pressure sensor and wiring |
| CA123 | Intake air pressure low voltage | Sensor short or airflow restriction | Check for a sensor short or an airflow restriction |
| CA234 | Engine overspeed | Throttle calibration error, engine load cycle issue, or operator misuse | Verify throttle calibration, engine load cycle, or operator misuse |
| CA2311 | IMV solenoid valve failure | IMV solenoid malfunction or wire harness issue | Replace the IMV solenoid or inspect the wire harness |
| AA10NX | Air cleaner clogging | Clogged air filter element | Replace the air filter |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
6D95L-1AD(S/N 96999-UP) attachments & work tools
Bulldozer Blade Configurations
The 6D95L-1 engine powers the D31P-18 series dozers, which utilize a semi-universal (SU) or straight (S) blade configuration. Factory guarding options include heavy-duty side cutters and corner protectors for abrasive terrain. Blade capacity varies by configuration, typically ranging from 2.5 to 3.5 cubic yards for this class.
Excavator Work Tools
Compatible with the PC120-3 and PC200-6 series excavators, supporting standard digging buckets, trenching buckets, and rock buckets. Coupler systems include fixed pin or hydraulic quick-attach mounts depending on the specific chassis generation. Bucket capacities vary by configuration/series, generally ranging from 0.5 to 1.2 cubic meters for this engine class.
Grader Blade & Ripper Options
The GD305-A-1A grader utilizes the 6D95L-1HH variant (serial 96999-Up) and supports moldboard blades with adjustable angle and tilt. Ripper options include single or multi-shank rear-mounted rippers for soil preparation. Blade width and ripper depth are determined by the specific grader model configuration.
Hydraulic Kit Requirements
Work tools requiring auxiliary hydraulics (e.g., tilt rotators, hydraulic breakers) must match the machine's factory hydraulic circuit arrangement. Kits typically include high-pressure hoses, control valves, and mounting brackets specific to the boom or arm configuration. Availability varies by configuration/series as older models may require retrofitting.
Engine Mounting & Coupling
The 6D95L-1 engine mounts via a standard flywheel housing and bellhousing interface compatible with Komatsu powertrain assemblies. Coupling to the transmission or final drive is achieved through a torque converter or direct mechanical link depending on the machine type. Specific mounting bolt patterns and alignment shims are defined by the host machine's service manual.
All 6D95L-1AD(S/N 96999-UP) assemblies by section
Every catalogued assembly group for the Komatsu 6D95L-1AD(S/N 96999-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Engine
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Air Cleaner
| 01***30 | Screw | 2 |
| 01***06 | Nut | 6 |
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Air Cleaner (Air Connector Elbow Type)
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
| 07***09 | Clamp,(With Cylinder Cover) | 2 |
| 60***11 | Washer,Seal (K26) | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Air Cleaner (High Altitude Spec.)
| 01***20 | Bolt,(For Japan Pc200) | 4 |
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
| 07***09 | Clamp, Hose - At Water Pump | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Air Cleaner (With Extension)
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
| 07***09 | Clamp,(With Cylinder Cover) | 2 |
| 60***11 | Washer,Seal (K26) | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Air Intake (For 13a? 25a Alternator)
| 01***30 | Screw | 10 |
| 01***70 | Bolt | 4 |
| 01***85 | Bolt | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Air Intake (For 15a Alternator With Water Separator) (Noise Suppression Spec.)
| 01***30 | Screw | 10 |
| 01***70 | Bolt | 4 |
| 01***85 | Bolt | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Air Intake (For 15a Alternator)
| 01***30 | Screw | 10 |
| 01***70 | Bolt | 6 |
| 01***85 | Bolt | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Air Intake (For 15a Alternator) (Air Connector Elbow Type)
| 01***10 | Bolt (M10x1.50x10) | 4 |
| 01***30 | Screw | 10 |
| 01***85 | Bolt | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Air Intake (High Altitude Spec.)
