broken spring on an SP-15

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

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Fritz Klinke
17 years ago

Don’t worry about the part number–I know what you need. We just need your information.


The Arm
17 years ago

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


Paul Moxon, Moderator
17 years ago

Dan: Is this tool the original J-19553 Assembly Tool? Whether it is or isn’t, could you please post a pic.

The Arm
17 years ago

Where are you located? I know someone with a tool to change this spring.

Daniel Morris
The Arm Letterpress
Brooklyn, NY

Eric Holub
17 years ago

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.

Eric Holub
17 years ago

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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