Thanks for the reminder, I just opened all 4 of mine and lubed the same point using superlube grease. https://www.amazon.com/Super-Lube-92003 ... B0081JE0OO
FWIW, I wish there was a ball bearing alternative, but cost $$$$
I have 4 of these pumps, only had recently installed one for permanent use as of March, but it ran for well over 100 hours straight without failure. I fully admit this is a weak point of the pump design (a plastic molded bushing) as the main crankshaft. I did open mine and lube them before installing, and again, since your failure, I just out of caution lubed the ones installed and printing at this very moment.