Horizon Fitness DT850 Treadmill Horizon Fitness Updated September 16, 2021 17:32 For the 2006 Horizon Fitness DT850 Owner's Guide, please click here. For the 2006 Horizon Fitness DT850 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 Replace the Running Belt and Deck on a Treadmill. Horizon Fitness DT650 Treadmill How Do I Lubricate My Treadmill? How Can I Adjust the Volume of Machine Beeping? Horizon Fitness Elite T9 Treadmill Comments 0 comments Please sign in to leave a comment.