7.4.1 Dismantle the pump head and valves
Avoid interchanging components
Always dismantle and mount only the pump head on one pump side in order to avoid inter-
changing the components.
The procedures are identical for both pump heads.
Prerequisites
● Handle dismantled
● Diaphragm pump supported
Required tools
● Open-end wrench,
WAF 15
● Open-end wrench,
WAF 16
● Allen key,
WAF 4
2
1
3
4
5
6
8
7
Fig. 7:
Pump head and valves
1 Housing cover 1
5
Head cover (2×)
2 Cylinder screw (6×)
6
Sealing ring (2×)
3 Lock washer (6×)
7
Banjo bolt (2×)
4 Valve (4×)
8
Hose connection
Procedure
1. Loosen the screw fitting.
2. Turn the elbow fitting max. 1/4 revolution anti-clockwise, until the hose connection can be loos-
ened.
3. Loosen the screw fitting.
4. Dismantle the hose connection.
5. Unscrew the cylinder screws on the housing cover.
6. Remove the housing cover.
7. Remove the head cover each with both valves.
– If the valves stick to the housing cover, carefully release the valves; otherwise, remove the
valves from the head covers.
Maintenance
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