tf 44 shaker bushings/spacers exchange

We bought ourselves an old TF44 combine and after inspection noticed that the spacers/bushings of the shaker table are missing on right side and almost destroyed on the left side. Right side was not much of a problem to exchange them, but the problem is the left side, since you have only a small window that can be opened and you basically see only 2 screws, and it's even hard to touch the far spacer not even talking of trying to unscrew it.
I'm interested how can we exchange them since it doesn't seem possible to get to them from that small window. Do we need to remove the whole left side to get to them?