How to Adjust The Rear Crossbar

[Frankdozer]

I've been ignoring a 4 year old problem on my John Deere 455D . How do I adjust the rear crossbar ? On both the left and right side sprockets, the inside of both sprockets is hitting against the inside edge of the track roller. In my parts manual I noticed that the brackets ( AT52179 on the left and right on the crossbar ) have a retainer ( T21230 ) and in front of each retainer it appears that there are shims ( T21231 ) installed. Is it as easy as just adding or removing these shins to center these sprockets ? And if I don't have factory shims, can I just cut pieces of sheetmetal in the same shape ?
Thanks,
Frank

[jsal]

I have 350 and had same issue made shims from some flat stock I had around was not hard to do


JIM

[Frankdozer]

I searched online and cannot find the adjustment procedure. Could someone post the directions or the correct way to do it? Since I have to go out of town for business I'll probably order the shims so I'll have them when I get back.
Frank

[jsal]

I was able to move them with a large pry bar and large chisels wedged in so you can get the shims in look in the service manual if you have one


JIM

[Frankdozer]

It's about time for me to purchase the repair manual so instead I purchased the repair manual on CD. It will be here next week.
Frank

[Frankdozer]

Just received my CD for John Deere Manual TM1291 and maybe I missed it but where is the rear crossbar / sprocket adjustment section ?
Thanks, Frank

[77 Ford]

I just looked thru the manual for my 450c and it does not have an adjustment procedure either. All it says it to remove it keep shims in the proper sequence and then install them back.

I guess they assume it will never need adjusted after the factory does it.

Sounds like you're on your own as far as the manual is concerned.