INSTALLING WILLIAMS WPC FLIPPERS IN A CLASSIC BALLY or CLASSIC STERN
Why the hell would anyone do something like that???
$22 future rebuilds, longer lasting EOS Switches because of Parallel Wound Coils, longer lasting Coil Stops, longer lasting links, no compression springs, indefinite flipper shaft positioning, or the only thing you had with you on a service call was WPC flipper mechs.
I went out on a service call to fix a Xenon that has been in constant service for 35 years. The clubhouse owner said the flippers were sticking in the up position, even if the power was shut off. This tells you that the problem is mechanical - flippers need a rebuild.
I had serviced this machine 100000 times, so I knew that the crappy Linear flipper mechs had been changed to the much superior Standard flipper mechs (how to do this yourself: https://pinside.com/pinball/forum/topic/vids-guide-to-upgradingrebuilding-flippers/page/11#post-1855100 ).
I brought a standard Bally rebuild kit ( http://www.pbresource.com/rebuildkit.html#KT-BFLIP03) with me to do the repair.
When I lifted the playfield I saw, to my horror, that someone had switched the game back to Linear flipper mechs! As a bonus, they drove oversized wood screws through the coil stop baseplate holes, completely stripping out the baseplate. Normally if the base plate is stripped on a Classic Bally, you can switch the left and right plates to use the fresh holes (Bally are universal plates), but this trick had apparently been done already. If I was back in the shop, I could drill out the holes, tap them for the next size up bolt, and get things working again, but I was 40 minutes from my shop. The only solution I had with me was WPC flipper mechs....
In this job I used:
On left, one right, one left, WPC flipper mechs: http://www.pinballlife.com/index.php?p=product&id=172
F-11630 Coils: http://www.pinballlife.com/index.php?p=product&id=8
A-12111 Coil Stops: http://www.pinballlife.com/index.php?p=product&id=273
High Voltage EOS Switches: http://www.pinballlife.com/index.php?p=product&id=262
Titan Competition Flipper Rubbers: https://www.titanpinball.com/index.php?route=product/product&path=33&product_id=52
You need to order right and left flipper mechs because Williams are NOT reversible.
You want the F-11630 coils because they are perfect replacements for the old Bally coils. Yes, if you "do the math" the F-11630s are stronger coils than the Bally, but the Bally is only running at 43V, not the Williams 50V. The lower voltage nicely balances out the stronger coil.
You want the A-12111 coils stops so the flippers still have the same range of motion as the old mechs.
You want the High Voltage EOS Switches so they don't get destroyed by the spark arc. The new Parallel coils will cause less damage to the EOS Switches, but will still be too damaging to low voltage switches.