What should I do if the barometer of 5800 car spray gun can't be adjusted?

1. Ensure the normal supply of air source, check whether the air source pressure gauge works normally, and check whether the air source pipeline is blocked or leaked.

2. The barometer is associated with the pressure regulating valve. Check whether the pressure regulating valve is installed correctly, and ensure that the adjusting knob or screw of the pressure regulating valve is not loose or stuck.

The barometer can't work normally due to the accumulation of dust, grease or other dirt.