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 TM 55-1905-223-24-1
NOTE
The upper main bearing shells are grooved and drilled for lubrication. No. 1 and
9 are 1/8 inch (3.17 mm) narrower than Nos. 2 through 8; locate them
accordingly.
c.
Lubricate the crankshaft journals and upper main bearing shells with a coat of clean engine lubricating
oil.
WARNING
The crankshaft is heavy. To avoid personal injury or equipment damage, use a
lifting sling or get assistance when lifting the crankshaft.
CAUTION
Do not cock the crankshaft during installation; damage to the bearing shells may
result. If the crankshaft cocks, remove it and inspect the condition and location of
the bearing shell and the condition of the thrust flange face.
d. Use a suitable hoist and lifting device to carefully lower the crankshaft into position (FIG. 4-50).
Ensure the end of the crankshaft with the gear that has the smallest diameter points toward the front of
the block.
CAUTION
The grooves in the thrust bearings must point toward the flange on the crankshaft
or the engine will be damaged.
e. Lubricate the thrust bearings (1, FIG. 4-57); position with the grooved side of the face toward the
crankshaft thrust flange (2) one on either side of flange and slide them into place in the thrust bearing
retainer.
FIGURE 4-57. Crankshaft Thrust Bearing Removal/Installation.
4-51
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