Williams Pinball Flipper Assemblies 1984-1998

I used some incorrect parts on my Elvira and the Party Monsters (EATPM) pinball flippers. While I was tracking down the proper parts, I ended up doing an exhaustive analysis and comparison of flipper assemblies, sub-assemblies, and individual parts used by Williams between 1984 and 1998.

This video covers all of the core flipper assemblies used in Williams System 9, System 11, and WPC pinball machines, specifically discussing flipper assembly part numbers C-9952 / C-9953, C-11626, C-13174, A-15318, A-15205, and A-15849.

00:00 Problem with my EATPM
03:00 Incorrect crank-link assembly
04:19 Types of Williams flippers
06:47 Core assemblies
07:33 C-9952 / C-9953 (06/1984 - 01/1987)
09:32 C-11626 (03/1987 - 08/1991)
10:44 C-13174 (06/1990 - 08/1991)
11:48 A-15318 (08/1991)
13:18 A-15205 (02/1992 - 04/1993)
14:28 A-15849 (08/1993 - 10/1998)
15:22 Assembly summary and parts breakdown
17:17 Crank-link subassemblies
18:51 Engineering revisions of C-11626
21:24 Updating older assemblies
23:04 Fixing my EATPM

Updates and errata:
Assembly C-11626 used two different coil stops. The assembly was revised in February 1988 to increase the height of the coil stop, as shown in the C-11626 revision chart at 19:52. Games made before February 1988 used coil stop A-10821; those games were F-14 Tomcat, Fire!, Big Guns, Fire! (Champagne Edition), and Space Station. Later games with C-11626 used coil stop A-12111, which was 1 mm taller. Either coil stop will work in C-11626, but flipper travel will be less than the original design if you use A-12111 in one of those early games.
Terminator 2 uses assembly C-13174, but is listed at 7:00 as using C-11626.
Gold Mine is listed as using “System 11” Style assembly C-11626 at 4:38 and 7:00, but Gold Mine is a shuffle bowler, not a pinball.

Please visit the following invaluable websites:
Flipper assembly photographs from: https://www.thepinballwizard.net
Parts catalog diagrams from: https://www.pinwiki.com
Invaluable information, including operator manuals and parts lists, from: https://ipdb.org
Parts images from: https://www.marcospecialties.com
Inspired by a great series of articles posted at: https://www.pinballnews.com/learn/fli...