TM 5-6115-400-35
properly torqued. Never file or shim
(11) Install flywheel and flywheel housing.
a bearing cap to make the bearing
e. Crankshaft Gear Removal and Installation.
shell fit; install new bearing shells if
(1) The crankshaft gear may be removed
fit
on
the
crankshaft
is
from the crankshaft with a gear puller.
unsatisfactory.
The gear may be removed either with the
(7) Check end play on the crankshaft using a
crankshaft installed in the engine or after
dial indicator. The specified end play is
the crankshaft has been removed.
.007 inch-.015 inch and must not exceed
(2) To install crankshaft gear on crankshaft,
.023 inch. The end play is controlled by
install woodruff key in crankshaft. Heat
thrust flanges at the center main bearing
gear in oil to a temperature of
approximately 300 . Coat crankshaft, at
F
specified range, replace thrust flanges.
gear location, with a mixture of white lead
Thrust flanges are available in standard
and oil; drive or press gear onto
thickness (.151 inch-.153 inch) and .005
crankshaft.
inch, .010 inch, and .015 inch oversize.
Caution.
(8) Install connecting rod bearing caps and
Use asbestos gloves when handling
shells and check side clearance between
the heated gear. If crankshaft is
connecting rods and crankshaft journals.
installed In engine, make certain that
(9) Install oil pan, pump, and associated
timing mark on crankshaft is alined
tubing.
with timing mark on camshaft gear
(10) Install the timing gear housing cover.
when crankshaft gear is installed.
See figure 85.
61. Cylinder Block
a. General.
(1) The cylinder block is a one-piece casting
made of alloy cast iron. The cylinder
block is cored to receive removable wet-
type cylinder sleeves.
The cylinder
sleeves are surrounded by water jackets
which extend the full length of the cylinder
walls. Oil passages direct the oil from the
main oil gallery to the camshaft and main
bearings and through the rifle-drilled
connecting rods to the piston pins. A
horizontal oil passage through the center
of the cylinder block extends from the
main oil gallery to a vertical passage (on
the left side of the block) leading to a
small cavity from where two openings
extend to the rocker arm assemblies.
(2) The cylinder block, when ordered for
service, is furnished with camshaft
bearings, main bearing caps and
capscrews; the necessary plugs and
Figure 98. Center main bearing cap details.
various small parts.
135
