Service The Isolation Valve - Graco HydroShield Instructions Manual

Repair
Service the the Isolation Isolation Valve
Service Service the Isolation
Remove the the Isolation Isolation Valve
Remove Remove the Isolation
Use this procedure to remove the entire isolation
valve (15) from the isolation cabinet for service.
1. Prepare the isolation system for service. See
Prepare the Isolation System for Service, page
93.
2. Use a flat blade screwdriver to open the isolation
cabinet door.
3. Slide the electrostatic shield (82) up to remove.
4. Slide the electrostatic shield (12) to the left to
remove.
5. To remove the isolation valve cover (99), loosen
the top and bottom screws (99a).
6. Remove the isolation fluid pump for better access
to the isolation valve mounting. Follow the steps
in Remove the Isolation Fluid Pump from the
Cabinet, page 104.
7. Disconnect the wash fluid bottle (69).
8. Before removing the two sensors from the
isolation valve, mark the location of each as a
guide when reassembling.
9. Remove the sensors from the isolation valve:
a. Loosen the top clamp (101) and slide sensor
bracket (102) free of the clamp.
b. Loosen the bottom clamp (101) and slide
sensor bracket (102) free of the clamp.
10. Disconnect the three push-to-connect air line
fittings (239) to the isolation valve: top, middle,
bottom.
11. Remove the two fluid lines from the isolation
valve:
a. Inlet npsm fitting (72).
b. Outlet hose (84) that connects to the outlet
elbow (71). The outlet hose can also be
removed from the isolation fluid pump (K).
12. Disconnect the isolation valve from the cabinet
stand (9). On opposing sides of the cabinet
stand, use a 3/16 inch Allen wrench and a 7/16
inch wrench to remove:
a. The front top and bottom hex nuts (23), lock
washers (22), and flat washers (19) on the
isolation valve cover bracket (98).
b. The back top and bottom hex nuts (23), lock
washers (22), and flat washers (19).
13. Lift the isolation valve out of the cabinet.
94
Valve
Valve
Valve from from the the Cabinet Cabinet
Valve from the Cabinet
Reinstall the Reinstall Reinstall the Isolation the Isolation Valve Isolation
Use this procedure to reinstall the entire isolation
valve (227) into the isolation cabinet after servicing.
NOTICE
NOTICE NOTICE
Before reassembling, clean the cabinet of residual
fluid.
1. Attach the isolation valve to the top of the cabinet
stand (9):
a. Insert the two screws (54) through flat
washers (19), the top block mount (224),
and then insert into the top two holes of the
cabinet stand (9).
b. Thread the washer (19), lock washer (22),
and hex nut (23) onto the back screw.
c. The front screw (54) also holds the top
bracket for the isolation valve cover (99).
Slide the bracket (98) onto the front screw,
followed by the washer (19), lock washer
(22), and hex nut (23).
Figure 34 Attach Isolation Valve to Cabinet
Stand
Valve into Valve into the into the Cabinet the Cabinet Cabinet
3A7370C