JDcrawlers Messageboard

To add to Stan's list; the JD construction bookstore doesn't show an Operator's Manual for the 831. It does show a service manual for the 831 loader which is publication # SM2032.

Contact Lavoy (postmaster@jdcrawlers.com or 701-361-1006 during CST business hours), he sells manuals from his store.

If the carrier won't move in the cam, it could not be adjusted, as you found. It should move easily inside the cam. Loosening (even totally remove) the capscrew in the slot of cam should let the carrier be removed from the cam. There should be a stud about 180 degrees from that capscrew which just a...

Can you separate the carrier from the cam?

So, you have the carrier and cam off the tube? What do the inserts in the cam and quill look like? Nice smooth cup shape, smooth taper, not beat out? What do the balls look like? No flat spots, round and smooth? If you are talking about pulling the tube, I would not do that without having a new one ...

Is it possible the capscrew that locks the carrier to the cam, when adjusted, has one that is too long in it, has fouled the tube, and that is preventing removal? If you don't have that capscrew out, try removing it and separating the carrier and cam.

Just like Bill's video, once you have everything unhooked (linkage and 4 springs) it pulls off. It may have some rust, wear grooves, or burrs holding it, you just have to work it off. The tube the carrier slides on should stay in the quill.

Don't say that. I only knew about that as I have a 2020 (180 gas) open for a broken piston and found rolling the front main out in place wasn't practical because of the block for the idler mounting. The other bearing all looked very good and checked out ok so we are going to take the chance on it fo...

If the cam is turning when you pull the lever it is free, which is good. To remove the cam; once the final, with steering clutch is off, unhook the linkage and 4 springs from the cam. It should come out, there might be some resistance from wear and rust but it shouldn't be difficult to remove. The b...

Seal item key # 14 in the final drive
https://partscatalog.deere.com/jdrc/sid ... gId/200789

Seal item Key # 6 in the ring gear assembly
https://partscatalog.deere.com/jdrc/sid ... gId/171039

It sounds like there is something missing or out of place with the inserts and balls located between the quill and cam. This video It is a MC but the parts and theory are the same, so it may help (thanks to Bill, aka PossumFarms for the video). When you pull on the lever the cam should ride up on th...

When you pull the lever, the cam it turns, is supposed to ride out on the balls and inserts (which act like ramps) located between the cam and the quill. With the cam fully back into the quill (balls centered in the cup of the inserts, you loosen the capscrew that is in the slot of the carrier and m...

On the flat with free rolling tracks on the CAT probably, if the 450C tracks can bite in and not slip, the the CAT tracks don't plow in. However 4 miles and uphill in places, I don't think you will have great success.

Good to hear you found it, and you are correct it is a 1980 unit number. Good luck.
Jim

It is possible, however there are many variables that come into play as to whether or not a 450C would pull a larger dozer in any given case. Are you looking to pull one or just asking in general? If you are looking at pulling one tell all the specifics about the dozer and terrain. If just asking in...