WILDEN PUMP & ENGINEERING, LLC 14 WIL-11520-E-07
Tools Required:
• 9/16" Socket Wrench
• 15/16" Socket Wrench
• 1-1/8" Socket Wrench
• Vise equipped w/
soft jaws (such as
plywood, plastic
or other suitable
material)
CAUTION: Before any maintenance or repair is attempted, the compressed air line
to the pump should be disconnected and all air pressure allowed to bleed from the
pump. Disconnect all intake, discharge and air lines. Drain the pump by turning it
upside down and allowing any fluid to flow into a suitable container. Be aware of
any hazardous effects of contact with your process fluid.
NOTE: The model photographed is an aluminum PX820 51 mm (2”) pump. Your
specific pump model may vary from the configuration shown; however, pump
disassembly procedure will be the same.
Step 1
Before starting disassembly, mark
a line from each liquid chamber to
its corresponding air chamber. This
line will assist in proper alignment
during reassembly.
Step 2
Using the appropriate-sized wrench
for your pump size, loosen the
discharge manifold from the liquid
chambers.
Step 3
Lift the discharge manifold to
expose discharge valve balls and
valve seats. Inspect ball cage area
of manifold for excessive wear or
damage.
Section 7
PUMP DISASSEMBLY
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