Manual 821 Service Manual

AIR CONTROLS

Pressurized air lines are normally used at just two points in the Apquip System:

1) Air supply to pressurize the tank.

2) Air supply to the Control Enclosure to operate the applicator valve.

This system requires a maximum of 60 PSIG of clean, dry air. Moisture and compressor blowby will affect the performance of the system’s spool/sleeve assembly. The

Apquip system includes Coalescer / Filter to remove normal levels of impurities.

Do not lubricate the air supply.

All control lines are 1/4” plastic tubing. The air fittings are the quick release type. To attach an air line, push the plastic tubing firmly into the fitting (See A). To remove the air line, depressurize the line, push the tubing firmly into the fitting, then using your fingers, push the locking ring in on the fitting. While holding the lock ring in, pull the tubing out. (See B)

Replace the Coalescer Filter Element whenever it is no longer white in color. Continued use of a contaminated Element will permit impurities to cause inconsistent operation of the Air Electric Valve. A combination of cold air in the mill and oil in the air supply can also cause intermittent or sluggish Air Electric Valve operation.

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