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7 Servicing/Maintenance
▪ Only remove the protective wrapping of the contact faces immediately before
installation takes place.
▪ Prevent any damage to the sealing surfaces or O-rings.
✓
The notes and steps stated in (⇨ Section 7.5.1 Page 41) have been observed/
carried out.
✓
The bearing assembly as well as the individual parts have been placed in a clean
and level assembly area.
✓
All dismantled parts have been cleaned and checked for wear.
✓
Any damaged or worn parts have been replaced by original spare parts.
✓
The sealing surfaces have been cleaned.
1.
Clean shaft sleeve 523, and touch up any score marks or scratches with a
polishing cloth, if necessary.
If score marks or scratches are still visible, fit new shaft sleeve 523.
2.
Slide shaft sleeve 523 with new gasket 400.75 onto shaft 210.
3.
Clean the mating ring location in casing cover 161.
CAUTION
Elastomers in contact with oil/grease
Shaft seal failure!
▷ Use water as assembly lubricant.
▷ Never use oil or grease as assembly lubricant.
4.
Carefully insert the mating ring. Make sure to apply pressure evenly.
5.
On variants with a bolted casing cover undo forcing screws 901.31 without
removing them.
6.
Place casing cover 161 into the locating fit of drive lantern 341.
7.
Fit and tighten hexagon nuts 920.01 and/or 920.15, if any.
NOTE
To reduce friction forces when assembling the seal, wet the shaft sleeve and the
location of the stationary ring with water.
8.
Fit the rotating assembly of the mechanical seal (primary ring) on shaft sleeve
523.
Observe the following installation dimension b for mechanical seals with installation
length L
to EN 12756 (design KU):
1k
b
1
2
Fig. 8: Installation dimension b of mechanical seal
1
Impeller
3
Mechanical seal
Table 15: Installation dimensions of the mechanical seal
Shaft unit
25
35
55
Normblock
3
4
2
Shaft sleeve
4
Casing cover
4)
Installation dimension b
7.5 mm
10 mm
15 mm
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