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,…

What with helping to get our daughter’s Hallowe’en costume finished in time, and trying to clean our store for the studio tour coming up this weekend, I have had little time to work on my Monotype. The current tasks are…

Last but not least of the control valves to be serviced on my Monotype caster is what I refer to as the Mould Signalling control valve. Depending on what options the caster is fitted with, this valve might be used…

After a short side trip to test and trace the individual air lines on my caster I have returned to the task of refurbishing the various pneumatic control valves. The next one to do is the Quadding and Centering control…

On removing the dummy plate on my Unit Adding valve base and testing individual air lines, I have determined that: This valve uses lines I, K, N, 0005, and 0075 (not J, K, N, 0005, and 0075 as my manual…