MILEAGEMAN

that is a mouth full^^^^^^^^^^^^^^^^^^the first thing i was told to check was to make sure the brake pedal wasnt stuck or sticking.  what is a trolley valve?

the release valve isn't leaking.  could there be other issues with it?

the valve leaked when i released the brakes.  i put the new valve on and it leaked when the brakes were applied and released.  i caped off the two air lines going to the leaking brake can and that didnt help.  i ordered another valve.  im at a loss.   

i like old trucks and always wanted a wanted twin stick with a jake brake.  a farmer had this mack a mile from my house and hadn't used it in ten years.  the problem obviously is i dont know much about trucks so the honeymoon period is rapidly  vanishing.  thanks for everyone's help and patients.   

the truck shop used 239649-A that is stamped on the valve.  it comes in Tuesday.  

thanks for all the help I got one ordered.  

there is a brake can leaking also on the truck.  if i took the valve off for no reason im going to cry.  

the number on the valve is 239649-A and the tag number on the valve is A21690

great will do later today

I have a 1967 R700 Mack.  The air valve under the brake pedal under the cab fire/wall is leaking.  Can someone please tell me where the best place is to purchase a new one.  any help is appreciated.  thanks