Servicing
8.4 Possible faults
92 Edition 06/2022 A5850-02en
Information
Loss of warranty
You will invalidate the warranty for the gear unit if you modify it in any way without seeking
the approval of Flender beforehand, or if you do not use original spare parts.
Only use original spare parts from Flender. Always arrange for Flender Customer Services
to repair any faults that develop while the unit is still under warranty.
Possible faults and how to rectify them
The following table provides an overview of the possible faults and how to rectify them.
Possible faults Causes Possible remedies
Noise Damage to the gear teeth • Contact Customer Service
• Inspect toothed components
• If necessary, replace damaged components
The bearing play is excessive. • Contact Customer Service
• Adjust bearing play
Defective rolling-contact bearings • Contact Customer Service
• Replace defective rolling-contact bearings
Gear unit fastening has worked
loose
• Tighten bolts and nuts to the specified tightening torque
• Replace damaged bolts and nuts
Outer surface of gear
unit soiled with oil
Inadequate sealing of the housing
cover or joints
• Seal housing cover or joints
Labyrinth seals soiled with oil, in-
correct transport position
• Check oil filling
• Clean labyrinth seals
Oil is foaming in the
gear unit
Preservation agent not completely
drained off
• Change the oil
Oil supply system left in operation
for too long at low temperatures
• Switch off the oil supply system
• Degas the oil
Gear unit too cold during operation • Shut down the gear unit
• Degas the oil
• Start up without cooling water during cold restart
Water in the oil • Take test tube sample to examine oil condition for water
penetration
• Have the oil examined by a chemical lab
• Change the oil if necessary
Oil defoamer has run out • Examine the oil
• Change the oil if necessary
Unsuitable mixture of oils • Examine the oil
• Change the oil if necessary
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