I have a Toro Timecutter MX5060. I just had the transaxle oil and filter changed. I was going to do it myself but medical issues suggested I better just let a shop do it. When I got home I was adding a little more oil to the reservoir to bring it to the Cold line and then I'd purge. I disconnected the switch under the seat so I wouldn't have to get on and off while purging the trans. I was trying to free up the bypass lever on one side. [I've had this issue before]. When I pushed in the right side control arm (me not sitting in the seat) the engine shuts off even with the seat switch disconnected. I don't understand that -- by disconnecting that switch shouldn't I be able to push the control arm in and the engine still run?