Toro model 20054 21" 6.75HP the rear wheels will not turn when engaged. belt and pulley cannot turn but the blade is

SOURCE: Toro 22in Lawn mower. Loud gear noise when try to engage drive.

Problem is in the rear pinion gears on rear axle and the design of the axle itself. I have a 2005 model 20041 had the same problem. I found a Toro dealer that had the fix.The problem is creadted by the fact that there is too much "play" in the rear axle. You have to limit that play by installing shims, or washers First, but the 2 new rear pinion gears for the rear axle. While you're at it, you may as well buy 2 new rear wheels because the "grinding" has worn the sprockets on the reas r wheels.Next, get 2 "fender washers", 1/2" ID and about 1" OD. I found it easier to turn the mower over and set it on saw horses to work on it.( drain the gas and oil first). Remove both rear wheels, pinion gears and all the washers etc. (caution - keep all parts from one side together - do not pile all parts together - keep them seperated by wheel - the reason is I believe there is one more washer/shim on the right side than on the left). Now to put everything back together, find a spot on the axle where the washer will fit in between the standard stuff.Install new pinion gears and replace the rest of the washers/shims just as they came off. INstall new wheels and you'll be good as new!

SOURCE: Toro model 20038 self propel problem

Try taking the back wheels off and lubricating the joint cogs and wheels with ,say, 3 in 1 oil . The dealer recommended doing this once every couple of years as preventative maintenance when I bought mine , and it has solved sticking problems for me .

SOURCE: I have Toro Wheel Horse riding lawnmower model # 70040 - 790000

need the ser number of the unit. the pulley don't split its one part, i need the ser number . this is no easy job. good luck

SOURCE: front drive wheels won't engage

Is it possible that the belt has either broken or come off the pulleys? Next step would be to remove the cover and see if there is something preventing engagement or if you see any broken parts. May even be as simple as lubricating the cable/levers.

SOURCE: my toro front wheel drive is not engaging when i

yes...tightening the belt happens when the handle is pulled...take the cover off the belt an see if there is play in the pulley on top of the transmission...if there is the trans is bad and must be replaced...