420C tracks.

jimengel · Post by **jimengel** » Tue Oct 10, 2006 11:39 am

I am the owner of a 420c. It has been taken apart by someone else to fix a problem with the ring and pinion. They are missing parts of the teeth on both items. It was never put back together. It has been laying around for about 15 years like this. I aquired it and want to restore it for use in clearing the woods on my property. I have two questions.
1) is there a good place to aquire the ring and pinion for this at a reasonable price?
2) The tracks are my biggest problem. Since they sat so long in the weather they are like 16ft stiff boards. Only a few links bend. What is the best way to tackle these. My thoughts are to remove the shoes to make it lighter to work on. Then attempt to free the links with heat and a lot of musle.
I tried to remove the shoes and it took considerable time to remove three shoes along with a 6ft long pipe for leverage. Do you think a 1200ft-lb air gun would remove the bolts on the shoes?
Any recomendations would be most appreciated.
Thanks
Jim

Post by **Lavoy** » Tue Oct 10, 2006 1:56 pm

Depending on serial number, I might have a ring and pinion.
If they are that stiff, going to be real hard to salvage the tracks. Heating is not the answer, the pins and bushings are heat treated, and you could ruin them by heating. Best bet would probably be to lay the tracks in a mud puddle and keep them submerged for a few weeks. Then take them out, install them, and run them right away. Snow works well if you are in a norther climate too.
Lavoy

shinnery · Post by **shinnery** » Wed Oct 11, 2006 1:14 am

You might try a penetrating oil like "Kroil" from www.kanolabs.com on those tracks. I used it to free up a stuck Minne Moline tractor engine. Bryce

jimengel · Post by **jimengel** » Wed Oct 11, 2006 6:01 am

I believe the serial number is 92235. This is from some paper work I got with the 420. It is not off the plate since there is none on the machine. I am not positive it is the correct serial number. On the pinion I see the numbers 48-2792 on the gear end. It is a 7 tooth pinion with a 22 tooth spline shaft.
The ring is a 32 tooth gear.

On the tracks, are you saying that soaking the tracks in water will loosen them up?

Post by **Lavoy** » Wed Oct 11, 2006 8:02 am

That serial numer is consistent with an early 420, so could be correct. If it is, I have a ring and pinion on the shelf.
Yes, the water will loosen the rust. Rust comes from water/moisture, so nothing loosens it better than water. IF you get them loose, you will need to run them until the are completely loose, or the same thing will happen again.
Lavoy

jimengel · Post by **jimengel** » Wed Oct 11, 2006 9:59 am

Sounds good, how much are you asking? How do we proced from here?

Post by **Lavoy** » Wed Oct 11, 2006 7:30 pm

I would want to double check it for condition, and we need to make sure that you have a crawler in that serial number range. Send me an e-mail, and I will send you a list of questions on your crawler that will help verify serial number range.
Lavoy

jimengel · Post by **jimengel** » Fri Oct 13, 2006 6:05 am

I looked in this forum and saw that somebody wrote that the links should be +/- 3.2" I check mine and they are 3". Are these tracks still ok? I don't want to put a lot of work in them if they are shot already.

Post by **Lavoy** » Fri Oct 13, 2006 8:33 am

3" is technically 100% worn. If you have a loader crawler and use it heavily, I might worry, but otherwise you will likely be fine for as much use as you will ever see.
Lavoy

JD430C · Post by **JD430C** » Fri Oct 13, 2006 9:31 am

hi, if lavoy doesent have what u need i do.

andrew

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420C tracks.

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