
9.3.1.2
Screw lock washers
Nuts or bolts that are mounted together with locking, resilient and/or force-distributing elements
(e.g., safety plates, spring-lock washers, etc.) must be refitted together with identical, fully
functional elements.
Locking and sealing elements must always be replaced!
9.3.2
Fan cowl
To remove or replace the external fan, the fan cowl must be disassembled. The fan cowl is fixed
on the machine enclosure with screws.
Disassembly
1. Secure the fan cowl against falling before you start working.
2. Loosen the fixing screws that secure the fan cowl on the enclosure.
3. Observe existing retaining components and retain them for the reassembly.
Assembly
Proceed in the reverse order to assemble the fan cowl.
1. Position the fan cowl and tighten the fixing screws.
2. Ensure that the retaining components are undamaged and correctly installed.
9.3.3
External fan made of metal
External metal fans have a keyway connection and are prevented from axially shifting using a
locking ring.
Disassembly
1. The external fan
①
is fixed on the shaft with a locking ring
②
. Remove the locking ring.
Pliers according to DIN 5254 should preferably be used for this purpose.
2. Use a suitable device to pull off the external fan.
Maintenance
9.3 Corrective maintenance
1MB5 SH 400/450
Operating Instructions, 05/2019, A5E45959221A
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