Allis B engine drain plug- Dick L

Bill Marcusky · Dec 21, 2015

Just curious if anyone knows what thread size tho engine oil drain plug is on my 38 b? Old one is all buggered up and destructive removal is necessary. Old one looks like a 1/4 inch pipe plug but not sure either.

Bob Bancroft · Dec 21, 2015

I think more like 3/8" NPT.

Brian G. NY · Dec 21, 2015

I would guess 1/4" pipe.

I picked up this A-C book a while back just because it was Allis.
It lists standard parts by their description and Allis part number.
I found this page which lists the various drain cocks used on Allis tractors.
You may be able to find the one you're looking for here.

Brian G. NY · Dec 21, 2015

Bill, I apologize to you and Dick for butting in.....I just saw an opportunity to put this odd book to some good use.

chalmersbob(Pa) · Dec 21, 2015

3/8" pipe plug

Dick L · Dec 22, 2015

3/8" tapered pipe thread in the pan, Several different styles of plugs of that thread can be found in old tractors.

Bill Marcusky · Dec 22, 2015

No problem actually wanted to say Dick L and
others anyway. Just wanted to make sure it was
without a doubt pipe thread before I drilled it out.
Thanks everyone.

Allis B engine drain plug- Dick L

Bill Marcusky

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Bob Bancroft

Well-known Member

Brian G. NY

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Brian G. NY

Well-known Member

chalmersbob(Pa)

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Dick L

Well-known Member

Bill Marcusky

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