TM 5-3825-230-14&P
5-21. CONNECTING ROD ASSEMBLY REPLACEMENT/REPAIR (CONT).
b.
Cleaning/Inspection.
(1)
Inspect rod for cracks or warping.
(2)
Inspect rod bearings and crankshaft for
excessive wear.
(3)
Measure crankshaft rod journal using a
micrometer (1.5748 to 1.5755 in. [40.0 to
40.01 mm]).
(4)
Measure connecting rod bearings (6 and
7) to crankshaft clearance:
(a)
Install bearings (6) in connecting rod
(4).
(b)
Install bearing (7) in rod cap (8).
(c)
Place plastic gage strip on bearing
(7).
(d)
Install two screws (9) into rod cap (8) and install on connecting rod (4). Tighten to 29 lb-ft (39 N•m).
(e)
Remove two screws (9) and rod cap (8).
(f)
Width on plastic gage should be 0.0013 to 0.0029 in. (0.033 to 0.073 mm) on wrapper scale.
(g)
Clean plastic gage off bearing (7).
(5)
If connecting rod bearing to crankshaft clearance is not within tolerance, refer to step (3).
(6)
If crankshaft rod journal diameter measurement is within tolerance, replace connecting rod bearings and
recheck.
(7)
Measure
inside
diameter
of
upper
connecting rod bushing and the outside
diameter of wrist pin using calipers. The
difference between the two must be
between 0.0005 to 0.0011 in. (0.015 to
0.030 mm).
5-44
