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Altek P300 Anleitung Seite 23

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INFORMATION
The diaphragm replacement described
below is performed on the Altek pump when
dismantled.
When replacing a diaphragm on an installed
Altek pump it is essential to observe the
following:
–Switch off the drive.
–Secure the drive against being switched on
(e.g. take out the ignition key).
–Remove the drive shaft from the drive shaft
connection of the Altek pump.
–Drain the oil. It is not essential to do this if
the Altek pump is dismantled.
–Always dismantle only 1 valve cover at a
time. This will ensure that the suction con-
nection and pressure accumulator remain
fixed and cannot fall out.
Suction and pressure valves can be accessed
when the valve cover is removed!
–Perform the following actions:
Dismantle the Altek pump

Drain the oil – see Oil change

Remove suction and pressure line connec-
tions from the Altek pump.


If necessary remove the drive shaft.


Loosen and remove the bracket screws.

Remove the Altek pump and lay it on a

stable support (e.g. work bench) in its side,

on the valve covers.

Replacing diaphragms

The suction connection and pressure accu-
mulator are no longer fixed if all valve covers

on one side are removed at the same time.
CAUTION
Danger of accidents due to components
coming loose.
–Never lift the Altek pump by the suction
connection or pressure accumulator!
© Altek GmbH, 02/2021 – 83651, Version (c)
Maintenance Piston Diaphragm Pumps

Loosen the valve cover bolts (1).

Remove the valve cover bolts, washers (2)
and valve cover (3).



Loosen the diaphragm screw (4). ATTEN-
TION – diaphragm screws are bonded with
medium strength screw locking!


Remove diaphragm screw, washer (5),
diaphragm (6) and wedge ring (7).

Clean the diaphragm screw of screw

locking residues.

Clean the wedge ring (7).


Clean the sealing surfaces of the dia-
phragm on the pump housing and diaphragm

seating of the valve cover.


Clean the piston head (8).

Remove and clean the suction (9) and


E N
21

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