External Fan Made Of Plastic; External Fan Made Of Welded Sheet Steel; Figure 9-1 Ventilation (Schematic Diagram With Radial Fan) - Siemens SIMOTICS FD 1LL1 Operating Instructions Manual

Disassembly
1. Secure the fan cowl against falling before you start working.
2. Loosen the fixing screws that secure the fan cowl to the bearing shield.
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.
9.2.3.2

External fan made of plastic

External fans made of plastic feature a cast-on driver similar to a feather key. The external fan
is secured using a locking ring to prevent axial movement.
Disassembly
1. The external fan
2. Pull off the external fan by hand.
Assembly
1. Push the external fan
2. Insert the locking ring
9.2.3.3

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.
SIMOTICS FD 1LL1
Operating Instructions 01/2019
①
is fixed on the shaft with a locking ring
Pliers according to DIN 5254 should preferably be used for this purpose.
Figure 9-1 Ventilation (schematic diagram with radial fan)
①
up to the end stop on the shaft extension.
②
into the corresponding groove. Check its fit.
Maintenance
9.2 Corrective Maintenance
②
. Remove the locking ring.
125