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Allis Chalmers Discussion Forum

Gemmer/Ross steering box

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Author  [Modern View]

09-28-2010 12:13:09

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I have not been able to find new bearings for my 41 B Gemmer steering box. I was wondering if it is possible to swap a Gemmer steering assembly with a Ross assembly. I have two good Ross steering boxes. Any ideas or help would be appreciated.

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Jerry Coulter

09-28-2010 15:26:12

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 Re: Gemmer/Ross steering box in reply to RalphL, 09-28-2010 12:13:09  
I found the Timken 5BC bearings (AC#207802) readily available through my local auto parts store. And quite cheap. Hope you don't need the thick cup, it is very expensive.

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09-29-2010 04:35:15

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 Re: Gemmer/Ross steering box in reply to Jerry Coulter, 09-28-2010 15:26:12  
Hi Jerry , thanks for the reply. The bearings you mentioned are the round steel balls without a bearing cup? I have 1 good cup and the other one is rusted beyond salvage condition. I need 1 cup and enough steely"s to fill 2 cups. I think each cup need 12 steely"s. Next question, are the upper and lower cups the same?

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Dick L

09-29-2010 06:51:46

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 Re: Gemmer/Ross steering box in reply to RalphL, 09-29-2010 04:35:15  
Can you take a picture or two of the beariings. I have not run across a Gemmer with round ball bearings. The Gemmers I have worked on have a tapered roller bearing. All the Ross's that I have worked on had round ball bearings.

third party image

The Gemmer below takes a different cup at the top than it does at the bottom.

third party image

third party image

third party image

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09-30-2010 11:54:27

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 Re: Gemmer/Ross steering box in reply to Dick L, 09-29-2010 06:51:46  
Here are a couple of pics of the Gemmer I would like to install on my 41 B. The original steering box was a Ross. Am I going to have problems swapping the Ross with a Gemmer? Are the steering shaft tubes the same length? I would have rather put the Ross steering box back on but one of the bearing cups is rusted beyond salvage.

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Dick L

09-30-2010 13:11:37

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 Re: Gemmer/Ross steering box in reply to RalphL, 09-30-2010 11:54:27  
If the Gemmer you have was manufactured for an Allis B, C, or CA it will bolt in fine as all torque tubes were the same as far as how the steering box bolts fast. It the Gemmer you have was for a C or CA then the cross shaft would be larger would turn the oposit way you turned the steering wheel. The small end would not have the ball on the end and the splines would be larger and machined different. The shaft would also be longer but probably would not be a problem in it self.

If it was made for a B you would not have a problem.

I will wait for your pictures.

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Jerry Coulter

09-29-2010 05:24:13

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 Re: Gemmer/Ross steering box in reply to RalphL, 09-29-2010 04:35:15  
The Gemmer gear takes the Timken 5BC bearings, lower cup is 6A, the upper cup is 7A. I think the 7A last time I checked was over $100!!

The Ross gear takes 20 or 24 of the 5/16" steel balls, both cups are the same. AC part # 210467 on the B and 219383 on the C. This is from a 1958 parts book and the numbers may have been superceded over time.

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09-28-2010 15:11:30

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 Re: Gemmer/Ross steering box in reply to RalphL, 09-28-2010 12:13:09  
turn the input shaft and see what direction the output moves. if the same, yes, you an interchange them... cant put a B on a C or a C on a B... they turn opposite directions.. but the B used both Ross and Gemmer.. internal will not interchange parts... you can buy the ball bearings individually at local hardware store ??

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09-29-2010 04:39:29

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 Re: Gemmer/Ross steering box in reply to steve(ill), 09-28-2010 15:11:30  
Thanks for the reply. I will give them the test today. If it works out I'll be able to exchange the boxes and get this thing finished. Then I can finish getting the parts I need for the Gemmer box.

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Jeff Z.

09-28-2010 14:19:29

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 Re: Gemmer/Ross steering box in reply to RalphL, 09-28-2010 12:13:09  
Send me an email for info.

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