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 TM 55-1905-223-24-1
CAUTION
Allow excess oil to drip from the capscrews before installation in the block.
Excess oil can result in hydraulic pressure causing the cylinder block to break.
(1)
Lubricate the main bearing capscrew threads with clean engine lubricating oil; coat under the
head of the capscrews (3) and hardened washers (4) with SAE 140W lubricant. Install
washers and capscrews in main bearing cap (1).
CAUTION
Ensure the side of the cap and bearing with the bearing locating tang is toward the tang in the block.
Do not rotate the crankshaft until the caps are pulled to the block. Damage will result if the bearings
move out of location.
NOTE
Keep the cap straight while moving it across the holes for the side bolts. There
is little or no clearance between the parts.
(2)
Install main bearing cap..
(3)
Turn capscrews by hand until capscrews touch thewasher or the main bearing cap.
CAUTION
Do not use impact wrenches. The main bearing shells can fail.
(4)
Use two wrenches. Tighten both capscrews at the same time to pull the main bearing cap
into position. Ensure the cap is touching the block. If not, check for bearing out of location.
NOTE
The side of the thrust bearing retaining plate (3, FIG. 4-48) that is machined must
be toward the main bearing cap.
i.
Install thrust bearing retaining plate (3), lockwashers (2), and capscrews (1). T rque capscrews to 30
o
ft-lb (40 N ).
m
4-53
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