[Excerpt from Machinery Manual]
7. Rejigger Mounting and Unmounting: Remove the cover over the primary gear and set it aside. Remove the primary gear and replace it with the secondary gear from the alternate drive system. Manufacture and place dual counterbalance weights along the alternate drive system axle and unlink the damping coils at both ends. Remove and set aside the slide arm from the rejigger support. Open the slide arm piston shaft and remove the pistons. Reshape the slide arm pistons to the shorter specifications and reapply lubricant before closing the housing. Install the elongated slide arm into the rejigger support. Adjust the reverse spacer bolt at the junction between the alternate drive system axle and the new elongated slide arm until the interval suits the new application.