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Repair
Reassemble
Reassemble the
Reassemble
the
the Overmolded
Overmolded
Overmolded Diaphragms
NOTICE
NOTICE
NOTICE
After reassembly, allow the thread locker to cure
for 12 hours, or per manufacturer's instructions,
prior to operating the pump. Damage to the pump
will occur if the diaphragm shaft bolt loosens.
TIP: If you are also repairing or servicing the center
TIP:
TIP:
section, follow
Center Section Repair, page
before replacing diaphragms.
1. Lubricate and install the shaft u-cups (106) so
out
out
out
the lips face
of the housing (101).
2. Assemble plate (9) onto diaphragm (10) with
screw (14). Rounded side of plate (9) should
face diaphragm. Make sure the side marked AIR
SIDE faces the center housing.
Apply a high-strength thread locker to
1
attach the screw to the diaphragm.
Apply a medium-strength thread locker
to the shaft side of the screw (14).
3. Screw assembled diaphragm assembly into shaft
(24) and hand tighten.
4. Grease the length of the diaphragm shaft (24),
and slide it through the housing (101).
5. Assemble the other diaphragm assembly to the
shaft as explained in step 2.
16
Diaphragms
Diaphragms
6. Grip both diaphragms securely around the outer
18,
7. Align the fluid covers (15) and the center housing.
edge and rotate clockwise until bottomed on the
shaft.
NOTE:
NOTE:
NOTE: Apply waterproof, sanitary lubricant to the
clamp (21) and clamping surface of the cover (4,
15) to ease assembly.
NOTE: Use a food grade anti-seize lubricant on
NOTE:
NOTE:
the clamp threads to aid assembly.
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.
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 0.7–1.4 bar (0.07–0.14
MPa, 10–20 psi) 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: Too much air pressure may cause the
NOTE:
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).
.
812.0063
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