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
Admin
16 years ago

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

Fritz
nagraph@ekiva.net

The Arm
16 years ago

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

Daniel

Paul Moxon, Moderator
16 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
16 years ago

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

Daniel Morris
The Arm Letterpress
Brooklyn, NY

Eric Holub
Editor
16 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
Editor
16 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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