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Engine Work - Update

The Cub Club -- Questions and answers to all of your Cub related issues.
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Clemsonfor
501 Club
501 Club
Posts: 1118
Joined: Sun Nov 10, 2019 5:14 pm
Zip Code: 29848
Tractors Owned: Yanmar YM2000
Yanmar YM186 (non running)
1952 Farmall Cub
Circle of Safety: Y
Location: Greenwood County SC

Re: Engine Work - Update

Postby Clemsonfor » Mon Aug 22, 2022 7:29 pm

Wow, good and thorough work! Impressive template set. The cork gasket I had must of been junk cause it didn't stay together well while I cut on it.

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Stanton
Cub Pro
Cub Pro
Posts: 7760
Joined: Mon Jun 22, 2009 6:56 am
Zip Code: 64070
Tractors Owned: 1942 Farmall AV, serial #87025
1947 Farmall Circle Cub, serial #2116
1948 Farmall Cub, serial #46066
Circle of Safety: Y
Location: Lone Jack, MO

Re: Engine Work - Update

Postby Stanton » Fri Aug 26, 2022 8:43 am

The paint on the manifold has really held up well over the years, but was starting to show some age. It's Dupli-Color Cast Iron Coat, high temp paint.

IMG_5493.JPG
Wire wheel it down.

IMG_5494.JPG
Done with stripping.


I noticed the space in between the (2) manifold gaskets was deteriorating, as well as a couple places on the very ends; pitting and uneven. Bought some JB Weld HighHeat epoxy and filled in the low spots. Then, after waiting 24 hours for it to cure (just like the instructions suggest :wink:) I used an ol' wood plane with some adhesive backed sandpaper on the bottom to smooth/sand it down flat. Worked really well.
IMG_5495.JPG

IMG_5499.JPG

IMG_5500.JPG

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After sanding, it was time for some Dupli-Color high temp primer, followed by the paint I mentioned above.

IMG_5502.JPG


The manifold nuts that go on the studs were painted red before. The problem is that whenever painted nuts are installed, the paint always chips and then you have to go back and touch up the paint. Kind of a pain in the neck. So I decided to oil quench the (4) manifold nuts. Heated them up with a propane torch, then dropped them into a cup of used motor oil; little heat, lotta smoke, result: blackened nuts.

IMG_5503.JPG

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Manifold installed.

IMG_5513.JPG
Blackened nuts almost disappear.
Stanton
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Stanton
Cub Pro
Cub Pro
Posts: 7760
Joined: Mon Jun 22, 2009 6:56 am
Zip Code: 64070
Tractors Owned: 1942 Farmall AV, serial #87025
1947 Farmall Circle Cub, serial #2116
1948 Farmall Cub, serial #46066
Circle of Safety: Y
Location: Lone Jack, MO

Re: Engine Work - Update

Postby Stanton » Sun Sep 04, 2022 9:04 am

Time to get the magneto back on. It was working fine, but have decided to go through it just to clean it up and give any maintenance that needs to be done. As always, I'm describing what I do, not telling you how to do it.

Start with cleaning up the outside.
IMG_5531.JPG

Pop the distributor cover and clean out the inside. This one was really clean. Touched up the exposed brass parts with some very fine sandpaper (320 grit) and blew it out.
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Removed distributor rotor to see it needs to have some more grease added.
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Both screw heads have been boogered up over time, so will need to fix those on reassembly.
IMG_5535.JPG

Hard to see, but the points have a burnt spot on each of them that will need some filing.
IMG_5537.JPG

You don't have to totally remove the nut holding the electrical terminals in place. Just loosen it enough to remove the breaker rocker arm. I use a pair of needle nose pliers to lift it straight up.
IMG_5540.JPG
Removal of the breaker rocker arm.

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Cleaning up the wiring terminal connectors with sandpaper. Make sure all electrical connections are bright, shiny, and clean.

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Clean body cavity out with Q-tip soaked in acetone. Blow out when done.

