MG Car Repair: 1977 MGB Front Brake Problem, front brake caliper, mgb roadster

Question
My 1977 MGB roadster has a right front brake caliper that binds badly. This began when I replaced the brake master cylinder, hoses, and calipers. The right front caliper has been replaced twice with new due to a leak in the original replacement caliper. The brake lines are in good condition and are clear of any obstructions. I've swapped the brake hose with the left one and the problem continues. On the recommendation of another, the right wheel bearings have been replaced with new and properly shimmed. The binding doesn't happen immediately upon test driving the car. It only occurs after having driven the car for a time.

Answer
Hi Robert,
You need to separate weather the binding is mechanical or hydraulic. This is easy to determine. Just jack up the front of the car when it is dragging and try to rotate both wheels. Then open the bleeder valve on binding caliper. If the wheel frees up and it spins ok then. It is something in the line to that wheel if the other front wheel spins free all the time.(check from the joint in the steel line to the connection on the caliper)  If the wheel is still in a bind when the valve is opened then you need to look at the brake pads or the seals on the pistons in the caliper. Don't forget to check for wheel rotation with the pads out to be sure the wheel bearings are not the cause.
Howard