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Farmall & IHC Tractors Discussion Forum
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H Bolster steering gear.

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GordoSD

04-19-2007 16:40:53




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I removed the upper gear on the H as it has some play in there, between it and the worm gear. I could see the wear pattern on the flat gear Only the middle six teeth. I mic'd the worn teeth against the end teeth which are perfect.
.1230 vs .1610 so 38 thousanths of an inch worn off. How much is too much? Any tool and die makers out there. I know there are SAE engineering specs on gear fit and bevel etc, but I don't know where they are. Anyone got one a lot worse than this? It looks like I could gain a little if I flipped it, as the wear seems to be toward the bottom of the teeth. Gordo

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john cub owner

04-19-2007 19:49:22




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 Re: H Bolster steering gear. in reply to GordoSD, 04-19-2007 16:40:53  
It is pretty easy to find good used ones in the 30 to 40 dollar range. I got one for my H form www.jptractorslavage.com. Hardly had any wear in it at all. My problem wasn't worn teeth, the tractor had been run for many years with a model 31 loader and the splines were worn.



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MN Scott

04-19-2007 18:49:21




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 Re: H Bolster steering gear. in reply to GordoSD, 04-19-2007 16:40:53  
CNH still lists that gear for $243, Pn 50047DB. This site has aftermarket ones for about half that.



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GordoSD

04-19-2007 18:54:55




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 Re: H Bolster steering gear. in reply to MN Scott, 04-19-2007 18:49:21  
Number on this gear is 50038DA. Was it the wrong gear?

Gordo



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MN Scott

04-20-2007 10:19:40




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 Re: H Bolster steering gear. in reply to GordoSD, 04-19-2007 18:54:55  
CNH no longer makes the "half" gear. 50038DA has been superceded by 50047DB that is a round gear used in the Super H's 300 ect. It will work fine in your H.



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Nope

04-20-2007 09:38:55




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 Re: H Bolster steering gear. in reply to GordoSD, 04-19-2007 18:54:55  
My book shows 50038DA..19 tooth gear, 50038DB..33 tooth gear and 50047DB..worm.



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Gary Puckett

04-19-2007 18:48:01




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 Re: H Bolster steering gear. in reply to GordoSD, 04-19-2007 16:40:53  
I have been trying to remedy the same problem. Is yours the half-round or full-round gear? Are the bushings around the shaft worn? Even if you solve the gear tolerance and the bushings are bad, you will have the same problem. I do not see how milling some off the bottom will let the gear set in a lower position. Someone said that one could put a washer under the gear, but that will not work with a tapered shaft. Did you jack up the front of the tractor and check the tolerence in the shaft bushings?

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GordoSD

04-19-2007 19:14:59




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 Re: H Bolster steering gear. in reply to Gary Puckett, 04-19-2007 18:48:01  
Gary, The engineers at IH obviously tapered that shaft and gear so that it couldn't be 'adjusted' for end play. Why? Most likely that the entire assembly wouldn't be carried by the gear and nut, and 90% of the wear is from weight downward. This is the half round gear. Side wear accommodated by bushing replacement. Gear wear accommodated by replacing the gears. This H I plan to use solely for show and parades, therefore hi-speed transit to and from is desired. I did consider the welding and fileing. I can do that for a lot less than 150.00! Glenster...get that guy going on these gears. Get a quote. We'll get Cowman to market them
Gordo

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GordoSD

04-19-2007 19:12:40




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 Re: H Bolster steering gear. in reply to Gary Puckett, 04-19-2007 18:48:01  
Gary, The engineers at IH obviously tapered that shaft and gear so that it couldn't be 'adjusted' for end play. Why? Most likely that the entire assembly wouldn't be carried by the gear and nut, and 90% of the wear is from weight downward. This is the half round gear. Side wear accommodated by bushing replacement. Gear wear accommodated by replacing the gears. This H I plan to use solely for show and parades, therefore hi-speed transit to and from is desired. I did consider the welding and fileing. I can do that for a lot less than 150.00! Glenster...get that guy going on these gears. Get a quote. We'll get Cowman to market them
Gordo

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MN Scott

04-20-2007 10:23:44




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 Re: H Bolster steering gear. in reply to GordoSD, 04-19-2007 19:12:40  
They tapered it so the gear is locked to the shaft and not subject to loostening on the shaft.



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glennster

04-20-2007 06:45:32




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 Re: H Bolster steering gear. in reply to GordoSD, 04-19-2007 19:12:40  
i talked to my buddy over there at gear products, he can build the gears no problem, i gotta dig around in the shed and see if i can find an old set of worm and sector gears so he can get all the measurements. the gears are heat treated, and they also do that. if anybody needs something give him a call, 708-344-0875, bill.



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NDS

04-19-2007 18:36:07




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 Re: H Bolster steering gear. in reply to GordoSD, 04-19-2007 16:40:53  
If they did not shimmy on road and were not a PITA to drive we ran them and I am talking about tractors that often ran 100 hrs./week.



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kfox

04-19-2007 16:52:40




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 Re: H Bolster steering gear. in reply to GordoSD, 04-19-2007 16:40:53  
Gordo, I think the gear has a tapered spline. No turn over. :-(



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GordoSD

04-19-2007 17:56:49




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 Re: H Bolster steering gear. in reply to kfox, 04-19-2007 16:52:40  
Yes, you are correct. I had measured the gooves on on both sides and they were the same. But now looking at the gear, the lands (splines) are tapered. So now I'm thinking , mill off about .375 of the bottom support,and the same from the top, and let it ride a little lower and contact the better portion of the teeth?

Gordo



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Janicholson

04-19-2007 18:26:00




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 Re: H Bolster steering gear. in reply to GordoSD, 04-19-2007 17:56:49  
It might work for a few months, but you will have changed the basic castings such that it might be difficult getting it back together. I think I recall the gear being available, but pricy, I am for fixing things rather than replacing if at all possible. A good repair welder, with plasma pouder spray could build back the surfaces to spec., plus a few thousandths, and with patience and polishing effort it could be brought back to full tooth thickness. The worst would be to need to get a new (or good used) gear. Ford graphite based chassis/wheelbearing grease is a fine, non-leaking lube for the assembly, JimN

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kfox

04-19-2007 19:27:54




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 Re: H Bolster steering gear. in reply to Janicholson, 04-19-2007 18:26:00  
I'm working on a 41 H front end now. The tractor was owned for many, many years by someone who didn't own a grease gun. I'm having the upper pivot shaft bushing area built up now, and a spacer to go between the bottom thrust washer and the threst bearing.This should raise the gear up where it belongs.A spacer under the thrust bearing looks to me like the easiest way to go. The curved area on the top of the bottom bushing area, on the pivot shaft, would be hard to match, and the old thrust washer is worn down from lack of grease, and has been ground to fit. ken

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