Komatsu 6D107 SAA6D107E-1 Diesel Engine Assembly | 6.7L 6-Cylinder Engine Compatible with Cum.mins QSB6.7 Komatsu PC200-8 PC220-8 Excavators

We supply complete, heavy-duty Komatsu 6D107 (SAA6D107E-1) and Cum.mins QSB6.7 diesel engine assemblies as well as precision engine overhaul parts. The 6.7L 6-cylinder high-pressure common-rail (HPCR) turbocharged diesel engine is direct-fit compatible with Komatsu 6D107 and Cum.mins QSB6.7 power configurations widely operating in 20 to 25-ton excavators and wheel loaders, including Komatsu PC200-8 / PC210-8 / PC220-8 / PC240-8 / WA380. Engineered to heavy-duty aftermarket standards, our 6D107 engine assemblies feature optimized HPCR fuel injection, providing maximum fuel efficiency, high low-end torque, and long-term durability in high-load digging environments.

• 20–25 Ton Class Hydraulic Excavators: Primary power unit for Komatsu Dash 8 series excavators performing trenching, quarry excavation, and heavy site earthmoving.
• Wheel Loaders & Heavy Handling Equipment: Delivers rapid throttle response and high breakout force for 3–5 ton wheel loaders (WA380 / WA320).
• Demolition & Hydraulic Hammer Operations: Built with high thermal endurance to withstand sudden hydraulic pressure surges from rock breakers and crushing grapples.
• Mining & Quarry Operations: Heavy-duty iron cylinder block and advanced oiling system resist extreme dust, high ambient heat, and continuous duty cycles.

To assist site mechanics and fleet service managers in diagnosing engine power issues, below is a troubleshooting breakdown for common Komatsu 6D107 / SAA6D107E-1 failures:

• Common Rail High-Pressure Faults & Sudden Engine Stalling: Caused by contaminated fuel degrading common-rail injectors (5263262 / 0445120), SCV valve sticking, or fuel pressure relief valve opening under load.
• Engine Overheating & Coolant Boiling: Triggered by blown cylinder head gaskets, EGR cooler leaks, water pump impeller cavitation, or clogged radiator channels under heavy hydraulic strain.
• Excessive Black, White, or Blue Exhaust Smoke: Black smoke signals incomplete fuel combustion from faulty common rail injectors or worn turbocharger (KVGT / Wastegate). White smoke indicates cold cylinder misfires or coolant entering combustion chambers. Blue smoke points to oil burning through worn piston rings or valve guides.
• High Crankcase Blow-by & Excessive Oil Consumption: Triggered by scored cylinder liners, stuck piston rings, or worn crankcase breather valves after long engine operating hours.
• Engine Knocking & Rough Idle Vibration: Resulting from injector coding errors (IMA code loss), uneven cylinder pressure, or main bearing shell clearance wear.

A: Yes. The Komatsu 6D107 (SAA6D107E-1) engine assembly shares architecture with the Cum.mins QSB6.7. Flywheel housing, bellhousing alignment, engine mount locations, starter ports, and ECU connector interfaces are 100% direct-fit compatible with Komatsu PC200-8, PC210-8, PC220-8, and PC240-8 excavators.

A: The Komatsu SAA6D107E-1 is a 6.69L (6.7L), 6-cylinder in-line, 4-stroke, turbocharged and air-to-air charge-cooled HPCR common-rail diesel engine, producing output between 110 kW and 125 kW (148–168 HP) at 2000 RPM.

A: Installing a factory pre-tested complete 6D107 engine assembly avoids extended machine downtime, eliminates hidden costs from cracked cylinder blocks or warped heads, and ensures instant, reliable performance upon installation.