Rewinding a plastic-encased zipper flipper close coil
Steps
- Drill out the three rivets that fix the coil frame to the assembly frame, freeing the bobbin.
- Saw the side flanges off the plastic housing and peel the burnt winding away, keeping the square inner bobbin intact (the plunger needs its shape).
- Choose a pinball coil of similar size and about 5 ohms and wind its wire onto the bobbin.
- Wrap the new winding in electrical tape and reassemble with 4-40 screws in place of the rivets.
- Fix the cause: the zipper EOS switch must open, and the fuse must be 1.5 A slow-blow.
Systems
Games
- 4 Queens
- Bazaar
- Capersville
- Cosmos
- Dixieland
- Dogies
- Doozie
- Four Million B.C.
- Hayburners II
- Joker
- Joust
- MiniZag
- Nip-It
- Op-Pop-Pop
- Rocket III
- RockMakers
- Student Prince
- Surfers
- The Wiggler
Related tips
- Which games have zipper flippers
- Sloppy zipper flippers: worn base plate slots and bushings
- Bally zipper flipper solenoids changed at Capersville
- Zipper flipper base plate tension screws
- An EM flipper coil is two windings
- How an EM flipper coil and its EOS switch work
- Rebuild EM flippers before fitting stronger coils
- Bally and 1948-62 Williams (50 V) EM flipper coils
Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part Two, Clay Harrell (pinrepair.com)