Gary, have you tried bleeding the system? Has it been jerky at all coming up?
Park it nose down a slope or into a small ditch (be careful, because you need to do it with the engine running, a driver to hold the brakes is a good idea), use an allen key to loosen the set screw on the top of the hydraulic pump(DO NOT REMOVE). You could see air bubbles, followed by oil.
Try this and see if it helps.