Siemens H-compact PLUS, Operating Instructions Manual

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Maintenance
9.2 Corrective Maintenance
WOGeneric TEAAC / 2008
Siemens AG Operating Instructions 1.03 1RQ671...-Z
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Fit the fan cowl
The fan cowl is made of sheet steel and welded together.
● When installing a fan cowl, make sure that the fastening parts such as the rubber bush
and thrust pad are intact and installed correctly. Also see the "Ventilation" section in the
spare parts list.
● In the case of unidirectional fans, also check the distance between the fan impeller and
the air guide nozzle (≥ 2mm).
9.2.5 Reparing rolling-contact bearings
Installing rolling-contact bearings
1. Before installing the bearing, place the parts to be attached to the shaft inside the
bearing.
2. Extreme caution and attention to cleanliness are vital to installation.
3. To install the rolling-contact bearing, warm it up using oil or air heated to around 80°C
4. Push the rolling-contact bearing onto the shaft. Avoid any heavy blows that might
damage the bearing.
5. Fill the bearing to the top with the specified lubricating grease.
6. After cooling the bearing down, ensure that it is resting against the shaft shoulder.
Otherwise, axial vibrations may occur. Use a feeler gauge to check this.
9.2.6 Repairing the rolling contact bearings with labyrinth ring
Dismounting
Apply a protective coating to the shaft in front of and underneath the labyrinth ring to prevent
corrosion; the three locating setscrews are secured with adhesive (e.g. Loctite 243).
Figure 9-1 Dismantling the labyrinth ring
● Mark the components of the bearing units so that they can be assembled correctly.
● Remove the protective coating from the shaft in front of the Iabyrinth ring.