Please help!

I am in the process of removing one side plate of my no. 4’s carriage to get to the oil hole block that oils the eccentric bar. Pardon my lack of correct nomenclature for the parts.

I am stuck with this part right here, these don’t seem like taper pins but more like rivets, and not the POP kind. There are two set-screws that I already removed, but this piece won’t give way.

I feel stuck, like I’ve hit a real life impasse.

Do you have any suggestions?

Thanks a bunch. I’m really close to completion. This is the final repair.

As a bonus I’m also posting a photo of the repaired clutch plate, filled with brass solder by my local trusted machinist :)

DSCN0669DSCN0668

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Eric Holub
Editor
11 years ago

Yeah, it is out of time. Timing the cylinder to the bed rack, and timing the trip mechanism are different problems.

Paul Moxon, Moderator
Admin
11 years ago

Yes, you may be able to turn the eccentric rod by hand or clamp a vise grip on it. I trust that the cylinder is properly timed.

Paul Moxon, Moderator
Admin
11 years ago

On my press, when the carriage is rolled forward (in print mode) to the middle of the bed, the taper pin projects from the top and so it’s driven out from the other end.

Eric Holub
Editor
11 years ago

It would be a taper pin, not a rivet. Such a small piece might not have a visually obvious taper (try using drafting dividers to compare ends), and if someone has already tried to beat it out from the wrong end, removal can be difficult.
You need to be using the right tools and know which way the taper goes. Use a pin punch that is as large as the small end of the pin so force is distributed across the whole end of the pin. I prefer a very heavy hammer–actually a hand maul–and give light taps. Using a light hammer and a smaller punch can lead to the use of excessive and deforming force.

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