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Page Title:
Table 6-2. Crankcase Assembly Overhaul Standards |
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 Table 6-2. Crankcase Assembly Overhaul Standards
Ref.
Point of measurement
Wear limits
Component
Sizes and fits
letter
of new parts
**
Inside diameter of bearing bore in crankcase
Crankcase
4.7538 4.7553
A
**
Outside width of main thrust bearing cap and
2.0240
2.0260
B
thrust bearing surface in crankcase
Thickness of main bearing half at center (refer
0.2492
E
0.2499
to B-3, D-C, below)
Thickness of main bearing half 1 / 2 inch from
V
ends (to be 0.0005 to 0.0010 less than at
c e n t e r "E")
I n s i d e diameter of main bearing at proper
4.2585
4.2545
4.2575
D
torque tightness (90 degrees to split line)
(STD)
0.003 undersize
4.2555
4.2515
4.2545
4.2485
0.010 undersize
4.2445
4.2475
*
F
Inside width of main thrust bearing face
2.0300
2.0320
*
F
Fit of main thrust bearing over bearing cap and
0.0040L 0.0080L
B
thrust bearing surface in crankcase
C-D
Fit (oil clearance) of bearings on journals (refer
0.0040L
0.0080L
0.0100L
to table 6-9)
T
Outside width of main thrust bearing
2.4860
2.4880
2.4840
U
Thickness of main thrust bearing flange (refer
0.2270
0.2290
to B-3, D-C, above)
H
2.8356
Inside diameter of bearing bore in crankcase
2.8346
2.8353
liner (starter)
2.8346
2.8353
2.8356
Inside diameter of bearing bore in crankcase
Q
liner (generator)
T-G
0.0110
0.0150L
0.0190L
Fit (crankshaft end play) of thrust bearing in
journal (refer to table 6-9)
6-18
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