When in print, my No. 4 stops advancing just as the cylinder is about to shift down into print. I thought I had the cylinder eccentric mechanisms assembled incorrectly, but I’ve reassembled it several times… The trip roller (BR-134) is at the very top of the trip wedge when the cylinder stops advancing, but there is play in the trip roller, so I don’t think it’s jammed there… I think I need to disassemble the carriage to clean the cylinder bearings, so maybe I’d find the issue, but I thought I’d start here.
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It’s possible that the trip rack is off a tooth in relation to the gear (MR-43). The gear may need to to turned slightly. The rack shouldn’t flush with the top of the plate