TM 5-4320-302-14
6-17.
CONNECTING ROD ASSEMBLY (CONT)
Location/Item
Action
Remarks
12. Big-end bearings
Inspect upper and lower bearing for excessive wear,
scoring, pitting, flaking, etching, and signs of
overheating. Inspect bearing backs for bright spots
(bearing moving in supports). Measure bearing
width. Measurement should be 0.9724 to 0.9843
inch (24.7 to 25.0 mm). If measurement is outside
specified limits, replace bearings. Measure bearing
wall
thickness
with
a
micrometer
and
ball
attachment. The minimum thickness of a worn
standard big-end bearing is 0.0975 inch (2.476 mm).
If measurement is below specified limit, replace big-
end bearings.
13. Connecting
Remove hex bolts, bearing cap, and pin and
rod, big-end
carefully insert big-end bearing. Reinsert pin
bearing, and
and tighten hex bolts following procedure
bearing cap
described in step 10 above.
6-130