I bought new aftermarket wheel cylinders for my 2004 3010 4wd. Mule. I really was wondering how the fronts are adjusted. Well today I figured it out one of new cylinders where the steel line screws in wasn’t good. One of the old cylinders was still in pretty good shape. So I took it apart and decided to put the guts Out of the new one in the old casting. Well guess what the old cylinder has a screw out between the pistons That acts like an adjuster. The new ones don’t have this feature. So beware of the aftermarket cylinders. I put the new rubbers on the old pistons and reassembled it. Guess we will see what happens.