| 01***30 | Screw | 11 |
| 01***70 | Bolt | 2 |
| 01***85 | Bolt | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Air Intake (With Water Separator)
| 01***10 | Bolt (M10x1.50x10) | 2 |
| 01***30 | Screw | 10 |
| 01***85 | Bolt | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Alternator (13a) (With Hardening Pulley) (Inner Parts)
| 60***71 | Alternator A. (13a),(With Hardening Pulley) | 1 |
| KD***31 | Bushing,Insulator | 2 |
| KD***80 | Packing | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Alternator (15a) (With Non Hardening Pulley) (Inner Parts)
| 60***50 | Alternator A. (15a) | 1 |
| KD***70 | Cover | 1 |
| KD***30 | Retainer | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Alternator (25a) (With Non Hardening Pulley) (Inner Parts)
| 60***40 | Alternator A. (25a) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***11 | Rear Bracket Ass'Y | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Alternator Mounting (13a) (With Hardening Pulley)
| 01***50 | Bolt | 1 |
| 01***40 | Bolt,(Shim 3-Piece) | 1 |
| 01***20 | Bolt,(For Japan Pc200) | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Alternator Mounting (15a) (With Non Hardening Pulley)
| 01***35 | Screw | 1 |
| 01***55 | Bolt | 1 |
| 01***06 | Nut | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Alternator Mounting (25a) (With Non Hardening Pulley)
| 01***50 | Bolt | 1 |
| 01***40 | Bolt,(Shim 3-Piece) | 1 |
| 01***20 | Bolt,(For Japan Pc200) | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Camshaft And Tappet
| 01***20 | Screw | 2 |
| 04***16 | Fitting Wedge | 1 |
| 06***06 | Bearing | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Cooling Fan
| 01***45 | Bolt | 6 |
| 01***30 | Screw | 6 |
| 60***20 | Fan,Cooling | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Cooling Fan (Reversible Fan Type)
| 01***45 | Bolt | 6 |
| 01***30 | Screw | 6 |
| 60***10 | Fan,(Reversible Type) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Crank Pulley (Hardening Pulley) (For 13a Alternator)
| 01***45 | Bolt,Nylock | 1 |
| 61***20 | Collar,Taper | 1 |
| 61***31 | Plate | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Crank Pulley (Non Hardening Pulley) (For 15a? 25a Alternator)
| 01***45 | Bolt,Nylock | 1 |
| 61***20 | Collar,Taper | 1 |
| 61***31 | Plate | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Crank Pulley (Non Hardening Pulley) (High Altitude Spec.)
| 01***45 | Bolt,Nylock | 1 |
| 61***20 | Collar,Taper | 1 |
| 61***31 | Plate | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Crankshaft
| 62***00 | Main Metal Ass'Y | 7 |
| 62***00 | Thrust Metal Ass'Y | 1 |
| 62***00 | Main Metal Ass'Y | 7 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Cylinder Block
| 01***16 | Screw | 4 |
| 04***20 | Pin,Dowel (Welded) | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Cylinder Block (High Altitude Spec.)
| 04***20 | Pin,Dowel (Welded) | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
| 04***08 | Adapter Sleeves | 6 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Cylinder Block Gasket Kit
| 07***05 | O-Ring,(Not Used With Emergency Str.) (K2) | 2 |
| 07***35 | O-Ring,Hydraulic Oil Filter | 1 |
| 07***50 | O-Ring,Front Cover Plate | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Cylinder Block Gasket Kit (High Altitude Spec.)
| 01***12 | Washer,Lock? Injection Gear | 1 |
| 01***16 | Washer,Lock? Injection Gear | 1 |
| 07***80 | O-Ring,Hydraulic Oil Filter | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Cylinder Head
| 01***32 | Washer, (Without Emergency Steering) | 25 |
| 02***04 | Plug, Pipe | 1 |
| 07***08 | Plug, Expansion | 6 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Cylinder Head (High Altitude Spec.)
| 01***32 | Washer, (Without Emergency Steering) | 25 |
| 02***04 | Plug, Pipe | 1 |
| 07***08 | Plug, Expansion | 6 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Cylinder Head Gasket Kit
| 08***14 | Band,(For Additional Fuel Strainer) | 2 |
| 08***19 | Band,(Without Air Conditioner) | 2 |
| 61***30 | Gasket,Air Cleaner | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Cylinder Head Gasket Kit (High Altitude Spec.)
