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WIL-11113-E-04
15
HS430S High Pressure Bolted Metal
Step 10
Step 11
Step 12
Inspect the diaphragm assembly for wear,
damage or chemical attack. Replace any
damaged components with genuine
Wilden parts for reliable performance.
To remove the diaphragm assembly from
shaft, secure shaft with soft jaws
(aluminum, plastic, or plywood) to ensure
the shaft is not damaged. Using an
adjustable wrench, remove the diaphragm
assembly from the shaft.
Remove outer piston and stud if
equipped. Inspect for wear and replace if
necessary.
Step 13
Step 14
Locate the outer piston on the side of the
amplification chamber has an air
passageway at the center of the outer
piston lug. This air passageway allows air
to flow from the opposite air chamber to the
amplification chamber. This principle is how
the HS430S high-pressure pump achieves
a 2:1 ratio of inlet air pressure to discharge
pressure.
When reassembling the HS430S pump, the outer piston (with the air passageway) has to
be positioned on the same side as the amplification chamber. If it is not reassembled
correctly, the pump will not operate, and process fluid will enter the air distribution system
through the air passageway located at the shaft lug.
This same air passageway continues through the diaphragm shaft, exits out of the
diaphragm shaft via a 90º turn and into the air chamber located on the wetted side of the
pump. The air passageway has to be positioned in the air chamber on the wetted side of
the pump, opposite the amplification chamber.
DISASSEMBLY / REASSEMBLY