Air Brake Valve Leaking
Hey guys, im having an issue with my air brake relay valve on my 2005 mack chn613 that i cant seem to figure out.
Air brake valve leaking. My initial failure was air leaking out of port 3 (caused by the gravel in the face seal). With the spring brakes released i have a slow leak and when i apply the service brake i have a huge leak out the bottom of the treadle valve. Problem #2 air leak at exhaust port of rear axle tractor relay with service and parking brakes released.
8 air gauge incorrect reading calibrate or replace. They also changed the dash valve and they are sure all the hoses are connected rightly. If it's the same air valve that releases the parking brake then replace it so the brakes won't drag because of low air pressure.
Goodysnap , feb 22, 2018 Air leak at brake (foot) valve exhaust port with service and parking brakes released. Bad leak somewhere in the brake system.
The drivers rear brake is leaking air through a small. Air brake relay valve leaking. Assure air delivery to emergency relay valve emergency port.
Page 1 of 2 1 2 next > oct 1, 2016 #1. This incident happened with @qcj coach at the rally, and it was a learning experience for us all. This will eventually cause the brake drum to overheat and possibly start a tire fire.
Visually inspect air brake lines, especially if you notice a slow buildup of air pressure. A typical commercial vehicle air braking system requires, at minimum, around a dozen core pneumatic valves to meet baseline regulatory. I understand that a leaking valve could be back flow from a leaking brake spring brake pot.
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