Repair The Diaphragm - Graco SaniForce BV Series Instructions Manual

Repair the Diaphragm

Tools Required:
• Torque wrench
• 13 mm socket wrench
• 15 mm socket wrench
• 1 in. socket wrench
• 19 mm open-end wrench
• O-ring pick
• Lithium-base grease
Repair kits are available (purchase separately). Use all
parts in the kit for best results. See Kits and
Accessories, starting on page 34.
Service the diaphragms as follows. See F
Remove the Diaphragms
To avoid severe burns, do not touch hot fluid or hot
equipment.
1. Perform the Pressure Relief Procedure, page 12.
2. Disconnect all air and fluid lines from the
equipment.
3. Perform Remove the Check Valves, page 18.
4. Remove fasteners (106, 106b) from fluid covers
(101). Remove fluid covers from air covers (23).
5. Use an applicable wrench to loosen the diaphragm
shaft fasteners (107). Do not remove the fastener.
6. Remove one diaphragm assembly (401). See F
7. Remove the other diaphragm assembly (401) with
the shaft (24). See F
8. Disassemble the diaphragm plates (104, 105),
diaphragms (401), packing o-rings (108), and
fastener (107).
9. Clean and inspect for wear or damage. Replace as
needed.
3A8983A
. 7–F
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. 9.
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Install the Diaphragms
1. Assemble the diaphragm plates (104, 105), packing
o-ring (108), and diaphragm (401) onto the
diaphragm shaft fastener (107). See F
NOTE: Install diaphragms (401) with the side
marked AIR SIDE facing toward the center housing
(1). See F
2. Screw the diaphragm assembly onto one side of
the shaft (24). Torque to 20–25 in-lb (3.5–4.4 N•m).
3. Grease the length of the shaft (24) and slide through
the center housing (1).
. 9.
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4. Repeat steps 1–2 for the other diaphragm
assembly.
5. Apply medium-strength (blue) thread locker to the
threads of the fluid cover fasteners (106, 106b).
After reassembly, allow the thread locker to cure for
12 hours, or per manufacturer's instructions, prior to
operating the equipment. Damage to the equipment
will occur if the diaphragm shaft fastener loosens.
6. Align fluid covers (101) with center housing (1) and
insert fluid cover fasteners (106, 106b). Torque the
fasteners (106, 106b). See Torque Fasteners,
page 36.
7. Perform Install the Check Valves, page 18.
8. Reconnect air and fluid lines to equipment.
. 7.
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. 8.
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NOTICE
Repair
. 9.
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