That looks exactly like the MTD Yard Man tracked I used to have, except for the console and wheels. But looking closely at the drive components, it appears as if MTD changed the trigger steer mechanism. The one I had was an approx. 5 year newer design, pictured here: http://c.searspartsdirect.com/lis_png/PLDM/1111147P-00006.png
The dogs (23,36) locked 47 in place so the driveshaft turned 46. Pulling the trigger(s) raised the dog(s) and allowed that side to freewheel. The driveshaft was powered by the chain on 49 and the track powered by the chains on 46. Trouts is correct about how easy these are to move and steer. Effortless when running, and still very easy when off. Pull both triggers and push, for turning/swiveling lean down on the handlebar to raise the front of the track. My only complaints after several years were the thinness of the bucket (and the paint job on it), and the light. Replaced the light for $10 and it was great. A really nice system, one that I am surprised wasn't copied by other manufacturers.
Who the hell let all the morning people run things?
