I have not seen this particular problem mentioned, so here goes - I have two lazer Z's and rely on my workers to do at least some of the routine maintenance. I am constantly struggling with plugged grease fittings! I can usually clean most of them up and get them to take grease. Th exceptions seem to be the deck lifting arms. These connect to the chains on one end and the other end rotates on a shaft that runs parralell to the ground across the front and rear of the top of the deck . ( I hope this is a good explanation) I can remove the fittings and replace them with new ones and still no grease. What seems to have happened is the old grease has hardened. I can scrape a little out with a dental tool, but not nearly enough to clear a path for new grese to squeeze out or soften the hard stuff. Any body encountered and solved this problem?