Komatsu 4D95LE-2B(S/N 100005-UP)
Maintenance schedule, common problems & OEM parts breakdown
The Komatsu 4D95LE-2B engine (S/N 100005-UP) is a 3.3-liter, 4-cylinder diesel powerplant used in the 95-2 series of compact construction equipment. It powers machines such as the PC60-7, PC75UU-3, PC78US-6, and BR100JG-2 mobile crusher. Production years for this specific engine configuration span the late 1990s through the early 2000s, serving as the successor to the mechanical 4D95LE-1 and predecessor to the electronic 4D95LE-3. The engine is configured for Tier 2/Stage II emissions compliance and delivers approximately 117 horsepower, designed for durability in compact excavator and loader applications.
Across the 4D95LE series, the primary change was the transition from mechanical fuel injection in the -1 variant to the electronic control and turbocharging enhancements found in the -2B and subsequent -3 generations. The 4D95LE-2B remains critical in the used and parts market because it bridges the gap between older mechanical systems and modern electronic engines, offering a simpler maintenance profile for technicians while providing the torque and efficiency required for modern compact equipment duties. Its widespread use in the PC60 and PC75 series ensures high parts availability and interchangeability with other 95-2 series models.
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 4D95LE-2B(S/N 100005-UP) specifications
Engine
| Model | 4D95LE-2B |
| Serial Range | 100005-UP |
| Displacement | 3.3 L (201 cu in) |
| Cylinders | 4 |
| Emissions Tier | Tier 3 / Stage IIIA (per 2007 tech paper context for 4D95LE series meeting Tier 3) |
Weights
| Operating Weight | Not documented for this exact serial range — verify with your dealer |
| Shipping Weight | Not documented for this exact serial range — verify with your dealer |
| Ground Pressure | Not documented for this exact serial range — verify with your dealer |
Dimensions
| Transport Length | Not documented for this exact serial range — verify with your dealer |
| Transport Width | Not documented for this exact serial range — verify with your dealer |
| Transport Height | Not documented for this exact serial range — verify with your dealer |
| Track Gauge | Not documented for this exact serial range — verify with your dealer |
| Ground Clearance | Not documented for this exact serial range — verify with your dealer |
Performance
| Travel Speed | 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)
| Engine Oil (Refill) | 7.0 L (1.85 US gal) |
| Coolant (Total) | 10 L (2.64 US gal) |
| Coolant (Engine Side) | 4.5 L (1.19 US gal) |
| 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 |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Komatsu 4D95LE-2B(S/N 100005-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 4D95LE-2B(S/N 100005-UP) beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Komatsu Oil Wear Analysis (KOWA) at every 500-hour interval to monitor iron, copper, and lead wear metals in the engine oil. Check coolant SCA concentration levels to prevent liner cavitation in the 4D95LE-2B cylinder block. Monitor hydraulic oil particle count and viscosity to detect pump wear early. Track fuel dilution and soot levels to assess combustion efficiency and filter loading. Use KOMTRAX telematics to correlate load frequency with fluid degradation rates for accurate service scheduling.
Corrective & Common Repairs
Address frequent failures in the 4D95LE-2B by inspecting the fuel injection pump for leaks and checking the turbocharger shaft play. Replace worn fan drive belts and alternator brushes to prevent electrical faults. Inspect the water pump impeller for corrosion and replace the thermostat if overheating occurs. Check the air intake system for leaks that cause black smoke or power loss. Verify the condition of the fuel lines and connectors to prevent air ingress and hard starting issues.
Overhaul & Rebuild Points
Plan for a major overhaul when valve clearance adjustments can no longer compensate for wear or when compression drops below specification. Inspect the crankshaft main and rod bearings for scoring or excessive clearance. Check the cylinder liner bore for taper and out-of-roundness exceeding limits. Evaluate the piston rings for break-in or carbon buildup. Replace the head gasket and resurface the cylinder head if combustion leakage is detected. Ensure all gaskets and seals are replaced during reassembly to prevent post-overhaul leaks.
