Dot bolts - IH bolts - years?

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inairam
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Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 with c-2 mower & c-54 grader blade 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v
1975 with homemade mower 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 6 v
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
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Dot bolts - IH bolts - years?

Postby inairam » Sat May 16, 2020 7:07 am

What years were dot bolts used and IH bolts used? What happened after IH bolts - just off the shelf bolts?
When you only have 9 horsepower you need to know the names of all of the ponies!

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Glen
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Re: Dot bolts - IH bolts - years?

Postby Glen » Sat May 16, 2020 5:40 pm

Hi,
The bolts with a dot on the heads were used for the first few years of Cubs.
By 1955 they had changed to modern markings, with a dot in the center of the head, and 3, or 6 lines.
My 1956 Cub has mostly bolts with the IH on the heads, and 3 or 6 lines.
In the 1970's, they used bolts with WP on the heads. I remember seeing them at the dealer.
I don't know the exact years when they changed from one to another.

Below is the torque table from the Cub service manual, GSS-1411, from 1976, showing the bolt heads in the lower right of the page.
At the bottom of the page it gives some info about the bolts. :)

http://www.farmallcub.info/manuals/gss- ... 000-06.jpg

Daniel H.
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Re: Dot bolts - IH bolts - years?

Postby Daniel H. » Mon May 25, 2020 8:54 pm

IH made ther own bolts. I believe the WP was West Pulman works. I think the production methods changed when they went from the dot head bolts to the modern 3 or 6 lines.
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Glen
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Re: Dot bolts - IH bolts - years?

Postby Glen » Thu Jun 11, 2020 12:50 am

Hi,
Your info says you own Cubs from different years, you could look at them to see if they have bolts with the different markings on the heads through the years.

Below is a pic from TM Tractor of a transmission shift fork with an IH bolt in it. :)
Attachments
Cub trans 23.jpg

inairam
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Posts: 1621
Joined: Wed Jul 08, 2015 10:24 am
Zip Code: 19342
Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 with c-2 mower & c-54 grader blade 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v
1975 with homemade mower 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 6 v
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: Dot bolts - IH bolts - years?

Postby inairam » Thu Jun 11, 2020 6:29 am

My question is for restoration purposes. I have bolts and I have tractors I was just looking for a guide as to what goes where.

I pretty sure anything in the 40s is dot and anything in the 70s is wp. It is the IH bolts - when did IH start and when did they end is the question.

I have not noticed anything in the parts books saying "up to sn xxxxxx" or "after sn xxxxxx" use this bolt. How did IH control/introduce the different bolts? There must be something documenting it from IH.
When you only have 9 horsepower you need to know the names of all of the ponies!

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Stanton
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Re: Dot bolts - IH bolts - years?

Postby Stanton » Thu Jun 11, 2020 7:13 am

In answer to your question, I don't think there's a comprehensive "guide" showing the breakdown in years when each type of bolt was used. There would be no reason for IH to produce such a guide. I do think they mentioned changes or revisions along the way. Here's some info on bolts I just found on the Wisconsin Historical Society's website of the McCormick Collection (located here: https://www.wisconsinhistory.org/Records/Article/CS15303).

I did a Browse search for "bolts" and there were 21 pages with over 400 results. Here's some of interest:

A 1951 article in a periodical mentions the WP bolts:
page_14.jpg

page_15.jpg


Then a portion of an internal directive letter from IH about the "IH" Trademark dated November 1, 1962:
November 1962 IH Trademark Letter.JPG


So, we know that by November 1, 1962, all bolts were to have the "IH" stamped on them. That doesn't mean they all magically started using the new "IH" bolts on that date; old stores of "WP" bolts would have to be used up first. But this gives us a better time frame when the transition was made. Hope this helps. I didn't find any info on when the "WP" bolts replaced the "dot" bolts.

If you have some time, browse through the Wisconsin Historical Society's website and share what you find with us. Thanks.
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Jim Becker
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Re: Dot bolts - IH bolts - years?

Postby Jim Becker » Thu Jun 11, 2020 1:29 pm

I don't think the trademark directive necessarily indicates the IH was physically on the bolt. It does mean that it was available for use in some aspect of marketing (which probably included the box the bolts came in).

The "WP" bolt marking came after the "IH" marking. All three head markings were produced at West Pullman at one time or another. Note the bolts in the 1951 picture were being produced at West Pullman and have dot heads.

tomcough
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Re: Dot bolts - IH bolts - years?

Postby tomcough » Sun Jun 14, 2020 9:31 am

West Pullman suppled fasteners to General Motors. My grandfather owned a 1969 Chevy Biscayne. The machine screws holding down all the sheet metal in front of the engine bay had the IH logo.

Gary Dotson
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Re: Dot bolts - IH bolts - years?

Postby Gary Dotson » Mon Jun 15, 2020 8:13 am

I believe that's correct, Tom. My friend was looking for the correct bumper bracket bolts for his 67 Corvette, the restoration manual specified the WP head marking. They were available from a restoration supplier.


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