Step 8.
Figure 8
Remove pilot spool bushing from
center block.
Step 9.
Figure 9
With o-ring pick, gently remove the o-
ring from the opposite side of the “center
hole” cut on the spool. Gently remove
the pilot spool from sleeve and inspect
for nicks or gouges and other signs of
wear. Replace pilot sleeve assembly or
outer sleeve o-rings if necessary. During
re-assembly never insert the pilot spool
into the sleeve with the “center cut” side
fi rst, this end incorporates the urethane
o-ring and will be damaged as it slides
over the ports cut in the sleeve.
NOTE:
Seals should not be removed
from pilot spool. Seals are not sold
separately.
Step 10.
Figure 10
Check center block Glyd™ rings for
signs of wear. If necessary, remove
Glyd™ rings with o-ring pick and
replace.
NOTE:
Threaded sleeves (see A —
Figure 10) are removable and can be
replaced if necessary. Sleeves can
be press fi t by hand.
Step 5.
Figure 5
Remove air valve spool from air valve
body by threading one air valve bolt
into the end of the spool and gently
sliding the spool out of the air valve
body. Inspect seals for signs of wear and
replace entire assembly if necessary.
Use caution when handling air valve
spool to prevent damaging seals.
NOTE:
Seals should not be remove
from assembly. Seals are not sold
separately.
Step 6.
Figure 6
Remove pilot spool retaining snap
ring on both sides of center section
with snap ring pliers.
Step 7.
Figure 7
Remove air chamber bolts with 1/4"
hex head wrench.
A
WIL-10161-E-01
23
WILDEN PUMP & ENGINEERING, LLC
PRO-FLO
®
AIR DISTRIBUTION SYSTEM (ADS) DISASSEMBLY