Seasonal & Environment Servicing
In cold climates, use low-viscosity diesel engine oil and ensure the coolant mixture provides adequate freeze protection. Install fuel anti-gel additives if operating in freezing temperatures. In dusty environments, service the air filter more frequently and check the pre-cleaner. In high-humidity or coastal areas, inspect the electrical system for corrosion and check the battery electrolyte levels. Drain the fuel water separator daily to prevent microbial growth and injector damage. Clean the radiator and oil cooler fins regularly to maintain optimal operating temperatures.
4D95LE-2B(S/N 100005-UP) common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 07281-00197 | Clamp,(With Pre-Fuel Filter) | Fuel system service | Check fitment → |
| 600-311-7441 | Cartridge,Fuel Filter | Fuel system service | Check fitment → |
| 6206-73-6201 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| 6204-71-6250 | Fuel Filter Ass'Y | Fuel system service | Check fitment → |
| 09637-30163 | Plate? Instruction,Air Cleaner (Single Element) | Air intake service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
4D95LE-2B(S/N 100005-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 hardware or software failure | 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 |
| CA452 | Common rail pressure sensor feedback value too low | Fuel leak, sensor failure, or supply pump issue | Diagnose the fuel rail pressure sensor or pump lines |
| CA122 | Intake air pressure sensor feedback voltage too high | Sensor malfunction or wiring issue | Verify the intake pressure sensor and wiring |
| CA123 | Intake air pressure sensor feedback voltage too low | Sensor short or airflow restriction | Check for a sensor short or an airflow restriction |
| CA153 | Intake air temperature sensor feedback voltage too high | Sensor failure | Replace or test the IAT sensor |
| CA154 | Intake air temperature sensor feedback voltage too low | Sensor failure | Replace or test the IAT sensor |
| CA441 | Battery voltage too low | Weak battery or alternator failure | Replace the alternator or battery; check the voltage regulator |
| CA442 | Battery voltage too high | Alternator regulator failure | Replace the alternator or battery; check the voltage regulator |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
4D95LE-2B(S/N 100005-UP) attachments & work tools
Excavator Buckets
Pin-on buckets for the PC78MR-6 and PC78US-6 excavators are the primary work tools for this engine class. Typical capacities range from 0.26 to 0.60 cubic meters (0.34 to 0.78 cubic yards) depending on the specific machine model and material density. These buckets mount directly to the standard excavator linkage without requiring specialized hydraulic couplers.
Hydraulic Breakers
Hydraulic breakers are a common attachment for the PC78 series machines powered by the 4D95LE-2B engine. These tools require a dedicated hydraulic kit to divert flow from the main pump to the breaker circuit. Factory configurations often include a pilot-operated control valve and reinforced hose assemblies to handle the high-pressure pulsations.
Grapples and Clamps
Grapples for sorting and handling materials are available for the PC78MR-6 and PC78US-6 models. These attachments utilize the machine's auxiliary hydraulic lines for opening and closing functions. Mounting is typically achieved via the standard quick coupler system or pin-on brackets depending on the specific grapple design.
Hydraulic Hammers and Drilling Tools
Specialized drilling tools and hammers may be fitted to the PC78 series for rock excavation or foundation work. These tools require high-flow hydraulic kits and often necessitate a reinforced boom and arm configuration. Compatibility is verified against the specific auxiliary valve setup of the PC78US-6 or PC78MR-6.
Factory Guarding and Protection
Factory configurations for this engine class include heavy-duty guarding options for the radiator, hydraulic lines, and undercarriage. These guards are designed to protect the 4D95LE-2B engine and surrounding components from debris and impact damage in mining or demolition environments. Specific guard kits are matched to the PC78MR-6 and PC78US-6 machine models.
