TM 5-3810-306-34
t.
Inspect bushing (14) in crankcase (13).
If
y.
Measure outside diameter of front support
scored, replace bushing.
journal on crankshaft (11) as shown. Replace if
worn beyond 1.872 in. (47.55 mm).
u. Measure inside diameter of bushing (14).
Replace if worn larger than 1.8780 in. (47.701
mm).
Support crankcase when removing
bushing (14).
Using clean oil to lubricate
bushing bore, press new bushing until flush with
bore surface.
v.
Inspect crankshaft
(11)
for
scoring
and
scratches.
w. Measure outside diameter of rear coupling
journal on crankshaft (11) as shown. Replace if
worn beyond 1.872 in. (47.55 mm).
REASSEMBLY:
1. REASSEMBLE PISTON ASSEMBLY.
a. Install one retaining ring (19) and lubricate piston
pin bore with clean engine oil.
b. With connecting rod (17) in soft-jawed vice,
position piston (21) and insert piston pin (20). If
piston pin cannot be installed by hand, place
piston (21) into boiling water for five minutes.
x.
Measure outside diameter of connecting rod
c.
Install second retaining ring (19).
journal on crankshaft (11) as shown. Replace if
worn beyond 1.9345 in. (49.136 mm).
d. If not installed, install oil ring (22), piston ring
(23) and piston ring (24). Ensure that piston
rings are installed with part number or top side
pointed up.
9-12
