WIL-10187-E-03
Wilden
®
18
Disassembly / Reassembly
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 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 P4 plastic pump utilizes a revolutionary Pro-Flo
®
air distribution system. A 13 mm
(1/2") air inlet connects the air supply to the center section. Proprietary composite seals reduce the
coefficient of friction and allow the P4 to run lube-free. The Pro-Flo
®
air distribution system is
designed to perform in on/off, non-freezing, non-stalling, tough duty applications.
NOTE:
Replace worn parts with genuine Wilden parts for reliable performance.
Step 1
Loosen the air valve bolts utilizing a 3/16"
hex-head wrench and then remove muffler
plate screws
Step 2
Remove air valve end cap to expose air
valve spool by simply lifting up on end cap
once air valve bolts are removed.
Step 3
Lift away air valve assembly and remove air
valve gasket for inspection. Replace
if necessary.
Step 4
Loosen the air valve bolts utilizing a 3/16"
hex-head wrench and then remove muffler
plate screws
