Assembly
5.3 Gear unit assembly
66 Edition 06/2022 A5850-02en
5.3.6.3 Dismantling5.3 Gear unit assembly
Measures prior to dismantling
NOTICE
Damage to the gear unit
The gear unit can become damaged if it skews during dismantling.
Do not allow the gear unit to skew as you remove it from the machine shaft. When remov-
ing the gear unit using hydraulic pulling equipment, excessive force can be placed on the
housing, rolling-contact bearings and other gear unit components. Always check the hollow
shaft bearings for damage before reattaching the gear unit to the machine shaft.
Information
Reducing the risk of seizure
When using jacking screws or screw spindles, round off and grease the end of the thread
(head) that presses against the driven machine to avoid the risk of seizure.
Procedure
To remove the shaft-mounted gear unit with hollow shaft and shrink disk from the machine
shaft, proceed as follows:
1. Secure the gear unit in position.
2. Remove the shrink disk.
3. If fretting corrosion has formed on the seat surfaces, rust remover must be applied so
that the gear unit can be more easily detached. The rust remover can be pumped in
through the pressure oil connector.
4. To do this, first remove the end plate and locking ring.
5. Wait for the rust remover to work and then use a fixture to dismantle the gear unit.
6. Depending on the conditions on site, you can use one of the following methods to re-
move the gear unit from the machine shaft:
– With jacking screws in an end plate
– With a central screw spindle
– Using hydraulic pulling equipment
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