If the wear of the piston rod is due to the large amount of wear of the cylinder and the piston, or the center line of the cylinder does not coincide with the center line of the base, the method of repairing the piston rod can be used to eliminate the above reasons and solve the leakage of the filler. :

(1) Disassemble and clean the oil on the packing;

(2) Check the inner surface of the ring directly attached to the surface of the piston rod; if there is a rough surface with scratches and scratches on the surface, the piston rod is trimmed;

(3) If the main part of the working part of the piston rod is large (greater than 0.5 mm), the piston rod needs to be turned and ground;

(4) If there are scratches, scratches, etc. on the surface of the piston rod, it can be manually trimmed and ground with a file;

(5) scraping with a reddish-coated method to fit the ring to the working surface of the piston rod;

(6) Pre-assembly of the stuffing box on the non-working part of the piston rod or on the special mandrel. In the pre-assembly, the fitting condition of the stuffing box parts is clarified, and the end faces of the ring and the annular body contacting each other should be carried out. Grinding, grinding of the steel ring was carried out on the flat plate by a coloring method using an abrasive paste.