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How do you come up with the number on undercarriage condition

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D Smith

12-02-2002 06:48:53




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i was recently giving an old crawler from my father in law. i know the shape it is in is more than a person could expect to find in an old antique that has been setting. the enging is redone and ready to run. all is left to do is paint it. but my qeustion is, i would like to figure out the condition it is in by numbers. and i never have a need to know %'s before. a friend has talked me into doing a website about the restoration of it. and i need to know how to come up with the numbers to out on it. thanks for any help D Smith

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Heat Houser

12-03-2002 19:41:16




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 Re: how do you come up with the number on undercarriage condition in reply to D Smith, 12-02-2002 06:48:53  
To measure an undercarriage and determine the percent remaining you will need to know two dimensions, new and worn out (limit of use) and then calculate from there.
If you look at the track chain, you need to measure the pitch which is the center to center distance from one track link pin to the next one. The chain has to be tight to get a good measurement and you should measure across 3-4 links to get an "average" wear. Pitch tells you how much the pin has worn into the bushing or in other words, how much the chain has stretched.
The next item is link height which is measured from the shoe mounting surface to the surface which contacts the rollers. The final item is the bushing wear. This wear is caused by bushing to sprocket contact.
To get the "new" dimensions, contact a constrution equipment dealer and ask. Most undercarriage wear charts will convert a measurement into a percent value.
Good luck!

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gatractorman

12-03-2002 01:37:10




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 Re: how do you come up with the number on undercarriage condition in reply to D Smith, 12-02-2002 06:48:53  
You have to know the specifications on new parts then measure yours to see how much has been used.



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Lavoy

12-03-2002 06:44:49




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 Re: Re: how do you come up with the number on undercarriage condition in reply to gatractorman, 12-03-2002 01:37:10  
Gatractorman is dead on, unfortunately must guys justlook at it and guess, some with no idea of what 100% undercarraige even looks like. Also seems to be a rather large spread between the descriptions if the guy is buying or selling.
Lavoy



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DB

12-06-2002 08:51:30




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 Re: Re: Re: how do you come up with the number on undercarriage condition in reply to Lavoy, 12-03-2002 06:44:49  
How funny, "Just guess". I was going to suggest throwing chicken bones on the ground to come up with the voodoo guesses that I see going on out there. Its good to see that some folks on this board know the correct way!



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