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
In order to dismantle a shaft-mounted gear unit 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. Wait for the rust remover to work and then use a xture to dismantle the gear unit.
4. 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
The following diagram shows the dismantling procedure using an end plate for gear units with
a hollow shaft and parallel keyway:
① Jacking screws ④ Machine shaft
② Bolts ⑤ Hollow shaft
③ Parallel key ⑥ End plate for pressing out
Figure 5-7 Dismantling using an end plate
Assembly
5.4 Shaft-mounted gear unit with hollow shaft and parallel keyway
Assembly and operating instructions A5051en
Edition 06/2020 73
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