11
WILDEN PUMP & ENGINEERING, LLC
STEP 4.
Figure 4
REASSEMBLY NOTE:
When reinstalling
top retainers, be sure not to over tighten as
this may reduce pump performance. The
edge of the retainer, under the wrench
landing, must be flush with the top of the
liquid chamber.
STEP 5.
Figure 5
Remove top retainers from both liquid
chambers using an adjustable wrench.
STEP 6.
Figure 6
Remove and inspect valve ball and top
retainer for wear or damage. Replace with
genuine Wilden parts when required.
STEP 7.
Figure 7
Remove and inspect top retainer o-ring for
wear or damage. It is located on a landing
just under the threads for the top retainer.
Replace with genuine Wilden parts when
required.
STEP 8.
Figure 8
Remove the valve housing from the liquid
chamber by using a medium-sized flat
head screwdriver to gently pry it up. The
screwdriver is placed through a hole
located in the liquid chamber into an open-
ing just above the inlet valve ball.
STEP 9.
Figure 9
Remove the valve housing and inlet valve
ball from the liquid chamber and inspect for
wear or damage. Replace with genuine
Wilden parts when required.
STEP 10.
Figure 10
REASSEMBLY NOTE:
When reinstalling
valve housing, be sure to align hole in side of
valve housing with fluid port in liquid cham-
ber. If inserted incorrectly, fluid will not pass
to the discharge of the pump.
STEP 11.
Figure 11
Four o-rings are located on the inlet and
discharge ports of the center assembly
(two on each side). Inspect and replace if
necessary to ensure leak-free operation.
Note: If o-ring is removed, it must be
replaced with a new o-ring.
STEP 12.
Figure 12
Grasp edge of each diaphragm. Turn
counter-clockwise to loosen and remove
one diaphragm. Pull diaphragm with shaft
attached to it out of center housing.
Remove diaphragm from shaft. Inspect and
replace diaphragms as needed.
