Air brakes operate differently from hydraulic ... The vehicle’s driver can monitor the air system pressure via a dash-mounted pressure gauge. If pressure in the system falls below 60 psi ...

The air pressure shown by your gauge(s) will stop rising. With the engine idling, step on and off the brake to reduce the air tank pressure. The compressor should cut-in at the manufacturer's ...

Repeatedly press and release the brake pedal to lower the air pressure in the tanks. Note the pressure reading on the gauges when the low air pressure warning activates. The low pressure warning must ...

The iconic hiss of air brakes is more than just a sound—it’s a crucial feature that enables massive trucks to stop safely and ...