FLENDER REDUREX - Table 8-2 Possible Faults and Their Rectification

Possible faults and their rectification
The following table provides you with an overview of possible faults and indicates how they can
be rectified.
Table 8-2 Possible faults and their rectification
Possible faults Causes Possible remedies
Pressure monitor trig‐
gers an alarm
(For gear units with
pressure lubrication or
air‐oil cooler).
Oil pressure < 0.5 bar
● Check the oil level at room temperature
● Top up with oil if necessary
● Check the oil pump
● If required, replace the oil pump
● Check the oil filter and coarse filter
● If required, replace the oil filter or clean the coarse filter
Grease escaping at
the output shaft
Defective rotary shaft sealing rings
● Inspect the rotary shaft seals and replace if necessary
Noise Damage to gearing
● Contact Customer Services
● Inspect toothed components
● Replace damaged components if necessary
The bearing play is excessive.
● Contact Customer Services
● Adjust bearing play
Defective rolling-contact bearings
● Contact Customer Services
● 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, incor‐
rect transport position
● Check oil filling
● Clean the labyrinths
Main drive motor does
not start
Motor direction of rotation incorrect
● Change polarity of motor
Backstop cage with sprags incor‐
rectly installed or defective
● Contact Customer Services
● Install the backstop cage, rotated through 180° - or replace
Overrunning clutch blocked
● Contact Customer Services
● Replace the overrunning clutch
Overrunning clutch cage with
sprags incorrectly installed and/or
defective
● Contact Customer Services
● Install the overrunning clutch cage, rotated through 180° -
or replace
Main drive motor can
start while the auxiliary
drive is operational
Defective electrical interlocking be‐
tween the main and auxiliary motor
● Check the connections
● If necessary, replace defective devices
Defective speed monitoring
● Check the connections
● If necessary, replace defective devices
Maintenance
8.4 Possible faults
REDUREX Gear unit 5200en
100 Operating Instructions 03/2019