Engine runs hard then locks up Forum › Forums › Tractor Troubleshooting › Engine runs hard then locks up This topic has 1 reply, 2 voices, and was last updated 14 years, 3 months ago by circleg. Viewing 0 reply threads Author Posts November 12, 2011 at 11:45 am #33671 circlegParticipant Offline Sounds like you have a bad quick coupler or one that is not completely coupled, try uncoupling and recouple it and see how it does. http://www.circlegtractorparts.com Phillip Gooch Author Posts Viewing 0 reply threads You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In