Next I removed all of the moving parts from each stepper unit, cleaned all of the old oil and grease from the pivot points of the levers and arms. Notice one of these actuator arms has a nylon piece that slots into the solenoid plunger and is riveted to the metal piece that moves the stepper wheel… well the rivets had worked loose on ALL of these arms on each stepper. I was going to drill the rivets out and put bolts through them but decided to use a ball peen hammer to tighten the rivets up again instead. This seemed to tighten them up nicely. I cleaned everything up with metho and refitted everything, and putting a few drops of  3 in 1 oil on any metal to metal pivot points. Note also this game uses a lot of metal coil sleeves like most of the old Wms Ems did (these Zac games use a lot of Wms parts it seems), so I pulled the out and replaced them with nylon sleeves. ALL of the small coils had these metal sleeves, the larger coils had nylon sleeves already fitted but I put on new ones. I checked the operation of each stepper unit by hand and adjusted where necessary.