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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Lookin' at a 40c

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farmerboy

01-02-2007 17:20:12




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Hey all,

I know there's a LOT to look at on a crawler before making the leap an buying one. I am not at all familier with a crawler but can look over a tractor pretty accurately.

That being said, I was hoping for some pointers on what to look for when looking at a 40c. This is "wanted" dozer, not a "needed" one. Its biggest project would be to grade the field road.

I'm in the very early stages of my search and plan on doing alot more research before I put good money down.

thanks

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Case450

01-06-2007 14:32:30




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 Re: Lookin' at a 40c in reply to farmerboy, 01-02-2007 17:20:12  
When an undercarriage is worn, it means the chain (what the pads are bolted too) are stretched. The wear and tear of the undercarriage (the tracks and all associated parts) wears down the steel on all the parts. The sprocket teeth are not as sharp or as long as new ones. The frame rails are worn thinner wear the front idler wheel is mounted. The chain is worn on the edges. The shoulders of the rollers are rounded and worn. What would help you (it helped me understand) is to go to a dealer and look at a bulldozer with a brand new undercarriage and note the edges and wear areas and compare with the crawler you are looking at. HOpe that helps man.

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original possum

01-04-2007 09:54:17




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 Re: Lookin' at a 40c in reply to farmerboy, 01-02-2007 17:20:12  
It will be worthless for grading if it has a 3-roller frame. The 100 reversible toolbar that mounted outside is awful for about anything in front of the tractor. The "cheap" inside blade may be a JD and may do better than it looks. It will have no angle or tilt but will grade if you have a 5-roller frame. Except for adjusting the tracks or pulling the starter the 40's are a piece of cake to work on.

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Lavoy

01-03-2007 19:53:34




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 Re: Lookin' at a 40c in reply to farmerboy, 01-02-2007 17:20:12  
Undercarraige wear percentages are highly subjective depending on the opinion of the guy selling, or the guy buying. If you did an a actual undercarraige inspection using the factory inspection chart, I would be that what is called a 50% undercarraige would be a 0% undercarraige.
Look at how thick the rails are themselves, and if there are any links starting to break. Look at the pin bosses on the rails to see if the are worn off at all. If they are, the rollers are worn out. If you measure across 5 pins (4 links) 23" is new, 23 1/2" is 100% worn.
Hope that helps you some,
lavoy

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troy21

01-03-2007 18:09:37




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 Re: Lookin' at a 40c in reply to farmerboy, 01-02-2007 17:20:12  
try www.crawlerheven.com, they have a wear limit chart for many different dozers, and that way u can measure the tracks. they also have good info, hope this helps u a lil



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oldcraneguy

01-03-2007 13:23:19




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 Re: Lookin' at a 40c in reply to farmerboy, 01-02-2007 17:20:12  
Im no expert on dozers(see name) but my brother tells me that when tracks are at 50% they turn the track pins 180* and switch the sprockets so that the pressure is on the worn surfaces when in reverse instead of forward, accordingly it would seem a dozer with 50% undercarrige would have pins with alot of wear on one side and very little on the other and also have drive sprockets with one side of the teeth still good, also I would pay close attention to the rails(links between pins) to make sure theyre not rounded so much that they wont stay on the rollers and front idler during a turn. And of course make sure the track frames themselves arent rusted so thin as to be weak....Good luck...Don

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Lavoy

01-02-2007 20:04:34




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 Re: Lookin' at a 40c in reply to farmerboy, 01-02-2007 17:20:12  
Always buy an undercarriage, it will bury you the fastest, if it is shot, walk away. Check the finals to make sure they have not been blown and welded. Check the track clutch housings where they bolt to the sideframes and see if they have been broken.
Lavoy



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farmerboy

01-02-2007 21:16:14




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 Re: Lookin' at a 40c in reply to Lavoy, 01-02-2007 20:04:34  
Hi Lavoy,

When the guy says the undercarriage is "50%", how do I determine if he is accurate? Does this mean the metal has been worn down to half its thickness? Do I need to bring along a caliper and start measuring how much metal is left?

This particular 40 has not run in two years and has been sitting outside. It looks to have some sort of cheap, lightweight blade connected into the inside of the frame vs. the outside like I've seen in all pics of "40C"s. It does have an underslung muffler and the factory grille guard.

I realize I sound like a doofus but don't know anything about crawlers yet. I don't suppose you'd know of an in-depth book on deere crawlers. All my books cover the ag tractors heavily and talk of the crawlers only in passing.

Thanks for your patience.

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