MAINTENANCE
Series 292
18/31
Edition 2015-05-18
603585EA
6.3.1
Preparatory steps
1. Detach the soft-pump valve from the main valve by removing the 2 screws (6).
2. Remove O-rings (7) and (9) and discard them. The item number in brackets refers to
«Figure 6-3».
Figure 6-3
6.3.2
Replacement of vacuum seals – soft-pump valve
The following item numbers in brackets refer to «Figure 6-2» on page 17.
1. Remove 4 screws (59) uniformly and crosswise.
Attention: Loaded spring!
2. Withdraw "actuator/plate assembly" carefully from valve body.
3. Remove bonnet seal (O-ring, 64) from groove and discard it.
4. Pull plate seal (O-ring, 63) out of groove by picking it with a needle and discard it.
Do not damage the sealing surface!
5. Remove setscrew (4) and clean it with alcohol.
6. Remove circlip (5) and take out the setting piece (3) by pushing it from the vacuum side.
7. Remove O-rings (8, 10) and discard them.
8. Make sure that all sealing surfaces are undamaged and clean them with alcohol.
