While refurbishing the front pin block on my Monotype caster I observed the wear on both the jaw pin guide rod and its support caused by having the rod fitting loosely in the support. The end of the rod is…

I added two spacers made from 0.015″ brass shim stock to the collar on the paper clamp shaft, so that the collar would be flush with the step in the shaft and thus provide good support to the inner O-ring…

I have now installed my new Paper Tower Air Supply line to replace the leaky one that was on the caster. I made a top connector from brass, giving it counterbores at either end to accept standard O-rings for sealing…

After disassembling and cleaning the front pin block parts, I noted wear on the Pin Jaw Guide Rod Support, as well as on the guide rod itself. Furthermore, there were several holes in the cover plate that seemed to have…

  Refurbishing the front air pin block on my Monotype caster required, among other things, removing the two sets of tongs that operate the matrix and air pin jaws. Each of these tongs has a pivoted mounting post that is…

After refurbishing the rear air pin block on my Monotype caster, I am now doing the same to the front pin block. Disassembly is a bit different from the rear block, because the front buffer must be removed in pieces:…

As I mentioned in an earlier post, I have found that the air pins on my caster are somewhat sluggish, and in some cases stuck completely. To diagnose this and get the pins on the rear pin block moving freely,…