Recently purchased an International diesel backhoe. I am not exactly sure of the model. 2400a/240a? No service manual. Purchased one but it wasnt a match. When I bought the backhoe, engine worked fine, started right up. It needed new brakes and mastercylinder and valves. Afterwards the right brake dragged and locked up. Thought maybe I didnt get all the air bled out. Sent it out to have someone else check it. He has the brakes to where it drives just fine but as soon as it drives down the road a ways and we tap the brakes more than twice BOTH brakes start dragging and lock up. If I bleed the air off it the brakes work just fine until I tap them more than 2 times and I can feel it locking up again and dragging. Does anyone know the solution?