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 TM 10-3930-673-34
f. Installation.
(1)
Clean main bearing surfaces in
cylinder block (Para 3-9).
NOTE
If the crankshaft journals have been
ground, appropriate oversize
bearings will need to be installed.
(2)
Check upper and lower bearing
halves (14 and 18) and thrust
bearing (19) clearance.
NOTE
Install new main bearings dry at
this time. Be sure cylinder block
bearing bores, backsides of bearings,
and inner surface of bearing caps
are clean and dry.
(a)
Align tab of new upper bearing
half (18) with groove in crankshaft
bearing bore (cylinder block), and
press bearing half into place.
Perform this procedure for main
bearing positions (1 through 5 and
7).
(b)
Install thrust bearing (19) in
crankshaft bearing bore no. 6 with
tab in bearing bore groove.
CAUTION
Use only nylon straps, or
equivalent, to install crankshaft
into cylinder block. Be sure that
nothing metallic comes in contact
with the machined surfaces of the
crankshaft. A scratched or damaged
crankshaft could cause premature
TR01173
engine failure.
(c)
Attach nylon or equivalent straps to
the crankshaft (16).
3-63
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