52
Replacing the diaphragm
1. Remove the dosing head
���
with
a suitable tool (size 3 Allen key).
Figure 1
2. With the dosing pump
operating, adjust stroke length
setting to 0% and then turn pump
off. Insert the locking pin
���
(Art.
No. 29379) through the drainage
pipe into the drilled hole in the
diaphragm rod
���
.
If the diaphragm rod has twisted
so that the drilled hole cannot be
reached, grab the outer edge of the
diaphragm
���
and turn it clockwise
until the drilled hole can be seen
through the drain pipe. The
diaphragm rod can then be secured
with the locking pin.
Figure 2
3. Switch off the pump.
4. Grab the edge of the diaphragm
���
and turn it counterclockwise.
The support plate
���
behind the
diaphragm is removed at the same
time.
Figure 3
IMPORTANT!
The diaphragm insert
���
and the
support plate
���
must be cleaned
before installing a new diaphragm.
Otherwise the diaphragm may be
attacked from the rear that is still
contaminated.
NOTICE!
Inspect that the deflector plate
���
is in perfect condition, „Check and
replacing the deflector“ (Chapter
11.2).
NOTICE!
IMPORTANT!
1
2
3
