Track Pin Diameter

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Cle Elum John
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Track Pin Diameter

Post by Cle Elum John » Tue Dec 11, 2018 2:01 pm

Does anyone know what the track pin diameter is for a 450? The master is welded in and I will try removing the weld with a carbide tipped hole saw. I need to know the pin diameter to get the right hole saw.

Thanks
John
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Jim B
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Re: Track Pin Diameter

Post by Jim B » Tue Dec 11, 2018 3:01 pm

Do you have the service manual for your 450? It should be in the spec section for the tracks. A 450B manual says master pin diameter is 1.3680 - 1.3690. Parts catalog shows same master pins are used in both, 450 and 450B. That is just the book info, no hands on verification to that info.

Cle Elum John
440 crawler
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Re: Track Pin Diameter

Post by Cle Elum John » Tue Dec 11, 2018 3:16 pm

I just looked at an online parts manual and it was not mentioned. I do have a shop manual. I should have looked there. Thanks
John
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Jim B
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Re: Track Pin Diameter

Post by Jim B » Tue Dec 11, 2018 3:59 pm

Hi John,

No problem. Do you have or have you used an Arc Air torch or the cutting/gouging electrodes available at most welding supply houses? The electrodes don't need a set like the Arc Air and will work on a regular welder of average size. Its a bit crude, but if the hole saw or grinding don't work for you those might. With a bit of practice, on scrap, you could get most of the weld without doing much more damage than the welding has already done; then finish cleaning it up with a pointed carbide bur. I would expect to replace the pin if I did this, as I would wash into the pin not the link.

Jim

Cle Elum John
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Re: Track Pin Diameter

Post by Cle Elum John » Tue Dec 11, 2018 8:43 pm

I was hoping not to have to burn it out. The hole saw is first choice. The grinder second. Using any flame or electrode cutting is a very distant third option. It does not sound like a precision tool. At least not in my hands.

Thanks for the help
John
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jsal
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Re: Track Pin Diameter

Post by jsal » Wed Dec 12, 2018 6:54 am

grinding is the easy way also have used a tungsten bit on a dremmel done it many times then re weld

JIM

Cle Elum John
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Re: Track Pin Diameter

Post by Cle Elum John » Wed Dec 12, 2018 1:15 pm

That settles it. Try the hole saw, use the grinder if needed, burn it out if everything else fails.
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Lavoy
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Re: Track Pin Diameter

Post by Lavoy » Wed Dec 12, 2018 3:36 pm

Pretty sure you are just going to trash a good hole saw. Where the weld blends with the master pin will be very hard and you hole saw is not going to like it very much. Grinding is a better option, best is to burn the end of the pin out to relieve pressure so it comes out easier.
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Parts and restoration for antique and late model John Deere crawlers.
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