Tractor jumps no matter how slowly clutch is released

esemilio(Z5 WI)July 26, 2010

I have an older sears LT10 with a 3 speed peerless transmission. The problem I have is that no matter how slowly I release the clutch, the tractor jumps/jerks, front wheels jump off the ground; it does it in each gear-worst on the high gear. I always had this problem but it appears to have gotten worse.

Any suggestions on how to resolve would be welcomed!



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A sticking brake will do this. By the time the torque overcomes the brake, there is enough there when it does release to pop wheelies...

    Bookmark   July 26, 2010 at 11:58PM
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My old LT 1000 does that but it disappears after just a short use.
I wrote it off as a old worn, cracked drive belt.
The brake barely works on this old timer.
It's worth watching when the wife uses it..(I'am bad)

    Bookmark   July 27, 2010 at 3:34AM
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mrtractor(SE USA)

Wow, I'm impressed. If it is the same LT 10 I had with a Peerless 3 speed tranny and chain drive to a differential, your machine is still going after 30 years.

Tom is right about the brakes, I hope that helped. Another problem especially with older machines can be the condition of the pulley's and idlers, especially the engine pulley. The belt has to slip to a degree in that pulley in order to disengage the belt. Rust or wear in the pulley, or a badly worn belt where the clutching cover is exposed and the rubber is coming through to much, etc. may cause clutching to deteriorate. Other than new parts I've seen a little dry graphite slick things up and provide at least a temporary solution. You can buy it in a squirt can, often used to lubricate locks. Get it on the belt and pulleys and you will see a difference. Good luck.

    Bookmark   July 27, 2010 at 8:50AM
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esemilio(Z5 WI)

tomplum -It is not the brake.
dynamike59-my belt is >15yrs maybe?
mrtractors- my LT10 is from the mid 70's; (it does not have a separate differential); it has the original 11HP briggs engine, does not burn oil and even though it has been abused, it has been virtually trouble free. I use it now mainly with the snowthrover attachment. I stopped regularly using the cutting deck because it cannot mulch and there is no bagger available - I have a lot of leaves in the fall.

I will try the graphite.

    Bookmark   July 27, 2010 at 10:45AM
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esemilio(Z5 WI)

mrtractor - I did not have graphite spray but I did have silicone lubricant spray. I sprayed the belt while idleing in neutral and it worked like a charm!


    Bookmark   July 27, 2010 at 6:49PM
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Let us know when it starts to slip ;) !!!

    Bookmark   July 28, 2010 at 4:06PM
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horsepen40(7a (N. Georgia))

And when you replace the belt, try to get a "wrapped" belt rather than a "raw edge" belt. Wrapped belts have better clutching action while raw edge belts tend to grip much quicker and have lots less clutching action. It's possible your belt is old enough to have worn the fabric wrapping off as someone stated above.

    Bookmark   July 31, 2010 at 12:26PM
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Good advice horsepen.

Wrapped belts are good for more horsepower. They are often referred to as OPE belts. The rubbers ones from the hardware store are for "fractional horsepower" applications though they will sometime work in a pinch (while you wait to the OPE belt to arrive).

    Bookmark   July 31, 2010 at 6:58PM
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