hi all

I’m calling on the fount of collective knowledge here with a technical question. I’m refurbishing an sp-15, and as I was cleaning up the underside of the cylinder carriage I noticed that a rocking lever arm (what is I assume part of the trip mechanism) was sprung with a flat spring on one side – the operator side – but not on the other side. Closer inspection revealed that the spring on the far side had snapped off at some point. My question is – it appears a very complicated operation to replace the spring, is it essential for the press operation?

with thanks and best wishes

john christopher
arcane device press

9 thoughts on “broken spring on an SP-15”

  1. Paul,
    The tool was custom made from the drawing in the manual by Perry Tymeson. Not a Vandercook original, but it works flawlessly.


  2. john christopher

    Thanks again for all your comments – I’ve now chiselled the broken spring off with ease – just need the part number…

  3. john christopher

    Thanks for all your help everyone – i’m in the uk – unfortunately a bit far for the repairman! If someone could post the part number for the spring I’ll order one from Fritz together with the (half-tone) manual. When I looked at it I assumed I would have to take the whole carriage apart to repair it – please say that isn’t necessary…..

  4. I should have said, it is in one version of the SP-15 manual. I have two entirely different versions; one with line drawings and halftones, and one with halftones only.
    The spring repair is shown in the version with halftones only. The same sheet is in the SP-20 manual.

  5. That spring, and instructions for removing it, are in the SP-15 manual. The side of the cylinder without the spring will stay right where it is and will not raise and lower as the opposite side does. It is a necessary repair.
    I’ve already mentioned here the possibility of pulling off the stub of the spring with a hook, rather than chiselling it off as per Vandercook instructions, but with the carriage off the press it should be a rather simple task.

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