8
9
Problem
Symptom
Possible Cause
Remedy
c. Hoist stalls when lifting
heavy vehicle.
1.Vehicle too heavy.
a. Max. capacity 3000kg.
2. Thermal overload setting
too low.
a. Check setting of overload. Should be 9 amps.
3. Inadequate lubrication of
screw.
a. Oil screws and nuts.
4. Mechanical noise
from:
Carriage
a. Carriage rattles during
travel under no load
condition.
1. Failed bearing in roller giving
rise to excessive clearance.
a. Check each of 4 rollers in the carriage for excess play.
Dismantle column and replace if required.
2. Carriage is bent or
misaligned due to external
damage.
a. Visual check of carriage for damage.
b. Carriage should not be repaired except by Tecalemit
factory. Replace carriage if necessary.
3. Screw is bent causing
carriage to oscillate.
a. This condition will not impair the function of the hoist
unless the screw misalignment is such that it fouls the
load bar and damages the thread.
b. Carriage grates or runs
roughly under load.
1. Failed bearing in a roller
causing rough running.
a. Check each of 4 rollers in the carriage for excess play.
Dismantle column and replace if required.
2. Damaged screw binding on
nuts.
a. Inspect condition of screw and replace screw and nuts.
Drive pulley
a. Clattering sound coming
from drive cover.
1. Grub screw retaining motor
pulley is loose, allowing play.
a. Tighten grub screw using Allen key.
Base frame
a. Chain noise.
1. Chain not running on guides.
a. Set chain to run correctly on the guides and re-tension.
b. Clicking sound.
1. Chain is damaged.
a. Check chain for kinking or seized links.
2. Sprocket is loose.
a. Inspect sprocket (refer Major Service’).
3. Bottom bearing damaged.
a. Inspect bearing (refer ‘Major Service’).
5. Excessive deflection
of column under load.
1.Anchor bolts to floor are
loose.
a. Tighten anchor bolts.
2. Bolts securing column to
base frame are loose.
a. Tighten base plate bolts.
3. Insufficient support under
base frame.
a. Base frame should be fully supported between
columns, either by the floor or by packing shims. Refer
Installation.
6. Rapid wear on nut.
1. Inadequate or wrong type of
oil used.
a. Refill oil reservoirs with the correct extreme preesure
oil.
7. Hoist does not stop.
1. Switch mechanism spring
return is jammed.
a. Remove red switch handle. Check for oil, grease, dirt
deposits or metal splinters. Clean thoroughly, and refit.
2. Contactor is stuck down.
a. Replace contactor.
3.Too much Iubrication.
a Dry lift screws. Change oil to recommended oil with no
additives. Fill to the correct level.
b. Check adjustment of brush on safety nut.
4. Lift nuts faulty.
a. Replace lift nuts.
Fault Diagnosis
continued
