Pop bumper rebuild kit for Gottlieb AC pop bumper units.
For pop bumper units with replaceable coil stop manufactured from late 1957 and newer.
May be used on earlier games by installing the replaceable stop in original swaged stop bracket or saving the stop for use elsewhere.
Parts include plunger, updated armatures, replaceable coil stop, spring, sleeve, elastic stop nuts for the rod & ring and screws.
Some early applications may have non-removable coil sleeves.
Steel yoke or armature supplied is newer "folded" design which upgrades flat style; application may require flipping armature "up" to clear mounting bracket.
Very late AC pop bumpers have 10-32 thread style coil stop stud which can be replaced with earlier style in this kit by centering carefully
Reference:
- PBK-GTB-AC