Trailer auto inflation system question

Look for the tire bulge.

It'll be obvious if you're loaded.

 

Spray down the valve stems and the hose connector - a lot of the times when they screw the hose one they don't get the threads seated well.

 

Not exactly what I had in mind.

 

Sometimes the lines that run through the axle amd hub will begin to leak for various reasons. These leaks can be VERY hard to hear and usually keep the light on for long periods of time then it may go off for a little while amd then come back on for a long period once again....

One way to check which tire is leaking is to make sure light is off when you get ready to park. Once you are parked close the valve that feeds air to the system. In the morning go check your tire pressures... If the system is working properly and nothing is leaking they should all be the same pressure. If all the same pressure but the light comes back on after opening valve and releasing trailer brakes, then your leak is somewhere else in the system other than the tires.

 

I'm getting ready to replace my trailer tires and I've been worried about this as well. I've worked for companies where the auto inflate systems were messed up from previous tire changes, and I want to avoid that on my trailer.

 

Are you talking about the huge bulge in the pic? That’s a bad retread.

 

No, I'm talking about mechanics who don't really know how to reassemble the auto inflate systems, and don't double check their work before sending you back on the road.

 

Can always unscrew the Lines from the hub and use a pressure gauge to determine the problem tire. Thats how i find out if i cant see or hear what tire is leaking.
How can i calibrate the system to 100psi? Anybody ever do it on their own? I have it off cause its apparently set for 70psi......which aint gonna work.