User's Manual

Repair
8. To ensure proper seating and extend diaphragm
life, apply air pressure to the pump prior to
attaching the second fluid cover.
a. Place the supp
lied tool (302) where the air
valve gasket (
105) normally goes. Arrows
(A) must face t
oward the fluid cover that is
already atta
ched.
Figure 2 Fluid cover tool
b. Reattach the air valve.
c. Supply a minimum of 20 psi (0.14 MPa, 1.4
bar) air pressure to the air valve. Shop air
may be used. The diaphragm will shift so the
second fluid cover will seat properly. Keep
air pressure on until the second fluid cover
is attached.
d. Attach the second fluid cover (3). See
Torque Instructions, page 19.
e. Removetheairvalveandthetool(302),
replace the gasket (105), and reattach the air
valve. See Torque Instructions, page 19.
NOTE: If you
are replacing the diaphragms
but not the a
ir valve, you must remove the air
valve and g
asket, put the tool in place of the
gasket, an
dputtheairvalvebackontoget
the air pre
ssure needed for proper installation
of the seco
nd fluid cover. Remember to
remove the
tool and replace the gasket when
finished.
f. Reassemb
le the ball check valves
and manif
olds as explained in
Check Val
ve Repair, page 14.
18 3A2714B