Steering on SH's

Va Gasman · Jul 9, 2013

I have 2 SH's. The stge II will fly down the Hiway so fast I have to hold my hat on and no shimmy whatsoever. I had the gear box open last fall and everything looks good and greased. The reg SH when I open it up in 5th begins a shimmy. I read on here last fall about shimming with a beer can shim on the bolster. I pulled the top gear and shimmed the shaft. The gears look good. what else can I try other than slowing down on the hiway?
Thanks, Randy

David G · Jul 9, 2013

You really have to check all the parts, including bushings for wear.

Janicholson · Jul 9, 2013

Five primary issues.
Any out of balance or runout in the rims wheels tires.
Bolster bushing wear in the vertical shaft bushings.
Loose sector gear or worn sector/worm.
Bad worm ball bearing (or loose under the hex cap at the front of the gear box.
Loose Ujoint/or coupling key in the steering shaft from the wheel.
Jim

David G · Jul 9, 2013

Jim,

That is most of the parts.

sd pete · Jul 9, 2013

Run 1 front tire 5 lbs low. Its not a fix but might help.

LA in WI · Jul 9, 2013

Pete is right, but I had to deflate one tire way down to 15 psi and keep the other at 30 to get the shimmy to quit on my H.

New tires were the real fix. And now I put my cap on real tight! And grin a lot.
LA in WI

S2710 · Jul 9, 2013

If you have to put new bushings in check the shaft where the bushings go and if it is out of round turn the shaft a quarter turn and it will be much better and it will save you from buying a new shaft.

Bob

Janicholson · Jul 9, 2013

Just being verbose. Jim

burnsg2003 · Jul 9, 2013

I put in new worm gear and cam gear and changed the bolster
bushings still had some shimmy. My front tires were old and very cracked so I decided to put on new front tires this finally eliminated the shimmy.

DaninKansas · Jul 9, 2013

Lots of hours will effect the steering gears. About 95% of the time the tractor is going "straight" so most of the wear in the gears is taking place in the exact same spot while the rest of the wear area on the gears will be like new. Just a 1/8 turn and the steering is tight again but dead center its sloppy.

You see that on some of the older rack and pinion set ups on cars that are driven hard (like the 1980s & 90s Mustangs). The rack and pinion are worn out in that one specific spot while the rest of the rack is like new.

sd pete · Jul 9, 2013

I guessed on the amount of air to release.

mkirsch · Jul 9, 2013

If all else fails, before you go spending $500 on new gears, grind about .030" off the left side of the front steering shaft bearing, and shim it over to the left with a little piece of an old hose clamp (almost exactly .030") so that the worm meshes further into the worm gear.

GordoSD · Jul 9, 2013

Start at the front pedestal and check the shaft for wear and loose. Check the two collars that prevent fore and aft movement. Then keep following the steering down to the wheel bearings looking for play or looseness at any point.
Or start at the wheel bearings and go at it from both ends, steering wheel to front wheels/tires.

Steering on SH's

Va Gasman

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David G

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Janicholson

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David G

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sd pete

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LA in WI

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S2710

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Janicholson

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burnsg2003

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DaninKansas

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sd pete

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mkirsch

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GordoSD

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