TM 5-4320-300-14
6-10. PISTONS AND CONNECTING RODS (CONT)
Location/Item
Action
Remarks
26. Connecting
Replace if twisted or bent. Grind or replace if
rod
indications of cracks are revealed by magnetic
particle inspection. Stamp the cylinder number
on a replacement connecting rod and cap.
NOTE
Clean rust preventive from replacement connecting rod. Also make sure
the split line (cap to rod) is thoroughly cleaned to prevent trapped con-
CAUTION
Piston pin bushing damage may result if piston pin is refinished. Do not
refinish highly polished or lapped piston pin surface.
27 Piston pin
Replace if finish is destroyed or fretting is
visible.
28. Piston pin
Replace bushings which are excessively worn
bushings
or scored.
(in piston)
29.Piston pin
Replace bushings that are scored, show over-
bushing (in
heating, or are damaged.
connecting
rod)
30. Connecting
If either bearing shell is thinner than the
rod bearing
minimum, replace both bearing shells.
shells
NOTE
If crankshaft is to be reground, select bearing shells after checking final
crankshaft dimension.
31. Crankshaft
If crankshaft is damaged, repair or replace it
according to paragraph 6-11.
32. Connecting
Replace nozzle if blockage cannot be cleared
rod spray
with compressed air. To replace spray nozzle,
nozzle
remove connecting rod bushing.
33. Pistons
Replace piston if skirt diameter, out-of-round,
or taper is not within tolerance.
34. Piston-to-
Replace piston, liner, or both if clearance is
liner clearance
not within tolerance.
6-86
