General. The dozer is equipped with a Caterpillar C6.6 Acert turbocharged diesel engine with six in-line cylinders,
generating 125 hp @ 2,100 RPM.
Fuel System. Diesel fuel is drawn from the tank by a fuel transfer pump, filtered by a primary fuel filter, routed to
the fuel injection pump and secondary fuel filter, and then injected through the fuel injector nozzles into the engine
cylinders. Air is drawn in through dry-type, replaceable filter elements. A dust ejector (check valve) removes incom-
ing dust from the air and routes it out through the exhaust system.
Cooling System. Provides coolant to the engine. Coolant is circulated through the engine by a gear-driven water
pump. The hydraulic system oil cooler is located next to the radiator. The engine oil cooler is integral to the engine.
Lubrication System. The engine lubrication system consists of a gear-driven oil pump, oil filter, oil cooler, and oil
pan. The engine is lubricated by cooled and pressurized oil that is circulated through the engine block and head.
Exhaust System. The exhaust system removes exhaust gases from the engine through the exhaust manifold and
turbocharger. The gases flow into exhaust pipes and a muffler to the atmosphere above the cab.
Figure 1. Engine Components.