TM 5-3895-383-24
Checking Bore Runout Of The Flywheel
(Typical Example)
(1) 7H1945 Holding Rod. (2) 7H1645 Holding Rod. (3)
7H1942 Indicator. (4) 7H1940 Universal Attachment.
Checking Flywheel Clutch Pilot Bearing Bore
Vibration Damper
Damage to or failure of the damper will increase vibrations and
result in damage of the crankshaft.
Rubber Damper (If Equipped)
Rubber Vibration Assembly
(1) Crankshaft. (2) Hub. (3) Rubber. (4) Ring. (5) Alignment
marks. If the damper is damaged, or if the bolt holes in the
damper are loose fitting, replace the damper. Replacement of
the damper is also needed at the time of a crankshaft failure
due to torsional forces.
The vibration damper has alignment marks on the hub and the
ring. These marks give an indication of the condition of the
vibration damper. If the marks are not in alignment, the rubber
part (between the ring and the hub) of the vibration damper
has had a separation from the ring and/or hub. If the marks
are not in alignment, install a new vibration damper.
A used vibration damper can have a visual wobble (movement
to the front and then to the rear when in rotation) on the outer
ring and still not need replacement, because some wobble of
the outer ring is normal. To see if the amount of wobble is
acceptable, or replacement is necessary, check the damper
with the procedure that follows:
1.
Install a dial indicator, contact point and other parts
necessary to hold the dial indicator stationary. The
contact point must be perpendicular (at a 90 degree
angle) to the face of the outer ring of the damper, and
must make contact approximately at the center of the
outer ring.
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