VACUUBRAND ME 2SI - Manual (Page 23)

page 19 of 24
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.: 99 56 52 / 10/07/2007
Assembling pump heads:
Replacing a diaphragm with square hole
➨ Position new diaphragm between diaphragm clamping disc
with square head screw and diaphragm support disc.
☞ Note: Double diaphragm.
➨ By turning eccentric bushing (front of connecting rod), bring
connecting rod into a position in which diaphragm is in con-
tact with housing and centred with respect to bore.
Reassemble in reverse order.
➨ Install head cover (with O-ring if applicable), valves and hous-
ing cover.
☞ Make sure that the valves are correctly seated: Valves at
the outlet with round centred opening under valve, valves at
the inlet with kidney-shaped opening beside valve.
➨ By turning eccentric bushing, bring connecting rod into up-
per turning point position (Max. stroke of the rod).
☞ Pay attention that the diaphragm stays positioned centrally
so that it will become clamped uniformly between housing
and head cover.
➨ 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.
➨ Use the face wrench with torque indicator to assemble
diaphragm clamping disc, diaphragm and diaphragm sup-
port disc (and eventually washers) 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.