WIL-11520-E-08
20
PS1520/1530 Bolted Metal
AIR VALVE / CENTER SECTION DISASSEMBLY
Tools Required:
3/16" Hex-Head Wrench
1/4" Hex-Head Wrench
Snap-Ring Pliers
O-Ring Pick
CAUTION:
Before attempting any maintenance or repair, disconnect the compressed
air line to the pump and allow all air pressure 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.
NOTE:
Replace worn parts with genuine Wilden parts for reliable performance.
Step 1
Step 2
Step 3
Using a pair of snap-ring pliers, remove
the snap ring from the pilot sleeve.
Using an O-ring pick, remove the O-ring
from modulator spool.
Using the appropriate-sized wrench,
loosen and remove the fasteners that
attach the air chamber to the center
section.
Step 4
Step 5
Step 6
Lift the air chamber away from the center
section and remove the center block
gasket. Replace gasket, if necessary.
Turn the assembly over and remove the
pilot spool sleeve from the center section.
Using an O-ring pick, gently remove the
O-ring from the opposite side of the
dimpled end of the pilot spool.
DISASSEMBLY / REASSEMBLY
