Quoted from Tophervette:
I have dipped a toe into the pinball world. I recently bought a Dr Who MPF that came from a flooded warehouse, that was for sale on this site. I have really enjoyed pulling it apart using the Faz guide. Good news is that the motor, gear box, elevator, cam were in good shape. Bad news is that: Metal posts, screws, Tnuts and lamp holders were Rusted. The wood play field was squishy like a sponge on the front. It had 2 mylars stacked. The T nuts were poorly covered in epoxy. The cover is broken and cracked in 3 places. The elevator had both yellow caked grease and black grease. Yuk.
Once apart and every part catalogued, I began cleaning/polishing. I have bought a new wood play field and cover. I have ordered new screws and parts from Marco. Cliffs is making me protectors for the play field. I have taken measurements from the old one as I know I have some drilling and front end removal (2mm) supposedly.
I have been reading up here on testing the Optos. I was able to connect the motor to a 12 volt power supply and was able to verify that it worked with no gear slop. It looks like it had been replaced recently.
Next will be learning how to test the coils. I am guessing they are 12 volt? I have a VOM and will test for continuity and resistance.
Pictures once things are cleaner. Maybe a before and after picture.
Dont assume anything.
Check every step.
Test your work.