Question about Toro Lawn Mower With Toro Power Tools

4 Answers

Automatic braking system no longer works...

I replaced both belts on my Toro LX500 riding mower. Now when going downhill the braking system tries to engage but it won't hold the mower back. The mower will run freely out of control downhill and make a quickly repeating "ratcheting noise". What did I do wrong?

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  • Gary Thompson Jun 04, 2009

    OK. It took me a couple of days but I finished up yesterday. 1st off there is no adjusting nut on the trans arm. The only adjustment is on the pulley assembly that tightens/loosens the drive belt. There was a lot of dirt and grease in the braking assembly but I cleaned that all up. It still does the same thing. Out of control braking under normal drive conditions. I didn't mention it last time but the brake pedal does work and I can slow it down that way but who wants to mow with your right leg in the air for about 2 hrs.?

  • Gary Thompson Jun 05, 2009

    Jimmy N,

    I'm not real sure about the belt tightness. They are the recommended belt/s. They seem to pull me OK but I question the effectiveness of the variable speed pulley both belts share. I don't know how to tell if it is working properly or not. I can tell you when I crawl under the mower the short(speed control)belt is tight and the power transfer belt(from motor to transmission) is loose even though it has a spring loaded idler pulley. Does this make sense to you? Shouldn't that drive belt be tight also, even if the variable speed pulley is open as far as possible?


  • Gary Thompson Jun 06, 2009

    You'll have to hold on a few days. The belt is new and my only option is to purchase a different belt,which around here is a little bit of an ordeal. I'll get back to you.

  • Gary Thompson Jun 06, 2009

    You'll have to hold on a few days. The belt is new and my only option
    is to purchase a different belt,which around here is a little bit of an
    ordeal. I'll get back to you.

  • Gary Thompson Jun 30, 2009

    I discovered the brand new belt had already cracked at the slice,only 5 wks old,and was some of the problem. I finally found the adjusting nut for the trans linkage(sorry)and after a couple of trial and error adjustments it is much better. Thanks for your help. I'm very disappointed in this mower and Toro's response to the belt breakdown in such a short time. Based on this experience,I'll purchase from a different manufacturer next time. They were no help what so ever!

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Hi there,

Do adjusting the nut on the tranny brake arm. Tightening it increases break pressure.

  1. Remove the entire assembly from the tranny.
  2. Check the brake pucks/pads, and clean the pivot pins and pin holes with a wirebrush and steel wool making sure all the parts are clean and move freely.
  • You can use a small drill bit and put some steel wool on the end of the bit and run it through the pin holes to clean the inside of the holes.

Reassemble it again.

Let me know

Posted on Jun 01, 2009

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Hi sir
put grease on pulley and try...then friction is reduced


thank u.......

Posted on Jun 07, 2009

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Drive belt should be tight - as the variable part is the spring on the pulley.
normal deflection for the belt should be about 1/4"

Thanks!

Posted on Jun 06, 2009

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  • 132 Answers

Is the drive belt tight?if it is not gight enough it will slip and let the mower run free but if its tight the gears wont let it spin faster than its going. if the belt is tight that means your gears are slipping and that can make a grinding noise also

Posted on Jun 05, 2009

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