Will a flat trailer tire make the air pressure on a truck's brakes slow to build up?

Do you have a tiring airing system on your trailer? Does it still build slow with no trailer? Just leave the trailer brakes set so no air is going to the trailer and see if it does the same thing.

 

maybe if the trailer has the automatic tire inflation system

 

The air brake system has nothing to do with air in the trailer tires unless the trailer is equipped with a tire inflator system. Another reason that may take your air pressure a little while longer to build up is how many air bags on your truck and trailer that needs to be aired up.

 

only way they are connected is if trl has the psi system, which has a light on front corner of trl and has air lines going to each tires valve stem out of the center hub oil/grease cap. that is the only thing that would use air from tractor for tire psi?. i'm betting you have other issues. like post before leave trl brakes set then see how long it takes to build psi.

 

Um, you might want to get that tire fixed before anything else.

 

Do you have hoses going from the trailer tire valve stems to the hub caps? If so, you have a tire inflation system that uses trailer air to maintain tire pressure. If you have one, a tire off the bead is a big air leak. If you don't have an inflation system, the tire is not your air issue, but still get it fixed before you run.

 

I agree with Semi Retired. . If you have a flat you need to get that fixed.. also, it is possible to a flat tire and a leak in an air bag... heck, I once came across a trailer that had a flat tire, leaking air bag and a crappy glad hand seal... and it was a loaded trailer that a driver dropped at a drop yard... no way I was pulling that trailer until the tire and air bag were fixed.. the glad hand seal I could take care of myself...