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.: 999019 / 22/12/2009
page 22 of 29
RP 22C/35C VARIO (with MD 12C)
Cleaning and inspecting the pump heads:
☞
Please read the whole chapter ”Replacing diaphragms and valves” before
starting maintenance.
Partially the pictures show pumps in other versions. This doesn´t influence replacing diaphragms and
valves of the pump.
Set of seals (diaphragms and valves) for MD 12C
...................................................................
69 68 21
☞
If necessary, disassemble diaphragm pump MD 12C from pumping unit.
➨
Use open-ended wrench (w/f 15) to turn elbow fitting 1/4 of a
turn, remove hose.
☞
Do not remove the elbow fitting from the pump head. Through
reassembly a leak may result.
➨
Use open-ended wrench (w/f 17) to remove union nuts.
☞
Check diaphragm for damage and replace if necessary.
➨
Use Phillips screw driver to remove four countersunk head
screws and lift off housing plate together with fittings and
manifold.
➨
To check valves use hex key to remove four socket head
screws from pump head and remove upper housing (hous-
ing cover with housing cover insert), head cover, valves and
O-rings if applicable.
☞
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 from housing cover insert and check
valves. Note position of valves and remove.
☞
Replace valves if necessary.
☞
Use petroleum ether or industrial solvent to remove depos-
its. Do not inhale.
