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 18 of 29
Cleaning and inspecting the pump heads:
RP 12C and RP 15C VARIO (with MD 4C)
☞
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 4C
.....................................................................
69 68 15
☞
If necessary, disassemble diaphragm pump MD4C from pumping unit.
➨
Use open-ended wrench (w/f 17) to remove union nuts.
➨
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.
➨
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 and valves.
☞
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.
