Trunnion gear stripped, compactor would not rise.

There are two threaded nuts that hold a shield around the trunnion gear. These must be removed and the stripped gear can be removed. Here was the key for me. The new Trunnion gear cannot be spun into place where it is flush to the scissor gear because the screw is not threaded completely, this is by design.

After the trunnion gear is spun on as far as possible, you must lift the extended compactor head/scissor gear enough to move the trunnion gear flush against the body of the scissor gear. This is the only way to replace the cover over the trunnion gear. replace the threaded nuts, and the job is finished.

Don't forget to lubricate the gear/screw.