Sunrise Medical DeVilbiss 505DZ Service Manual page 44

C O M P O N E N T T E S T I N G , R E P A I R & R E P L A C E M E N T
To remove four-way valve (Figure 41):
1. Unplug the unit from the wall outlet.
2. Remove the front cabinet.
3. Disconnect the two wires from terminals on pilot valve.
4. Remove the pilot pressure tubing from pilot valve.
5. Remove the two allen-head cap removal screws from top of four-way using an allen wrench.The top of valve body and gasket can
now be removed.
NOTE—Do not remove manifold.The manifold will remain on the unit whether you are cleaning or replacing the valve.
Hose Clamp
1/16" I.D. hose
Pilot valve
Purge valve
9/64"
Alien-head cap
screws
Four-way valve
Pilot valve
1/4" I.D. hose
1/8" I.D. hose
(to accumulator tank)
1/2" I.D. hose
Figure 41
44
Hose Clamp
Sieve bed test points
Manifold base
Valve isolation mounts
Hose Clamp