I bought a HW345. Mowing hay with it, noticed the head doesn’t follow the ground very well, it doesn’t seem to have any spring in it. My guess is the accumulators are discharged or bad. Any chance they would just need to be recharged or do they usually go bad? What pressure should they be charged to? They appear to be serviceable but I don’t see that new holland offers a bladder kit and haven’t found a real manufacturer or part number on them.