Inspection steps of 4140 hard chrome plated bar

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 rod 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.

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