WIL-11520-E-07 17 WILDEN PUMP & ENGINEERING, LLC
Tools Required:
• 3/16” Hex-Head
Wrench
• 1/4” Hex-Head Wrench
• Snap-Ring Pliers
• 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
hazardous effects of contact with your process fluid.
The Wilden Pro-Flo
®
SHIFT metal pumps utilize a revolutionary Pro-Flo
®
air
distribution system. Proprietary composite seals reduce the co efficient of friction
and allow the Pro-Flo
®
SHIFT to run lube-free. The Pro-Flo
®
air distribution system is
designed to perform in on/off, non-freezing, non-stalling, tough duty applications.
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.
AIR VALVE / CENTER SECTION DISASSEMBLY
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