Restoring 2501 reader - linear bearing repair, still one roller bearing to resolve

MANAGED TO FREE UP THE BALL BEARINGS IN THE STACKER SLIDE

Previously I had despaired of getting the slide in the card stacker to move freely enough to be usable, due to corrosion in several places, particularly on the rod and linear bearing upon which the slide travels. I was able to inject the clock oil into the ball bearings inside the shaft of the linear bearing. This returned them to smooth operation. 

The rod is still a bit rough so the smoothness is not perfect but seems sufficient to have me stay with the IBM parts. I got everything reassembled and did some testing. It is borderline, but I may be able to relieve more friction on the rod, the flat spots on top of the slider and the underneath of the side rails that the flat spots slide upon. 

CHECKING CARD PATH AGAIN FOUND ONE ROLLER NOT TURNING

While hand cranking the mechanism, I tripped the solenoid to watch a card be fed from the input hopper into the pre-read station. It didn't reach the full end point but I believe the reader depends on the momentum of the card to continue its motion once it exits from the pressure rollers. 

I then tripped the other solenoid and cranked the card through the read station and up into the stacker. It paused partway through the stacker where I realized that I had a problem with one roller. A rubber wheel turns on one side of the card while a spring loaded metal roller pressed on the backside of the card. The wheel turns but the roller did not. 

roller circled in red

I began treating it with clock oil, but t may require removal from the machine to really get it working smoothly. We will see how it turns on my next visit to the workshop, otherwise I will partially disassemble the stacker once again to get that roller out. 

STACKER JOGGLER FUNCTION VERIFIED

The jogglers grab the bottom edge of a card that has fallen down after ejecting from the reader, moving it over against any other cards that are already in the stacker (or against a metal holder if this is the first card going into the stacker). The joggler linear motion is provided by a pivot that rides on a cam, but the pivot was almost frozen in place.

I forced the pivot off its shaft and removed some crud. There was a bit of corrosion near one end, but fter greasing the shaft and reassembling the mechanism, I observed very smooth and easy movement.