| 07***18 | O-Ring,Turbocharger Lubricating Pipe | 1 |
| 08***14 | Band,(For Additional Fuel Strainer) | 2 |
| 08***19 | Band,(Without Air Conditioner) | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Damper
| 01***16 | Bolt,(With Alternator Cover Type) | 6 |
| 62***00 | Damper,(Except Japan Pc200) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Engine Mounting
| 01***45 | Bolt,(For Power Tilt Mech Angle) | 6 |
| 01***55 | Bolt, Mount Tube To Switch Pump | 5 |
| 01***35 | Bolt, Bolt, Mount Tubes To Switch And Work Pumps | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Exhaust Manifold
| 01***25 | Grub Screw | 4 |
| 01***45 | Bolt, Bracket Mounting | 12 |
| 61***50 | Nut | 4 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Exhaust Manifold (High Altitude Spec.)
| 01***25 | Grub Screw | 4 |
| 01***90 | Bolt,(For Large Fan) | 12 |
| 07***08 | Plug,(For W/O. Corrosion Resistor) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Flywheel
| 01***30 | Bolt | 6 |
| 06***04 | Bearing,Ball | 1 |
| 62***10 | Washer | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Flywheel Housing
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 11 |
| 07***15 | Plug | 1 |
| 61***32 | Seal? Rear (K2) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Front Cover
| 01***16 | Bolt | 2 |
| 01***16 | Screw | 3 |
| 01***65 | Bolt,(For 35a? 25a Alternator) | 15 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Front Cover (With Cover)
| 01***16 | Bolt | 2 |
| 01***20 | Bolt,(With Tachometer Outlet) | 9 |
| 01***16 | Screw | 3 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Front Hanger (For 13a? 25a Alternator)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 62***50 | Hanger,Front (With Tension Pulley) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Front Hanger (For 15a Alternator)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 62***30 | Hanger,Front (W/O Corrosion Resistor) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Front Power Take Off
| 06***07 | Bearing | 1 |
| 06***08 | Bearing,Ball | 1 |
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Filter (For 13a? 25a Alternator)
| 01***85 | Bolt | 2 |
| 01***15 | Bolt,(With Water Separator) | 2 |
| 01***16 | Washer,(With Water Separator) | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Filter (For 15a Alternator)
| 01***20 | Bolt | 2 |
| 07***12 | Gasket,(Without Air Compressor Type) (K1) | 6 |
| 07***14 | Bolt,Joint | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Filter (High Altitude Spec.)
| 01***75 | Bolt,(For Shipping) | 2 |
| 01***00 | Bolt | 2 |
| 01***16 | Washer,(With Water Separator) | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Injection Pump (Feed Pump) (Inner Parts)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***10 | Feed Pump Ass'Y,(Not Shown) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Injection Pump (Feed Pump) (Without Stop Motor) (Inner Parts)
| DK***20 | Bolt, Joint | 1 |
| DK***00 | Valve,Check | 2 |
| DK***10 | Feed Pump Ass'Y,(Not Shown) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Inner Parts)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
| DK***20 | Capsule,Spring | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Without Stop Motor) (Inner Parts)
| DK***42 | Governor Ass'Y | 1 |
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Inner Parts)
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
| DK***00 | Bushing | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Without Stop Motor) (Inner Parts)
| DK***00 | Gasket | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)
| 62***40 | Injection Pump Ass'Y | 1 |
| DK***30 | Key,Woodruff | 1 |
| DK***30 | Bearing | 0 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Without Stop Motor) (Inner Parts)
| 62***80 | Injection Pump Ass'Y | 1 |
| DK***30 | Key,Woodruff | 1 |
| DK***30 | Bearing | 0 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Inner Parts)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***00 | Sleeve,Control | 6 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Injection Pump (Pump) (2/2) (Without Stop Motor) (Inner Parts)
| DK***40 | Shim? 0.50mm, Shim, 0.50mm; Was Dk029311-0040 | 0 |
| DK***90 | Shim? 0.25mm, Shim, 0.25mm; Was Dk029311-0590 | 0 |
| DK***00 | Sleeve,Control | 6 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Injection Pump Lubricator
| 07***12 | Gasket,(Without Air Compressor Type) (K2) | 2 |
| 07***10 | Screw, Banjo Connector (M10-1.25x20) | 1 |
| 62***30 | Pipe,Oil | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Injection Pump Mounting
| 01***35 | Grub Screw | 4 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***20 | Bolt,(For Japan Pc200) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Injection Pump Mounting (Without Stop Motor)
| 01***35 | Grub Screw | 4 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Return (For 13a? 25a Alternator) (For 15a Alternator With Water Separator)
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
| 01***50 | Bolt,(For Shipping) | 1 |
| 04***10 | Clip,(With Accumulator) | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Return (For 13a? 25a Alternator) (Noise Suppression Spec.)
