Cautionary Notes
Equipment Involved in this Procedure
Procedure

You must be properly trained on the use of the manipulator arm prior to accomplishing this procedure; see training list.

One each contained in air system boxes labeled "Dryer 1" and Dryer 2," mounted on west wall of Boiler room in Operations building, either side of large tank.

Isolate the dryer from the air system

Clean only ONE AT A TIME.

Must be unplugged when cleaning.

Bleed line prior to cleaning.

Needle nose pliers; Location: tool chest in 2.5m work area

KimWipes/cotton swabs

Silicone lubricant

5/8" wrench

1/2" deep-well socket

Crocus cloth

Definitions:
"NO" = normally open
"NC" = normally closed

1. Close valve on copper line labeled "Compressor out NO"

   
   

2. Close valve on copper line labeled "Dryer NO"

   
   

3. Turn off power switch

   
   

4. Open "Drain vent NC" and remove dryer cover

   
   

5. Disconnect lower hoses (3 ea) with wrench

   
   

6. Remove lower nut with socket

   
   

7. Remove solenoid air pilot valve

   
   

8. Remove two center nut and lock washer attaching nut to backplate

   
   

9. Remove remaining hose

   
   

10. Remove shuttle valve unit

    
    

11. Slide unit off and remove spring; store in safe place (next 4 photos)

    
    

12. Photo of valve before disassembly

    
    

13. Remove manifold plate and gasket

    
    

14. Remove valve end cap

    
    

15. Using pliers, remove valve, white nylon, and plug

    
    

16. Remove shuttle valve (view of dirty valve before cleaning)

    
    

17. Dirt from inside valve cylinder

    
    

18. With alcohol, clean all removed housing parts. Clean shuttle valve with dish soap.

    
    

19. Clean inside of valve cylinder

    
    

20. Clean inside hose openings

    
    

21. Smooth manifold surface with Crocus cloth and clean with alcohol

    
    

22. Add a sheen of silicone lubricant to valve; remove excess

    
    

23. Clean all covers for valve unit

    
    

24. Apply thin coating of lubricant to manifold cover groove

    
    

25. Reassemble unit; add lubricant to all crews, tightening corner to corner

    
    

26. Put shuttle valve back into housing

    
    

27. Attach white seal and cover

    
    

28. Lubricate screws and tighten; make sure holes are centered when tightening

    
    

29. Reinstall shuttle valve unit to dryer

    
    

30. After shuttle valve is reassembled, turn all valves back to normal position (except "Open NO." Need to recylcel unit a fe wimte before opening this valve)
    1. Close vent valve

       
       

    2. Open inlet valve

       
       

    3. Plug in and turn on power
31. Cycle a few time then engage "Open NO"

    
    

32. Replace cover on unit, watch recylcing a few more times to make sure compressor dryers are working.

END OF PROCEDURE