Restoring IBM 2501 card reader - more focus on the stacker side of the mechanism

DISASSEMBLED THE STACKER AREA AGAIN TO GET ACCESS TO ROLLER

The small roller that pinches the card being ejected into the stacker was found to be frozen in my last session. To get to it, I had to remove the stacker hood, the curved arch and cover that directs the card upwards to the stacker, and then remove the rest of the stacker mechanism.

Curved arch and rest of stacker mechanism removed

I pulled the roller part off the mechanism and began working on clearing up the issue. I flooded it with clock oil and manually turned the roller. It was very stiff and crunchy, but with lots of oil and manipulation until it finally began to roll easily as the bits of dust in the ball bearings were flushed out. 

I found two levers on the underside of the joggler structure that were designed to pivot but were stiff due to old lubricants. I don't see what will cause these levers to pivot since they don't connect to any other parts in the mechanism. However, I worked oil into them and manipulated them to make sure they would pivot freely. This took quite a bit of time as well. 

I also tested card movement through the rest of the machine and found that the drag on a card coming in from the hopper was a bit high. The metal surface of the machine that the card will be pushed over had bits of crud on the surface from all the rodent deposits. 

I was able to partially clean it by using a stiff brush along with a cleanser (409) but will have to do more work to get this completely cleaned off. I will finish the cleaning at my next workshop session, along with reassembly of the stacker mechanism parts that I had worked on today.