HP-65 more on the card reader

[albertofenini]

At this point we had a strong coupling between the motor and the gear, but we must said that
when we have coupled the motor with the black wheel for the pinch the two became noisy, squealing ....
The motor alone even after the modification runs smooth and silent

Question : what can we do for that ?

However, we didn't improve the situation.
We measured the current consumption and it is 200ma when reading, 210ma when writing.
We re-soldered all the joints for the resistor, the capacitors and the controller.
We even swapped the controller with another one from a spare card reader
Nothing, it reads somehow, but it never ever writes ...
Contacts are clean, and are not bent in anyway.

The two HP-65 we are working on have different controllers.
The one mentioned at the beginning of this post has the same controller found on the HP67 the 1826-0322
This unit mounts the usual HP65 controller the 1826-0158 and last night we swapped this with another 1826-0158

So we have two different units, with two different types of controller, different types of pinch roller,
two different magnetic heads acting in the exact same way ... what could be wrong ?

I'm also posting a pictures for some possible capacitors replacement, what do you think ?
The ones mounted are marked as 15K and 22K, what kind of capacitors are these ? Tantalium ?
Can we use the one pictured ?

Thanks for any help !!!