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Hot!MOWER WONT MOVE

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tiger041988
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2019/08/25 14:16:35 (permalink)
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MOWER WONT MOVE

Toro LX460 CVT transmission

Was mowing the lawn the other day when the “go” pedal seemed to pop and went all the way to forward. Upon inspection I could see that when engage the pedal the drive belt would tension but when it made contact with the spinning engine shaft pulley it would only smoke and squeal.

I chalked it up to an old worn out belt. I ordered a new lower drive belt (the one that runs from the engine pulley to the variable speed pulley on the rear axle) and a upper drive belt (the smaller belt that is routed above the rear axle.) After some bloody knuckles, spilt beer, and cussing, I removed & replaced the belts without issue. Everything is back together and....same issue. The lower drive belt definitely seems tighter through what I can feel when pressing the pedal but it is still smoking and squealing when it makes contact with the spinning engine pulley.

I am mechanically inclined enough to make whatever repairs are necessary I am just not great at diagnosing what the issue is. I had a tough time finding anything in regards to this same issue across the interwebs. I’m hoping it’s something simple that I can dig into. I’m kind of thinking it might have to do with that variable speed pulley...any and all information is greatly appreciated. Thank you.

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    MaxsGarajMahal
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    Re: MOWER WONT MOVE 2019/08/25 14:33:51 (permalink)
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    Sounds as though you need to oil the variable pulley.
    tiger041988
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    Re: MOWER WONT MOVE 2019/08/25 14:57:23 (permalink)
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    Thank you. Couple questions.

    1) When I had it removed I noticed the the “disc” in the middle had play in it; I was able to move it up and down maybe about 1/4”. Is this normal?

    2) How does the variable speed pulley come into play with the symptoms that I am having. I am just trying to get a better grasp of how it works.

    3) how do I go about oiling it?
    tiger041988
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    Re: MOWER WONT MOVE 2019/08/25 15:35:04 (permalink)
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    Disassembled VSP.

    One of the bearings was missing half the balls and one was imploded. I think I’ll start with replacing the bearings
    post edited by tiger041988 - 2019/08/25 15:43:41
    AVB
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    Re: MOWER WONT MOVE 2019/08/25 17:22:47 (permalink)
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    tiger041988
    Disassembled VSP.

    One of the bearings was missing half the balls and one was imploded. I think I’ll start with replacing the bearings



    6203-2RS
    tiger041988
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    Re: MOWER WONT MOVE 2019/08/27 19:06:05 (permalink)
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    Update: She moves!

    But, it is noticeably slower than it was and it takes a lot more pressure, a lot more, to press the go pedal. I assume that is due to the fresh belt but how do I go about getting it back to full speed? I’m thinking it might have something to do with the belt tensioner?
    AVB
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    Re: MOWER WONT MOVE 2019/08/27 19:48:10 (permalink)
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    Either got something assemble wrong and it is the same auto drive setup as MTD mowers. or you have the wrong belts. Check the belt lengths. Primary 5/8 x 90.5 - 90.8; Secondary 5/8 x 41.5 - 42.
     
    But I am suspecting more likely of an assembly error.
    tiger041988
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    Re: MOWER WONT MOVE 2019/08/27 22:28:26 (permalink)
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    I checked the belts against the ones I removed and they matched up. I’ll double check the assembly tomorrow.
    tiger041988
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    Re: MOWER WONT MOVE 2019/09/05 21:02:59 (permalink)
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    UPDATE: I checked the routing of both drive belts. Everything is good. I adjusted the lower drive belt tensioner, all the way in, middle, all the way out. No change in the speed. Only difference I noticed is the pressure needed to press the pedal.

    Upon looking at the VSP I saw it was shiny on the top and bottom. So I’m thinking maybe the new belt that I installed is a little taller than the OEM belt and was restricting the belt travel. So, now that I’m good at this, I removed the belts and installed the original belts. Test ran and it seems maybe a litttttttllllleeeee bit faster but still not as fast as I remember.

    Disclaimer- I haven’t drove this thing in almost a month and in the interim I have mowed my Dads lawn with his very fast mower 3 times. So maybe I am misremembering how fast this thing actually is in comparison to my Dads.

    Anyway, I adjusted the belt tensioner out, middle, and all the way in with the original belts installed and test ran in all settings. Still doesn’t seem right.

    Anything I should be looking at? Getting ready to set this thing on fire and cover my lawn in asphalt.
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