TM 5-4310-227-15
case assembly (25) and secure with
e q u i p m e n t manufacturer's instruc-
the four lockwashers (2) and bolts
tions. Care must be taken to avoid
(1). Torque the capscrews to 22 to
localized heating to prevent grinding
26 foot-pounds.
cracks. Use of grinding compound
s h o u l d be liberal during grinding
(6) Install the woodruff key (30) in the
T h e reground journal
operations.
keyway in the crankshaft (15).
should be polished absolutely smooth
(7) Position the crankshaft gear (31) on
a f t e r grinding and the crankshaft
the flywheel end of the crankshaft,
should be carefully inspected to deter-
in line with the woodruff key, and
mine if any cracks or defects have
press the gear in place with an arbor
developed either from heat or crowd-
press.
i n g of the grinding wheel during
Caution: Be sure the crankshaft is
grinding operations.
equally supported on all sides during
(8) Inspect the gasket and oil seat re-
g
pressing operations.
tainers in the drive pulley end plate
and the flywheel end plate for wear
(8) Lubricate the cone and rollers (24)
or damage. Replace defective or worn
with clean lubricating oil. Position
gaskets and oil seal retainers (a ( 9 )
cone and roller on the flywheel end
above).
of the crankshaft, with the cone taper
c. Reassembly and Installation.
outward, and press t h e cone and
(1) Install the gasket (6) and oil seal re-
roller in place with an arbor press.
t a i n e r (5) in the drive pulley end
Then install the other cone and roll-
plate (19).
er on the drive pulley end of the
(2) Install the gasket (6) and il seal re-
crankshaft in a similar manner.
tainer (5) in the flywheel end plate
(9) Turn the camshaft gear (14, fig. 4-
(3).
(3) Mount the drive pulley end plate (19)
ible from inside the crankcase. Install
in an arbor press, with the inside ma-
t h e crankshaft (2), gear end first,
chined surface facing upward, then in-
from the drive pulley end of the cyl-
stall a roller bearing cup (7) with the
i n d e r and crankcase assembly and
thin side of the cup pointing upward.
match the timing mark on the crank-
Press the roller bearing cup (7) with
shaft gear with the timing mark on
the thin side of the cup pointing up-
the camshaft gear.
ward. Press the bearing cup into the
drive pulley end plate until the thin
(10) P o s i t i o n the bearing plate gaskets
side of the bearing cup is flush lev-
(22, and 23, fig. 4-11) on the drive
el with the machined surface of the
pulley end plate (10), then slide the
plate.
p l a t e over the tapered end of the
(4) Position the other roller bearing cup
crankshaft (15 ) and secure to the cyl-
(7) at the bore in the flywheel end of
inder and crankcase assembly (25)
the cylinder and crankcase assembly
with the four lockwashers (21) and
(25), with the thin side of the cup
capscrews (20) torqued 22 to 26 foot-
pointed inward, and drive the roller
pounds.
bearing cup into the bore until the
Caution: The drive pulley end plate
outside edge of the bearing cup is
is stamped with the word TOP on the
flush level with the outer machined
edge. Be sure that this marking faces
surface of the cylinder and crankcase
toward the top of the cylinder and
assembly.
crankcase assembly when the plate is
(5) Position the paper gasket (4) and the
installed to insure adquate cone and
flywheel end plate (3) on the fly-
roller lubrication.
wheel end of the cylinder and crank-
4-32
