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Harry Ferguson Tractors Discussion Forum
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TO-35 Front Wheel Shimmy

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maxwell99

05-09-2008 09:49:27




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Old tractor will shimmy on the road. Have to slow down, very slow to stop the shimmy or keep turning the steering wheel back and forth as I drive down the road. No problems in the field.

Have tighten the gear box as much as I can as the gears are worn, check steering gearbox oil.

Someone mentioned that you could tow out the front wheels a bit, that would help with the shimmy problem.

At least I think is was tow out, could have been tow in the front wheels.

Has anyone tried the tow in/out to see if it would help with the shimmy problem.

Thanks for your replys,

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John (UK)

05-11-2008 07:33:09




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 Re: TO-35 Front Wheel Shimmy in reply to maxwell99, 05-09-2008 09:49:27  
Look at the front axle pivot Pin and Bush underneath the Radiator, if it is worn this allows the axle to tip and the wheels move back, this alters the castor angle of the steering and it will cause the wheels to shimmy just like you say. The TE series and the TO20/30 are more prone to this kind of thing though. Make sure that the toe-in is correct when you have repaired the Pin and Bush, is should be 1/8". The usual give-away that the Pin and Bush is worn is that the Radius Rods bend upwards in the middle, but it will shimmy if the bolts through the axle beam and the Radius Rods are slack or worn.If you do have to replace the Pin and Bush, use two bushes instead of the one that was originally fitted, one from each side of the Centre Beam..John

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maxwell99

05-11-2008 17:23:14




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 Re: TO-35 Front Wheel Shimmy in reply to John (UK), 05-11-2008 07:33:09  
good tips,
I have replaced the axle pivot bearing.
check the bolts through the axle beam and the Radius Rods. (good)

I think most of my problem is the steer box gears are worn in the area when tractor tires are pointed forward. I cannot adjust the gears any tighter as they are too tight when I turn.

Now the tractor drives great on the road with a bit of toe out. Will check psi in front tires and be sure it is correct.

Thanks again for your replys.

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Brian Allen

05-15-2008 17:25:28




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 Re: TO-35 Front Wheel Shimmy in reply to maxwell99, 05-11-2008 17:23:14  
The parts are available to rebuild the steering box$$$$$$$$, however you might be better off to try a to pick up a good used box.
Good luck
Brian



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John (UK)

05-12-2008 11:42:20




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 Re: TO-35 Front Wheel Shimmy in reply to maxwell99, 05-11-2008 17:23:14  
Is it the gears in the steering box or the nut on the steering shaft? Is there any lift in the steering shaft, there should not be any lift unless it has power steering....John



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maxwell99

05-12-2008 18:16:41




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 Re: TO-35 Front Wheel Shimmy in reply to John (UK), 05-12-2008 11:42:20  
John, Thanks for your interest!

No up/down play in steering wheel shaft. Steering wheel has about 1" of back/forth play when front tires are in the staight forward position.

All steering box shaft nuts are tight, I have adjusted the tension or adjusting screws as far in as possible. I jacked the front end of tractor off ground, and turned steering wheel lock to lock, at the ends of full left or right turn the steering box was starting to get tight. So I back adjustement off 1/8th turn.

My problem is the steering box gears are worn in the center where front tires are in the straight forward position. Old tractor has been well care for, but has a lot of hours of use.

I read the toe out tip to stop front wheel shimmy some time ago on another forum, but had never had to try it.

It works great as little tractor now drives fine on the blacktop with no shimmy.

Thanks again,

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John (UK)

05-13-2008 10:57:57




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 Re: TO-35 Front Wheel Shimmy in reply to maxwell99, 05-12-2008 18:16:41  
Seems like you have done all you can at the moment, next step will be to tear the box down sometime, but as long as it is workable..John



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Brian Allen

05-11-2008 06:43:31




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 Re: TO-35 Front Wheel Shimmy in reply to maxwell99, 05-09-2008 09:49:27  
Use the beer can/broomstick method.
You place the cans beside the inside of both wheels and place the broom sticks on top.
When you measure (at the front and rear edge of the wheels)you should have 1/8" to 1/4" toe in (less at the front). At this setting you should not have any problems.
Drink the beer when you are finished.
Do not drink and drive.
Be tractor safe
Brian



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Richard L

05-09-2008 12:20:41




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 Re: TO-35 Front Wheel Shimmy in reply to maxwell99, 05-09-2008 09:49:27  
I had an older Ford Van years ago and it would shimmy, I had to get on brakes hard to stay in my own lane. Thought I should it get fixed, the bearings got replaced no more shimmy. Check bearings and bushings, or stay in the field. LOL Richard



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maxwell99

05-09-2008 14:09:34




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 Re: TO-35 Front Wheel Shimmy in reply to Richard L, 05-09-2008 12:20:41  
you are right should just stay around the house so when it quits running I can drag it back to the shop, that would also stop the shimmy.

Will I adjusted the tow out one round on each steering rod (rod from gearbox out to wheel)

Old tractor does not shimmy any more and I can not tell any difference in driving it.

May wear tires a little more but they are rotten anyway and need to be replaced.

thanks for the reply,

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Richard L

05-09-2008 15:26:11




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 Re: TO-35 Front Wheel Shimmy in reply to maxwell99, 05-09-2008 14:09:34  
That's great, very inexpensive repair. Richard



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