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WILDEN PUMP & ENGINEERING, LLC
WIL-10070-E-03
SECTION 8A
A2 PLASTIC
DIRECTIONS FOR DISASSEMBLY/REASSEMBLY
Figure 1
Step 3.
Figure 3
Using a screwdriver or other long, slim object, loosen the top
liquid retainers from the liquid chambers.
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.
The Wilden model A2 has a 25 mm (1”) inlet and 25 mm (1”)
outlet and is designed for flows up to 136 lpm (36 gpm). The
wetted path comes in both PVDF and polypropylene. The
single-piece center section, consisting of center block and air
chambers, is molded of polypropylene. All o-rings used in the
pump are of a special material and shore hardness that should
only be replaced with factory-supplied parts.
TOOLS REQUIRED:
1/2” Box Wrench
1/2” Socket
3/16” Allen Wrench
1/2” Socket Drive
2 – 1” Sockets or Adjustable Wrench
Adjustable Wrench
Vise equipped with soft jaws (such as plywood, plastic
or other suitable material)
NOTE: The model used for these instructions incorporates PTFE
diaphragms, balls, and seats. Models with rubber diaphragms,
balls and seats are the same except where noted.
DISASSEMBLY:
Step 1.
Before starting disassembly, mark a line from each liquid
chamber to its corresponding air chamber. This line will assist
in proper alignment during reassembly.
Step 2.
Figure 2
Using the 3/16” Allen Wrench, remove air valve bolts. Inspect
air valve assembly for wear or damage.
