Graco XP70s-hf 577222 [58/86] Replace over pressure relief valves

Graco XP70s-hf 577222 [58/86] Replace over pressure relief valves
Repair
58 3A6283H
Replace Over Pressure Relief
Valves
1. Flush all system components. Follow the complete
Flushing procedure starting on page 44.
2. Ensure handle (712) is in the down position.
Remove the screws (713), jam nut (704), handles
(711), handle rod (712), clips (718), and
springs (720).
3. Unscrew both over pressure relief valves (702) from
the manifold.
4. Apply blue threadlock to new over pressure relief
valves (702) and install in the manifold. Torque to
28-32 ft-lb (38-43 N•m).
5. Place a spring (720) over each valve stem. Place a
clip (718) in each valve stem groove to retain the
springs.
6. Slide handle (711) onto valve stem and rotate
approximately 90° until you feel it fully lock against
the valve seat. Repeat for opposite side.
7. Remove handle then place handle (711) on valve
stem (302) at the vertical, or near vertical, position.
8. Apply blue threadlock on the nut (704) threads and
tighten the handle against the spring (720) and
clip (718). Torque to 70-80 in-lb (7.9-9 N•m).
9. Place the rod (712) and the second handle (711) on
second valve stem aligned with the opposite handle.
10. Repeat step 9.
11. Install two screws (713) in handles (711).
12. Check operation of the handle and valves.
13. Operate the handle in and out of the spray and
circulate positions.
14. Check for clearance with fittings.
NOTE:
Both valves should settle firmly into the spray
position inward against the seats in the valve.
Both valve stems should rotate out to their most
extended positions when the handle is pulled down
to the circulate position.
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