elimination method:
1. Check whether the oil pump is oiled, whether the air pressure and oil pressure valve are adjusted to a certain pressure, whether the oil circuit is blocked or cleaned;
2. Whether the spray gun starter switch is high enough (usually adjusted to about 3-4kg/cm2), press the starter spray gun thimble to bounce; if it does not produce oil, clean the inside of the spray gun and the gun cap, pay attention to the spray gun oil seal can not be immersed in toluene Corrosive liquid to prevent deformation damage