jbarron

I recently purchased a used Kuhn CF-50 air hammer. It was not running and had no dies at the time. Upon setting it up in my shop and installing the dies, the hammer hits fine but stays at the lower end of the stroke fluttering up and down when I back off on the treadle. The owner's manual lists only 2 valves to adjust . I have loosened and tightened the regulating valve with no effect on this problem. The directions on the setting of the control valve do not match the accompaning illustration. My valve is set to the written directions, and I am hesitant to change it as it is physically impossible to completely match the illustration. There are 2 blocks locking onto 2 shafts that are connected by a rod. The directions call for one to be parrallel to the body and the other indexes to a mark on it's shaft. Setting it this way causes the second block to be about 20 degrees out of parrallel yet the picture shows them both parrallel. I would sure appreciate advice from anyone familiar with this machine. Thanks, John Barron 530-333-1129