TM 5-3805-261-34
ENGINE MAINTENANCE. (cont)
13-5.
Crankshaft Main Bearings. (Sheet 2 of 12)
REMOVAL (Front, Center and Rear Main
Bearings and Thrust Bearings)
NOTE
This task is divided into
two sections: removal of
front, center and rear main
bearings and thrust
bearings and removal of two
intermediate main bearings.
Each crankshaft bearing cap
has a number and an arrow.
The number indicates the
cap’s location in the
engine. It matches a
number on the outside of
the block, next to which
the cap is to be installed.
The caps are numbered in
order, from front of
cylinder block to rear.
The arrow on each cap must
point toward engine front.
1.
Remove six bolts (1), washers (2)
and three items 3 and 4 as an
assembly (Figure 13-14).
2.
Remove and discard lower half of
three main bearings (4) from
crankshaft bearing caps (3,
Figure 13-15).
3.
Install dial test indicator on
clean, machined surface at bottom
of cylinder block, fourth main
bearing journal from front
(Figure 13-16).
4.
Adjust contact pin until it just
touches the side edge of
crankshaft journal.
5.
Adjust dial face so indicator
reads "zero."
Figure 13-14.
Figure 13-15.
Figure 13-16.
Go to Sheet 3
13-22
