Horizon Fitness T401 Treadmill Horizon Fitness October 05, 2021 20:26 For the 2009 Horizon Fitness T401 Owner's Guide, please click here. For the 2009 Horizon Fitness T401 Exploded Diagram, please click here. Was this article helpful? Yes No 0 out of 0 found this helpful Have more questions? Submit a request Related articles How to Fix a Treadmill that is Stopping and Starting How to Replace the Running Belt and Deck on a Treadmill. What are the Maximum User Weight for Treadmills? Treadmill Pre-Set Programs Horizon Fitness GS950T Treadmill Comments 0 comments Please sign in to leave a comment.