24
09
Troubleshooting
Operator’s Manual 1808 022016 ENG
SYMPTOM PROBABLE CAUSE REMEDIES
Output shaft does not
rotate, even though the
motor is running or the
input shaft is rotating
Drive between shafts
interrupted in the gear
unit
Return the gear unit/geared motor for repair.
Unusual, regular running
noise
A meshing or grinding
sound: damage to
bearings
Check oil.
A knocking sound:
irregularity in the
gearing
Unusual, irregular
running noise
Foreign matter present
in the oil
Stop the unit. Check the oil.
Oil leaking from the gear
unit or from the output
end oil seal
Defective gasket on
gear unit cover
etighten screws on gear unit cover and observe gear
unit. ent the gear unit.
ear unit not ventilated
Oil leaking from the
ventilator
ear unit overfi lled
with oil
orrect the oil level.
Gear unit installed in
an incorrect mounting
position
Fit the ventilator in the correct position and check oil
level.
Frequent cold starts
(oil foaming) and/or
high oil level.
Table 9-2 – Troubleshooting the Gear Drive
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