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rear end bolts - grade 5?

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Dan W.
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rear end bolts - grade 5?

Postby Dan W. » Mon Sep 25, 2006 6:48 pm

I tore down the rear end on my '47 Cub this summer and am now putting it back together. I need some new bolts and cap screws. At this point I'm bolting the left final drive and the right differential shaft housing to the differential case. Problem is that the bolt packages listed in the parts manual didn't seem right so I went to the hardware store. They had the lengths I needed only in grade 5. I wanted grade 8. Will grade 5 be strong enough in the long run?
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Bus Driver
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Postby Bus Driver » Mon Sep 25, 2006 7:05 pm

Given that the castings are not especially thick at the bolting points and my hunch that Grade 8 was not original, I would use the Grade 5 for my personal tractor. Buying Grade 8 overlength and cutting to length is another option.
Luck favors those who are prepared
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Buzzard Wing
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Postby Buzzard Wing » Wed Sep 27, 2006 10:12 pm

My yeller Cub had grade 5 everywhere. They were factory bolts, no dots on the newer ones.
1971 Cub (Rufus) 1950 Cub (Cathy) 1965 Lo Boy Fast Hitch (Nameless III) 1970 Cub 1000 Loader & Fast Hitch (Lee)
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Dan W.
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Location: western NY

Postby Dan W. » Thu Sep 28, 2006 6:55 pm

Thanks for the replies. What does the dot on the bolt head indicate? And if the factory bolts lack the usual markings for grade 5, grade 8, etc. how can you tell what grade they are?
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Ron L
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Postby Ron L » Fri Sep 29, 2006 12:06 pm

Dan. Maybe this will help ..................

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Ron
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Buzzard Wing
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Postby Buzzard Wing » Fri Sep 29, 2006 5:39 pm

Someone wiser than me could say, but I believe that IH made their own bolts in the old days. The infamous 'dot' bolts.

Not my favorite job, but I ran em all through a wire wheel, primed and painted em.

http://i2.photobucket.com/albums/y40/Bu ... b81202.jpg
http://i2.photobucket.com/albums/y40/Bu ... aba839.jpg
http://i2.photobucket.com/albums/y40/Bu ... c7c189.jpg
1971 Cub (Rufus) 1950 Cub (Cathy) 1965 Lo Boy Fast Hitch (Nameless III) 1970 Cub 1000 Loader & Fast Hitch (Lee)
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