I am having trouble with my lathe popping out of gear at times. The lever on the top left of the machine will pop out when I have it in the left position. I hve looked in the gear box and do not see any obvious problem, no chipped gear teeth or metal in the oil. There is some wear on the splines of the shaft that the gear slides on. I have changed the oil, using the correct oil. Anybody have any ideas on what to look for?
Thanks in advance,