airPUMP
AP025
(plastic)
www.sera-web.com
15
3)
Repeat the above steps for the suction
manifold (item12). The seat o-rings, valve
seats and valve balls (items 13, 14, &
15) are located in the liquid chambers
(item 18).
4)
Remove both liquid chambers by remo-
ving the six self-threading screws (item
11) using a T30 or T27 Torx bit and (5)
button head cap screws (item 17) using
a T20 Torx bit. Inspect and replace
diaphragms as needed.
5)
Remove the diaphragms (items 20),
begin by loosening the two outer plates
(item 19) using two 5/8” wrenches.
Use 6-sided sockets or wrenches to
prevent damage to the hex portion of
the outer plate.
6)
Remove the outer plate, diaphragm(s), and inner plate (items 19, 20, 21, 22, & 23) from the side that is loosened.
Pull or push the shaft (item 27) and remaining plates and diaphragms out of the center section. If pulling, it may be easier
to grip the diaphragm if it is inverted.
7)
The remaining diaphragm (item 20) and plates (items 19 & 23)
may be removed from the shaft (item 27) by hand or by placing
the shaft in a vise fitted with soft jaws.
Use a 6-sided 5/8” wrench to remove the remaining diaphragm
and plates. Soft jaws are required to prevent damage to the shaft.
A damaged shaft with result in accelerated o-ring wear.
Jaws can be fitted with wood, plastic, rubber, or other soft material
to prevent shaft damage.
After performing required maintenance, the pump can be reassembled. The pump can also be reassembled using the
disassembly instructions in the reverse order as listed above. For detailed assembly instructions, follow steps „Mounting“
instructions on next page.
