External Fan Made Of Welded Sheet Steel; Ventilation (Schematic Diagram With Radial Fan); Image - Siemens SIMOTICS FD 1LL1 Operating Instructions Manual

Maintenance
9.2 Corrective Maintenance
Disassembly
1. The external fan
2. Pull off the external fan by hand.
Assembly
1. Push the external fan
2. Insert the locking ring
9.2.2.3

External fan made of welded sheet steel

With external fans made of welded sheet steel, the fan hub is shrunk onto the shaft. The fan
is screwed to the hub.
Disassembling
1. Unscrew the air inlet nozzle.
2. Loosen the crews that fasten the fan impeller to the hub and pull the fan impeller off.
3. Warm up the fan hub, e.g. using a flame and pull the hot fan hub off with a puller.
126
①
is fixed on the shaft with a locking ring
Pliers according to DIN 5254 should preferably be used for this purpose.

Image 9-1

Ventilation (schematic diagram with radial fan)

Image 9-2

External fan made of welded sheet steel

①
up to the end stop on the shaft extension.
②
into the corresponding groove. Check its fit.
②
. Remove the locking ring.
SIMOTICS FD 1LL1
Operating Instructions 04/2016