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TM 10-3930-673-34
3-9. CRANKSHAFT MAIN BEARINGS REPLACEMENT (CONT)
(8)
Install main bearings halves (5 and
6) positions no. 1 and no. 7.
(a)
Install main bearing halves (5 and
6) position no. 1, Steps (3)(a)
through (e).
CAUTION
Be very careful not to scratch the
crankshaft or the bearing bore
during the installation of the upper
bearing half. A scratched or
damaged crankshaft, or bearing
TR01425
bore, could result in premature
engine failure.
(b)
To install upper bearing half (5) position no. 1 into bearing bore, simultaneously push the
upper bearing half with a flat blade screwdriver and turn the crankshaft (1) until bearing tab
is in notch in cylinder block.
(c)
Continue with main bearing halves (5 and 6) position no. 1 Installation, Steps (3)(i), (j), and
(m) through (o).
(9)
Check crankshaft (1) rotation.
Crankshaft (1) must turn freely. If it does not turn with relative ease, check main bearing halves (5
and 6) installations and size of bearings.
(10) Check crankshaft (1) end play (Para 3-8).
NOTE
Follow-on Maintenance:
Install oil inlet tube (Para 3-24).
Install oil pan (Para 3-23).
END OF TASK
3-86

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