Komatsu SAA6D140E-2 Engine Assembly for PC650-5 PC650-6 Excavators D155 Bulldozers GD825A-2 Motor Grader WA700-3

The Komatsu S6D140E (SAA6D140E-2) Engine Assembly is an inline 6-cylinder, 15.24L mechanical direct injection diesel engine equipped with a turbocharger. It is purpose-built for Komatsu PC650-5 and PC650-6 excavators, D155 bulldozers, GD825A-2 motor graders, WA700-3 large loaders, and other heavy mining equipment.

Featuring a robust structure and Tier 2 emission compliance without aftertreatment, this engine delivers stable and reliable performance under the most demanding mining conditions. Both new and remanufactured engine assemblies are available.

• Poor injector atomization — leads to incomplete combustion, black smoke, and power loss.
• Fuel pump plunger wear — causes hard starting and unstable idle speed.
• Oil leakage at the fuel injection pump drive shaft oil seal (typical inherent issue).
• Cylinder liner and piston ring wear — results in excessive blow-by gas and high oil consumption.
• Turbocharger oil seal aging and oil leakage.
• Scale blockage in the cooling system — causes engine overheating and risk of cylinder scoring.
• Clogged air filter — leads to insufficient air intake, weak power, and poor acceleration.
• Damaged cylinder head gasket — causes coolant leakage into the cylinder and abnormal water temperature.