Gear units – Manual with installation instructions
72 B 1000 en-3921
7.4 Troubleshooting
Gear unit damage
• Shut down the gear unit immediately in case of malfunction.
Gear unit malfunctions
Error Possible cause Remedy
Unusual running noises,
vibrations
bearing damage or
gear wheel damage
Consult NORD Service department
gear unit or motor
Defective seal Consult NORD Service department
Oil escaping from
pressure vent
Incorrect oil level
Use oil expansion chamber
(Option OA)
Unfavourable operating conditions
Consult NORD Service department
Gear unit becomes too hot
Unfavourable installation conditions
or gear unit damage
Consult NORD Service department
Shock when switching on,
vibrations
Motor coupling defective Replace elastomer ring
Gear unit fastening loose
Tighten motor and gear unit
fastening screws
Defective rubber element Replace rubber element
Output shaft does not rotate
although motor is running
Consult NORD Service department
Table 14: Overview of malfunctions