tbran is right Tim, you should try adjusting first. look under the dust cover near its outside edge, there should be a locking bracket. You will need a 7_16 wrench to loosen the nut enough so you can turn the adjusting plate counter-clock wise. Use a blunt chisel or punch with a hammer to drive the adjusting plate counter-clockwise. There are notches on the plate for you to put your punch. You should tighten your clutch so that when you engage the clutch from the cab it will POP into engagement position. If you can't get it to this adjustment, it probably has built-up dirt inside the clutch.(Most old combines do) You will need to get all of the packed dirt out of the clutch pack that you can. I use an air blower with as much pressure as I can get. Try the adjustment before you replace. Check back here.