15
TROUBLE
PROBABLE CAUSE
REMEDY
E
The hoist runs hot.
2d. HYDRAULIC Pump:
d1. Same as REMEDY D2.
d2. Prime mover low on horsepower or
RPM. Tune/adjust prime mover.
d3. Check suction line for damage.
d4. If pump is belt driven, belts are slip-
ping. Replace/tighten belts.
d5. Pump worn. Replace pump.
3. Disassemble hoist to inspect/replace
worn parts.
2d. Hydraulic pump not operating ef-
ficiently.
3. Excessively worn or damaged inter-
nal hoist parts.
F
Hoist “chatters” while raising rated
load.
1. Same PROBABLE CAUSE as D2.
2. Hydraulic oil flow to motor may be
too low.
3. Controls being operated too quickly.
1. Same as REMEDY for D2.
2. Same as REMEDY for E2.
3. Conduct operator training as re-
quired.
G
The wire rope does not spool smoothly
on the drum.
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
perpendicular 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 direc-
tion 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 ten-
dency 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.
1. Check mounting distance and fleet
angle. Reposition hoist as required.
2. Refer to “Hoist Installation.”
3. Consult wire rope manufacturer for
recommendation of wire rope that best
suits your application.
4. Replace wire rope and conduct op-
erator/rigger training as required.
