1. After the 4140 hard chrome plated bar piston is processed, the water pressure experiment should be stopped, and the water pressure is generally L 5 times the maximum working pressure.
2. When the chromium-plated rod piston shows cracks, it should generally be scrapped; the cylindrical surface of the piston is worn due to the friction of the piston ring, which is usually not repaired; when the diameter of the cylinder bore is increased, it needs to be selected according to the increased diameter New bracket; repair only when the chrome-plated rod piston is worn or the chrome-plated rod piston ring groove and cylindrical piston pin hole are worn.
3. When the chrome plated bar piston is scratched or scratched, you can first use a file to file the abrasion and nodules carefully, and then use a whetstone to quietly polish and lubricate.