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 TM 5-2420-224-34
PISTONS, RINGS, CONNECTING RODS, AND BEARINGS REPLACEMENT
(CONT)
Crankshaft Repair Stage Specifications
If bushing measurement is acceptable, inspect
3.
bushing for scratches, gouges, nicks, and
cracks. If any of these conditions exist,
replace bushing.
2.3620-2.3628
Standard
(59.995-60.015)
4.
Measure connecting rod journals on crankshaft
and compare with following table. If any
2.3581-2.3588
Standard I
measurements are not within any stage listed,
(59.895-59.915)
remove crankshaft and tag for repair. Install
new crankshaft. If any measurements are less
2.3522-2.3530
Stage I
than lowest dimension in stage IV, reject
(59.745-59.7651
crankshaft assembly.
2.3226-2.3234
Stage IV
(58.995-59.015)
Piston Rings
Groove Width
Piston Ring No.
In.
(mm)
5.
Inspect pistons for excessive wear, burn
0.119
(3.030)
I
spots, cracks, and gouges. If any of these
0.118
(3.015)
conditions exist, reject piston assembly.
0.121
(3.060)
II
6.
C h e c k ring groove width. If not within
0.120
(3.045)
tolerance, reject piston.
0.121
(3.060)
Ill
0.120
(3.045)
0.218
(5.540)
Iv
0.217
(5.525)
13-33
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