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2 Farmall Cubs


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#46 DH1 ONLINE  

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Posted September 14, 2013 - 09:02 PM

Doug, it's either a full out fix on that or (and this is what I would try first) a tube of Alumi Seal and a full days working it to seal it up.

 

How do I fix without taking it apart?



#47 MH81 ONLINE  

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Posted September 14, 2013 - 09:08 PM

If you are going to "fix it, fix it"... You will have to take it apart as far as I know...
Maybe a radiator shop could just pull the core and lead up the seam there, but that won't be cheap.

If you pick at it and try an external sealant, it'll possibly get worse. On the upside, this isn't a pressurized system, so if you get it to quit, it might hold.

The only pour-in way I would try to fix it is alumni seal. Bars leak an I have a zero positive result track record.
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#48 DH1 ONLINE  

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Posted September 14, 2013 - 09:11 PM

JB Weld???



#49 MH81 ONLINE  

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Posted September 14, 2013 - 09:22 PM

Might hold, but not forever IMHO.
Water will always find a way.

#50 IHCubGuy ONLINE  

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Posted September 14, 2013 - 10:38 PM

You can take it apart and try to fix it and it may or may not hold.  The other choice would be to get a used lower housing or a new aftermarket lower housing.  I would go the new aftermarket myself personally but they ain't cheap. 


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#51 DH1 ONLINE  

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Posted October 14, 2013 - 03:27 PM

Update

 

It's being a month since I posted anything on this, got sidetracked.I did get some needed parts for it

I have tried several times to fix this by re welding it and have had no luck, if I weld at low power I get pin holes that the coolant leaks out, if I weld at high power it's almost as if it cracks right along the edge of the weld and leaks.

I don't know how to fix this most say get another one is the only sure fire way.

001.JPG

 

On the up side

It was a bright sunny day and I did get some painting done, was hoping to paint the whole tractor but with the leak all I got done was the hood wheels and weights.

The hood turned out good so the day was not a total loss.

I guess I'm going to have to swap the 2 lower housings to make 1 good one of the 2.

Was hoping to keep the Demonstrator all together but I don't want to spend any more money on this thing than I have to. It doesn't even belong to me and 99% I won't get paid for the work I've done on it. It's being in my way for 3yrs now and I want it done and gone so I can work on my stuff.


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#52 KennyP ONLINE  

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Posted October 14, 2013 - 03:41 PM

Sorry it's not cooperating with you, Doug. Maybe it wants to be brazed!



#53 CRFarnsworth ONLINE  

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Posted October 14, 2013 - 04:40 PM

 

 

 

I have tried several times to fix this by re welding it and have had no luck, if I weld at low power I get pin holes that the coolant leaks out, if I weld at high power it's almost as if it cracks right along the edge of the weld and leaks.

I don't know how to fix this most say get another one is the only sure fire way.

 .

I guess I'm going to have to swap the 2 lower housings to make 1 good one of the 2.

.

 

The only success I have had at that type of repair was to drill a hole at each end of the crack, V-groove the crack, heat the whole piece (I forget how hot)  weld with a rod that has a high nickel content, put back into the heat and let it cool very slowly.  I did this to a shallow well  pump. Figured it would crack again as soon as the cold well water hit it but it held up.

Either way you do it you'll still have to take it apart.     

Too bad you have to deal with that problem.     I have always liked those old Cubs.    Rick



#54 DH1 ONLINE  

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Posted October 14, 2013 - 05:32 PM

Where's the pic of it sitting on Mazda wheels? Lol

 

Just for you Casey Mazda wheels on the back and 6 - 12 turfs on the front.

001.JPG


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#55 KennyP ONLINE  

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Posted October 14, 2013 - 05:36 PM

Just for you Casey Mazda wheels on the back and 6 - 12 turfs on the front.

attachicon.gif001.JPG

:bigrofl: :bigrofl:



#56 wvbuzzmaster OFFLINE  

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Posted October 14, 2013 - 09:55 PM

Just for you Casey Mazda wheels on the back and 6 - 12 turfs on the front.
attachicon.gif001.JPG


Careful, that could really catch on lol.

#57 Texas Deere and Horse OFFLINE  

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Posted October 14, 2013 - 11:46 PM

Doug, There are only 2 ways to fix the bottom tank. The first is to Braze it up and peen it with a chipping hammer until it is almost completely cooled off. The second has already been mentioned, you can weld it, but it requires a lot of pre-heating "RED HOT" and then weld with a high nickel rod, peening it quite a while as you weld it up. It then needs to cool back down slowly over several hours. I use an oven that I can once an hour turn down 25 degrees or so every hour over the next 24 hours. Drilling both ends of the crack will also help a lot on stopping the crack from running beyond the weld.

 

I reason your welds are cracking right next to the weld is because the cast iron shrinks by 10% as it cools and the weld doesn't stretch enough to keep up with the rapid shrinking of the casting causing a crack right next to the weld where the cast iron separates..

 

I hope this all makes sense to you.


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#58 DH1 ONLINE  

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Posted October 15, 2013 - 06:52 PM

Today after work I pulled the rad off of the lower housing, not sure what the proper name to call it, and found what looks like that pour in rad solder stuff, most of it hanging off the ends of the tubes in the rad.

I cant' see the inside of the crack and it's going to be hard to clean as its the upper corner across the front of the housing.

 

I don't have a set of torches for brazing.

If it was brazed originally before I got it it would probably not be leaking but someone ran 1 bead of weld along it before I got it.

 

1 - Can lead be pounded or penned into the crack from the outside?

2 - Can the inside of the housing be coated in a Marine epoxy to seal up the leak?

3 - Anybody got any other ideas?

 

Not going to try to do any more welding on it.

 

I really don't want to switch the housing with the other one I have, that tractor is a demonstrator.



#59 UncleWillie ONLINE  

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Posted October 15, 2013 - 07:24 PM

Have you tried to call a welding shop that might have a guy who is good at welding cast?

Edited by mybigwarwagon, October 15, 2013 - 07:27 PM.


#60 DH1 ONLINE  

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Posted October 15, 2013 - 07:27 PM

Have you tired to call a welding shop that might have a guy who is good at welding cast?

 

Not yet, thought I'd try 1 more time to do it myself.






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