Maintenance
23
5.7 Cleaning the Valve of the
Pressure Balance Line
Observe all safety information provided in
Section 5.1.
Remove the screws and take off the cover
(12/1)
with
O-ring (12/2).
Take out the spring (12/4).
Remove the valve disk (12/6) with O-rings (12/5) and
(12/7).
If the bushing (12/3) is damaged, pull it out of the valve
disk and replace it.
Clean all parts or replace them if necessary.
Reassemble in the reverse sequence. When doing so,
check the O-rings for leak-tightness and replace if found
faulty. Finally a leak test should be run.
5.8 Exchanging the Shaft
Seals
Observe all safety information provided in
Section 5.1.
The shaft feedthrough of the RUVAC WA/WAU is sealed
with two shaft seals. In order to reduce wear on the shaft
these shaft seals run on a bushing.
A dropping oil level in the oiler (10/1) is a sign for
malfunctioning shaft seals.
When the oil level in the oiler drops and when no oil
appears under the shaft seal housing, it is likely that the
inner shaft seal is faulty. In this case the oil flows from the
shaft seal housing into the bearing spaces of the pump
thereby creating in the bearing spaces an unacceptably
high oil level. In such a case the pump must be switched
off immediately and it must be repaired.
When the oil level in the oiler drops and when oil appears
under the shaft seal housing, it is likely that the outer
Warning
Key to Fig. 12
1 Cover
2 O-ring
3 Bushing
4 Spring
5 O-ring
6 Valve disc
7 O-ring
Fig. 12 Valve of the pressure balance line
1
2
3
4
5
6
7