BRADEN PD12C Series Installation Maintenance And Service Manual page 15

TROUBLE
E
The hoist runs hot.
F
Hoist "chatters" while raising rated
load.
G
The wire rope does not spool
smoothly on the drum.
PROBABLE CAUSE
D. Hydraulic pump not operating
effi ciently.
3. Excessively worn or damaged
internal hoist parts.
1. Same as D2.
2. Hydraulic oil fl ow to motor may
be too low.
3. Controls being operated too
quickly.
1. The hoist may be mounted too
close to the main sheave, caus-
ing the fl eet angle to be more than
1-1/2 degrees.
2. The hoist may not be mounted
perpendicular to an imaginary line
between the center of the cable
drum and the fi rst sheave.
3. Could possibly be using the
wrong lay rope. There is a distinct
advantage in applying rope of the
proper direction of lay. When the
load is slacked off, the several coils
on the drum will stay closer to-
gether 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 criss-cross and overlap
on the drum. The result is apt to be
a fl attened and crushed rope.
4. The hoist may have been over-
loaded, causing permanent set in
the wire rope.
15
REMEDY
Same as remedies for Trouble D2.
Prime mover low on horsepower or
R.P.M. Tune/adjust prime mover.
Check suction line for damage.
If pump is belt driven, belts are slip-
ping. Replace/tighten belts.
Pump worn. Replace pump.
Disassemble hoist to inspect/re-
place worn parts.
Same as remedies for Trouble D2.
Same as remedies for Trouble E2.
Conduct operator training as re-
quired.
Check mounting distance and fl eet
angle. Reposition hoist as required.
Refer to "Hoist Installation".
Consult wire rope manufacturer for
recommendation of wire rope that
best suits your application.
Replace wire rope and conduct
operator/rigger training as required.