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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

440 John Deere tracks. how to break?

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David-N-GA

10-21-2004 06:39:07




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I had a series of posts a little earlier about parts for the final drive on a crawler I have. I haven't been able to find a serial # on this machine, but did finally get copies of the schematic of this area. I was wondering if someone could give me any information on how to break the tracks so I can get the track sprocket off and out of the way. Also, does the axle simply slide out of the big gear or is there something that holds it on?

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Lavoy

10-23-2004 20:31:28




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 Re: 440 John Deere tracks. how to break? in reply to David-N-GA, 10-21-2004 06:39:07  
Unless your 440 has had 350 rails installed on it, or someone had put drive master pins in your original rails, there will be a pin with a snap ring on one end, and the other end will fit in a slot in the master link.
Take the 1/2" bolt out of the top of the track adjuster (assuming you have hyd adjusters), then use an allen wrench to loosen up the set screw that is down in the hole. Do not take the set screw out, or if you do, do not lose the check ball that will be expelled with the grease. Use a comealong or something else to compress the track adjuster.
Run the track around until the master pin is at about 7:00 on the sprocket, remove the snap ring and drive it out. If it is really tight, you can heat the link around the pin and it will come out easier.
The is a retainer that holds the axle into the sprocket. Take the inside axle cover off, and you will see two 1/2" bolts that you will need to remove to pull the axle. There is a washer inside of the bearing that is going to drop into the bottom cover when you pull the axle, do not forget about it.
Lavoy

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JimInOz

10-23-2004 02:38:34




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 Re: 440 John Deere tracks. how to break? in reply to David-N-GA, 10-21-2004 06:39:07  
As I work alone,I tend to release all grease outa the front idler....& simply pry/force the track right off the machine.Of course I use a tractor/crane jib to help do the hard stuff,but it beats stuffing around with hammers/gas-axe.Just did 350 steering this way.If you're gonna hit pin out,make sure master pin is up against sprocket or idler,to stop any movement.Also make a "T bar" for the job.You can sometimes heat the area near pin...then throw bucket of water at it to snap it loose.My way is OK on small stuff...don't fancy my chances with D6.There's many guys who do it better,but I'm happy doing it this way.

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David-N-GA

10-23-2004 19:15:44




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 Re: 440 John Deere tracks. how to break? in reply to JimInOz, 10-23-2004 02:38:34  
how do you release all the grease from the front idler? We've tried prying the track off the machine, but seems there's too much tension to get it to go over the spindle.



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Pete/ME

10-22-2004 03:12:59




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 Re: 440 John Deere tracks. how to break? in reply to David-N-GA, 10-21-2004 06:39:07  
Look for a pin (master pin) with a dimple in the end, if its like the track on my JD350. That's the one that has to come out.



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David-N-GA

10-22-2004 19:39:07




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 Re: 440 John Deere tracks. how to break? in reply to Pete/ME, 10-22-2004 03:12:59  
owww! I've found that pin with the dimple in it and have beat and frammed it for about an hour with no luck. I sprayed it with penetrating oil and still nothing. I've always heard those things were a pain, but never experienced it until now. I saw where one guy was telling me about using jacks and such, but I couldn't follow how he was explaining. Any more suggestions? It doesn't appear to be welded in place. One man locally was telling me that the pin has to be turned 180 degrees for it to come out since it's wore on the bottom side, but I don't see how the pin could be turned being how little of it is protruding beyond the track. Nothing to grab ahold to.

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Steve G

10-23-2004 07:36:30




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 Re: 440 John Deere tracks. how to break? in reply to David-N-GA, 10-22-2004 19:39:07  
I have worked on crawlers for many years and found that most of the time you have to heat the link that holds the pin. You have to get it red hot. With it hot yet pound on the pin and it should come grudingly. You may have to heat several times. This works better with two people so you can really swing the maul.



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David-N-GA

10-23-2004 19:06:35




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 Re: 440 John Deere tracks. how to break? in reply to Steve G, 10-23-2004 07:36:30  
I'll have to try the heating then. Would just a regular torch you can buy at the hardware store heat it up hot enough. The kind that cost only a few bucks and are disposable when finished? I guess if the pin was too easy to come out, it would get lost all the time huh? LOL! Now what I'm worried about is that I might have "swoll" the end of the pin from all the beating I've done on it with hammer and punch. btw..if I get this pin out, will I have to heat it all back up to get it to go back in?

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scott in wa

10-21-2004 14:41:27




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 Re: 440 John Deere tracks. how to break? in reply to David-N-GA, 10-21-2004 06:39:07  
One pin is differant than the others, should have a clip on the inside holding it on.
Could be tack welded like mine was. ground OFF the weld, and beat it out.
WATCH YOUR FINGERS, TRACK WILL PINCH OFF A FEW...

SCOTT IN WA.



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David-N-GA

10-23-2004 19:19:44




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 Re: 440 John Deere tracks. how to break? in reply to scott in wa, 10-21-2004 14:41:27  
I just reread all the posts on this, and had overlooked where it said a clip should be holding this pin in place! I'll have to go look again tomorrow and see if I can find this clip, but I didn't remember seeing one last night while I was pounding away trying to get the pin out! What type clip might this be? one of those C type clips or something? I'm gonna feel real stupid if that's what the problem is, but I don't think mine has a clip unless it's somehow hidden from sight, because I looked at that pin from every angle trying to figure out the next way to get it outta there!

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David-N-GA

10-21-2004 16:58:27




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 Re: 440 John Deere tracks. how to break? in reply to scott in wa, 10-21-2004 14:41:27  
Thanks Scott, I'll look tomorrow and see if I can find it. Knowing my luck, it's on the bottom!



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Bernie in MA

10-21-2004 18:09:40




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 Re: 440 John Deere tracks. how to break? in reply to David-N-GA, 10-21-2004 16:58:27  
My 420 has holes in the sprocket. I put a piece of 5/8 threaded rod thru a hole and another piece out side the track, connected them across the ends with 2 pieces of drilled square tube. Made the rods long enough to get a 20-ton jack with a short piece of 3/4" rod welded to the top in behind the master pin. Popped it right out.



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kristopher

10-24-2004 11:33:55




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 Re: 440 John Deere tracks. how to break? in reply to Bernie in MA, 10-21-2004 18:09:40  
We have a 450 B, we made a handmade pin driver out of 5/8 steel. In hte 450 B manual it tells you how to make a pin driver. It takes two people, a lot of patience, and a lot of manpower. Good luck.



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