300598802_002_C0 - 10/2016 - © Leybold 29
Maintenance
5.6 Disassembly and Reassembly of the Electric Motor
Risk due to high voltages
Death or severe injury caused by an electric shock!
Before starting work, always disconnect the motor from the mains. Pull
the mains plug. Observe Safety Information 0.2.
Required tools:
Motor terminal box: Cross screwdriver 2#
Inside of terminal box: Terminal board, box wrench 7mm; Grounding, Cross
screwdriver 2#;
Motor connection: Open end wrench 13mm (D16/30T) / 10mm (D4/8T)
Stopper screw for coupling: Allen key 2.5mm, possibly a puller for the cou-
pling.
Disconnect the mains connection.
Support the motor.
Unscrew the screws (9/8).
Remove the electric motor (9/1).
Loosen the stopper screw (9/6) and pull the coupling (D16/30T coupling with
the blade wheel) (9/2) off the motor shaft using puller if necessary.
Clean all parts and check that they are in perfect condition; if not, replace them
with new parts.
Reassemble in the reverse order.
5.6.1 Checking the Coupling
Here the backlash between coupling cams and coupling element (9/4) must be
checked by a feeler gauge (see sketch 1).
When reaching the limit of wear of max. friction, the coupling element must be
exchanged immediately, independent of the inspection intervals.
The wear limit is at 3mm!
In addition a visual inspection as to the presence of any damage needs to be
done. If damaged, the coupling must be replaced.
1 Motor
2 Coupling
3 Stud
4 Coupling element
5 Supporting ring
6 Stopper screw
7 Washer
8 Nut
Fig. 9 Disassembly and reassembly of the electric motor
DANGER
Sketch 1 Checking the wear limit
Coupling
element
Feeler gauge
Cam 1
Cam 2
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