5.5.3 Dismantling
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 removing
the gear unit using hydraulic pulling equipment, excessive force can be placed on the housing,
bearings and other gear unit components. Always check the hollow shaft bearings for damage
before reattaching the gear unit to the machine shaft.
Note
Reducing the risk of corrosion
When using jacking screws or screw spindles, to avoid the risk of corrosion, round o and grease
the end of the thread (head) that presses against the driven machine.
Procedure
To remove the shaft-mounted gear unit with hollow shaft from the machine shaft, proceed as
follows:
1. Remove the axial locking element from the hollow shaft.
2. 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.
3. To do this, rst remove the end plate and locking ring.
4. Wait for the rust remover to work and then use a xture to dismantle the gear unit.
5. Depending on the conditions on site, you can use one of the following methods to remove
the gear unit from the machine shaft:
– With jacking screws in an end plate
– With a central screw spindle
– Using hydraulic pulling equipment
Assembly
5.5 Shaft-mounted gear unit with hollow shaft and spline according to DIN 5480
Assembly and operating instructions A5051en
Edition 06/2020 79
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