Finishing & Installing the Selector Unit.

I covered the procedure of rebuilding the "pin bank" earlier ( http://jimsrock-ola1452.blogspot.com/2018/02/selector-unit-cleaning-reassembly.html ), but I see that I never covered the project to completion. This Post is a follow-up (or follow-through?) for the sake of closure. This is where things were when I left-off:

Individual sections of the Selector Unit, cleaned and ready for reassembly.

At this time I also cleaned-up the "side plates" of the Selector Unit and went through and "Ohmed-out" all of the individual Selector Coils. I don't know the OEM "Spec" resistance value of these coils, but in going through all of the ones I have (I have a couple spare Selector Units on hand, as well), I found a good average to be about 4.0 Ohms. With nothing else to use a baseline, I replaced anything below 3.4 Ohms, and above 4.6 Ohms.Thankfully I only had to replace 3 of them.

At the same time I cleaned-up and "Ohmed-out" the Clapper Coils:

The model 1452 jukebox uses three Clapper Coils in the Selector Unit, and on this unit I found two of these to be bad (broken wires). Makes me wonder how long this unit was In-Service with only 1/3 (or less!) of the total number of selections available!

Anyway, after everything checked-out I installed the Clapper Coils onto one of the side plates, carefully replaced the pin bank sections, and then reassembled the Selector Unit.

In the top picture above, note how all of the Clapper Coil contacts are perfectly straight and lined-up. I point this out because somehow I managed to bend one of these during handling, which meant that one of the Selections wouldn't play. More on this later.....

Installing the Selector Unit was pretty straightforward:

The white wire (above) is the ground for the Selector Unit, and is connected to the unit with a simple "wire nut" connector. Ugly as sin, but that's what they used back in the day. Thankfully it resides underneath the baseplate, out of sight.

I installed the Mounting Bracket Assembly, which "mounts" the front of the Internal Shaft Assembly, as well as the Popularity Counter and assorted pieces and parts. I don't show the Popularity Meter here simply because I haven't bothered cleaning it yet.

This shoulder bolt keeps the Selector Unit in-place and stops it from spinning with the Record Magazine:

The set screws on the back that connect the Inner Shaft to the Outer Shaft were tightened.

And lastly, there is a ground lug inside the Selector Unit that needs to be found, and connected when the screws that mount the "Rail Segment" are replaced along with the Carriage Assembly.