All 4D95LE-2B(S/N 100005-UP) assemblies by section
Every catalogued assembly group for the Komatsu 4D95LE-2B(S/N 100005-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Engine
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Air Cleaner (Double Element Type)
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
| 60***30 | Element Ass'Y,(Double Element)(Not Shown) | 1 |
| 60***40 | Element Ass'Y,(Double Element)(Not Shown) | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Air Cleaner (Single Element Type)
| 04***10 | Ring,See Fig. K4010-65a0 | 1 |
| 60***40 | Element Ass'Y,(Double Element)(Not Shown) | 1 |
| 60***11 | Washer,Seal (K26) | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Air Intake
| 01***12 | Bolt,(With Speedometer) | 4 |
| 01***65 | Bolt, Mount Tube To Divider Valve | 2 |
| 01***75 | Bolt (M10-1.50x75) | 6 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Air Intake Connector(#100005-101522)
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***35 | Bolt, Mount Bracket To Floor | 2 |
| 21***70 | Bracket | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Air Intake Connector(#101523-)
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 2 |
| 01***35 | Bolt, Mount Bracket To Floor | 2 |
| 21***70 | Bracket | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Alternator (25a) (With Non Hardening Pulley)
| (6***0) | Alternator A. (25a),(See Fig.A6010-B1e1) | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Alternator (25a) (With Non Hardening Pulley) (Inner Parts)
| 60***20 | Alternator A. (25a),(With Non Hardening Pulley) | 1 |
| KD***57 | Bearing,Ball? Front | 1 |
| KD***11 | Rear Bracket Ass'Y | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Alternator Mounting (For 25a Alternator)
| 01***35 | Bolt,(Cold Weather Spec.) | 1 |
| 01***25 | Bolt - Relay Mounting | 3 |
| 01***60 | Bolt, Mounting | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Camshaft And Gear
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 01***20 | Screw | 2 |
| 04***16 | Fitting Wedge | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Cooling Fan
| 60***20 | Fan,Cooling | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Cooling Fan Bolt(#100337-104743)
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 6 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Cooling Fan Bolt(#104744-)
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 6 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Cooling Fan Spacer Bolt(#100005-104941)
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Cooling Fan Spacer Bolt(#104942-)
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Crank Pulley (Non Hardening)(#100005-107086)
| 01***35 | Bolt | 1 |
| 62***10 | Washer | 1 |
| 62***20 | Pulley,Non Hardening | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Crank Pulley (Non Hardening)(#107087-)
| 01***45 | Bolt,Nylock | 1 |
| 61***31 | Plate | 1 |
| 62***21 | Pulley,Non Hardening | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Crankshaft(#100005-107086)
| 62***00 | Main Metal Ass'Y | 5 |
| 62***00 | Thrust Metal Ass'Y | 1 |
| 62***00 | Main Metal Ass'Y | 5 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Crankshaft(#107087-)
| 62***00 | Main Metal Ass'Y | 5 |
| 62***00 | Thrust Metal Ass'Y | 1 |
| 62***00 | Main Metal Ass'Y | 5 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Cylinder Block Cover
| 01***14 | Bolt,(W/Joy Stick Str.)(W/O Heater) | 2 |
| 01***14 | Bolt | 2 |
| 07***16 | Plug,(Without Air Compressor Type) | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Cylinder Block Gasket Kit
| 01***12 | Washer,Lock (Noise Suppression Spec.) (K2) | 1 |
| 07***18 | O-Ring,(See Fig.1601-29?1602-17) | 1 |
| 07***20 | O-Ring,Relief Valve | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Cylinder Block(#100005-105844)
| 04***20 | Pin,Dowel (Welded) | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
