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Bull Gears


 
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Tinks 1996
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PostPosted: Sun Jan 12, 2020 3:00 pm    Post subject: Bull Gears Reply to specific post Reply with quote

Does anyone know if the bull gears out of a 560 work in a 400 ?
 
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D Slater
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PostPosted: Sun Jan 12, 2020 4:10 pm    Post subject: Re: Bull Gears Reply to specific post Reply with quote

Most 560 bull gears have a different pressure angle on the teeth than a 400. May find a few like a 400 left in a early 560.
 
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Dieseltech
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PostPosted: Sun Jan 12, 2020 6:20 pm    Post subject: Re: Bull Gears Reply to specific post Reply with quote

IH used 20 and 25 degree pressure angle teeth in some models. While the tooth count is the same MAKE SURE the top of the teeth match on both original and replacement gears.
 
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Janicholson
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PostPosted: Sun Jan 12, 2020 6:58 pm    Post subject: Re: Bull Gears Reply to specific post Reply with quote

Pressure angle is the angle of a theoretical plane created where the teeth touch. 14.5 degrees and 20 degrees are most common. they will not run together with the wrong drive pinion. Jim
pressure angle.

 
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D Slater
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PostPosted: Sun Jan 12, 2020 7:33 pm    Post subject: Re: Bull Gears Reply to specific post Reply with quote

F-560 from serial number 23925 and lower were built with the same bull gear as a 400, SM, ETC. But some failed or were recalled to get updated parts. Supposed to have a triangle stamped on the serial plate if so. Can't depend on things without checking though.
 
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pete 23
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PostPosted: Sun Jan 12, 2020 7:49 pm    Post subject: Re: Bull Gears Reply to specific post Reply with quote

I think it would be a rare 560 that was not updated to the newer 25 degree pressure angle bull gear. The dealers had the option of doing the work or a team of IH employees would do it if you so desired or could not get them done in time for end of program.

I did all ten we had out that needed the update and don't know of any in our area that were not done. The neighboring dealer had IH do some of theirs from what I heard later.

You can look at the gear teeth and see the difference if you have both to compare. The newer 25 degree tooth is wider at the base and narrower at the top.

Also, not all serial number plates were marked so you never know for sure without looking at the gear. Of course a lot of other parts were changed at the same time . The bull pinion , differential and differential support housing with the much larger ball bearing on the new bull pinion, tapered roller bearings on differential etc.
 
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JimB2
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PostPosted: Mon Jan 13, 2020 4:47 am    Post subject: Re: Bull Gears Reply to specific post Reply with quote

Jim, thanks for the link to the article on gear teeth angles, very interesting. I grew up on a small dairy farm and was always interested in mechanical design but studied electronics and programming instead.
 
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rustyfarmall
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PostPosted: Mon Jan 13, 2020 6:23 am    Post subject: Re: Bull Gears Reply to specific post Reply with quote


Used bull gears, mated up to the existing bull pinion gears, will be very, very noisy. Eventually they will wear into each other and the noise will diminish, but it will take a long, long time.
 
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Old weldor
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PostPosted: Mon Jan 13, 2020 10:24 am    Post subject: Re: Bull Gears Reply to specific post Reply with quote

460 tractors were recalled too, my 1959 460 has the triangle stamped on the serial number plate!
 
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pete 23
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PostPosted: Mon Jan 13, 2020 3:06 pm    Post subject: Re: Bull Gears Reply to specific post Reply with quote

Yes, some of them I did were 460's. They actually wore the old or new bull gears more than a 560 did around here. Turned a lot of them around when they got older.
 
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Tinks 1996
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PostPosted: Thu Jan 16, 2020 6:26 pm    Post subject: Re: Bull Gears Reply to specific post Reply with quote

Thanks for all the info !!!!
 
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Tinks 1996
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PostPosted: Thu Jan 16, 2020 6:33 pm    Post subject: Re: Bull Gears Reply to specific post Reply with quote

Is there any other way to tell if a 460 or 560 is updated ?
 
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