That forum discussion linked to by Barney should if nothing else illustrate that while the basic principles of weight distribution are haven't changed over the years each type of weight distribution system does have it's own requirements for proper setup and operation. Having set up many different types of WD systems myself I'd suggest the OP's first step would be to identify just what type of WD system he has, then refer to the correct installation & set up instructions for that particular type of system, otherwise he'll just be guessing.