| 04***08 | Adapter Sleeves | 6 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Cylinder Block(#105845-)
| 04***20 | Pin,Dowel (Welded) | 2 |
| 04***28 | Pin, Dowel - Transmission Case, Pin-Dowel | 2 |
| 04***08 | Adapter Sleeves | 6 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Cylinder Head
| 01***32 | Washer, (Without Emergency Steering) | 17 |
| 02***04 | Plug, Pipe | 1 |
| 07***08 | Plug, Expansion | 4 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Cylinder Head Gasket Kit
| 07***40 | O-Ring,Water Pump Mount | 1 |
| 07***12 | Washer, Gasket,(Without Thermo Sensor) (K1) | 1 |
| 08***14 | Band,(For Additional Fuel Strainer) | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Dust Indicator
| 08***01 | Indicator,Dust (Japanese-English) | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Exhaust Connector
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Exhaust Manifold
| 01***45 | Bolt, Bracket Mounting | 8 |
| 62***10 | Manifold,Exhaust | 1 |
| 62***10 | Gasket (K1) | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Fan Belt
| 04***48 | V-Belt,(For 50a? 75a Alternator) | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Fan Spacer(#100005-104873)
| 62***20 | Spacer | 1 |
| 62***40 | Spacer | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Fan Spacer(#104874-)
| 62***50 | Spacer | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Flywheel
| 01***30 | Bolt | 6 |
| 61***61 | Washer, Plain (14mm) | 6 |
| 62***93 | Gear,Ring | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Flywheel Housing
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 11 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 07***15 | Plug,(Used When Without Heater) | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Front Cover
| 01***20 | Bolt,See Fig. K4010-11a0 | 6 |
| 01***16 | Bolt, Mount Solenoid Valve | 2 |
| 01***55 | Screw | 11 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Front Hanger
| 01***20 | Bolt, Hose Clamps (Inlet And Return Line Hoses) | 2 |
| 62***30 | Hanger,Front (W/O Corrosion Resistor) | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Fuel Filter(#100005-101837)
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 1 |
| 01***15 | Bolt | 1 |
| 01***30 | Bolt | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Fuel Filter(#101838-)
| 01***30 | Bolt - Lower Oil Cooler Outlet Tubemounting | 1 |
| 01***15 | Bolt | 1 |
| 01***30 | Bolt | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Fuel Injection Piping
| 01***12 | Bolt,(See Fig. K0210-16a0) | 2 |
| 01***25 | Screw | 2 |
| 62***10 | Tube,Injection? No.1 | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Fuel Injection Pump
| (6***0) | Injection Pump Ass'Y,(See Fig.A4010-B0a1) | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Fuel Injection Pump (Feed Pump) (Inner Parts)
| DK***20 | Bolt, Joint | 1 |
| DK***60 | Feed Pump Ass'Y | 1 |
| DK***00 | Valve,Check | 2 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Fuel Injection Pump (Governor) (1/2) (Inner Parts)
| DK***00 | Shim? 2.00mm,(High Altitude Spec.) | 0 |
| DK***00 | Adapter | 1 |
| DK***72 | Governor Ass'Y | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Fuel Injection Pump (Governor) (2/2) (Inner Parts)
| DK***00 | Gasket | 1 |
| DK***40 | Gasket,Air Compressor | 2 |
| DK***00 | Nut,Cap | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Fuel Injection Pump (Pump) (1/2) (Inner Parts)
| 62***40 | Injection Pump Ass'Y | 1 |
| DK***30 | Bearing | 0 |
| DK***20 | Shim, 1.40mm; Was Dk029311-7220, Shim? 1.4mm | 0 |
Komatsu : 4d95le-2b(S/N 100005-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 | 4 |
Komatsu : 4d95le-2b(S/N 100005-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 : 4d95le-2b(S/N 100005-Up) : Engine : Fuel Injection Pump Mounting
| 01***20 | Bolt | 1 |
| 01***35 | Grub Screw | 4 |
