What is going on with the oiler without oiling?

Oiler common fault oiler is not oiled. The oiler is not oiled. It should be disassembled and inspected. The plunger and the pump body are excessively worn to increase the clearance and the pressure oil leaks back. The repair should be cleaned and the oil pump and plunger replaced. The oiler does not absorb oil and does not absorb oil. Seen from the oil hood, there is no oil drop. Indicates that the suction valve is stuck or that the oil cover is installed with unsealed air. Need to clean the oil suction ball valve in the oil pump and replace the oil cap rubber band. Insufficient oil supply to the oiler The oil supply is insufficient due to long-term operation of the uncleaned system, resulting in blockage of the pipeline, or the nut joint is not tightened after inspection, resulting in oil leakage. The pipe should be cleaned to tighten the fitting.