I have two Tsp 7000 units at my current facility. Since they were installed two years ago, I have had to work on the pivot mechanism on average every 1-2 weeks due to the master links breaking or the chain itself. I have had the regional dealer in here to trouble shoot this problem to no avail, as well as a factory engineer. They created and update for the software based on what they found on my machines. Operator error only accounts for roughly one quarter of these breaks due to the fact we have cameras in every aisle. Crown can not give me a strait answer. They have also stopped honoring the warranty based on this problem. We also have 3 TS40's with no similar problem. Has anyone else experienced this issue?