Wilden Saniflo PS4 Hygienic Series, Engineering, Operation & Maintenance, Page: 21 / 36

WIL-12610-E-04
Wilden ®
21
Disassembly / Reassembly
Step 4
Lift away air chamber from center
section and remove center block gasket.
Replace gasket if necessary.
Step 5
Turn assembly over and remove the pilot
spool sleeve from the center section.
Step 6
Using an O-ring pick, gently remove the
O-ring from the opposite side of the
dimpled end of the pilot spool.
Step 7
Gently remove the pilot spool from the
sleeve and inspect for nicks, wear or
damage. Replace the pilot spool
assembly or sleeve O-rings if
necessary. During reassembly, never
insert the dimpled end of the pilot spool
first, this will damage the single
urethane O-ring by passing it over the
ports in the pilot sleeve.
NOTE: Seals should not be
removed from the assembly.
Seals are not sold separately.
Step 8
Remove modulator spool from center
section. Check for wear to spool or
O-rings and replace if necessary.
Step 9
Using the appropriate-sized wrench,
loosen the fasteners and lift away
remaining air chamber and center
block gasket from center section.
Replace gasket if necessary.