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
| 04***10 | Clip,(With Accumulator) | 2 |
| 07***05 | Tube | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Return (For 15a Alternator)
| 07***00 | Clip | 3 |
| 62***00 | Tube,Spill | 1 |
| 62***90 | Tube,Spill | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Fuel Return (High Altitude Spec.)
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
| 01***50 | Bolt,(For Shipping) | 1 |
| 01***85 | Bolt | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Head Cover
| 01***20 | Bolt,(For Japan Pc200) | 1 |
| 04***50 | Screw | 4 |
| 07***09 | Clamp,(See Fig. K0210-16a0) | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Head Cover (High Altitude Spec.)
| 01***20 | Bolt,(For Japan Pc200) | 1 |
| 04***50 | Screw | 4 |
| 07***09 | Clamp,(See Fig. K0210-16a0) | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Heater Switch
| 01***12 | Bolt | 2 |
| 01***20 | Bolt,(For Japan Pc200) | 2 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Holder (Inner Parts)
| 62***10 | Holder Ass'Y | 6 |
| DK***00 | Shim? 0.75mm | 0 |
| DK***00 | Shim? 1.200mm | 0 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Idler Gear
| 01***75 | Bolt - Cab To Rops | 1 |
| 04***20 | Ring, Snap | 1 |
| 06***06 | Bearing | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Injection Nozzle
| 01***35 | Bolt, Mount Bracket To Floor | 6 |
| 07***00 | Clip | 11 |
| 62***10 | Carrier | 6 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Injection Piping
| 01***25 | Screw | 4 |
| 61***30 | Clip | 1 |
| 62***00 | Clip Ass'Y | 4 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Muffler
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***16 | Screw | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Muffler (High Altitude Spec.)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 3 |
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 3 |
| 01***45 | Bolt, Bracket Mounting | 3 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Muffler (Noise Suppression Spec.)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 01***16 | Screw | 1 |
| 01***16 | Bolt,(With Alternator Cover Type) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Muffler Piping (High Altitude Spec.)
| 01***80 | Bolt, Mount Strainer Flange | 1 |
| 01***20 | Bolt,(For Japan Pc200) | 2 |
| 01***25 | Bolt,(With Corrosion Resistor) | 2 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Name Plate And Caution (English)
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Name Plate And Caution (French-English)
| 09***62 | Plate? Instruction,Air Cleaner (Double Element) | 1 |
| 60***90 | Plate? Caution,(French-English) | 1 |
| 60***50 | Plate? Caution,(French-English) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Name Plate And Caution (German-English)
| 09***61 | Plate? Instruction,(German-English) (Not Shown) | 1 |
| 60***80 | Plate? Caution,(German-English) | 1 |
| 60***40 | Plate? Caution,(German-English) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Name Plate And Caution (Indonesian-English)
| 09***61 | Plate? Instruction,(Indonesian-English)(Not Shown | 1 |
| 60***50 | Plate? Caution,(Indonesian-English) | 1 |
| 60***20 | Plate? Caution,(English-Indonesian) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Name Plate And Caution (Spanish-English)
| 09***61 | Plate? Instruction,(Spanish-English) (Not Shown) | 1 |
| 60***70 | Plate? Caution,Oil Filter And Bypass Filter | 1 |
| 60***30 | Plate? Caution,(Spanish-English) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Oil Filter
| 60***41 | Cartridge,Engine Oil Filter (D31s) | 1 |
| 60***42 | Cartridge,Engine Oil Filter | 1 |
| 62***10 | Nipple | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Oil Level Gauge
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 01***20 | Screw | 1 |
| 01***06 | Nut | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Oil Level Gauge (High Altitude Spec.)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 1 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 01***06 | Nut | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Oil Pan And Suction Tube
| 01***16 | Bolt, Mount Solenoid Valve | 30 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Screw | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Oil Pan And Suction Tube (High Altitude Spec.)
