7 Operation
and maintenance
ZIMM Screw Jack
32
Version 1.2
2015-01
Fault
Possible cause
Action
Geometry errors in the
system
Check the alignment:
– parallelism of the spindles to each other
– parallelism of the spindles to the guides
– angular alignment of the mating faces
(gearbox, nut, flange, etc.)
Load too high
Contact ZIMM (load, speed, duty cycle, etc.).
Operating
temperature too
high
Load or duty cycle too
high
Check the operating parameters,
ZIMM will be pleased to give advice.
Geometry errors in the
system
Check the alignment:
– parallelism of the spindles to each other
– parallelism of the spindles to the guides
– angular alignment of the mating faces
(gearbox, nut, flange, etc.)
Wrong spindle grease
1. Check the spindle grease,
ZIMM will be pleased to give advice (load, speed,
etc.).
2. Clean the spindle and regrease it.
Noise at the
coupling or
connecting shaft
Rubbing at the coupling
star
Grease the coupling star with Vaseline or plastic-
compatible grease.
Permissible offset
exceeded
Check the alignment and correct it as necessary.
Slight leakage at
the shaft sealing
ring
Slight leakage
Some slight leakage is normal and not a technical
problem.
Wipe off the leakage and keep monitoring it.
Heavy leakage
Shaft sealing ring
defective or excessive
pressure in the gearbox.
Contact ZIMM and send photos.
