Nord Drivesystems SK 7407 - Table 22: Overview of Malfunctions

7 Appendix
B 1050 en-1819 105
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Gear unit malfunctions
Fault Possible cause Remedy
Unusual running noises,
Vibrations
Oil level too low
Correct oil level
Bearing damage
Consult NORD Service
Gear wheel damage
Consult NORD Service
Oil leaks from the geared
motor
Defective seal
Consult NORD Service
Oil escaping from
pressure vent
Oil level too high
Correct oil level
Unfavourable operating conditions
Consult NORD Service
Gear unit becomes too
hot
Incorrect oil in the gear unit
Check oil
Incorrect oil
level
Correct oil level
Dirty oil
Replace oil and filter
Cooling system dirty
Clean cooling system
Gear unit dirty
Clean gear unit
Cooling defective
Consult NORD Service
Gear unit overloaded
Consult NORD Service
Impermissible axial or radial forces
Consult NORD Service
Unfavourable installation situation
Consult NORD Service
Gear unit damage
Consult NORD Service
Shock when switching on
Motor coupling defective
Replace coupling
Motor coupling worn
Replace elastomer ring
Gear unit fastening loose
Check gear unit and motor fastening
Rubber element worn
Replace rubber element
Output shaft does not
rotate although motor is
running
Motor coupling defective
Replace coupling
Shrink disc slip
Check shrink disc
Breakage in gear unit
Consult NORD Service
Cooling system failure
Cooling system defective
Observe the separate operating manual
Pressure at the pressure
safeguard is too low
Pump does not deliver oil
Check pump and replace
as necessary
Leakage
Check piping and replace as necessary
Table 22: Overview of malfunctions
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