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Valve replacement
<APN-085L/H>
1. Unscrew the pump head fix-
ing screws and take out the
pump head and valve.
2. Replace the old valve with
new one. Always check the
mating points and fit the
valve and the pump head in
place.
3. Supply air into the pump
head unit through the inlet
and check the air is dis-
charged through the outlet.
4. Push down the diaphragm
until it bottoms out and then
secure the pump head unit
onto the bracket with the
screws by 1.39N•m.
Pump head
Valve
Valve seat
■ Diaphragm replacement
<APN-085L/H>
1. Unscrew all the pump head
fixing screws and take out
the pump head, valve and
valve seat.
2. Remove the diaphragm
fixing screw and detach
the retainer plate and dia-
phragm.
3. Place a new diaphragm onto
the under retainer plate.
4. Place the retainer plate
onto the diaphragm. Apply
the LOCTITE® 222 to the
diaphragm fixing screw and
tighten it by 1.98N•m so as
to secure the retainer plate.
5. Push down the diaphragm
until it bottoms out and then
mount and secure the valve
seat, valve and pump head
onto the bracket with the
screws by 1.98N•m.
Screw
Diaphragm
Pump
head
Valve
Mating
points
Valve seat
Bracket
Diaphragm
fixing screw
Retainer
plater
Under
retainer plate
Con rod
