American Dryer Corp ML-310 Phase 7 service manual

f. 4-Way Valve, 3-Way Valve, and Supply Air Disable Valve Replacement

1)Discontinue electrical power to the dryer.

2) Disconnect compressed air supply from the dryer.

3) Remove the 1/4-20 self- tapping screws securing the pneumatic panel cover.

4) Remove the two (2) 1/4-20 screws securing the junction box cover.

5) Loosen the cord grip cap that the valve wire go through.

6)Loosen the appropriate wire on the terminal strip.

Identify these wires and make note of their placement.

7)Loosen the bolts holding the assembly to the pneumatic panel.

(For 3-way valve/supply air disable valve replacement proceed to Step #13.)

8)Remove the two (2) 1/4” poly compression fittings (door open - door close).

9)Remove the two (2) 1/4” poly x 1/8” M.P.T. connectors from the valve body.

10)Twist/remove the 4-way valve body off of the 1/8” street elbow.

11)Remove the muffler (silencer) off of the valve body.

12)To install new 4-way valve, reverse above procedure (Step #11 thru Step #1).

13)Remove the 1/4” poly compression fitting.

14)Remove the 3-way valve and supply air, disable the valve from the 1/8” M.P.T. nipple.

15)Remove the muffler (silencer) off of the valve body.

16)To install new 3-way valve and supply air disable valve, reverse (Step #15, 14, 13, and Step #7 thru Step #1).

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