I had a Lawn sales and service shop years ago, the Toro 11-32 Rear Engine Rider was the biggest seller, that was a fine quality mower, there was an I Idler from the engine to the mower deck, when you would lift up on that flat strap and put it in the upper notch it was in the grass cutting stage, when you released it the two spring on the out side of the mower straps that would tighten the break pad against the pulley on the mower deck, so the spindle would not turn, I will look to see if I still have the service manual or if you need parts and am scraping two of them now.