PRINCIPLES OF OPERATION - TM-10-3930-673-340104

TM 10-3930-673-34

3-2. PRINCIPLES OF OPERATION

a. Construction. Engine is a six cylinder, inline, four-stroke-cycle, turbocharged, fuel injected, liquid

cooled diesel. A 4.02 in. bore and a 4.72 in. stroke produce a piston displacement of 359 cu. in. Engine firing

order is 1, 5, 3, 6, 2, 4, and engine rotation is clockwise, as viewed from front (fan) end. Cylinder number 1 is

closest to fan. Rated horsepower is 165 hp, at engine speed of 2500 rpm. Maximum rated torque is 400 ft-lb at

engine speed of 1500 rpm.

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b. Fuel System. Engine fuel system is described in Para 4-2.

c. Cooling System. Engine cooling system is described in Para 5-2.

d. Lubrication System. Engine lubricating oil is forced through various internal passages by an internally

mounted, gear type pump (1). Oil is cleaned by a disposable filter cartridge (2) and is cooled by engine coolant

flow through a cooler (3) mounted to the side of the engine. A pressure operated bypass valve (4) is

incorporated to provide continued oil flow around filter in the event filter becomes clogged. A differential

pressure of 20 psi will open filter bypass valve. A pressure regulating valve (5), located in the front of the

engine, is designed to open at a pressure of 60 psi to protect pump and other system components against

excessive pressures.

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