Removing the lockdown bar and playfield glass
Steps
- Open the coin door and pull or swing down the latch lever at the top of the opening, then lift off the lockdown bar. On games from about 1960 and earlier the bar is instead held by two threaded posts and nuts.
- If the latch is seized, use penetrating oil and gentle persuasion; hammering bends the metal.
- Slide the glass out toward you; if grime has locked it in its channels, wiggle it side to side to break it free.
- Scrape the dirt off the glass edges and channels, and note the glass size in case it ever needs replacing.
- Store the glass where it cannot be knocked over or walked into.
Keep penetrating oil (WD-40) away from plastic parts and electronics; it attacks plastic.
Systems
- Williams System 3
- Williams System 4
- Williams System 6 / 6A
- Williams System 7
- Williams System 9
- Williams System 11
- Williams System 11A
- Williams System 11B
- Williams System 11C
- WPC Alpha-Numeric
- WPC Dot Matrix
- WPC Fliptronics
- WPC DCS
- WPC-Security (WPC-S)
- WPC-95
- Bally MPU AS-2518-17
- Bally MPU AS-2518-35
- Stern MPU-100
- Stern MPU-200
- Bally 6803
- Gottlieb System 1
- Gottlieb System 80
- Gottlieb System 80A
- Gottlieb System 80B
- Gottlieb System 3
- Data East CPU Version 1/2
- Data East CPU Version 3
- Data East/Sega CPU Version 3b
- Capcom
- Electro-mechanical
Source: Pinball Machine Care & Maintenance, Bernard B. Kamoroff (Bell Springs Pinball Alley)