| 01***12 | Bolt,(With Speedometer) | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Fuel Lift Pump
| 07***16 | Tube | 1 |
| 60***10 | Cartridge | 1 |
| 62***50 | Clamp,Filter | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Fuel Return
| 07***00 | Clip | 7 |
| 62***81 | Cap,(See Fig.0421-17) | 1 |
| 62***00 | Hose,(See Fig.0421-14? 0421a-14) | 3 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Glow Plug
| 60***40 | Glow Plug,Glow | 4 |
| 62***20 | Wire | 1 |
| 62***10 | Lead | 3 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Head Cover
| 61***20 | Screw | 3 |
| 61***30 | Washer,(B) | 3 |
| 61***42 | Packing,Cylinder Head Cover | 3 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Head Cover Related Parts
| 07***09 | Clamp, Hose | 2 |
| 07***09 | Clamp,(See Fig. K0210-16a0) | 2 |
| 61***10 | Cap, Oil Filler | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Heater Signal
| 60***61 | Signal,Heater | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Idler Gear
| 01***70 | Bolt,(For 75a Alternator) | 1 |
| 04***12 | Pin,Spring (See Fig.0201) | 1 |
| 62***31 | Shank | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Injection Nozzle(#100005-106114)
| 01***35 | Bolt, Mount Bracket To Floor | 4 |
| 62***00 | Holder Ass'Y | 4 |
| 62***20 | Nozzle | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Injection Nozzle(#106115-)
| 01***35 | Bolt, Mount Bracket To Floor | 4 |
| 62***01 | Holder Ass'Y | 4 |
| 62***10 | Nozzle Holder | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Muffler
| 01***25 | Bolt, Mount Engine Oil Drain To Fuel Tank | 4 |
| 01***06 | Nut | 4 |
| 62***50 | Muffler | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Muffler (Lower Exhaust Pipe Type)
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Name Plate And Caution (English) (Double Emement Type)
| 09***63 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
| 62***20 | Plate? Caution,Head Cover | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Name Plate And Caution (Japanese) (Single Emement Type)
| 09***63 | Plate? Instruction,Air Cleaner (Single Element) | 1 |
| 62***10 | Plate? Caution,Head Cover | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Name Plate And Caution (Japanese-English)(#100005-102986)
| 04***50 | Screw | 4 |
| 60***20 | Plate | 1 |
| 60***21 | Plate | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Name Plate And Caution (Japanese-English)(#102987-104364)
| 04***50 | Screw | 4 |
| 60***21 | Plate | 1 |
| 62***20 | Plate,Instruction | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Name Plate And Caution (Japanese-English)(#104365-)
| 04***50 | Screw | 4 |
| 60***21 | Plate | 1 |
| 60***22 | Plate | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Oil Filter
| 01***20 | Bolt,(Forwarded Individually Parts) | 4 |
| 01***25 | Bolt - Relay Mounting | 14 |
| 01***35 | Bolt, Cover | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Oil Level Gauge
| 01***14 | Bolt,(W/Joy Stick Str.)(W/O Heater) | 1 |
| 01***50 | Bolt,(See Fig.A4010-C3w6) | 1 |
| 01***20 | Screw | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Oil Pan And Suction Tube
| 01***14 | Bolt,(W/Joy Stick Str.)(W/O Heater) | 22 |
| 01***16 | Bolt, Mount Solenoid Valve | 2 |
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Oil Pressure Switch
| 08***05 | Switch,Engine Oil Pressure | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Oil Pump
| 01***16 | Bolt, Mount Solenoid Valve | 4 |
| 01***25 | Bolt - Relay Mounting | 1 |
| 62***01 | Cover Ass'Y | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Piston
| 04***12 | Ring, Snap | 8 |
| 62***41 | Piston,(S) | 4 |
| 62***10 | Pin,Piston | 4 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Plug
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Rear Hanger
| 62***10 | Hanger,Rear | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Rocker Arm
| 01***65 | Bolt,(For Alternator Bracket Mount) | 5 |
