BRADEN CH280 Installation Maintenance And Service Manual page 19

TROUBLE
F
Hoist chatters while raising rated
load.
G
The wire rope does not spool
smoothly on the drum.
PROBABLE CAUSE
1. Same as D2.
2. Hydraulic oil flow to motor may be
too low.
3. Controls being operated too quick-
ly.
1. The hoist may be mounted too
close to the main sheave, causing
the fleet angle to be more than 1.5
degrees.
2. The hoist may not be mounted per-
pendicular to an imaginary line be-
tween the center of the cable drum
and the first sheave.
3. Could possibly be using the wrong
lay rope. There is a distinct advan-
tage in applying rope of the proper
direction of lay. When the load is
slacked off, the several coils on the
drum will stay closer together and
maintain an even layer. If rope of
improper lay is used, the coils will
spread apart each time the load is
removed. Then, when winding is
resumed, the rope has a tendency
to crisscross and overlap on the
drum. The result is apt to be a flat-
tened and crushed rope.
4. The hoist may have been over-
loaded, causing permanent set in
the wire rope.
19
REMEDY
Same as remedies for Trouble D2.
Same as remedies for Trouble E2.
Conduct operator training as re-
quired.
Check mounting distance and fleet
angle. Reposition hoist as required.
Refer to Hoist Installation section of
manual.
Consult wire rope manufacturer for
recommendation of wire rope that
best suits your application.
Replace wire rope and conduct op-
erator/rigger training as required.