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10 .
16 .
Fig. 3: Air valve maintenance
Dismantle the air valve
Reassemble the air valve
22.
13 .
14 .
15 .
1.
Remove the 4 screws (11)
2.
Remove the air valve housing (1)
3.
Remove the seals (8 and 12).
ð Check the seals and replace as necessary.
4.
Using pliers, remove the two safety collars (7) of the air valve
and the two end stops (6)
ð Replace the O-rings (3) as necessary.
5.
Pull the piston (2) out of the control cylinder. Ensure that the
piston is not scratched or damaged
6.
Clean the piston with a soft cloth
7.
Check the piston for scratches and signs of wear
ð Replace the piston as necessary.
8.
Check whether the control cylinder (is one part of 2) is dirty
on the inside or scratched
ð Replace the control cylinder and piston (2) as necessary.
9.
Insert an end stop (6) with O-ring (3) and safety collar (7) in
the air valve housing (1)
10.
Remove the new control cylinder and piston (2) from the
plastic bag and pull the piston out of the control cylinder
11.
Push the six O-rings (3) on to the control cylinder and press
the O-rings into the recesses
12.
Coat the O-rings thinly with grease prior to fitting the control
cylinder in the air valve housing
13.
Align the slots in the control cylinder with the slots in the air
valve housing (1)
Maintenance of the double diaphragm pump
6.
3.
12.
21.
20 .
23 .
7.
3.
2.
11.
10.
9.
8.
1.
3.
6.
7.
24.
A1137
21
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