Troubleshooting Chart - Bradbury Equipment H4441 Operation & Maintenance Instructions Manual

9
TROUBLE SHOOTING CHART
In case of breakdown check the following points:
1. Electricity cut
2. Main fuses
3. Motor starter
4. Electric motor
5. Cable fracture
6. Obstruction under lift
If these points are found in order but the lift is still not working, the safety system has probably been activated, and
the lift must not be started or repaired by unqualified staff. Contact the nearest authorized service shop.
Do not start repairing the lift until the main switch has been cut off.
Do not disconnect the safety system and do not operate the lift after breakdown and prior to repair.
SYMPTOM
A. Platforms no longer
horizontal when
hanging in cables
under load (approx.
1000 kg, 2200 lbs)
B. Platforms no longer
horizontal when res-
ting on the ratchets
C. Activation of control
to lower lift from
topmost position
does not release
ratchets
D. Ratchets are not
released regardless
of parking height
E. Ratchets fail to
activate
F. Oil leakage
CAUSE
One or several cables
stretched
Incorrect adjustment
One or more of the
cables have stretched
Air source failure
Incorrect air pressure
Platforms are not lifted
free from ratchet rails
One ratchet binding
Defective solenoid
valve
Air system blocked
High pressure hose
defective
Leaks at fittings
Cylinder seals
defective
REMEDY
Adjust cables (see page 6)
Adjust platforms and cross beams until they are horizontal.
Slacken nut under top plate for rail. Raise or lower ratchet
rails as required by means of adjustment bolts in top of
posts. After adjustment tighten lock nut under top plate for
rail. Ratchet rails should preferably be adjusted to lowest
possible position.
Adjust cables (see page 6).
Cure fault
Cure fault (min. 7 bar - max. 10 bar)
Raise lift a little and lower.
Let an assistant operate UP-button so that lift ascends in
small jerks. Meanwhile pull ratchet free manually. Use pliers
or grips.
Replace solenoid valve
Strip and clean air system
Replace hose
Tighten
Replace or renovate cylinder
T61720