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Can anyone please provide me with a schematic of an air-over-hydraulic trailer brake system? Something basic - non ABS - just what's required to get me up to code for a pre ABS trailer (built and titled in 1965). I found a few brake kits online, however they seem quite expensive. The few...

I appreciate the warning about not taking the air chamber apart. I don't like the idea of snapping a bone from an uncontrolled coil spring letting go. . . . If I do anything, I would simply replace the can. Nonetheless, my main concern is figuring out how the darn air brakes work, and to...

I have not attempted to cross the lines yet. The truck is already put away for the evening. I will attempt it tomorrow. It seems crazy to me that the prior owner would hook the red to blue, and blue to red - for decades of trailer use - in lieu of simply swapping hoses for proper color coding...

I'm a little confused. Please forgive my lack on knowledge on is subject, but what does it mean when you say that the spring brake is caged? Note that my trailer rolls freely when completely disconnected from air. There is no default spring engagement of the brakes when air is lost. The air...

Here's another round of pictures. The master cylinder is more clear. You can also see where the service hose is connected to the emergency port on the air-chamber. I'm trying to figure out how this system "should" work. It appears to be a differential system. Where the emergency air is always...

Ok, files are directly attached. The trailer brakes are not spring brakes. They are air-over- hydraulic. The trailer has no air tank, air valve, or any other air components - just the air-chamber shown (picture from above, and below). The air chamber is connected directly to a hydraulic master...

I just went out and took another look at the air-chamber (shown here) http://i1192.photobucket.com/albums/...psee61eea8.jpg It appears that the red hose is threaded into the service port, and the blue hose is threaded into the emergency port. They are are crossed! Judging by the dirt, they've...

I picked up a 1965 Miller 12-ton tilt-bed trailer, and I need help troubleshooting the air brakes. Here’s a picture of my truck: http://i1192.photobucket.com/albums/aa337/Entropy428/IMG_0898.jpg Here’s a picture of the trailer...