11
TROUBLE SHOOTING
When the hoist fails to operate after several attempts, or if there is any fault while
operating check the following:
Symptom
Possible Cause
Remedy
Hoist will not
operate
Cut circuit
Check battery lead
Weak battery
Recharge or replace battery(at least
650CCA)
Damaged circuit breaker
Replace circuit breaker
Bad connection of wirings
Reconnect tightly
Damaged solenoid
Replace solenoid
Cut circuit on switch
Replace switch
Damaged motor or worn carbon brush
Replace motor or carbon brush
Dropt or lost motor wiring
Tighten wirings
Motor runs in
one direction
Broken wiring or bad connection
Reconnect or replace wiring
Damaged or stuck solenoid
Replace solenoid
Switch inoperative
Replace switch
Dropt or lost wiring
Replace wiring and tighten wirings
Hoist won
’t lift
rated load
Considerable voltage drop exceeds by 10% of
the rated voltage of 12V DC or 24V DC
Correct leads size
Replace battery as bad condition
Clean and tighten the wirings
No brake
Damaged brake cam and disc
Replace brake cam and disc
Damaged gear box
Replace gear box
Dropt snatch ring
Replace snatch ring
Oil leakage at brake
Clean oil leakage
Damaged or inoperative spiral spring
Replace and position spiral spring
Brake distance
is too long
Worn or damaged brake
Replace or adjust brake
Oil leakage at brake
Clean oil leakage
Damaged gear
train
Hit by certain exterior force
Replace the damaged components
Damaged gear train
Replace the damaged components
Over load operation
Replace a new hoist
Motor
runs
extremely hot
Long period of operation
Allow to cool
Damaged motor
Replace or repair motor
Damaged or inoperative brake
Replace or repair brake
Hoist
vibrates
badly
or
is
noisy
Damaged brake
Replace or repair brake
Mounting surface is not flat
Make sure mounting surface is flat
Tie bar is bent
Replace tie bar
Crack on the motor and gearbox support racks
Replace racks