ARMY TM 9-6115-464-12
AIR FORCE TO 35C2-3-445-1
NAVY NAVFAC P-8-624-12
Section XIII. UNIT MAINTENANCE OF THE ENGINE ASSEMBLY
4-55 GENERAL. Rotational power for driving the generator is developed by a water cooled, four cylinder, four
cycle, compression ignition diesel engine. Unit maintenance of the engine assembly is limited to inspecting the
crankshaft pulley, inspecting and replacing the intake and exhaust manifolds, inspecting the rocker arm assembly,
adjusting the valve tappet clearance, and testing the engine assembly.
4-56 CRANKSHAFT PULLEY.
a. General. The crankshaft pulley is mounted on the front end of the engine crankshaft and pulls the drive
belt for the water pump, radiator cooling fan, and alternator.
b. Inspection.
(1) Inspect v-belt groove for “step” wear along side and bottom of groove which would indicate excessive
wear.
(2) Check for cracks in v-belt groove and around crankshaft hub.
4-57 INTAKE MANIFOLD.
a.
Removal.
(1) Refer to paragraph 4-51 and remove air cleaner assembly.
(2) Remove nuts and Lockwashers (FIgure 4-35) to remove intake manifold and gaskets. Discard gaskets.
b. Cleaning and Inspection.
(1) Clean intake manifold with a stiff bristle brush and an approved solvent.
(2) Scrape all gasket remains from the mating surfaces of intake manifold and cylinder head.
(3) Inspect intake manifold for cracks, excessive corrosion and other damage.
(4) Check all threaded parts for stripped or otherwise damaged threads.
c.
Installation.
(1) Position new gaskets and install intake manifold (Figure 4-35), install lockwashers and nuts. Torque
nuts 35 lbs-ft.
(2) Refer to paragraph 4-52 and install air cleaner assembly.
4-58 EXHAUST MANIFOLD.
a.
Removal.
(1) Refer to paragraph 4-53 and remove the muffler.
(2) Remove nuts and washers (Figure 4-36) to remove exhaust manifold and gaskets. Discard gaskets.
b. Cleaning and Inspection.
(1)
(2)
(3)
(4)
Clean exhaust manifold with a stiff bristle brush and an approved solvent.
Scrape all gasket remains from mating surfaces of exhaust manifold and cylinder.
Inspect exhaust manifold for cracks, excessive corrosion and other damage.
Check all threaded parts for stripped or otherwise damaged threads.
c.
Installation. Torque nuts to 35 lbs.-ft.
(1) Position new gaskets and install exhuast manifold (Figure 4-35), with washers and nuts.
(2) Refer to paragraph 4-53 and install the muffler.
4-79