| 62***20 | Spring | 3 |
| 62***10 | Arm,Rocker | 8 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Solenoid
| 01***14 | Bolt - Plate Mounting | 2 |
| 01***90 | Bolt,(For Large Fan) | 1 |
| 01***15 | Bolt | 2 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Spare Parts (For 35a Alternator)
| 04***48 | V-Belt,(For 50a? 75a Alternator) | 1 |
| 07***16 | Gasket,(For Pc750-6) (See Fig.A2110) | 1 |
| 60***10 | Cartridge,Engine Oil | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Starting Motor (3.0kw) (Inner Parts)
| 60***10 | Starting Motor Ass'Y,(3.0kw) | 1 |
| KD***40 | Pinion | 1 |
| KD***50 | Washer | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Starting Motor Mounting (3.0kw)
| 01***35 | Bolt,R.H. (For Add. Air Compressor) | 2 |
| 62***50 | Gasket,Starter | 1 |
| (6***0) | Starting Motor Ass'Y,(3.0kw) (See Fig.A6210-B0a1) | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Tacho Drive Cover
| 01***16 | Bolt, Mounting Transmission Control Switch | 2 |
| 01***16 | Bolt | 2 |
| 07***50 | Ring, Seal - Between Sections | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Tappet
| 62***10 | Tappet | 8 |
| 62***10 | Tappet Rod | 8 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Water Connector
| 01***20 | Bolt,(Forwarded Individually Parts) | 2 |
| 62***30 | Connector,Water Outlet | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Water Pump Pulley (Non Hardening Pulley)
| 62***80 | Pulley?Non Hardening,(Tropical Sandy? Dusty Spec.) | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Water Pump(#100005-104021)
| 01***16 | Screw | 5 |
| 01***55 | Screw | 3 |
| 07***40 | O-Ring,Water Pump Mount | 1 |
Komatsu : 4d95le-2b(S/N 100005-Up) : Engine : Water Pump(#104022-)
| 01***16 | Screw | 5 |
| 01***55 | Screw | 3 |
| 07***40 | O-Ring,Water Pump Mount | 1 |
4D95LE-2B(S/N 100005-UP) serial number reference
The 4D95LE-2B engine serial number is stamped directly onto the engine block, typically on the left side near the injection pump. The machine model prefix (e.g., PC78) is found on the chassis data plate riveted to the right-hand side of the cab or front frame.
| Prefix | Identifies | Notes |
|---|---|---|
| PC78MR-6-N | Mini Excavator | Serial range 1001-Up; engine 4D95LE-2B (100005-Up) |
| PC78US-5-NA | Mini Excavator | Serial range 1001-Up; engine 4D95LE-2B (100005-Up) |
| PC78US-6-N | Mini Excavator | Serial range 4001-Up; engine 4D95LE-2B (100005-Up) |
Frequently asked questions
What is the engine model for the Komatsu 4D95LE-2B (S/N 100005-UP)?
The engine model is the Komatsu 4D95LE-2B, a 3.3-liter, 4-cylinder, turbocharged diesel engine used in the 95-2 series of compact equipment.
What is the operating weight of machines powered by this engine?
Operating weight varies by configuration/series. Machines equipped with this engine, such as the PC60-7 and PC78US-6, typically range from approximately 6,000 kg to 8,000 kg (13,200 lb to 17,600 lb) depending on the attachment package and undercarriage type.
What engine replaced the 4D95LE-2B?
The 4D95LE-2B was succeeded by the 4D95LE-3 series (including S4D95LE-3 and SAA4D95LE variants), which introduced electronic fuel injection and updated emissions compliance for Tier 3/Stage IIIA standards.
What 4D95LE-2B(S/N 100005-UP) owners discuss
Does the Komatsu 4D95LE-2B engine use wet or dry cylinder liners?
What are the typical fluid capacities for the Komatsu 4D95LE-2B engine?
What are common hydraulic behaviors and failure patterns for Komatsu excavators of this era?
What electrical or sensor issues are frequently reported by owners?
What undercarriage or wear patterns are typical for this machine type?
What engine performance issues should be monitored?
What should be checked when buying a used machine with a 4D95LE-2B engine?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific 4D95LE-2B(S/N 100005-UP) part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.