ARMY TM 9-6115-464-34
AIR FORCE TO 35C2-3-445-2
NAVY NAVFAC P-8-624-34
h. The connecting rods are heavy alloy steel forgings with precision type bearings for the crankshaft and
bronze bushings for the full floating piston pin. The pistons are made of aluminum and are the solid type (no
saw slots or splits in the skirt). Each piston is fitted with five rings. The top three rings are compression type and
the fourth ring from the top is an oil control ring. The fifth ring is an oil scrapper ring.
i. The cylinder block and crankcase are cast as a single unit giving ridged support for the crankshaft. Cooling
is obtained by water jacketing the entire length of the block. When installed in the generator set, the block is
supported by the front engine support with rear support supplied through ridged coupling to the generator
assembly housing.
3-49. ENGINE FRONT SUPPORT.
a. Removal.
NOTE
If engine is not removed from the generator set, block the front of the engine prior to
removing the front engine support.
(1) Remove nut (1, figure 3-41), Iockwasher (2), ring (3), and crankshaft (4).
(2) Remove front engine support from crankshaft by removing bolt and Iockwasher.
b. Cleaning, Inspection, and Repair.
WARNING
Solvent, Dry Cleaning P-D-880, Type H is flammable and moderately toxic to skin,
eyes and respiratory tract. Eye and skin protection required. Good general ventilation
is normally adequate. Failure to observe this warning could result in servere personal
injury or death.
(1)
(2)
(3)
(4)
(5)
(6)
WARNING
Compressed air used for cleaning and drying purposes can create airborne particles
that may enter the eyes. Pressure shall not exceed 30 psig and use only with adequate
chip guards and chipping goggles.
Failure to observe this warning could result in
servere personal injury or death.
Clean all parts in a dry cleaning solvent (Federal Specification P-D-880) and dry thoroughly with
filtered compressed air. Remove caked grease deposits with a stiff bristle brush.
Inspect engine front support for cracks, corrosion, and excessive wear. Check inner surfaces for
scores, ridging, and other damage.
Check crankshaft pulley for corrosion, cracks, and step wear in v-belt groove.
Check all threads for crossing, stripping, and peening.
Repair minor thread damage with a thread chaser.
Replace any parts damaged beyond repair.
c. Installation.
(1) Install lockwasher (7, figure 3-41), bolt (6), to crankshaft to install engine front support (5)
(2) Install crankshaft (4), ring (3), Iockwaser (2) and nut (1).
3-101