| 01***16 | Bolt, Mount Solenoid Valve | 30 |
| 01***12 | Bolt,(See Fig.0501) | 1 |
| 01***16 | Screw | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Oil Pump
| 01***16 | Screw | 4 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 62***10 | Valve | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Oil Pump (High Altitude Spec.)
| 01***16 | Screw | 3 |
| 01***30 | Bolt,(Water Separator Spec.) | 2 |
| 62***10 | Valve | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Piston
| 04***12 | Ring, Snap | 12 |
| 62***02 | Piston Ring Ass'Y,Per Cylinder | 6 |
| 62***10 | Pin,Piston | 6 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Rear Hanger
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 62***60 | Hanger,Rear | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Rocker Arm
| 01***65 | Bolt,(For Alternator Bracket Mount) | 8 |
| 61***30 | Circlip | 2 |
| 62***20 | Spring | 5 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Safety Guard (For 25a Alternator)
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Spare Parts
| 04***31 | V-Belt,(For Trimming Dozer) | 1 |
| 04***52 | V-Belt,(Sandy And Dusty Spec.) | 1 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Spare Parts (For 13a? 25a Alternator) (For Reversible Fan)
| 04***32 | V-Belt,(For Trimming Dozer) | 1 |
| 04***53 | V-Belt,(For Add. Air Compressor) | 1 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Spare Parts (For 13a? 25a Alternator) (Noise Suppression Spec.)
| 04***34 | V-Belt,(Tropical Sandy? Dusty Spec.) | 1 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 60***41 | Cartridge,Engine Oil Filter (D31s) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Spare Parts (For 15a Alternator)
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 60***41 | Cartridge,Engine Oil Filter (D31s) | 1 |
| 60***40 | Cartridge,Fuel Filter | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Starting Motor (5.5kw) (Inner Parts)
| 60***50 | Starting Motor Ass'Y,(5.5kw) | 1 |
| KD***30 | Bracket,Center | 1 |
| KD***20 | Cneter Bracket A | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Starting Motor Mounting (5.5kw)
| 01***30 | Bolt | 2 |
| 07***05 | O-Ring,(Not Used With Emergency Str.) (K2) | 1 |
| (6***0) | Starting Motor Ass'Y,(5.5kw) (See Fig.A6210-B0a2) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Stop Motor
| 01***16 | Bolt | 3 |
| 01***20 | Bolt,(With Tachometer Outlet) | 1 |
| 01***20 | Screw | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Tension Pulley (For 13a Alternator)
| 01***12 | Bolt | 4 |
| 01***25 | Bolt,(With Corrosion Resistor) | 1 |
| 01***65 | Bolt,(With Water Separator) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Tension Pulley (For 25a Alternator)
| 01***65 | Bolt, Mount Tube To Divider Valve | 1 |
| 01***20 | Bolt,(For Japan Pc200) | 1 |
| 01***06 | Nut | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Turbocharger (High Altitude Spec.) (Inner Parts)
| 62***20 | Turbocharger Ass'Y | 1 |
| GA***16 | Bolt | 6 |
| GA***64 | Housing,Turbine | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Turbocharger Oil Piping (High Altitude Spec.)
| 01***16 | Screw | 5 |
| 01***20 | Screw | 4 |
| 01***06 | Nut | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Water Pump
| 01***16 | Screw | 5 |
| 01***20 | Screw | 2 |
| 01***75 | Bolt,(For Shipping) | 4 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Water Pump (For Reversible Fan)
| 01***16 | Screw | 5 |
| 01***20 | Screw | 2 |
| 01***75 | Bolt,(For Shipping) | 4 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Water Pump Pulley (Hardening Pulley) (For 13a Alternator)
| 04***32 | V-Belt,(For Trimming Dozer) | 1 |
| 04***53 | V-Belt,(For Add. Air Compressor) | 1 |
| 62***50 | Pulley? Hardening,(Tropical Sandy? Dusty Spec.) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Water Pump Pulley (Non Hardening Pulley) (For 13a?25a Alternator)(Noise Suppression Spec.)
