ARMY TM 9-2815-254-24
AIR FORCE TO 38G1-94-2
SECTION II. EQUIPMENT DESCRIPTION AND DATA
The diesel engine (FIGURE 1-1) is four cylinder, four cycle, fuel injected, naturally-aspirated, and liquid-cooled.
The firing order is 1-3-4-2. The number one cylinder is toward the fan end of the engine. The serial number is found
on left side of the cylinder body at number one cylinder location. Rotation of engine is counterclockwise as viewed
All locations referenced herein are given facing the flywheel end (rear)
of the engine.
Cooling System. The cooling system consists of a radiator, water pump, cooling fan, thermostat, and connecting
hoses. The fan is mounted on shaft of water pump and both are belt driven from the crankshaft pulley. The thermo-
stat controls engine temperature and is installed in the top of engine. The function of the cooling system is to main-
tain a specific operating temperature of 180° to 203°F (82° to 95°C) for the engine.
Lubrication System. The lubrication system consists of the oil pan, a gerotor type oil pump, spin-on type oil filter,
and internal passages within the engine. There are two external oil lines, one for rocker arm lubrication and one
for fuel injector pump lubrication.
Fuel System. The function of the fuel system is to inject a metered quantity of clean atomized fuel into the engine
cylinders at a precise time near the end of the compression stroke of each piston. The fuel system consists of
the fuel tank, fuel filter/water separator, fuel injection pump, and the fuel injectors. The fuel tank and fuel filter/wa-
ter separator are not mounted on engine. The injection pump is mounted on the front cover and is driven by the
Electrical System. The electrical system is 24 VDC operation and consists of an alternator, starter, externally
mounted batter and other items as required. The alternator is mounted on front of engine and is belt driven.
When the engine is operating, the alternator supplies 24 VDC to recharge the battery and maintain it at a full state
of charge. The starter is mounted on the flywheel housing and when energized engages the ring gear of the fly-
wheel to rotate the engine.