Standard Diaphragm Repair - Graco SaniForce 1590 Repair Parts

Repair
Standard Diaphragm Diaphragm Repair
Standard Standard Diaphragm
NOTE: NOTE: Overmolded diaphragms are covered in NOTE:
Overmolded Diaphragm Repair, page
Tools Required: Required:
Tools Tools Required:
• Torque wrench
• 5/8 in. wrench
• 19 mm open end wrench
• O-ring pick
• Lithium base grease
NOTE: Center section gasket is dependent on
NOTE: NOTE:
diaphragm material. If changing diaphragm material,
it may be necessary to also replace the center
section air cover gaskets. See
affected air cover gaskets.
Disassemble Disassemble the Disassemble the Standard the Standard Diaphragms Standard
NOTE: Diaphragm kits are available in a range of
NOTE: NOTE:
materials and styles. See Parts section.
1. Follow the Pressure Relief Procedure, page 9
2. Remove the manifolds and disassemble
the check valves as explained in
Check Valve Repair, page
3. Remove the clamps (21) from the fluid covers
(15), then pull the fluid covers off of the pump.
4. With both fluid covers removed, using two 5/8 in.
wrenches, hold the wrench flats on the plates (Y)
of each diaphragm assembly and loosen. One
diaphragm assembly will come free and the other
will remain attached to the shaft.
14
Repair
Repair
16.
Parts, page 22 , for
Diaphragms Diaphragms
.
12.
5. Disassemble the free diaphragm assembly.
6. Remove plate (12) with bolt (14) installed,
diaphragm (10), backer (11) if present, and plate
(9).
7. Pull the other diaphragm assembly and the
diaphragm shaft (24) out of the center housing
(101). Hold the shaft flats with a 19 mm open end
wrench, and remove the diaphragm assembly
from the shaft. Disassemble the remaining
diaphragm assembly.
8. Inspect the diaphragm shaft (24) for wear or
scratches. If it is damaged, inspect the bearings
(111) in place. If the bearings are damaged, refer
to Center Section Repair, page
9. Reach into the center housing (101) with an
o-ring pick and hook the u-cups (106), then pull
them out of the housing. This can be done with
the bearings (111) in place.
10. Clean all parts and inspect for wear or damage.
Replace parts as needed.
19.
3A6781D