Step 5.
Figure 5
After disconnecting nylon tube, lift air
valve away from the pump.
Step 6.
Figure 6
Using a 6mm (
¹⁄⁴
") hex head wrench,
remove the liquid chamber bolts that
connect the chamber cover to the liquid
chamber.
Step 7.
Figure 7
Lift the chamber plate away to expose
the chamber plate O-ring and the power
piston. Inspect chamber plate O-ring for
nicks, gouges, chemical attack or
abrasive wear. Replace worn parts with
genuine Wilden parts for reliable
performance.
Step 8.
Figure 8
To remove the power piston from the liquid
chamber, first place the liquid chamber
onto a table or sturdy flat surface.
Next,
with the liquid chamber resting on the
bolted flange
, apply 1.0 bar (15 psig) of air
pressure, via a rubber tipped air nozzle,
into the brass elbow located at the same
side as the pump discharge port.
CAUTION: The power piston may come
out of the liquid chamber with consid-
erable force. Altering the disassembly
method above is not recommended and
may cause physical harm.
Step 9.
Figure 9
The air pressure will force the power
piston away from the liquid chamber to
allow for easy removal.
Step 10.
Figure 10
Using a 5mm (
³⁄¹⁶
") hex head wrench,
remove the liquid piston from the power
piston by turning the power piston
screw counter-clockwise.
Chamber Plate O-ring
Power Piston
Power
Piston
Summary of Contents for Wilden Advanced H25
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