| 04***34 | V-Belt,(Tropical Sandy? Dusty Spec.) | 1 |
| 62***10 | V-Belt,Fan Drive | 1 |
| 62***80 | Pulley?Non Hardening,(Tropical Sandy? Dusty Spec.) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Water Pump Pulley (Non Hardening Pulley) (For 15a Alternator) (For Reversible Fan)
| 04***53 | V-Belt,(For Add. Air Compressor) | 1 |
| 62***61 | Pulley?Non Hardening,(For Japan Pc200) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Water Pump Pulley (Non Hardening Pulley) (For 25a Alternator)
| 04***32 | V-Belt,(For Trimming Dozer) | 1 |
| 04***53 | V-Belt,(For Add. Air Compressor) | 1 |
| 62***61 | Pulley?Non Hardening,(For Japan Pc200) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Water Pump Pulley (Non Hardening Pulley) (For 25a Alternator) (For Reversible Fan)
| 04***32 | V-Belt,(For Trimming Dozer) | 1 |
| 04***53 | V-Belt,(For Add. Air Compressor) | 1 |
| 62***51 | Pulley?Non Hardening,(With Tension Pulley) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Water Pump Pulley (Non Hardening Pulley) (One-Groove Pulley) (For 15a Alternator)
| 62***80 | Pulley?Non Hardening | 1 |
| 62***10 | V-Belt,Fan Drive | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Water Separator (For 13a? 25a Alternator)
| 01***25 | Bolt,(With Corrosion Resistor) | 2 |
| 01***10 | Bolt | 2 |
| 07***60 | O-Ring,(For Pc750?800?1800) (A2610) | 1 |
Komatsu : 6d95l-1ad(S/N 96999-Up) : Engine : Water Separator (For 15a Alternator)
| 01***25 | Bolt,(With Corrosion Resistor) | 2 |
| 01***10 | Bolt | 2 |
| 01***15 | Bolt,(With Water Separator) | 2 |
6D95L-1AD(S/N 96999-UP) serial number reference
The engine serial number plate is typically located on the left side of the engine block or on a metal data plate affixed near the valve cover. The prefix is the engine model code (e.g., 6D95L-1AD), which identifies the engine family and configuration, while the subsequent digits are the unique serial number within that range.
| Prefix | Identifies | Notes |
|---|---|---|
| 6D95L-1AD | Engine Model | Identifies the specific engine variant. The source text explicitly lists '6D95L-1AD (JPN) ENGINE SN 96999-UP' and '6D95L_1AD (US)ENGINE PARTS CATALOG'. The base model is identified as '6D95L-1' in engine identification guides. No specific 3-character PIN prefixes are listed in the source text for this engine; the 'prefix' is the engine model code itself. The serial number range for this engine variant is 96999-UP. |
Frequently asked questions
What is the engine model and displacement?
The engine is the Komatsu 6D95L-1AD (S/N 96999-UP), a 6-cylinder in-line diesel with a total piston displacement of 4,890 cm³ (298.4 cu in).
What is the operating weight of the machine?
Operating weight varies by configuration and attachment. For the Komatsu GD305-A-1A grader using this engine, the weight typically ranges from 15,000 to 20,000 lb (6,800 to 9,100 kg) depending on blade and ripper options.
What engine replaced the 6D95L-1AD?
The 6D95L-1AD was succeeded by electronically controlled engines such as the SAA6D95LE series to meet Tier 2 and later emissions standards, offering improved fuel efficiency and reduced emissions.
What 6D95L-1AD(S/N 96999-UP) owners discuss
What are the known powertrain and hydraulic behaviors associated with the Komatsu 6D95L-1AD engine series?
What undercarriage or wear patterns are typical for machines powered by this engine series?
What are the specific quirks or maintenance requirements for the 6D95L-1AD engine per the series documentation?
What are the common electrical or sensor issues reported for this engine series?
What should be checked when buying a used machine with a 6D95L-1AD engine (S/N 96999-UP)?
What are the fluid specifications and capacities for the 6D95L-1AD engine and associated systems?
What safety-critical fixes or inspections are required for the 6D95L-1AD engine?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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