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Detach the coupling of the connection tube (V)
to the other side of the pump at the valve head
(O).
V
O
U
➨
Remove the 4 screws affixing the head cov
-
er cowling (W) with a Torx driver T20. Pay
attention to the washers under the screws
and remove.
➨
Pull off head cover cowling (W) carefully. Do
not tilt.
➨
For maintenance, lay the pump on its side with the pump heads to be
maintained at the top. Support the pump appropriately.
W
Opening the hose clip:
➨
Apply slotted screwdriver as shown and
turn.
➨
Open the hose clip (U) with a slotted screw-
driver.
➨
Pull the tubing off the hose connector.
➨
Disassemble head covers (J) to check the
diaphragm (F).
➨
Unscrew four (pump with two heads) or eight
(pump with four heads) Allen screws (H) with
a 5mm wide Allen key. Remove both head
covers (J) (pumps with two heads: only one
head cover) together with valve heads (O)
and connections.
☞
It is not necessary to disassemble the valve
heads (O), the connection fasteners (Q), or
the hose connection between the adjacent
head covers (pumps with four heads).
Replacing the diaphragm
J H
O
Q
