|
| |
TM 5-4320-305-24
4-11. REPLACE/REPAIR CONNECTING ROD ASSEMBLY (Continued)
NOTE
Clean rust preventive from replacement connecting rod. Also make sure the bearing cap is
thoroughly cleaned to prevent trapped contaminants from adversely affecting the bearing shells.
9
Temporarily reassemble dowel pin (1) and bearing
cap (2) with big-end bolts (3) onto match-marked
connecting rod (4). Tighten bolts to 22. 13 ft-lb (30
N-m) torque. Using a torque gage, retighten bolts an
additional 60 degrees, then an additional 30 degrees.
10
Measure width of connecting rod (4) with micrometer.
Measurement should be 1.3960 to 1.3984 inches (35.
46 to 35. 52 mm). If measurement is outside
specified limits, replace connecting rod.
11
Measure connecting rod bore with inside micrometer.
Measurement should be 2.6771 to 2.6779 inches
(68.0 to 68. 019 mm). If measurement is outside
specified limits, replace connecting rod (4) including
bearing cap (2), small-end bushing (5), bearing shells
(6), and big-end bolts (3).
12
Inspect bearing shells.
a.
Inspect upper and lower bearing shells for
excessive
wear,
scoring,
pitting,
flaking,
etching, and signs of overheating.
b.
Inspect bearing shell backs for bright spots
(bearing moving in bearing shells).
c.
Measure bearing shell width. Measurement
should be 1.0157 to 1.0236 inches (25.8 to 26.0
mm). If measurement is outside specified
limits, replace bearing shells.
d.
Measure bearing shell wall thickness (1) with a
micrometer (2) and ball attachment (3). The
minimum thickness of a worn standard bearing
shell
is
0.0778
inch
(1.976
mm).
If
measurement is below specified limit, replace
bearing shells.
4-86
|
