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.
page 17 of 24
No. 47800-2-02-5
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Underneath the pump there is a connecting tube between the two housing covers. The connecting
tube is merely stuck into the housing covers and sealed with seal rings at the connecting tube’s ends.
If the housing cover is removed, the connecting tube becomes detached as well.
Replacing the diaphragm
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Check the diaphragm for damage and replace if neces-
sary.
➨
Lift the diaphragm carefully sidewise.
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Never use a spiky or sharp-edged tool to lift the dia-
phragm.
➨
Use the diaphragm key to grip the diaphragm support disc
under the diaphragm. Unscrew the diaphragm support
disc with diaphragm and diaphragm clamping disc.
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If the old diaphragm is difficult to separate from the support
disc, immerse assembly in naphtha or petroleum ether. Do
not inhale!
➨
Check for washers between the diaphragm support disc
and the connecting rod.
Do not mix the washers from
the different pump heads
. Make sure that the original
number is reassembled at the individual pump head.
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Smaller number of washers: The pump will not attain ulti-
mate vacuum. More washers: Clamping disc will hit head
cover; noise or even blockade and damage of the pump.
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Pay attention to washers. Do not remove, assemble the
original number of washers between the support disc and
the connecting rod.
➨
Screw diaphragm clamping disc, diaphragm, diaphragm
support disc and washers (if applicable) to connecting
rod.
➨
Optimum torque for the diaphragm support disc:
6 Nm
,
use torque key. Attach torque key to diaphragm key (hex-
agonal bolt 6 mm wide).
➨
Position the new diaphragm between the diaphragm clamping
disc with square head screw and the diaphragm support disc.
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Attention:
Double diaphragm! Put the two diaphragms to-
gether with the printed sides outwards.
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Make sure that the square head screw of the diaphragm
clamping disc is correctly seated in the guide hole of the
diaphragm support disc.
➨
Lift the diaphragm at the side and position it carefully
together with the diaphragm clamping disc and the dia-
phragm support disc in the diaphragm key.
☞
Avoid damage of the diaphragm: Do not bend the dia-
phragm too much.
