TM 5-3805-261-34
ENGINE MAINTENANCE. (cont)
13-8.
Piston and Connecting Rod. (Sheet 6 of 12)
REMOVAL (cont)
NOTE
Perform the following step
only if piston pin bearing
needs replacement.
13. Using press and rod to press out
bearing, remove bearing (9), if
necessary.
CLEANING
Clean all parts. Refer to Chapter 2.
INSPECTION
NOTE
Sets of bearings, connecting
rods and caps must be
installed in the same
cylinder from which they were
removed. Keep each set
separate. Inspect one at a
time.
1.
Inspect cap (2) and connecting
rod (11, Figure 13-44). Replace
as an assembly if cracked,
pitted, scored or excessively
worn.
2.
Inspect piston (8). Replace if
cracked, scored, grooves damaged
or signs of overheating.
3.
Measure bore diameter of piston
pin bearing (9). Use bore gage
and measure in two places, 90
degrees apart. The correct
dimension is 1.7012 inches.
Replace piston pin bearing (9) if
dimension is not correct.
4.
Measure bore diameter in piston
(8) for pin (7). Use bore gage
and measure in two places, 90
degrees apart. The correct
dimension is 1.07006 inches.
Replace piston (8) if dimension
is not correct.
Go to Sheet 7
13-45
Figure 13-44.
