Application Note:

The cam (#160) and cam retainer (#170) shown are minor modifications of the standard parts (0020-84807 & 0020-84806) and have been designed to secure together via threads, instead of press fit. These parts are not inter-changeable with the AMAT design and must be used together.

The arc chambers shown with balloons 210 (200mm) and 240 (300mm) are different because of the gaps milled into the top of the chamber for fitting with the mating arc slits. These parts are not interchangeable and must correspond to the proper arc slits.