Why is the grease gun not discharging oil and lacking pressure?

1 Answers
VonFinn
07/30/25 10:11am
The grease gun not discharging oil and lacking pressure is due to the wear of the sealing ring on the piston ring in the pneumatic cylinder of the oil machine, causing "cross-flow" from the intake chamber to the exhaust chamber (failing to separate the two chambers). As a result, gas continuously flows out from the other chamber of the cylinder, leading to uninterrupted leakage and exhaust from the silencer of the control valve. More details are as follows. The grease added to the grease gun must be clean: The added grease must be clean and free from any impurities and moisture. Water can corrode the oil pump, so any substances containing water are prohibited from being added to the grease machine. Regularly keep the exterior of the grease machine clean, wipe it frequently, and apply lubricating oil. Environmental precautions: Electric grease machines should not be placed in damp or unclean areas. If the grease machine gets damp, it will cause the machine to overheat during operation. Additionally, excessively high ambient temperatures are also unsuitable, so it is essential to ensure the location is dry and well-ventilated in a timely manner.
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