VACUUBRAND MZ 2C +AK+M+D - Manual (Page 19)

page 19 of 26
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.: 999058 / 05/10/2009
➨ Use face wrench with torque indicator (recommended: face
wrench with torque indicator from VACUUBRAND, Cat.-
No.: 637580) to assemble diaphragm clamping disc, dia-
phragm and diaphragm support disc (and eventually wash-
ers) to the connecting rod.
☞ Make sure that the square head screw of the diaphragm
clamping disc is correctly seated in the guide hole of the
diaphragm support disc.
Optimum torque for the diaphragm support disc: 6 Nm.
☞ The optimum torque is achieved if the pointer in the handle
of the VACUUBRAND face wrench shows to the longer mark-
ing line.
Replacing the diaphragm:
➨ Position new diaphragm between diaphragm clamping disc
with square head screw and diaphragm support disc.
☞ Note: Position diaphragm with white PTFE side to diaphragm
clamping disc (to pump chamber).
➨ 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.
☞ Check diaphragm for damage and replace if necessary.
➨ To do so use Phillips screw driver to remove four counter-
sunk head screws and lift off housing plate with rating plate.
☞ Use petroleum ether or industrial solvent to remove depos-
its if necessary. Do not inhale.
➨ Use a face wrench to remove diaphragm support disc.
➨ Check for washers under clamping disc. Do not mix the wash-
ers from the different heads. Make sure that the original
number is reassembled at the individual pump head.
☞ Smaller number of washers: The pump will not attain ulti-
mate vacuum. More washers: Clamping disc will hit head
cover; noise or even blockade of the pump.