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Old 09-08-2011, 08:57 AM
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Default John Deere MC crawler track pin & bushing dimensions anyone have ?

Neighbor has a set of worn out tracks, I can carve up new pins and bushing's
(and rig up a small log splitter type machine to remove and set new)
But I can't find anything detailing the dimensions of what's needed.

I've poked around a bit on some forum's, but am getting a headache.

FWI am told, J.D. will sell you new pins and bushings, nicely hardened
and ground, but at quite a price.

BTW these seem to be a popular model, I know of 3 other in the area,
so if I could come up with a fix, it might be good.

Last edited by digger doug; 09-08-2011 at 09:24 AM.
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Old 09-08-2011, 11:56 AM
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There are after market pins and bushings however, when the labor is added in it might be cheaper to get new after market assembled rails (add you old track plates to it) or complete tracks. You might try the many JD sites or possibly www.antiquecaterpillar.net . They won't flame you like some of the other sites for mentioning another "Brand".
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Old 09-08-2011, 12:01 PM
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Norm,
None of these machine's are mine, just trying to help the nieghbor out
(and maybe make some parts to sell to others).

From what I hear, nobody want's to pony up allot of money 'cause
these machines are very old.

My plan, is to make new bushings and pins from 4140-ht right off the screw
machine (Rc 28-30).
Granted J.D. will sell you hardened and ground (to 2 points harder than the back of superman's head) bushings, but at a price
that no-one want's to invest in an old machine.

Yes, 4140-ht bushing's won't last as long, but I figure these machines
arent' getting nearly the hours of use either.
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Old 09-08-2011, 12:24 PM
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Check with "Oz Dozer" on the ACME site I'd bet that he would have the specs. If he doesn't somebody else will jump in with them. Shoot, I'll go over there and see if I can find out something.
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Old 09-08-2011, 12:25 PM
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Thank you very much Norm.
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Old 09-08-2011, 05:23 PM
redfarm redfarm is offline
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you may want to see how much you can oversize them to help compensate for sprocket wear. just a thought.
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Old 09-08-2011, 05:50 PM
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While you are waiting (got to wait for the other side of the world to check in) I found the parts manuals for the for the MC, 40 and 420.

http://www.jdcrawlers.com/messageboa...pic.php?t=6090

Should get you some useful information.
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Old 09-12-2011, 06:03 AM
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Quote:
Originally Posted by redfarm View Post
you may want to see how much you can oversize them to help compensate for sprocket wear. just a thought.
Yes that would be very easy for me to do, just adjust a cutter and
you'll have .010 oversize or whatever you want. Figure I may need to make
a series of oversize pieces (.005 over, .010 over, .020 over and such)
in case we find the holes worn.

Norm, tnx for the link, I drove down to my local J.D. Dealer, and
they printed me out that page, so at least now I have an idea at
what I am looking at.
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Old 09-12-2011, 07:07 AM
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Doug, Lavoy at JDcralwers should be able to supply you with that information. Pins and bushings for the older crawlers are the big bugaboo at the moment. I will need a set for the 420 when I am done with mine. Lavoy might be able to supply your neighbor with a set of pins and bushings for the MC.
I am thinking of having my sprocket rims changed over to JD 350 rims and then run 350 rails instead of fighting with the old worn 420 rails.
I had talked to a friend about having him wire EDM the old rims off my sprockets but the sprockets are too big for his wire EDM machine. So the hunt is on for a Do-all bandsaw large enough to handle the job.
Dan.
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Old 09-12-2011, 07:15 AM
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This is getting corfusing.....

I want to make the pins, not buy them. I have 2 automatic
screw machines, and think there might be a market for lower cost
pin/bushing's for the antique machines.

Why do you need a wire EDM to remove the sprocket ?

Doesn't it just press off ? If you need some cylinders/pumps
I can bring some down, I've got a couple of 55 ton units.
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