T O O L S R E Q U I R E D :
• 3/16” Hex-Head Wrench
• 1/4” Hex-Head Wrench
• O-ring Pick
CAUTION: Before any maintenance or repair is attempted, the compressed air line
to the pump should be disconnected and all air pressure allowed to bleed from the
pump. Disconnect all intake, discharge and air lines. Drain the pump by turning it
upside down and allowing any fluid to flow into a suitable container. Be aware of
any hazardous effects of contact with your process fluid.
A I R V A L V E / C E N T E R S E C T I O N D I S A S S E M B L Y
Step 1
Using a pair of snap-ring pliers,
remove the snap ring from pilot
sleeve.
Step 2
Using an O-ring pick, remove O-ring
from modulator spool.
Step 3
Using the appropriate-sized wrench,
loosen and remove the fasteners
that attach the air chamber to center
section.
WILDEN PUMP & ENGINEERING, LLC
13
WIL-11112-E-01
