Porkchop, The seat switch was driving me crazy also. My Farmall 65A has 83 hours on it now and the alarm did not go off yesterday or today at all. I think the seat needed to be broken in with use. This winter it usually went off early in its use and then stopped tripping. That made me think cold weather equals a stiff seat springs? As weather warmed up and some use the alarm is not tripping as much and again for 2 days now completely silent.