15
TROUBLE
PROBABLE CAUSE
REMEDY
E
Th
e hoist runs hot.
d. HYDRAULIC Pump:
d1. Same as REMEDY D2.
d2. Prime mover low on horsepower or
R.P.M. 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.
d. Hydraulic pump not operating ef-
fi
ciently.
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
fl
ow 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
Th
e wire rope does not spool smoothly
on the drum.
1.
Th
e hoist may be mounted too close
to the main sheave, causing the
fl
eet
angle to be more than 1-1/2 degrees.
2.
Th
e 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.
Th
ere is a distinct advantage
in applying rope of the proper direc-
tion of lay. When the load is slacked
o
ff
, 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.
Th
en, when
winding is resumed, the rope has a ten-
dency to crisscross and overlap on the
drum.
Th
e result is apt to be a
fl
attened
and crushed rope.
4.
Th
e hoist may have been overloaded,
causing permanent set in the wire rope.
1. Check mounting distance and
fl
eet
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.
