Sp-15 trip spring reference

Thanks to Paul’s recent post regarding trip spring replacement, I was able to discern that my SP-15’s trip/print problem is that both springs are broken. I spoke with Fritz today for advice and ordered new ones. I know there was a photo recently posted by John Cristopher showing a carriage off the press with the trip spring in place. John, if you (or anyone else) has any other close up photos of the spring in place which I could use for additional reference, would you mind posting them or emailing them to me? I will be attempting to thread the springs in without removing the carriage or side plates, and it’s very difficult to see up inside. I don’t have a working press anywhere near for comparison, so any/all reference materials would be helpful. Thank you!

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john christopher
16 years ago

Hi Sylvia

I’ve posted a couple of pictures on flickr: hope this helps…


Eric Holub
16 years ago

It has been a long time since I did this, but you will probably need to insert the spring with both sides of the cylinder in a specific position, forget if it is up or down, whichever would put the least tension on the spring.
One helpful tool, beside a flashlight, is an extension mirror so you can study the area in question from different angles.

john christopher
16 years ago

Hi Sylvia

I’m sure I can supply a closer image of the trip spring in position – watch this space… You might wish to ask Fritz for a copy of the sp-15 manual he supplies – sheet 302 has a very simple clear diagram of the procedure.

Good luck – it looks very fiddley to thread it through – in fact sheet 302 shows an assembly tool j-19953 being used to replace the spring, maybe it’s possible make a simplified assembly tool to do the job – it looks like firstly the spring has to be threaded through into the correct position and then the coiled part thrust onto the dowel. I’ll let you know how I get on.

best wishes


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