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Side gurder bolts snapped....Help!

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Simon D

04-16-2001 04:24:38

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I am currently attempting to restore an early sixties Super Major. I think that the tractor has been used for loader work for the majority of its life and has therefore seen a lot of action.

To aid the cleaning of the tractor I have dismantled it from the back, forwards taking off any bits that obscure the main tractor castings. This process was going well until I removed the side gurder plates that join the main chassis with the front weight/axle mount. Of the eight bolts (four on each side) that go into the engine block four (two on each side) have snapped off and couple of the others have worn away the thread in the block. The bolts did not rub off as I removed them but were already broken.

The question, therefore is, has anyone had a similar problem and how did they overcome it?

A second question which I think I know the answer is, does anyone know any tricks to remove a broken off 'EZ out'? (I think you can probably guess what my first line of attack was)

Thanks

Simon

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Bill

04-16-2001 06:13:41

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Re: Side gurder bolts snapped....Help! in reply to Simon D, 04-16-2001 04:24:38

I often have this problem (not the easy-out one) with snapped bolt removal. The fastest and most reliable way has been to weld a nut or heavy flat washer to the end of the snapped bolt. The intense heat of the weld tends to shrink the bolt and loosen the bond of rust. This should be done by a skilled welder as a strong bond and no damage to adjacent areas are important. Don't distress yet if this snaps the first time and must be repeated for the very stubborn ones. I'd perhaps try heating the easy out with an oxy-acetylene torch then try to "work" it with a small punch and small hammer. Even if only a portion comes out then do the same process with welding a nut or flat onto this bolt too. Good luck and good patience as is always useful with these "wrinkles". Bill

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04-18-2001 03:48:05

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Re: Re: Side gurder bolts snapped....Help! in reply to Bill, 04-16-2001 06:13:41

Bill said "The intense heat of the weld tends to shrink the bolt...". I'm splitting hairs now but that is not correct. Actually the heat makes the bolt expand, not shrink. I think it is called the thermal expansion or something. The reason why the bolt is loosening is that the hole, where the bolt is, expands more than the bolt does. They attach train wheels to the axle by this method: they heat the wheel and when the hole gets bigger they put the axle in and let it cool down (the diameter of the axle is bigger than the hole when not heated).

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Bill

04-18-2001 05:03:24

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Re: Re: Re: Side gurder bolts snapped....Help! in reply to RH, 04-18-2001 03:48:05

I 100% agree that heating expands metal but it's after cooling I refer to. It is possible to straighten a shaft or beam by heating areas on the stretched side then letting it cool thoroughly. I have straightened 5" dia stainless steel propeller shafts this way. Works on smaller sizes too. This is using no outside force of a press or such. You musk realize how well a bead of weld inside of a difficult bearing race releases it from the bore. The weld bead is pulling the race in as is metal adjacent to the weld that reached extreme temps as the hub never achieved this high temp. I hope I've explained my self clearly and I still agree with your analogy on the train wheels. It's just that you can expand or shrink with heat when desired. Maybe someone else can reword this to be more effective. Thank you, Bill

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04-19-2001 03:30:25

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Re: Re: Re: Re: Side gurder bolts snapped....Help! in reply to Bill, 04-18-2001 05:03:24

Clearly you are aware of the thermal expansion. Your earlier message gave me the impression that you think that the heating shrinks the bolt. I didn't understand it right, sorry.

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