I've been working on this machine now for about 3 months off and on. It doesn't appear to have ever been taken apart. The coil sleeves are all aluminum and overall a pretty dirty and grimey machine. However the playfield and plastics appear to be in great shape. The play counter shows 6000 plays, but I really don't put much faith in those being all that accurate.
I have completely disassembled all of the steppers and score reels for the light box. Everything was cleaned, degreased in the ultrasonic, polished, lubricated, and reassembled. Luckily nothing was broken.
Next I moved onto the motor board. Again everything was broken down and cleaned. All of the relays were cleaned as well as all of the switch contacts. Score motor had a complete teardown, cleaning, polishing, and lubricated.
Anything that was removed had to be thoroughly cleaned and polished. Here are some before and after pics.
Moving onto the playfield next.