VACUUBRAND PC 2001TE VARIO - Manual (Page 42)

page 42 of 50
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 91 35 / 11/04/2008
Assembling pump heads:
Lift diaphragm at the side and position carefully together with
diaphragm clamping disc and diaphragm support disc in the
diaphragm key.
☞ Avoid damage of the diaphragm: Do not crack diaphragm in
a way that light lines occur on the upper side of the dia-
phragm.
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 final
vacuum. More washers: Clamping disc will hit head cover;
noise or even blockage of the pump.
Position new diaphragm between diaphragm clamping disc with
square head screw and diaphragm support disc.
☞ Note: Position diaphragm with white/blue PTFE side to dia-
phragm clamping disc (to pump chamber).
Bring diaphragm into a position in which diaphragm is in contact
with housing and centred with respect to bore.
Position pumping unit on the side and support appropriately.
☞ Make sure that the square head screw of the diaphragm
clamping disc is correctly seated in the guide hole of the
diaphragm support disc.
Assemble diaphragm clamping disc, diaphragm and diaphragm
support disc to connecting rod.
☞ Position washers if available between diaphragm support disc
and rod.
Assemble head covers and valves.
☞ Check for correct position (see fig. below).