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.
9.2.5 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.
3. Avoid using a hammer.
4. Secure the parallel key from falling out or remove it.
Figure 9-1 Ventilation (schematic diagram with axial fan)
Assembly
1. Remove the parallel key lock or insert it in the keyway.
2. Check the correct seating.
Maintenance
9.2 Corrective Maintenance
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 08/2017 119