Service The Isolation Valve - Graco HydroShield WMBH00 Instructions - Parts Manual

Service the the Isolation Isolation Valve
Service Service the Isolation
Remove Remove the Remove the the Isolation Isolation Valve Isolation
Use this procedure to remove the entire isolation
valve (227) from the isolation cabinet for service.
1. Prepare the isolation system for service. Follow
the steps under Prepare the Isolation System for
Service, page 60.
2. Use a flat blade screwdriver to open the isolation
cabinet door.
3. Slide the electrostatic shield (82) up to remove.
4. Remove the isolation valve cover (99):
a. Unscrew and remove the top screw (100)
and washers (19, 22).
b. Unscrew and remove the bottom screw (100)
and washers (19, 22).
5. Disconnect the wash fluid reservoir (69).
6. Before removing the two sensors from the
isolation valve, mark the location of each as a
guide when reassembling.
7. Remove the sensors from the isolation valve:
a. Loosen the top clamp and then disconnect
the sensor from the clamp.
b. Loosen the bottom clamp and then
disconnect the sensor from the clamp.
8. Disconnect the three push-connect air line fittings
(239) to the air cylinder: top, middle, bottom.
9. Remove the two fluid lines from the air cylinder:
a. Inlet npsm fitting (72).
b. Outlet npsm fitting (71). Instead of removing
fluid fitting (72), it is also possible to remove
the hose (76) from either the air cylinder or
from the pump (K).
10. 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 top front and back bolts (23) and
washers (19, 22) on the isolation valve cover
bracket (98).
b. The bottom front and back bolts (23) and
washers (19, 22) on the isolation valve cover
bracket (98).
11. Lift the isolation valve out of the cabinet.
3A7370B
Valve
Valve
Valve from Valve from the from the Cabinet the Cabinet Cabinet Reinstall the Reinstall Reinstall the the Isolation Isolation Valve Isolation
Use this procedure to reinstall the entire isolation
valve (227) into the isolation cabinet after servicing.
1. Attach the isolation valve to the top of the cabinet
stand (9):
a. The front screw (54) also holds the top
bracket for the isolation valve cover (98).
Insert the two screws (54) through the block
mount (224) and then insert into the top two
holes of the cabinet stand (9).
b. Thread the front bracket (16) onto the front
screw, followed by the washer (19), lock
washer (22), and hex nut (23). Tighten with
a wrench.
c. Thread the back bracket (98) onto the back
screw, followed by the washer (19), lock
washer (22), and hex nut (23). Tighten with
a wrench.
Figure 22 Block Mount Attached to Cabinet
Stand
Repair
Valve into Valve into the into the Cabinet the Cabinet Cabinet
61