Air Valve Between Rear Duals

[chessie4905]

on those valves, you will install plugs in unneeded ports once you receive the correct one. Use your old one to know which ones aren't used.

[buswarrior]

The hose sizes, diameter, lengths, elbows, fittings, adapters, every last bit of the brake plumbing was selected to achieve the desired brake application timing and graduated strength.

Previous owners must be regarded with great suspicion, that they didn't change something from stock configuration, and the current busnut must guard against the urge to break out the coffee can of brass adapters to just make the damned thing fit...

If it has been messed with, the brakes will not apply as intended originally. Front, rear or side to side will not apply at the same time, or will not apply with the intended effort at each wheel.

Frustrating, but confirming and achieving equal and balanced braking is a worthy pursuit.

Happy coaching!
Buswarrior