JD 350 tracks and sprockets

shanty · Post by **shanty** » Tue Dec 20, 2011 7:32 pm

Pins and bushings are wore readly bad on the one side of the machine, and the sprocket isn't the best either. Can you take the track off and give it half a turn and hard weld the sprocket up to get a few more years out of it. Also how do you know witch pin is the (joiner) pin to remove? Only use machine to push out trees to clear land not alot of turning. Thanks

Also found a set of 450 tracks and sprockets are they any different?

Post by **Lavoy** » Tue Dec 20, 2011 7:52 pm

Turning the track won't accomplish a lot, shot is shot. Welding on the sprocket will just make it worse, the sprocket is worn because the pins and bushings are shot, and have worn the sprocket to match. Change the wear on the sprocket, and the rails will start to climb worse than they already probably are.
450 and 350 are completely different rails.
Lavoy

truck209 · Post by **truck209** » Wed Dec 21, 2011 1:33 am

Looking for service manual. Is a tech manual the same and what would be fair price for it. I Have A 1975 350 c Dozer and have replaced chains, sprockets, spring covers, one adjuster. Slowly trying to keep in good condition. You have a great web site I check it every day. Thanks

Post by **Lavoy** » Wed Dec 21, 2011 9:48 am

Yes, on older crawlers, they were called service manuals, about the time the 350's came out, they called them tech manuals.
Lavoy

tnturkey · Post by **tnturkey** » Wed Dec 21, 2011 8:50 pm

New pins and bushings are about 1200, and the new sprocket was around 150 last time I looked. The pins and bushing were installed at HeavyEquip in Knoxville TN

tnturkey · Post by **tnturkey** » Wed Dec 21, 2011 8:54 pm

taking them off and giving them a half turn is not very good, would only save you a couple hundred dollars and your pins and bushings would wear pretty quick. Best money spent would be to have them replaced. The track should have a Z link in it to take the track apart. if not, get a sledge Hammer and we used a Horse shoe stobb and drive a pin out. We welded a piece of Rebar on the stobb as to hold it out away in case you missed with the sledge hammer.

KenP · Post by **KenP** » Thu Dec 22, 2011 5:11 am

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tnturkey · Post by **tnturkey** » Thu Dec 22, 2011 5:31 am

Ken you would be surprised what a couple of Rednecks can do with a hammer....LOL......We drove a regular pin out of the 550 before we found the Z link. Z link is probably not the technical anme for the link, the link looks like 2 Z's laying on thier sides and they are bolted together, if I remember it has 4 bolts in it, you remove the 4 bolts and your track comes apart. It's a lot easier than the sledge hammer.

KenP · Post by **KenP** » Thu Dec 22, 2011 5:45 am

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jdemaris · Post by **jdemaris** » Thu Dec 22, 2011 9:33 am

Lavoy wrote:Turning the track won't accomplish a lot, shot is shot. Welding on the sprocket will just make it worse, the sprocket is worn because the pins and bushings are shot, and have worn the sprocket to match. Change the wear on the sprocket, and the rails will start to climb worse than they already probably are.
450 and 350 are completely different rails.
Lavoy

We had many customers who did not want to spend big money.
In some cases, they'd have the pins and bushing turned and use all the rest of the undercarriage as-is. Often they'd get a lot more use out of the crawler until everything was shot in the undercarriage. I've seen them run until the teeth were gone from the sprockets and they turned inside the chains. As compared to cutting a link out - turning the pins and bushings can be a better alternative. Is it proper fix for a worn machine? No. Will it get the track adjusters pushed back down and add more life? Yes.

I can't agree that is sometimes isn't worth doing. We did many and some of the crawlers got a lot more use.

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JD 350 tracks and sprockets

JD 350 tracks and sprockets

1975 350 c Dozer Service Manual

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