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komatsu 4D84 engine
komatsu 4D84 engine
komatsu 4D84 engine
komatsu 4D84 engine

Used Komatsu 4D84 Diesel Engine | 2.2L 4-Cylinder | Rebuilt for Mini Excavators

Parameter Specification
Engine Model Komatsu 4D84 Series
Displacement Approximately 2.2 Liters
Configuration Inline 4 Cylinder, 4-Stroke
Bore 84 mm
Power Output 36 HP to 44 HP, depending on model
Aspiration Naturally Aspirated
Fuel System Direct Injection
Cooling System Liquid-Cooled

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Are you looking for a replacement engine for your Komatsu mini excavator? This used Komatsu 4D84 diesel engine is a solid choice for many compact machines. The 4D84 is a vertical, water-cooled, 4-stroke diesel engine. It has four cylinders and a displacement of about 2.2 liters. The cylinder bore measures 84 mm. This engine is widely used in Komatsu’s PC series mini excavators. We have professionally rebuilt this used engine to restore its original performance. It offers a cost‑effective way to keep your equipment running.

Technical Specifications

Parameter Specification
Engine Model Komatsu 4D84 Series
Displacement Approximately 2.2 Liters
Configuration Inline 4 Cylinder, 4-Stroke
Bore 84 mm
Power Output 36 HP to 44 HP, depending on model
Aspiration Naturally Aspirated
Fuel System Direct Injection
Cooling System Liquid-Cooled

Key Features & Rebuild Quality

  • Built for Compact Machines: Komatsu designed this engine for smaller equipment. It fits well in mini excavators and compact loaders. Its size and power output match the needs of these machines.

  • Common Variants: This engine comes in several versions. These include models for different excavator series. This means replacement parts are widely available.

  • Proven in Komatsu Equipment: This engine powers many Komatsu models. It is used in the PC40 and PC45 series excavators. It is also found in some skid steer loader models.

  • Complete Rebuild Process: We fully disassembled this used engine. We inspected the cylinder block and cylinder head. We also serviced the fuel injection system. We replaced all critical wear parts with new components to meet original factory standards.

  • Ready to Install: This engine ships as a complete unit. It comes with pre-installed filters and fluids. Necessary mounting hardware is included. This makes the installation process more straightforward. It helps reduce equipment downtime.

Value & Warranty

  • Cost‑Effective Choice: This rebuilt used Komatsu engine costs much less than a new one. You get reliable power for your excavator at a fraction of the price.

  • Warranty Included: We stand behind our rebuild work. This engine comes with a comprehensive warranty. Contact us for the specific terms.

Primary Applications

  • Mini Excavators: Direct replacement for Komatsu PC40 and PC45 series models.

  • Skid Steer Loaders: Suitable for Komatsu compact loader models.

  • Compact Equipment: Used in various small construction machines.

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