Jacob-
Welcome to WFM. This place is a wealth of knowledge when it comes to John Deere lawn mowers and garden tractors. Here is a link to another thread about the same topic. It is for a 317 but the 140 and 317 used the same 3 pt so this should get you headed in the right direction.
http://www.wfmachines.com/discus/messages/17/221860.html?1386046395
Welcome to WFM. This place is a wealth of knowledge when it comes to John Deere lawn mowers and garden tractors. Here is a link to another thread about the same topic. It is for a 317 but the 140 and 317 used the same 3 pt so this should get you headed in the right direction.
http://www.wfmachines.com/discus/messages/17/221860.html?1386046395