T M 5-6115-457-34
Bearing (half) (14)
Thrust washer (2)
3. Rotate crankshaft one complete
8 - 2 2 3 . CLEANING.
revolution. Remove main bearing cap (3,
the plastic strip. This measurement is the
Cleaning Solvents are f lammable and
m a i n bearing clearance. The maximum
moderately toxic to skin, eyes and
allowable clearance is 0.010 inch. If
respiratory tract. Eye and skin
allowable limit is exceeded, replace main
protection required. Good general
ventilation is normally adequate.
bearing. Repeat inspection for each main
a. Clean bearing caps and bearing
halves in an approved cleaning solvent, and
b. Clean crankshaft in an approved
f o r excessive wear. If maximum allowable
cleaning solvent, and dry thoroughly
wear limits have been exceeded, replace
Lubricate and wrap the bearing journals
c . Clean oil passages in the crankshaft
g. Inspect crankshaft for scoring or
with a small soft brush.
galling on crankpin and main journals.
8 - 2 2 4 . INSPECTION.
a. Inspect bearing surfaces for scoring,
h. Inspect crankshaft gear (7) for
f l a r i n g , chipping, and cracks.
broken or chipped teeth. If defective,
b. Inspect main bearing caps for high
r e p l a c e gear.
spots and burrs.
c. Inspect for damaged threads.
i . Inspect keyway in crankshaft and
test woodruff key for a snug fit. Perform
this inspection only if crankshaft gear
c l e a r a n c e s . If limits are exceeded, replace
( 7 ) had been removed for repair or
to crankshaft clearance as follows:
j . Inspect thrust washer contact area
at rear of crankshaft, on either side of
1. Place a small strip of approved
rear main crankshaft bearing journal for
plastic between lower bearing half (4, fig-
excessive wear or roughness.
ure 8-63) and crankshaft. Light grease will
hold the plastic strip in position.
k. Inspect machined surface, at rear
of crankshaft that comes into contact with
2. Install main bearing cap (3) and
rear oil seal, for a grooved condition.
torque bolts from 165 to 185 foot-pounds.