Cylinder and piston oil overhaul

 Cylinder and piston oil overhaul, if they are installed the wrong cup sized up due to the correct way should be re-installed cups. Cup cracked the case of damage, replace New cup. Valve failure repair, if there is oil in the dirt so that the ball valve is not sealed,  machine for pellets  valve should be cleaned to remove dirt, so that the ball valve is closed. If the Is a spring loses its elasticity can not withstand high pressure, should be replaced with new springs. If an adjustment screw loose, resulting in less than the predetermined pressure valve on the jump, should be  oil refinery  screw So that when the pressure reaches a predetermined pressure jump valves. Overpressure in the case of regular jobs, resulting in ball valve bumps will be reground valves, replace the ball and Notes Intended to follow the rules and operation.