Graco QUANTM i30 - Repair the Overmolded Diaphragms

Repair
36 3A8572B
Repair the Overmolded
Diaphragms
Required Tools:
• 10 mm socket wrench (for all i30 (QTC) models, i80
(QTD) plastic models, and i120 (QTE) plastic
models)
• 13 mm socket wrench (for i80 (QTD) metal models
and i120 (QTE) metal models)
• Torque wrench
• 25 mm open-end wrench
• Lubriplate
®
Synxtreme HD-2 grease (or equivalent
NLGI Grade 2 synthetic grease with calcium
sulfonate base)
See F
IG. 18–FIG. 20.
NOTE: Lubricate the motor rotor when replacing
diaphragms. See your related motor manual. See
Related Manuals, page 2.
Disassemble the Overmolded Diaphragms
1. Follow Prepare Equipment for Repair, page 32.
2. Follow Disassemble Check Valves, page 33.
3. Remove all fasteners (7, 7b, if applicable) from the
fluid covers (3). Remove the fluid covers (3).
4. Firmly grip the outer edge of a diaphragm (13) to
hold in place. At the same time, securely grip the
outer edge of the opposite diaphragm (13) and
rotate counterclockwise to loosen. Remove the
diaphragm (13).
NOTE: If needed, leave one fluid cover fastened.
With one diaphragm exposed, use both hands to
loosen the exposed diaphragm.
NOTE: Do not remove the diaphragm shaft (1a)
from the motor (1).
5. Remove the remaining diaphragm (13).
If the first loosened diaphragm (13) is on the
side of the shaft (1a) with the wrench flat:
a. Use an applicable wrench to firmly hold the flat
of the shaft (1a) in place. At the same time,
securely grip the outer edge of the opposite
diaphragm (13) and rotate counterclockwise to
loosen.
If the first loosened diaphragm (13) is opposite
the wrench flat on the shaft (1a):
a. Follow the procedure to lubricate the rotor in
your related motor manual to access the flat of
the shaft (1a). See Related Manuals, page 2.
b. After the flat of the shaft (1a) is accessible, use
an applicable wrench to firmly hold the flat of
the shaft (1a) in place. At the same time,
securely grip the outer edge of the opposite
diaphragm (13) and rotate counterclockwise to
loosen.
6. Clean and inspect parts for wear or damage.
Replace parts as needed.
7. Lubricate the rotor. See your related motor manual.
See Related Manuals, page 2.
FIG. 18: Overmolded Diaphragms
To avoid severe burns, do not touch hot fluid or hot
equipment.
NOTICE
To avoid damage to the rotor or equipment, do not
remove the shaft (1a) from the motor (1). Removing
the shaft will cause the rotor balls to dislodge from
the rotor and the rotor will not function properly.
3
7
7b
13
1
1a
21
14