3
Diaphragm support disk
4
Connection rod
Replacing the diaphragm
Tools required
● Diaphragm key (accessory)
● Torque wrench (hex, size 6)
Consumables required
● Gasoline or petroleum
1.
Diaphragm with square hole
: Remove the pre-punched interior of the new diaphragm.
2. Carefully lift the side of the diaphragm.
3. Using the diaphragm key, reach under the diaphragm and grasp the diaphragm support disk.
4. Disconnect the diaphragm support disk using the diaphragm key.
5. Unscrew the diaphragm support disk together with the diaphragm and diaphragm clamping disk.
6. If necessary, disconnect the old diaphragm from the diaphragm support disk using gasoline or pe-
troleum.
7. Insert the new diaphragm between diaphragm clamping disk and diaphragm support disk.
– When doing so, make sure that the square connecting bolt of the diaphragm clamping disk is
positioned correctly in the diaphragm support disk guide.
8. Lift the side of the diaphragm and insert it carefully in the diaphragm key with the diaphragm
clamping disk and diaphragm support disk.
– When doing so, do not kink the diaphragm excessively.
9. Bolt all parts together with the spacer disks and connection rod.
10. Attach the torque wrench to the diaphragm key
11. Tighten the screw fitting with the torque wrench.
– Tightening torque =
6 Nm
9.8 Replacing the valves
The valves are located in the diaphragm heads and below the pressure side distributor cover plate.
1
2
Fig. 14:
Correct positioning of valves in diaphragm head
1
Outlet side with round central opening below valve
2
Inlet side with kidney-shaped opening next to valve
The valve crosspiece lies opposite the kidney-shaped opening.
Maintenance
26/40
