Harrington Hoists and Cranes LB Lever Hoist - (L5) - Manual (Page 47)

47
Table 7-1 Troubleshooting Guide
Symptom Cause Remedy
Hoist will not lift –
Lever will not operate
Gear #2 improperly timed
Reassemble gears properly and ensure
smooth operation before reuse.

Ensure the „0‟ marks of
gear #2 are aligned properly, as shown.
Pinion Gear #2
'0' Mark
Hoist with Slip Clutch
Hoist will not lift –
Lever will operate but
load will not move.
Slip Clutch activated. Reduce load to less than rated capacity.
Hoist with Slip Clutch
Hoist will not lift under
rated capacity.
Slip Clutch malfunction. Due to frequently
operating hoist with greater than rated load.
Replace friction clutch.
Do not frequently operate hoist with greater
than rated load.
Hoist will lift
intermittently
–
Slight or irregular
clicking
Poor pawl movement caused by faulty pawl
spring. The spring is loose or damaged.
Perform maintenance and/or repair.
Mis-assembly of pawl spring
Reassemble it properly and ensure to check
click sound of the pawl before reuse.
During operation, hoist
idles or load drifts
Poor contact of load sheave and load chain
caused by improper chain-reeving (see
picture)
Frame A
Chain guide
To bottom
hook
Load sheave
Chain stopper link
Load chain
Reassemble properly and ensure proper
lifting before reuse.
To bottom
hook
Chain guide
Load sheave
Chain stopper link
Hoist will not lift without
load
Mis-assembly of brake spring
Insufficient angle to set the spring will cause
a poor braking.
Brake spring
Slot for spring
Back of free chain
knob assembly Slot for cam guide
Reassemble properly.

Turn the free chain
knob 120° clockwise and set the brake
spring.