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Cracked Bellhousing

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greenbank

08-08-2007 19:16:17

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I'm doing a "carport restoration" of my TO35, so I'm not splitting the tractor, painting it with anything other than close approximations of the green and gray out of spray cans, etc., but I am taking care of some mechanical issues. I found this crack in the bellhousing where the starter sits. Is this serious, or can it be left alone for another few years of light use until I do a "full boat" restoration?

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John (Ohio)

08-10-2007 17:00:17

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Re: Cracked Bellhousing in reply to greenbank, 08-08-2007 19:16:17

There is a process called metal stitching for cast pieces. I haven't used this but I did use this company's Full Torque thread repair for head studs in my TO30 block. They are extremely helpful and knowledgeable. Take a look at the examples they have. If I ever need to repair a cast piece this would definitely be the way I would go.

Lock N Stitch

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Jerry/MT

08-09-2007 14:28:13

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Re: Cracked Bellhousing in reply to greenbank, 08-08-2007 19:16:17

I agree with Jim. Stop drill the crack but do both end so it doesn't propagate each way. Can't tell you how big to make the hole. If it was me I'd keep it to no more than 3/16" but that's a SWAG.

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Jim in OH

08-09-2007 11:10:16

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Re: Cracked Bellhousing in reply to greenbank, 08-08-2007 19:16:17

I don't think that I would repair it right now (or ever), but I would clean it up and then see if I could determine where the end is [ e.g., dye penetrant or even just solvent (naptha or paint thinner] to darken the crack], then I would drill a clean hole (5/16 or larger) at the end of the crack to stop further propagation. Left unchecked, it is likely to keep moving until something is in two pieces. Cosmetically, if you don't like leaving a hole, fill it with body putty or epoxy, but filling it is not going to make it stonger.

Jim

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Bob (Aust)

08-09-2007 10:46:21

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Re: Cracked Bellhousing in reply to greenbank, 08-08-2007 19:16:17

Looks like a starter bendix drive came apart at some time in the past? Also looks like it has been there for many, many years. I would not imagine it would cause any problems.

Pity the US tractors were cast steel, maybe harder to weld repair? The British tractors were cast aluminium - I had a cracked timing case cover which was weld repaired and the TIG welder said it was excellent quality aluminium and welded very easily.

Only reason I had mine repaired was because I wanted to see what caused the crack and it was weeping oil. (Impact marks indicated a governor weight may have given way in the past, which had been replaced.)

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greenbank

08-11-2007 14:14:46

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Re: Cracked Bellhousing in reply to Bob (Aust), 08-09-2007 10:46:21

Your theory is probably right; I found all the teeth from a previous starter's bendix in the bottom of the bellhousing.

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