BRADEN CH400B Installation Maintenance And Service Manual page 16

TROUBLE
E
The hoist runs hot.
F
Hoist chatters while rais-
ing rated load.
G
The wire rope does not
spool smoothly on the
drum.
PROBABLE CAUSE
1. Same as D1.
2. Be certain that the hydraulic system
temperature is not more than 180°F
(82°C). Excessive hydraulic oil tem-
peratures may be caused by:
A. Plugged heat exchanger.
B. Too low or too high oil level in hydraulic
reservoir.
C. Same as D2.
D. Hydraulic pump not operating efficient-
ly.
3. Excessively worn or damaged internal
hoist parts.
1. Same as D2.
2. Hydraulic oil flow to motor may be too
low.
3. Controls being operated too quickly.
1. The hoist may be mounted too close
to the main sheave, causing the fleet
angle to be more than 1-1/2 degrees.
2. The hoist may not be mounted perpen-
dicular to an imaginary line between
the center of the cable drum and the
first 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 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 criss-cross and overlap on the drum.
The result is apt to be a flattened and
crushed rope.
4. The hoist may have been overloaded,
causing permanent set in the wire
rope.
Same as remedies for Trouble D1.
Thoroughly clean exterior and flush interior.
Fill/drain to proper level.
Same as remedies for Trouble D2.
Prime mover low on horsepower or RPM
Tune/adjust prime mover.
Check suction line for damage.
If pump is belt driven, belts are slipping. Re-
place/tighten belts.
Pump worn. Replace pump.
Disassemble hoist to inspect/replace worn
parts.
Same as remedies for Trouble D2.
Same as remedies for Trouble E2.
Conduct operator training as required.
Check mounting distance and fleet angle.
Reposition hoist as required.
Refer to "Hoist Installation."
Consult wire rope manufacturer for recom-
mendation of wire rope that best suits your
application.
Replace wire rope and conduct operator/
rigger training as required.
16
REMEDY