I have a 90 freightliner I use for hauling grain on the farm. Hooked up to trailer yesterday and the red button will not push in. Truck brakes worked fine until I hooked to trailer. The yellow button will not push in either.
Unhook gladhands and yellow button works and the red will blow air but still difficult to push in.
Tried a different trailer with the same results.
I replaced the tractor protection valve in the cab a few years ago trying to fix a problem (which it didn't) so I do not believe it to be the problem but maybe? I just remember it not being much fun...
I have unhooked and blew air through many line but nothing has helped so far
Any ideas?
Thank you
Unhook gladhands and yellow button works and the red will blow air but still difficult to push in.
Tried a different trailer with the same results.
I replaced the tractor protection valve in the cab a few years ago trying to fix a problem (which it didn't) so I do not believe it to be the problem but maybe? I just remember it not being much fun...
I have unhooked and blew air through many line but nothing has helped so far
Any ideas?
Thank you