Join Date: Sep 2020
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Toro 20065 not selfpropelling
This 2007 Toro mower works well but the self propel mechanism is not working. I have done a lot of work on it. New belt, new transmission and numerous adjustments on the traction cable to no avail. Pulley is fine. When I engage the transmission with the lever, both front wheels rotate slowly but I can easily stop them by grabbing on to them and yet the axle continues to spin rapidly. I then removed the wheels and the pinion gear rotates but again I can grab on to the pinion gear and stop it and view the axle which continues to spin rapidly despite my stopping the pinion gear from rotating. The wheels rotate easily when the motor is not on, suggesting the wheel bearings are fine. The plastic gears on the inside of the wheels do not seem worn and again the problem remains when I have the wheels off and can manually stop the pinion gear. The pinion gears are not visibly worn.
Basically when the transmission is engaged, the front wheels turn slightly when off the ground but stop when they hit the ground and hence do not propel the mower.! I do wonder about the key and spring on the transaxle under the pinion gear. I tried replacing the keys but presently do not have access to new springs. Or could it be a worn pinion gear that is not visibly worn.
Thanks for any suggestions.