6. Appendix
-36- B1050-GB-0213
www.nord.com
6.5 Troubleshooting
Gear unit malfunctions
Malfunction
Possible cause
Remedy
Unusual running noises,
vibrations
Oil too low or
bearing damage or
toothed wheel damage
Consult NORD Service
Oil escaping from gear unit or
motor
Defective seal
Consult NORD Service
Oil escaping from
pressure vent
Incorrect oil level or
incorrect, contaminated oil or
unfavourable operating conditions
Oil change
Use oil expansion tank
(Option OA)
Gear unit becomes too hot
Unfavourable installation
conditions or gear unit damage
Consult NORD Service
Shock when switching on,
vibrations
Defective motor coupling or
loose gear unit mounting or
defective rubber element
Replace elastomer gear rim,
tighten motor and gear unit
fastening bolts, replace rubber
element
Drive shaft does not rotate
although motor is running
Fracture in gear unit or
defective motor coupling or
shrink disc slippage
Consult NORD Service
Pressure at the pressure
safeguard is too low
Pump is not delivering any oil or
leakage in the piping
Check the pump and the pipes
Attention!
Warning: shut down the gear unit immediately should any of the above faults occur!
