7. Lift the diaphragm slightly at the side.
8. Unscrew and remove the diaphragm from the connection rod by hand.
– The diaphragm has a right-hand thread.
– Pay attention to the spacer disks.
9.3.2 Cleaning and replacing the diaphragms and valves
Prerequisite
● Diaphragm and valves removed
Required spare parts
● Overhaul kit
Required consumables
● Clean, dry cloth
● Isopropanol
Procedure
1. Clean diaphragms and valves with a clean, dry cloth.
– Do not use isopropanol or other cleaning agents to clean diaphragms and valves.
2. Clean valve seats, intermediate plate and head cover with isopropanol.
3. Check valve seats, intermediate plate and head cover for wear.
4. Replace all wear parts according to the inspection sets.
9.3.3 Mount the diaphragm head and valves
Spacer disks
Spacer disks are available in 3 sizes:
● 13.0 × 6.4 × 0.5 mm
● 13.0 × 6.4 × 0.1 mm
● 16.0 × 6.4 × 0.05 mm
The number and size of the spacer disks vary between the diaphragm heads.
Install the same number and size of original spacer disks per diaphragm head.
Required tools
● Open-end wrench,
WAF 14
● Allen key,
WAF 4
Procedure
1. Rotate the diaphragm pump so that the diaphragm head to be mounted is facing upwards.
2. Screw the diaphragm into the connection rod by hand.
– The diaphragm has a right-hand thread.
– Pay attention to the spacer disks.
3. Place the valves and the sealing ring in the intermediate plate.
4. Position the intermediate plate.
5. Put on the diaphragm head cover.
– Observe the sealing ring on the intake side.
6. Screw the screws into the diaphragm head cover.
7. Mount the hose connection using the banjo bolts.
Maintenance
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