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 TM 55-1905-221-14-3
6-28.1
CRANKSHAFT BEARINGS - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION/ITEM
ACTION
REMARKS
INSPECTION (Cont)
measuring bearing thickness,
unless a special micrometer
is available for this purpose.
The minimum thickness of a
worn standard main bearing
shell is .1540 inch (0.3912
cm) and, If any of the bear-
ing shells are thinner than
this dimension, replace all
of the bearing shells. A new
standard bearing shell has a
thickness of .1545 to .1552
inch (0.3922 to 0.3957 cm).
Bearing
Bearing
Minimum
Size
Thickness
Thickness
Standard
.1548"/.1553"
.1530"
.002" Undersize
.1558"/.1563"
.1540"
.010" Undersize
.1598"/.1603"
.1580"
.020" Undersize
.1648"/.1653"
.1630"
.030" Undersize
.1698"/.1703"
.1680"
6-491
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