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Crawler undercarriage % evaluation

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polk crawler

05-29-2002 07:21:39




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Please...someone enlighten me, a newbie, how undercarriage % evaluation is determined. My impression from reading postings is that this is a very important and vital bit of information in determining overall condition and price of a crawler. Thanks to whomever responds. PC




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clark

06-02-2002 19:40:35




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 Re: crawler undercarriage % evaluation in reply to polk crawler, 05-29-2002 07:21:39  
they way i have determined the precentage of wear for many years on the tracks has been to feel or look at the bushings and the rails to see how worn they are, also you can tell how much the pins are worne by loosening the tracks and takeing a bar and get in the rail link and and pry back and forth to determine the play( wear ) useually the rails that run on the rollers and idlers should be twice as thick as where the crousers bolt on.. the grousers have nothing to do with the percentage of wear on the rails and pins & bushings..a set of grousers should wear out atleast 2 sets of new rails, the pins and bushings can be replaced atleast 2 times also before the rails are shot.. if you have to replace the rails with new ones then i would sudjest replaceing with S.A.L.T rails.. sealed and lubercated pins & bushings.. the cost it about 1/3 more but in my experionce the S.A.L.T track will go 4 times as many hours and standard tracks..and also the performance of the dozer is much higher because of less friction in the tracks.

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DaleIN

05-29-2002 15:27:59




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 Re: crawler undercarriage % evaluation in reply to polk crawler, 05-29-2002 07:21:39  
Hi PC,
Truck's posting was great. I think it was funny because its SO true. Even though he was being facetious through most of it, you'd be surprised how many different interpretations of undercarriage wear there are. Even when someone is trying to be honest, its tough to get two experts to agree on condition just by "eyeballing" it.
The only 2 ways that I know to get an accurate reading of UC is to measure it, and compare it to a Berco (or other UC supplier) book. The book shows you how to measure, and gives specs for percentage of wear for most machines. The other way is to use the gauges used by the equipment manufacturers.
The only problem is, these books (or gauges) are not something just anybody can lay their hands on. And remember, there can be some of a component left, and it still be considered 100% or 150% worn out.
I think most people are stuck with finding someone who knows crawlers, and trusting their judgment.

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countryboy

05-29-2002 17:45:06




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 Re: Re: crawler undercarriage % evaluation in reply to DaleIN, 05-29-2002 15:27:59  
boy that is not kidding i took a cat mech with me when i went to look at mine. he said the undercarraige was in pretty good cond. well either john deeres an cats are alot different or this guy who is a freind of mine didnt know what he was talkin about cause i up to 2600 hundred in parts for my undercarriage witch was shot.
what i have figured out is, if its new then plan on replacing it



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Bob /Ont.

05-29-2002 15:21:35




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 Re: crawler undercarriage % evaluation in reply to polk crawler, 05-29-2002 07:21:39  
Polk it is the % of metal remaining between new and the rebuild limit. You need a chart to determine this. Check out WWW undercarriage.ca, if this doesn't work check reply to OLDTIMER, I posted it there too. It should help you.
Later Bob



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Bob /Ont.

05-29-2002 15:24:32




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 Re: Re: crawler undercarriage % evaluation in reply to Bob /Ont., 05-29-2002 15:21:35  
www.undercarriage.ca



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Bob /Ont.

05-29-2002 15:24:25




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 Re: Re: crawler undercarriage % evaluation in reply to Bob /Ont., 05-29-2002 15:21:35  
www.undercarriage.ca



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Truck

05-29-2002 10:13:55




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 Re: crawler undercarriage % evaluation in reply to polk crawler, 05-29-2002 07:21:39  
Well if it is someone else's machine that they're selling, to get the % figure in the ad they do this...Divide the current height of the grouser by the original new height of the grouser..So a grouser that was originally two inches high would be at 50 percent worn if it is now only an inch high.
That is the starting number. If it's yours,and you are selling, do this:
If the caller has never operated a dozer before and has very little knowledge of equipment.. Tell him it's almost new underneath.COmpared to the earth it is setting on, it IS almost new!
If the caller seems to know what a grouser is, tell him it's at 90 percent, and when he shows up and questions your judgement, say, "all these old guys had loads shorter grousers than most guys think.." Maybe it WAS a special order shortie special?
If it is a construction equipment dealer calling, tell him 75 percent. (You can't get away with much higher than this or the guy will think you're a doofus!)
If it is a family member, Tell him, "didn't Dad replace the undercarraige on this way back in '06?" (Chances are a family member isn't gonna buy it for the crazy high price you want for it, but you may as well humor him just in case you can't find a, um customer...)
From my buying experiences it seems lots of guys follow this technique. Especially the ones who do the enamel bath rebuilds..;-)
Just a little bit of tongue in cheek.....

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