Komatsu 3D76E engine for Komatsu PC20MR‑2 PC20MR‑3 PC22MR‑3 PC26MR‑3 mini excavator
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Netherlands, Dieren
Netherlands, Dieren
The 4D95L (95mm cylinder bore) series is a four-cylinder, naturally aspirated engine designed for high torque output and long service life.
Type: 4-Cycle, Vertical, Water-cooled Diesel
Number of Cylinders: 4
Bore x Stroke: 95 mm x 115 mm
Displacement: 3.26 Liters
Aspiration: Naturally Aspirated
Combustion System: Direct Injection
Rated Output: Approximately 40 - 65 kW @ 2100-2500 RPM (Application dependent)
2. Machine Compatibility and Application
The -1GG suffix denotes a specific configuration for Komatsu’s hydraulic excavators. It is a direct fit for several historical and modern-classic models:
PC60-3 / PC60-5 / PC60-6: Provides the balanced power-to-weight ratio required for 6-ton class utility work.
PC75UU-1: The compact "Ultra-Urban" model relies on the 4D95L for its small footprint and steady hydraulic performance.
PC100-5 / PC120-5 / PC130-5: In these larger chassis, the 4D95L serves as a fuel-efficient power plant capable of sustaining high breakout forces for trenching and loading.
3. Key Technical Features
Direct Injection System: Unlike smaller indirect engines, the 4D95L uses direct injection for better fuel economy and easier starting in colder environments.
Heavy-Duty Crankshaft: Features a forged steel crankshaft with induction-hardened journals to withstand the constant load variations of hydraulic digging.
Linerless Block Design: The high-strength alloy cast iron block is designed for multiple re-bores, allowing for a long total engine life through several overhauls.
Integrated Oil Cooler: Essential for maintaining oil viscosity during the high-heat operations typical of 10-ton+ excavators.
4. Maintenance and Service Protocol
To maximize the life of your 4D95L engine, adhere to these standard Komatsu service intervals:
Engine Oil: Change every 250 to 500 hours using SAE 15W-40 CD/CE or higher grade oil.
Fuel System: The mechanical fuel injection pump is robust but sensitive to water. Drain the primary fuel filter/water separator daily and replace filters every 500 hours.
Cooling System: Ensure the radiator fins are clear of debris. Use a 50/50 mix of water and anti-corrosion coolant to protect the internal water jacket.
Air Intake: Given the dusty environments of excavation, inspect the air cleaner daily. A restricted air flow will lead to black smoke and premature engine wear.
5. Professional Support and Logistics
With over 13 years of expertise in Komatsu engine parts, we provide comprehensive solutions for the 4D95L:
Genuine & OEM Parts: We supply everything from complete overhaul kits (pistons, liners, gaskets) to individual fuel injectors and water pumps.
Engine Assemblies: Available in "Complete Brand New" or "Professional Remanufactured" configurations, including fuel system and electrical components.
Fitment Guarantee: We cross-reference your machine serial number to ensure the flywheel, housing, and fan configurations match your specific excavator model.
Global Logistics: All engines are crated in export-standard, shock-proof wooden boxes and shipped via express air or sea freight to minimize downtime.
6. Ordering Information
To ensure 100% fitment for your Komatsu PC60, PC75, or PC120, please provide:
The Engine Serial Number (stamped on the nameplate on the side of the block).
The Machine Model and Serial Number (found on the chassis plate).
A photo of the hydraulic pump mounting side to confirm the flywheel housing type.