Dover Wilden Original P1, Engineering, Operation & Maintenance, Page: 14 / 28

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Step 9.
Figure 9
Lift the liquid chamber away from the center section to
expose the diaphragm and outer piston.
Step 10.
Figure 10
Using an adjustable wrench, or by rotating the diaphragm
by hand, remove the diaphragm assembly from the center
section.
Step 11A.
Figure 11A
NOTE: Due to varying torque values,
one of the following two situations may
occur: 1) The outer piston, diaphragm
and inner piston remain attached to the
shaft and the entire assembly can be
removed from the center section.
Step 11B.
Figure 11B
2) The outer piston, diaphragm, inner
piston, and disc spring separate from
the shaft which remains connected to
the opposite side diaphragm assem-
bly. PTFE-fitted pumps come standard
with back-up diaphragms (not shown).
NOTE: Disc spring not shown on Figure
11B.
Step 12.
Figure 12
To remove the diaphragm assembly
from the shaft, secure shaft with soft
jaws (a vise fitted with plywood or other
suitable material) to ensure shaft is not
nicked, scratched, or gouged. Using an
adjustable wrench, remove diaphragm
assembly from shaft. Inspect all parts for
wear and replace with genuine Wilden
parts if necessary.
WILDEN PUMP & ENGINEERING, LLC WIL-10140-E-08
S e c t i o n 7
D I S A S S E M B L Y / R E A S S E M B L Y