|
| |
TM 9-2320-364-34-4
20-100
20-42. MAIN BEARING AND CRANKSHAFT REMOVAL (CONT).
NOTE
Turn crankshaft to aid in removing bearing shell from under bearing journal.
(14)
With the aid of an assistant, push upper bearing shell (16) out from under crankshaft (2) main bearing
journal No. 2 (17) with bearing shell remover while turning screw (18) to turn crankshaft. Remove and
discard bearing shell.
(15)
Repeat Step (14) for crankshaft main bearing journals No. 3 (19) and No. 4 (20).
(16)
Position dial indicator on engine block (11)
and main bearing journal No. 2 (17).
NOTE
Maximum allowable runout for
journals No. 2 and No. 4 is
0.002 in. (0.05 mm). Maximum
allowable runout for journal
No. 3 is 0.004 in. (0.102 mm).
Difference between runout
measurements for two adjacent
journals must not exceed 0.003
in. (0.076 mm). When runout
high spots are at right angles to
each other, sum of their runout
measurements must not exceed
0.004 in. (0.102 mm).
Crankshaft must be replaced.
(17)
Turn screw (18) to turn crankshaft (2),
and read runout of main bearing journal
No. 2 (17), No. 3 (19) and No. 4 (20) with
dial indicator.
|
