I recently completed a restoration project on my, “old-school”, Sears 30A, 6&12V Battery Charger using the 697012 rotary switch I ordered from PLP BATTERY SUPPLY-(It arrived in 4 days).
The four primary windings of the transformer had to be identified and marked, verifying their incremental progression as it pertains to the transformer’s secondary output voltage, from lowest to highest-this is the best way to know how to connect them to to switch in the same progression from terminals 2-4-6-8, in that order.
The original mounting hole was not round but was easily corrected with a 7/16” drill bit. The next challenge was to drill two, additional holes adjacent to the 7/16” hole for the two, switch anti-rotation tabs. This was not that easy to mark while paying close attention to the orientation of the knob pointer. So, I focused on keeping pointer on switch position 3, (at the twelve o’clock position), and then marking the two holes for the tabs. This made all the other switch positions line up perfectly with the various lines marked on the front panel. After a few minor adjustments, the tabs came through the front panel perfectly with the knob’s pointer straight up in position 3 and then I installed the mounting hardware to make it secure.
It took some time and patience to make this all happen-but afterwards, I was so pleased with the results! Anything worth doing is worth doing right-my thanks again to PLP for continuing to make these types of quality, OEM replacement parts available to keep our vintage electrical equipment running perfectly for years!
Rob G