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Repair
7. Align the fluid covers (4, 15) and the center
housing. Secure the covers with the clamps (21)
and hand tighten. If, after installing the first fluid
cover, the opposing diaphragm protrudes away
from the center housing, leaving a gap between
the center housing and the second fluid cover,
do not try to force the diaphragm into position.
Instead, complete the following procedures in
steps 7a–7i to attach the second fluid cover.
NOTE: Ball pump fluid covers are
NOTE:
NOTE:
interchangeable.
NOTE: Flapper fluid covers are not
NOTE:
NOTE:
interchangeable and their orientation is
critical on horizontal pumps. Horizontal pump
fluid covers must be positioned so that the
flappers hang down from the hinge pin when
placed in the fluid cover. Install the flapper valves
(8) with the text side facing the seat.
a. Remove the air valve cover (B), the gasket
(C), and the pilot cup (D). See the image in
step i.
b. Within the drive, shift the main air valve
carriage (E) away from the installed fluid
cover. This will expose the air passage that
feeds the assembled side.
c. Reinstall the gasket (C) and the air valve
cover (B). Torque all bolts according to
instructions in your pump manual.
d. Supply the pump with 10–20 psi (0.07–0.14
MPa, 0.7–1.4 bar) air pressure, just enough
to move the diaphragm. The diaphragm
will shift so the second fluid cover will seat
properly. Keep the air pressure on while air
flows out of the exhaust.
NOTE:
NOTE: Too much air pressure may cause the
NOTE:
diaphragm to deform and seat incorrectly.
e. Install the remaining fluid cover.
f.
Follow the
Pressure Relief Procedure, page 9
Disconnect the air supply from the pump.
g. Remove the air valve cover (B) and the
gasket (C).
h. Lubricate and reinstall the pilot cup (D).
18
i.
Reinstall the gasket (C) and the air valve
cover (B). Torque all bolts according to
instructions in your pump manual.
8. Reassemble the ball check valves and manifolds
as explained in
.
Check Valve Repair, page
12.
812.0065
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