Mystery plug...

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JustJim
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Mystery plug...

Postby JustJim » Wed Sep 29, 2021 1:13 pm

Good news, is that I received my engine back from the machine shop this week. It cost about twice what I had hoped, but I suppose that's hardly surprising.

Bad news, is that it came with a small pile of loose parts. I had hoped to enlist the services of the shop to measure my cylinders, and then make an informed deciscion about the neccessity of a rebore. For that reason, I had not pulled off the rear mainseal retainer nor the oil pump, as I really hoped I would just be doing the valves. Didn't work out that way.

All the parts were pretty simple to puzzle out, but I am left with a plug i can't find a home for.

ImageIMG_1666 by Jim QRB, on Flickr

It's .540" by 18 TPI. I've looked pretty carefully, and have yet to find a place for it. It may have been on the workbench from another job, and may not go to the Cub's block at all. But I really don't want to get everything together and find I have to disassemble again because I overlooked the proper location of this.

It's not the priming plug for the oil pump. That one is in place, and it's smaller in diameter. Does this look familiar to anyone as belonging in the block of a Cub? I'd appreciate any help...

indy61
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Re: Mystery plug...

Postby indy61 » Wed Sep 29, 2021 1:44 pm

It may be an oil galley plug. There is one behind the front cover and one behind the valve tappet cover that are sometimes overlooked.

Cub Block 1.jpg

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Barnyard
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Re: Mystery plug...

Postby Barnyard » Wed Sep 29, 2021 2:05 pm

If it is an oil galley plug you need to have the shop put it back before you start the engine.
There are two ways to get enough Cubs. One is to continue to accumulate more and more. The other is to desire less.

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JustJim
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Re: Mystery plug...

Postby JustJim » Wed Sep 29, 2021 2:43 pm

I told my darling' bride that I was pulling my hair out trying to find the home for that plug. She said, "Why not ask your buddies on that Cub forum?"

Well, now I'm going to have to tell her she was right (as usual), and that you fellows solved the mystery right off! Indy61 and Barnyard, you nailed it. The plug was hidden behind the camshaft gear. There's a shiny new stainless plug there, so the old gent who did the valves replaced that when he installed the camshaft and its gear.

Thanks once again friends! :D

indy61
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Re: Mystery plug...

Postby indy61 » Wed Sep 29, 2021 4:10 pm

Good to hear, I hope the rebuild turns out well for you. I assume you checked the galley plug behind the valve cover.

mvc_3747s.jpg

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Bill Hudson
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Re: Mystery plug...

Postby Bill Hudson » Wed Sep 29, 2021 4:58 pm

Answer in 31 minutes, not bad.

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ricky racer
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Re: Mystery plug...

Postby ricky racer » Wed Sep 29, 2021 6:40 pm

That 1/4" NPT plug is the only oil gallery plug of its size in the C60 engine. All others are 1/8" NPT. Just for reference....
1929 Farmall Regular
1935 John Deere B
1937 John Deere A
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JustJim
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Re: Mystery plug...

Postby JustJim » Wed Sep 29, 2021 7:31 pm

Indy61 - Yes, thank you, that one is present.

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Pap
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Re: Mystery plug...

Postby Pap » Thu Sep 30, 2021 3:02 pm

Hey Brother looks like you are going to have spare parts...... :lol: :lol: :lol:...Jim I know that you will find somewhere to put that piece. :hattip:
Are We Having Fun Yet ? :D
'47 cub ( Err Err )

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Barnyard
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Re: Mystery plug...

Postby Barnyard » Thu Sep 30, 2021 4:48 pm

FT
Pap wrote:Jim I know that you will find somewhere to put that piece.

I think he already did.
There are two ways to get enough Cubs. One is to continue to accumulate more and more. The other is to desire less.

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Pap
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Posts: 414
Joined: Mon Jun 07, 2021 8:43 pm
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Tractors Owned: 1947 Cub ( Err Err )
I could not say tractor when I was 2 years old so I called it Err Err.

I loved this tractor then and I still love it now.
Circle of Safety: Y
Location: Columbia, Tennessee

Re: Mystery plug...

Postby Pap » Thu Sep 30, 2021 6:30 pm

Hey I am just messing with my friend Jim....

I can read.... I know that he knows where it went.
Are We Having Fun Yet ? :D
'47 cub ( Err Err )


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