VACUUBRAND VHC Pro - Manual (Page 20)

page 20 of 27
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. 25/11/2013 // 999281
➨ Lift diaphragm carefully sidewise.
+ Never use a pointed or sharp-edged tool to lift the dia-
phragm.
➨ Use the diaphragm key to grip the diaphragm support disc
below the diaphragm.
➨ Press down the diaphragm clamping disc to bring the
diaphragm to its lowest oscillating position. Unscrew dia-
phragm support disc with diaphragm and diaphragm clam-
ping disc.
+ If the diaphragm is difficult to separate from the diaphragm
support disc, immerse assembly in naphtha or petroleum
ether. Do not inhale vapors!
+ Check for washers between the diaphragm support disc
and the connecting rod. Make sure that the original num-
ber is reassembled.
➨ Note position of valves.
➨ Unscrew four screws at the pump head, paying attention
to washers.
Remove housing cover.
➨ Unscrew union nut and remove hose from elbow fitting.
➨ Remove housing cover insert with elbow fitting.
➨ Remove head cover and valves.
+ Check diaphragm for damage.
+
Attention: In case of a defect diaphragm the interior
of the pump housing has to be decontaminated, e. g.,
using a spray disinfection.
+ The appropriate decontamination method has to be
ensured by the user.
+ Never remove parts by using a pointed or sharp-edged
tool (e.g., screw driver), we recommend to use a rubber
mallet or compressed air (to be blown carefully into port).