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Bad stuff weld up

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Scott in SC

07-27-2002 05:56:38

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Decided to order a .125 oversize spline driving disk for the 37 B with crank/disk wear. I feel I can dress the remaining splines down to work, but the shaft has additional wear at the rear of the splines on one side only as the old driven disk seems to have wobbled on the shaft. I would like to weld it up in the tractor and grind it back down to fit the new disk tight. Gonna coat the repair in JB weld when reassembled. Got any tips on the weld up or repair in general? What rod works best, etc.

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F-I-T

07-27-2002 09:48:53

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Re: Bad stuff weld up in reply to Scott in SC, 07-27-2002 05:56:38

Scott:

Years ago I had to weld up a crank for the same reason. An old tool and die type told me to remove the carbon center electrode from a flashligh (drycell) battery, and sand them to the slot size on a belt sander or mill them on a Bridgeport, and put them in the slots. The weld won't stick to carbon, so when you're through welding up the splines, you have straight true spline and slot sides, and all you have to do is to grind down the tops (OD).

Later I heard the same property was true for copper, and bought some copper stock and filled all the slots on another crank on a "B", and held them tight with a hose clamp around the outside. It worked really well.

Since then I have welded up key ways and such, and had good success.

You might want to give it a try. You might be able to buy the carbon stock at a welder's supply.

Good luck !

Frank-in-Tallahassee
70D // 855

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Mikey G

07-27-2002 12:51:24

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Re: Re: Bad stuff weld up in reply to F-I-T, 07-27-2002 09:48:53

Scott atrick I use to fill holes insheet metal is along the same line as FITs fix .I use a chunk of brass round stock held on the back side of the hole and weld the hole shut the weld dosent stick to the brass you should be able to use brass bar stock in the splines .

Good Luck
Mikey G

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Slofr8

07-27-2002 07:14:43

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Re: Bad stuff weld up in reply to Scott in SC, 07-27-2002 05:56:38

Scott, last fall I discoverd the splines on my newly aquired B were worn half down. Drive disc also. They had been shimed with nails. I didn't want to replace the crank untill I found out if the old girl had any more serious problems. I found a good drive disc and decided to try and weld the crank myself. This was only intended to be a temparary fix. I'm not a very good welder but managed to get the splines built up using 60/13 rods and ground into shape, one at a time. Quite time consuming. I could have used harder rods but wanted a degree of "grindability". (I made that word up!). The trouble I found was that after I had the first one to fit tight, I couldn't tell if the next one was tight or loose as the first spline would prevent the disc from moving. After I got them all done I decided not to risk spoiling the good drive disc and put the old disc on with a coating of JB weld. It went on very tight. The tractor was then finished and has even been in a parade. I have just finished "brush-hogging" 15 acres with it. (some fairly rough stuff to). I kept cheacking the dirve disc but it has not loosened at all. When I find a good crank and she finally loosens up I'll change it out since the rest of the tractor seems to be in great shape. Now I'm not saying this was a good or even an acceptable fix but it seems to have worked for me. Would I do it this way again? Probably not. In retrospect I would have changed it right off or had a machine shop do the job and would have had a permanent fix. Hard tellin' not knowin'. Good Luck.

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mike

07-27-2002 07:15:44

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Re: Bad stuff weld up in reply to Scott in SC, 07-27-2002 05:56:38

Go ahead and weld the splines up then get your die grinder out and dress up the splines to make them fit your driving disc. Forget the jb weld, machine your new splines right the first time so that eveything fits tight then you won't need to glue it on. It can be done with some patience and a steady hand.

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