Castle AT-8 Diagnostics Manual - Manual (Page 21)

How To…
8.90 Adjusting the Regulator
The air for the machine is taken in and controlled through the regulator at the top of the machine. If
the air pressure seems low, it can be checked and adjusted at the regulator.
SOLUTION STEPS:
1. Visually check that the regulator gauge reads between 80 and 85 PSI.
2. If it does not, then pull the regulator knob to release it from its locked position.
3. Turn the knob while watching the gauge until it reads the appropriate pressure.
4. If there are other machines that use a lot of air pressure on the same line as the AT-8, then run the
other machines while someone reads the gauge.
5. It should remain between 80 and 85 PSI. If it drops significantly then the pressure should be turned
up at the compressor.