5. Move the connection rod by rotating the eccentric bushing (on the front of the connection rod) to a
position where the diaphragm rests centrally and flush on the supporting surface in the housing
opening.
9.5 Checking and replacing parts
Checking and replacing parts
1. Check all parts for damage and contamination.
2. Clean contaminated parts.
3. Replace damaged valves.
4. Replace damaged diaphragms.
9.6 Cleaning contaminated parts
NOTICE
Damage caused by unsuitable cleaning agents
Unsuitable cleaning agents damage pump parts.
► Use only approved cleaning agents to clean pump parts.
► Never use soluble detergents.
Cleaning contaminated parts
Consumables required
● Industrial alcohol
1. Clean contaminated parts with industrial alcohol.
2. Allow parts to dry well.
9.7 Replacing the diaphragm
NOTICE
Damage caused by unsuitable auxiliary tool
Using unsuitable tools damage the diaphragm and associated components.
► Never use the diaphragm key with auxiliary tools (for example pliers or an Allen key without tor-
que limitation).
Spacer disks
Take care with any spacer disks that may be between the diaphragm support disk
and connection rod. Keep the spacer disks for each cylinder separate, and reinstall
the same number of original spacer disks.
Too few spacer disks
: Pump does not attain final vacuum.
Too many spacer disks
: Pump bangs (noise development).
Double diaphragm
You have to position the double diaphragms with the printed sides facing outwards.
Depending on the pump design, two diaphragm attachments may be possible when replacing the dia-
phragm:
Maintenance
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