Air Brakes

[Dave J]

Hi,

I have a 2003 Friendship Quattro and for some reason the Park brake will not release.

I can not find any mention in any of the sparse manuals I have. Has anyone come across this problem before? Both air pressure gauges show over 125PSI. Could it be a fuse or a battery problem?

Many thanks for any help.

[RayChez1]

Dave, it sounds to me like you have a bad air leak in the emergency line which does not allow the pressure to be over 60 lbs to push against the springs which release the parking brake, which is on the rear only. And if you do not have an air leak, you have a restriction somewhere between the parking brake button which opens up the air flow to the valves on the rear which allows the springs to release.

How is your air dryer? The air dryer should be changed out at least once a year. If that filter gets plugged up, it could be problematic with your air brakes.

[Dave J]

Hi Ray,

Many thanks for the info. I shall check those out.

Cheers


Dave