Figure 3-29. Trip cable adjustment.
was available, be sure and get
NOTE
assistance from another crane or
When replacing keeper plates, the lip
hoisting device to lift boom tip above
of front hook roller keeper plate must
the horizontal before using boom
be between flange of eccentric shaft
hoist to position boom. Booms have
and hook roller mounting bracket.
been known to collapse under stress
The lip of rear hook roller keeper
applied by boom hoist clutch when
plate must be on outside of the
boom tip was lower than boom foot
eccentric shaft.
3-36. Propel Chain Adjustment
CAUTION
a.
General. To properly adjust the propel chain,
If boom tip had been lowered to rest
the crane-shovel should be propelled backward for at
on the ground because no cribbing
least the length of the crawler frame.
3-38
