To replace the shaker drive pivot, remove the chaffer sieve, shoe sieve and chaffer rail assembly. The two lower bolts are carriage bolts and the holes have to be squared out with a file from the inside. The head of this bolt will come into contact with a screw on the side of the chaffer rail,these screws must be removed and turned around. These supports will not fix your problems and will only add to them, weld and reuse the original channels after installing the csr kit,(cleaning system repair kit). I recieved a patent on this kit on Dec 21 04. It sells for $270 dollars and I guarantee this kit will fix all problems with breakage on the cleaning system on all long sieve combines. Contact me at 701-755-3326 or 701-629-1469. Check out www.csrkit.com for more info.Thank you Gordon