Test the system for leaks by manually lifting the plunger. The gauge will show pressure and gradually drop to zero. This takes 3-10 minutes. If pressure drops immediately, check for leaks at the lube pump. Examine all axis linear guide trucks and ballscrews for signs of lubrication. Examine each of the flow meters, lube fittings, and connectors.
Look for drips of oil near the axis flow meters, tees, and connectors.
Check for leaks in the system. Start with the fittings located at the lube pump assembly. Repair the leaks.
Repair all leaks. Make sure the pressure is correct.