I have a 1995 Massey 231 diesel problem is the steering has never worked very well even when new. Noticed fluid leaking from under steering wheel . Question is steering valve ( I don't know what else to call it if you are not familiar with this the steering wheel is attached directly to it )rebuild able or do I have to buy a new one or can I get a reman somewhere? Also is the power steering pump rebuild able or do I have to purchase a new one? Anyone know what pressure pump should be putting out? Thanks in advance Carl