Used a points file instead of sandpaper on the breaker points. You can get one at most full-line auto parts stores.
IMG_5545.JPG

Breaker points filed and ready to reinstall.
IMG_5548.JPG

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A dab of grease on the breaker rocker arm post and under the cam per the Owner's Manual.
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Screw heads cleaned up with a file and a hacksaw blade.

There's a raised line on the distributor rotor that needs to be aligned with the line on the rotor pinion. I've highlighted both lines with a silver marker. These have to be lined up for the mag to be in time.
IMG_5562.JPG

The Manual calls for magneto grease, but don't believe that's available anymore. I use dielectric grease. Others, who are more experienced than me, probably use different types of grease. Again, I'm describing what I do, not telling you how to do it.
IMG_5563.JPG

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End result: Nice spark.
IMG_5582.JPEG
Stanton
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Stanton
Cub Pro
Cub Pro
Posts: 7760
Joined: Mon Jun 22, 2009 6:56 am
Zip Code: 64070
Tractors Owned: 1942 Farmall AV, serial #87025
1947 Farmall Circle Cub, serial #2116
1948 Farmall Cub, serial #46066
Circle of Safety: Y
Location: Lone Jack, MO

Re: Engine Work - Update

Postby Stanton » Thu Sep 08, 2022 2:47 pm

Well, it's time to bring this one to a close. Started Nellie today for the first time since...(I can't remember). Have some adjusting to do to get rid of the surging, but here's a 0:30 second video of the start-up. She has good oil pressure and no smoke. :D

https://youtube.com/shorts/BjFAM7l3Rg0?feature=share

Thanks to everyone, including the experts, on here that helped with suggestions and answers.
Stanton
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Jimmler
Posts: 8
Joined: Mon Aug 29, 2022 1:14 pm
Zip Code: 93444
Tractors Owned: 1947 Farmall Cub
1974 Cub Cadet 149

Re: Engine Work - Update

Postby Jimmler » Thu Sep 08, 2022 3:36 pm

Sounds great! Good job!!
-Jim

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Dale Finch
10+ Years
10+ Years
Posts: 6683
Joined: Tue Apr 27, 2010 11:34 am
Zip Code: 27517
Tractors Owned: '51 Cub #140966 "Bruno" with Woods 59 mower
'55 Cub #187541 "Betty" with Fast Hitch
'55 Cub #190482 "Ben" with Woods 42 mower
'55 Cub #191739 "Bertha" with Woods 42 mower
'56 Cub #194370 "Boris" with Mott Flail mower
Circle of Safety: Y
Location: NC, Chapel Hill

Re: Engine Work - Update

Postby Dale Finch » Thu Sep 08, 2022 8:04 pm

HOT DIGGITY!!! Congrats!! :{_}:
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PFord
Cub Star
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Posts: 172
Joined: Sun Jun 19, 2022 12:14 pm
Zip Code: 32312
Tractors Owned: 1975 International Cub

Re: Engine Work - Update

Postby PFord » Thu Sep 08, 2022 8:45 pm

Great stuff!

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dgrapes59
10+ Years
10+ Years
Posts: 3736
Joined: Sun Jul 13, 2008 10:05 pm
Zip Code: 45067
Tractors Owned: 1951 Cub, 2-1955 Loboy w FH, a few plows, discs, mowers, blades, carrier & such
Several '61 CC Originals, Cub Cadet 100, several 102's & 122's, 124, various CC options & implements, #1Trailer, 1963 Springfield, JD 770, Ford 8N
Circle of Safety: Y
Location: OH, Trenton

Re: Engine Work - Update

Postby dgrapes59 » Thu Sep 08, 2022 9:20 pm

Great job, Stanton! Thanks for taking the time to document your project, I enjoyed following it!
David

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Pap
501 Club
501 Club
Posts: 653
Joined: Mon Jun 07, 2021 8:43 pm
Zip Code: 38401
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: Engine Work - Update

Postby Pap » Thu Sep 08, 2022 9:32 pm

Great Job Stanton !! Great video !!
I have truly enjoyed it !!
Thanks..
Are We Having Fun Yet ? :D
'47 cub ( Err Err )


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