I've worked on cars and trucks a lot, but not much on lawnmowers. I am fixing up an old Cub Cadet LT1046, and I drained and re-filled the transaxle. I didn't know about needing to purge the air until I talked to my small engine mechanic friend. I've searched for the location of the bypass valve online, but couldn't find anything. It isn't shown in any of the diagrams I found, or even in the service manual that describes how to do the purging.
Any help would be appreciated.