MAINTENANCE
Series 091
18/27
Edition 19.05.2021
1088779EA
8.
Clean gate sealing surfaces (1) (seat side) and other surfaces inside valve body; see «Figure
7-3».
1
Sealing surface
Figure 7-3
9.
Clean or replace the gate O-ring (13); see «Figure 7-5» on page 19, use O-ring removal tool.
VAT recommends that whenever the gate O-ring is changed to also change the
gliders (Peek-tabs) on both sides of the gate; see item 11 and 12.
10. Continue with step 13 when the gliders are not replaced.
11. Remove gliders from the front and backside of the gate with a small, edge shaped tool e.g.
screwdriver. Squeeze tool into gap between glider and gate (a); see «Figure 7-4». Push down
the tool (b) to release glider from pocket and remove glider (c).
1
Glider
2
Gate
3
Gap between
glider and gate
Figure 7-4
12. Mount the gliders (1) by gently pushing the gliders in the designated pockets in the gate.
1
3
1
2
a
b
c
