PSG Dover WILDEN PRO-FLO P.025, Engineering, Operation & Maintenance, Page: 18 / 28

WIL-10090-E-08
Wilden
®
18
Disassembly / Reassembly
Step 4
The air valve spool can now be removed.
A 4-40 UNC (Unified National Coarse
thread) screw can be screwed into the
threaded hole located in the center of the
spool. Grip the screw with pliers and
remove. If a 4-40 UNC screw is not
available, the spool can be tapped out
against a wood block or blown out with
compressed air. Upon reassembly,
lubricate air valve with NLGI grade 2 white
EP bearing grease or equivalent.
Step 5
Remove the porous polyethylene
muffler element by sliding it toward the
end-cap opening. The element can be
cleaned by soaking it in a cleaning
solution (no solvents). If the muffler
restricts the air exhaust, replace muffler
element.
Step 6
Remove pilot spool retaining ring with an
O-ring pick.
Step 7
Push pilot spool through center section and remove. Inspect seals for
integrity and spool for damage. Replace pilot spool assembly if necessary.
Upon reassembly of spool, apply a film of NLGI grade 2 white EP bearing
grease or equivalent).
.