Governor Shaft End Play Tolerance Question

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DRaymond
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Governor Shaft End Play Tolerance Question

Postby DRaymond » Wed Feb 03, 2016 2:23 pm

Well sometimes when you have more than one reference things can get confusing and I am no challenge to get confused. I need some technical help in my governor rebuild for my 48 Cub. I did tag this question on a post of Rudi's but thought I would make it a topic so here goes.

My Governor Shaft end clearance is 0.042". The IH-8 International Harvester Shop Manual October 2012, p 43, Fig. IH391 states that the end play should be 0.004-0.013. The Cub and Cub Low-Boy Tractors Service Manual, GSS 1411 W/Revision 1 Feb 1976 says "Governor Shaft end clearance is adjusted by placing 0.020 inch thickness of feeler gauge stock between drive gear and governor assembly. After gear is pressed in place, the end clearance should be within the range of 0.020 to 0.025 inch."

As a practical matter the gear is not going to be able to be re-positioned so a thrust washer will be needed to bring the shaft end clearance within a specified tolerance. So two questions:

1. What is the correct end play tolerance range specification? .004" - .013" or .020" - .025"?; and
2. What is the specification/nomenclature/part number for the fiber thrust washer or material I have read about?

Would bronze bushing/bearing material be satisfactory?

Thank you for any help
DT Raymond
Spokane, WA
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John *.?-!.* cub owner
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Re: Governor Shaft End Play Tolerance Question

Postby John *.?-!.* cub owner » Wed Feb 03, 2016 10:08 pm

What about pressing the gear on further, or if you do not have the tools, take it to a machine shop?
If you are not part of the solution,
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DRaymond
Cub Star
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Posts: 84
Joined: Thu Dec 03, 2015 6:28 pm
Zip Code: 99223
Tractors Owned: 1948 FCub 13747 "Marie"
1948 FCub 16109 "Lizzie"
1948 FCub 44181 "Gussie"
Cub-54A Leveling & Grader Blade
Cub-22 Mower
Cub-193 Moldboard Plow
Circle of Safety: Y

Re: Governor Shaft End Play Tolerance Question

Postby DRaymond » Fri Feb 05, 2016 6:59 pm

That is a thought but other comments I found gave me the impression that that option could be problematic. Gear is probably a shrink fit which would involve heat and I would not know what temp, etc.
DT Raymond
Spokane, WA
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48 FCUB - Marie
48 FCUB - Lissie
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Glen
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Re: Governor Shaft End Play Tolerance Question

Postby Glen » Fri Feb 05, 2016 10:06 pm

Hi,
I would use the spec that the IH service manual says. I would try doing it like John said, maybe put a feeler gauge in the gap between the body and gear during the pressing, so you don't press it too far on the shaft. :)

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Re: Governor Shaft End Play Tolerance Question

Postby Sailor » Mon Feb 08, 2016 10:41 am

Are you referring to the gap between the housing and the gear? If so, I was faced with the same problem. After a lengthy thread on possible causes and fixes it dawned on me that my Cub was running great before I tore it down, so I cleaned it up, painted it and put it back in. :D

I have yet to fire it off, so time will tell.
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