My Great Grandfathers 1947 Cub!

The Cub Club -- Questions and answers to all of your Cub related issues.
Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
k hutchins
10+ Years
10+ Years
Posts: 674
Joined: Tue Mar 27, 2012 5:48 pm
Zip Code: 48843
Tractors Owned: 1948 Farmall Cub
193 plow
1948 snow/grading blade
Woods 59 C3
Cub 144 cultivator
Cub 22 mower
Cub 172 one row planter
Original manuals for all the above
Circle of Safety: Y

Re: My Great Grandfathers 1947 Cub!

Postby k hutchins » Tue Jun 08, 2021 7:00 pm

In my opinion, l would set your tractor at TDC then remove the mag.
If you're replacing the coil, condensor, and points, it makes it a whole lot easier to work on because you have to fish the wire down through to the bottom through a grommet (if it's still there). You can set the points easier by watching the cam if you spin it backwards then set them on the high side.
Then get your rotor set to the 1 oclock positon and remount the mag, setting up for static timing per the owners manual (coil toward the block) crank it back to #1 TDC, then rotate the top away from the block until it "snaps" tighten it into place and you should be good to go.
Why is there never enough time to do the job right, but always enough time to do it over. :?:

User avatar
Glen
10+ Years
10+ Years
Posts: 6071
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: My Great Grandfathers 1947 Cub!

Postby Glen » Tue Jun 08, 2021 7:40 pm

Hi,
The post above gives good advice.

The coil cannot be replaced without taking off the cover over the points, that the rotor is on.
The cover is held on with 3 screws.
The coil has a small wire that goes through inside the magneto, that has to be in the right place.
While the cover is off is a good time to replace the points.
I put a link to new points and a new coil at one of your posts before.

I would read about the magneto in the 1947 Cub owner's manual, and become familiar with it, before working on it. Pages 30 - 32 have info.

Step 2 on page 32 tells how to find number 1 cylinder TDC.
The page tells how to time the magneto to the engine, when you are done repairing the magneto.

The rotor is gear driven. The manual says to grease the gears under the cover that holds it on, the cover with the 2 screws.
Clean the old grease out, and put in new grease.
Check the teeth of the 2 gears for wear and replace the rotor and drive pinion gear if needed.
TM Tractor has a new rotor, and pinion gear if you need them.
The 2 gears have timing marks, check and align the marks while the cover is off.
Below is a pic of the timing marks. :)
Attachments
Cub magneto 4.jpg
Cub magneto 4.jpg (25.13 KiB) Viewed 137 times

Gary Dotson
Team Cub Mentor
Team Cub Mentor
Posts: 5590
Joined: Thu Aug 03, 2006 6:20 am
Zip Code: 43358
Tractors Owned: 48 Cub Diesel (Cubota)
53 Cockshutt 20 restored (Shooter)
52 Cockshutt 20 unrestored
47 Leader "B" (Herckie)
49 Leader "D" (Princess)
49 Leader "D" very rough
48 Leader "D" unrestored
Kubota B6200E
Kubota B6200HST
Kubota B8200HST-D
Circle of Safety: Y
Location: OH West Mansfield

Re: My Great Grandfathers 1947 Cub!

Postby Gary Dotson » Wed Jun 09, 2021 6:54 am

No problem, Frank, that was one of easiest all week-end. I agree with Hutch, much easier to make it a bench project.

AHS
Cub Star
Cub Star
Posts: 72
Joined: Sat May 29, 2021 4:34 am
Zip Code: 04428

Re: My Great Grandfathers 1947 Cub!

Postby AHS » Wed Jun 09, 2021 11:36 am

Ok, ALL great tips!! Thank you! The engine is at TDC #1. I’ve got magneto off, and I marked two spots, where the rotor cap was on the housing. I marked the retarted-advance spot. I should have marked the rotor to the small gear, but they have marks, (Glens picture). Now that I’ve got the magneto off, I can set the points to .013”. I am gonna take the magneto to Ebersons electric repair shop, just to see if the magneto can handle it! The magneto is gonna be spun, just set my points at .013”, align the marks on the rotor button, and put the rotor cap on and it’s all set? Or am I missing something?

Cubfriend
10+ Years
10+ Years
Posts: 1167
Joined: Sat Jan 28, 2012 3:13 pm
Zip Code: 68803
Tractors Owned: 1948 Cub, Kittie; 1948 Cub, Harold; 1949 Cub, 49er; 1951 Cub, Tucker; 1951 Cub, Homely; 1956 Cub High Crop; 1957 Cub Loboy; 57 Cub Loboy w/fasthitch + 194 plow; 1958 Cub LoBoy w/FH, Popeye; 1961 Cub, Beater; #1-1962 Cub Loboy Dually (Originally Orange) w/Foot Throttle; #2-1962 Cub Loboy Dually (Originally Orange) w/Foot throttle; Yellow 1963 Cub Loboy and blade; 1970 Cub, Cubbie; and 5 other Cubs in various stages of disaasembly and disrepair; 1962 Cub Cadet Original; 2 other Cub Cadet Originals; Cub Cadet 100; Cub Cadet 124 w/Creeper; Cub Cadet 147; 2 Cub Cadet 129's; Cub Cadet 149; 1948 Allis Chalmers C w/single frontwheel; 1944 Farmall H w/Tokhiem Cab; 2 One Point Fasthitch Carriers; 2-#100 Fasthitch Rear Blade; 2 Sets Cub 144 Cultivators; 2 Sets Cub #252 Cultivators; 3 Cub #193 Mouldboard Plows; 1 Cub #193 Slatted Plow; 1 1948 Cub-54 Snow Plow; 3 Cub-54 49-5 Snow Plows; Cub #6 Tool Bar w/Disc Blades & Middlebuster. 2-#105 sickle mowers, #152 disc plow
Circle of Safety: Y
Location: Grand Island, Nebraska

Re: My Great Grandfathers 1947 Cub!

Postby Cubfriend » Wed Jun 09, 2021 1:25 pm

Make sure when you spin the mag that it can go to a good ground otherwise some damage could occur.
Frank

User avatar
Glen
10+ Years
10+ Years
Posts: 6071
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: My Great Grandfathers 1947 Cub!

Postby Glen » Wed Jun 09, 2021 4:30 pm

Hi,
They have said on here don't turn the magneto at the drive end, and make it snap, if it is disconnected from the spark plugs, it can damage the magneto to generate power with no place for the power to go.

If you are not replacing the points, file the point surfaces so they are flat and shiny, and set their gap.
Wipe off all filing with a clean rag. :)


  • Similar Topics
    Replies
    Views
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: Glen and 4 guests