Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check
carefully the validity of this document with respect to his product. Manual-no.: 999021 / 07/05/2008
page 16 of 22
➨
To check the valves use hex key to remove four socket-
head screws from pump head and remove housing cover
with head cover, valves and O-rings (MD 4 / MV 2 only).
☞
Never remove parts by using a spiky or sharp-edged tool
(e.g. screw driver), we recommend to use a rubber mallet or
compressed air (to be blown
carefully
into port).
➨
Remove head cover carefully from housing cover. Note po-
sition of valves and remove them.
☞
Replace valves if necessary.
☞
Use petroleum ether or industrial solvent to remove depos-
its. Do not inhale.
Cleaning and inspecting the pump heads:
➨
Use open-ended wrench, remove screw-in fittings from all
pump heads.
View of the disassembled pump head parts
seal rings (only MD 4 / MV 2)
housing cover
diaphragm support disc
housing
rod
washer
diaphragm
diaphragm clamping disc
head cover
valve
