I have a C model that uses the same plow. Mine works great. Does yours have the coulter on it? Is it possible that you might have the wrong linkage for the depth adjuster? The plow set up for the b and the c is basically the same accept the drag bar for the plow on the c is wider. The depth adjuster is the same. If you would like me to send you a picture of it let me know. firstname.lastname@example.org.