Match Unit RebuildOften overlooked on EMs, but they are a necessary feature if you want the game to play as intended. The units are similar between 70's Gottliebs and Williams. This match unit is from the Canada Dry and is typically over lubricated and simply not working.
The Gottlieb Match unit is easily removed from the machine - two Jones plugs and it is removed.
A simple test proves it is not advancing. So we first start by removing the two screws - notice one screw is larger as it holds a bracket that is inside the unit. It takes a minute or two to remove the wiper arm etc.
So we are left with the plastic parts that are either worn or over lubricated. Remove the two screws holding the bracket and the unit is disassembled. I usually soak in degreaser and then alcohol.
All the dirty parts have been cleaned, and they are ready for reassembly.
The bakerlite boards are cleaned with scotchbrite pads and alcohol. Plastic parts are checked. If the teeth are worm, they can be replaced. A drop of machine oil on the cog and it is ready to be assembled.
Reassemble the wipers and brackets and test - All good !
Took around 25 minutes to complete.
