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CRANKSHAFT PULLEY
FLYWHEEL HOUSING

Maintenance Manual For 40 Ton Crane Crawler Mounted Page Navigation
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. . . .
4. The engine  is equipped with a vi-
bration damper and the pulley must be
drawn tight against the outer cone.
5. Tighten the crankshaft pulley retain-
i n g bolt as follows:
Figure 11B-103. Typical Flywheel
Assembly
Figure 11B-102. Crankshaft Pulley
Details
A scuff
flywheel bolts are removed.
plate is used between the flywheel and
A. Tighten the bolt to 180 lb-ft (244 Nm)
the bolt heads to prevent the bolt heads
torque.
from scoring the flywheel surface.
B. Strike the end of the bolt a sharp
A s t e e l r i n g g e a r , w h i c h meshes with the
b l o w with a 2 to 3 pound lead hammer.
starting motor pinion, is shrunk onto the
rim of the flywheel.
C. Tighten the bolt to 300 lb-ft (407 Nm)
torque and strike the bolt again.
retainer
split
tube
A
type
(Figure 11B-104) is driven in the end of
D. Tighten the bolt to 290-310 lb-ft
the crankshaft to prevent the pilot bear-
(393-421 Nm) torque.
ing from entering the crankshaft cavity.
NOTE
The flywheel is machined to provide true
alignment with the clutch and the center
Do not strike the bolt after final
bore provides for installation of a clutch
t o r q u e has been applied.
pilot bearing.  The clutch driving ring is
bolted to the flywheel.
The hex head of the crankshaft bolt may
An oil seal ring,  which provides an oil
be used to bar, or turn, the crankshaft.
tight connection between the crankshaft
the barring operation should
However,
and the flywheel, is fitted into a groove
always be performed in a clockwise direc-
on the flywheel.
It is very important to make cer-
tion.
tain that the bolt has not been loosened
during the barring operation. Otherwise
serious engine damage may result if the
vibration damper or pulley is not secure-
ly fastened to the crankshaft.
FLYWHEEL
Description
(Figure 11B-103) is at-
The flywheel
tached to the rear end of the crankshaft
w i t h s i x s e l f l o c k i n g b o l t s .  Two dowels
Figure 11B-104. Pilot Bearing
in the end of the crankshaft aid flywheel
Retainer
alignment and provide support when the
11B-66


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