Harrington Hoists and Cranes LB Lever Hoist - (L5) - Manual (Page 49)

49
Table 7-1 Troubleshooting Guide
Symptom Cause Remedy
Mis-assembly of friction plates, i.e. friction
plates missing or at one side as shown.
Reassemble properly as shown and ensure
hoist functions properly before reuse.
Cracked friction plate caused by overload
Replace the friction plate and use the hoist
properly within rated capacity.
Friction plate wear caused by very frequent
and long term use.
Perform hoist maintenance.
Load drifts or slips
when lowering,
continued
Mis-assembly of female thread and cam
guide Reassemble Female Thread and Cam
Guide properly.
Attaching cam guide without tightening
female thread may cause an un-tightened
brake. 
Secure the female
thread firmly before attaching cam guide.
Free chain knob does
not move in and out
Damaged or deformed friction plate Perform hoist maintenance.
Hoist will not free
wheel
Load chain pulled to hard and brake
engaged
Pull the load chain with less force
Mis-assembly of free chain spring
Chain Spring twisted at excessive angle
See the symptom of “Hoist will not lift without
load. ”
Load drifts or slips
when selector lever is
set in free chain mode
Mis-assembly of free chain spring
Poorly tightened brake caused by insufficient
twist angle.
See the symptom of “Hoist will not lift without
load. ”
Mid of female
thread's jog
Mid of cam guide's jog
Some more right
from mid of female
thread jog
Jog of female thread
Jog of cam guide
To female thread