Some days when I push the yellow button - Truck parking brake, the air goes down and there is a hissing from the dash (no leaks, when checked outside the truck). If I push the button at 110-120psi and then pull and push a few times, the problem disappears. Should I replace the button or this is something else?
Parking brake problem
Discussion in 'Freightliner Forum' started by Verdel, Mar 12, 2015.
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