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Farmall & IHC Tractors Discussion Forum
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Front End Shimmy

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Ted

02-23-2004 07:56:34




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I am looking for some advice on a front end shimmy on my Super M. Even at medium speeds on the road (5th) gear, the front end shimmys very bad on my one tractor. All but one of my tractors have narrow fronts which I prefere when really using a tractor- not to get into the wide vs narrow controversy, but my other tractors don't shimmy nearly as bad unless you go really fast at a speed you should not be going. The steering "play" doesn't seem excessive compared to others. Does anyone have experience with this problem? Thank you in advance.

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john d

02-23-2004 18:43:30




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 Re: Front End Shimmy in reply to Ted, 02-23-2004 07:56:34  
All good advice so far. I suggest taking the hood off and going for a drive. Watch the front portion of the steering shaft to see if it moves more than the end attached to the steering wheel. If it does, check out the universal joint and bearing near rear of the engine.
The little thrust bearing at the front of the steering shaft is also a common culprit. They are realtively inexpensive and easy to change. That bearing often has excessive wear if the tractor has been doing loader work.

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PeteNY

02-23-2004 18:09:58




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 Re: Front End Shimmy in reply to Ted, 02-23-2004 07:56:34  
Ted, Our SH was l9ike that...foumd that the thrust bearings in the bolster were bad...allowing thw shift to move up, thus loosening everything up. Pete



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Tom

02-23-2004 10:07:32




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 Re: Front End Shimmy in reply to Ted, 02-23-2004 07:56:34  
Ted, our SMTA had an excessive shimmy when we purchased it. We did two things and the shimmy has ceased. 1) We were able to reposition the gear (driven gear - not the worm drive gear) at the top of the pedestal to provide a new mating surface, and 2) we installed a shimmy plate. Check the archives - there are plenty of posts on this subject. Keep us posted. Tom



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bermuda ken

02-23-2004 09:43:34




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 Re: Front End Shimmy in reply to Ted, 02-23-2004 07:56:34  
Besides following the advice given by the other posters here, check to see that both front tires are matched for size, name brand, wear and tire air pressure. This can make em shake too!



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FARMALLSM

02-23-2004 08:26:16




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 Re: Front End Shimmy in reply to Ted, 02-23-2004 07:56:34  
JACK UP FRONT OF TRACTOR CHECK FRONT WHEEL FOR MOVEMENT. I'LL BET IT'S YOUR FRONT WHEEL BEARINGS



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RB

02-23-2004 08:07:52




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 Re: Front End Shimmy in reply to Ted, 02-23-2004 07:56:34  
Anything that is worn can cause the shimmy. Some of the simpler things to do are; Check for any loose joints in the steering shaft, check the front plug for being loose and the brg. The nut that holds the worm gear may be loose. The worm gear can be removed and rotated 1/2 turn to make use of teeth that have no wear. The worst senario is to pull the bolster out, have it built up and replace the bushings.

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Aces

02-23-2004 08:07:12




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 Re: Front End Shimmy in reply to Ted, 02-23-2004 07:56:34  
Ted you need to check everything in the front end. Could be bearing on warm shaft could be warm on the shaft could be warm gear teeth bushings on bolster shaft splines on bolster and warm not tight. If you have a little play in each place they will shimmy.



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Joe Evans

02-23-2004 08:05:08




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 Re: Front End Shimmy in reply to Ted, 02-23-2004 07:56:34  
My Dad's H shimmied like a go-go dancer. Most of the shimmy was corrected by drilling and roll-pinning where the steering shaft enters the steering shaft u-joint. This took out quite a bit of play but not all.



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Dave S

02-23-2004 10:50:02




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 Re: Re: Front End Shimmy in reply to Joe Evans, 02-23-2004 08:05:08  
Does anyone know where the shimmy plates can be bought new.



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