Farmall Cub Dog Ears - Legs lower attachment question

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WDuggan
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Farmall Cub Dog Ears - Legs lower attachment question

Postby WDuggan » Mon Mar 01, 2021 10:23 am

Hi,
I'm in the process of restoring a 1947 Cub and it's missing dog legs. So I order some legs/ears and don't know how or where to attach them. Here is an early picture of the tractor, it looks a lot better now with basting and paint but still stuck on the sheet metal.
I've attached a picture of the parts but don't know what I'm missing.
Thanks in advance for the help.
Attachments
Front.jpg
Dog-leg2.JPG
Sample from TM Tractor

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Re: Farmall Cub Dog Ears - Legs lower attachment question

Postby Bob McCarty » Mon Mar 01, 2021 10:36 am

Here's a link to TM Tractor: http://www.tmtractor.com/new/tg/229fp.htm (scroll down to the bottom pictures). You may need to wire wheel that area to spot where they broke off. They are 10-24 x 1/2". Most replace them with stainless.
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Re: Farmall Cub Dog Ears - Legs lower attachment question

Postby Barnyard » Mon Mar 01, 2021 10:38 am

When drilling them out be careful not to drill too deep or you could go through the water jacket.
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Re: Farmall Cub Dog Ears - Legs lower attachment question

Postby Peter Person » Mon Mar 01, 2021 10:42 am

The ones on the side with the steering gear (right side sitting in the seat) are a pain. Definitely need to be careful drilling the old screw and re-tapping the holes.

From the "How to" forum;
http://www.farmallcub.com/phpBB2/viewtopic.php?f=147&t=44710
Last edited by Peter Person on Mon Mar 01, 2021 11:04 am, edited 1 time in total.
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Re: Farmall Cub Dog Ears - Legs lower attachment question

Postby Jim Becker » Mon Mar 01, 2021 10:44 am

I see you got 3 other responses while I was typing this.

The lower end of the dog legs screw directly to the steering housing, immediately below the radiator. The light colored dot in your picture looks like it might be a broken screw. Look at this page on TM Tractor Parts web site.
http://www.tmtractor.com/tm-tractor/gst ... ng_001.htm
There are pictures of both sides where you can see the screw holes. (One of them is filled with a broken screw.)

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Re: Farmall Cub Dog Ears - Legs lower attachment question

Postby WDuggan » Mon Mar 01, 2021 1:57 pm

Thank you for the reply. I'm starting to understand it. It seems on both sides the screws are broken off almost flush and almost un recognizable as screws.
If I get this right, don't drill and tap too far otherwise you risk drilling into the water jacket.
I'll check the other posts to see how they did it and how far in they went.
Yikes, I did not know the risks on this...thank you. No wonder people left them off :)
Thank you.

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Re: Farmall Cub Dog Ears - Legs lower attachment question

Postby Bob McCarty » Mon Mar 01, 2021 2:02 pm

The hole is deeper than the length of the screw. You can feel when the drill bit cuts through the screw and enters the void, or wrap a piece of tape around the drill bit.
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Re: Farmall Cub Dog Ears - Legs lower attachment question

Postby inairam » Mon Mar 01, 2021 2:32 pm

the side with the steering shaft will require an extension for the drill bit otherwise you will not be able to hold the drill perpendicular to the surface.
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Re: Farmall Cub Dog Ears - Legs lower attachment question

Postby Glen » Mon Mar 01, 2021 7:50 pm

Hi,
The hood side panels are not an extra, every Cub came with that style, up to mid 1964. If you didn't have any, someone left them off the Cub.
If the holes are not open, someone twisted off the screws.

Pics of your Cub with more light by the screw holes would be helpful.

If the screws are twisted off, they need to be drilled out, and re tapped to the right size.

Use a good center punch and punch the screw exactly in the center. If the end of the screw is not flat, grind it flat first. Remove as little material as possible when grinding.

Start with a drill bit smaller than the screw first, and then use the bit the size to be used last before cutting threads. Keep them in the center of the screw, don't let it wander off to the side.

If you are drilling in the lower casting, they have said on here when you drill through an original length screw, there is a space between the end of the screw and the casting. The drill will pass through the space freely. Stop drilling then, don't drill into the casting, there is no need to drill into the casting, the coolant is in the casting.
It's possible the screws were not the original length, if they were longer, there might be no space at the end of the screw, measure the hole depth, and be careful.
The hole depth only has to be part of the length of the screw. Subtract the thickness of where the screw goes through the side panel.

Remember to look up the size drill bit to use in the hole before cutting new threads. The bit has to be smaller than the OD of the screw threads. :)

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Re: Farmall Cub Dog Ears - Legs lower attachment question

Postby WDuggan » Mon Mar 01, 2021 8:13 pm

Thank you. I'll follow the advice and go slowly and carefully. I appreciate all the advice as I was really stuck. Thank you.

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Re: Farmall Cub Dog Ears - Legs lower attachment question

Postby Stanton » Tue Mar 02, 2021 8:22 am

WDuggan wrote:Thank you. I'll follow the advice and go slowly and carefully. I appreciate all the advice as I was really stuck. Thank you.



When I did mine some time ago, I bought an extra long drill bit for drilling out the bolts in the right side, above the front end steering box. The left side can be accessed easily with a standard length bit/drill. Think the extra long one was 8", but you might want to measure and decide for yourself.

Go slow; have patience. The Parts Manual states those screws are 10-24 x 1/2".
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Re: Farmall Cub Dog Ears - Legs lower attachment question

Postby Don B. » Tue Mar 02, 2021 8:40 am

It may not have been mentioned yet but an $8 set of left-handed drill bits from Harbor Freight can do a good job of getting those out.
I ground mine flush, center punched the screw, and drilled slowly with the left-hand bit. At about the time it was getting through the screw, it jammed, and backed the screw out slick as can be. I actually stood there for a few seconds staring at the bit and marveling at the accomplishment! I wish that was my idea but I swiped it off another forum member somewhere. Chased the threads with a tap and we were good to go. Your mileage may vary.
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Re: Farmall Cub Dog Ears - Legs lower attachment question

Postby JimCub48 » Tue Mar 02, 2021 9:06 am

I have also used left hand twist bits for removal of broken screws and bolts, the key is to be centered when you start drilling.

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Re: Farmall Cub Dog Ears - Legs lower attachment question

Postby Rick Prentice » Tue Mar 02, 2021 9:10 am

If all else fails, you can make a small bracket that fastens using a radiator bolt and then trimming off the 2 small original bolts. Once its finished it's hard to tell the difference, especially if you paint the bracket.

Pic no1 bracket installed.
Image

pic no2 bracket with small bolts.
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Re: Farmall Cub Dog Ears - Legs lower attachment question

Postby lowgearfarm » Tue Mar 02, 2021 10:51 am

I've had drilling out those broken dog leg bolts [screws?] on my "things to do" list for years. The suggestion of buying left hand bits and CAREFULLY drilling them out was enough to get me to order the bits just now. If and when the temperature gets above freezing (and if and when the bits ever arrive) I look forward to drilling them out. Thanks for the nudge.


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