Piston CP022031/069
Piston assembly---The material of the piston is iron,because the Iron is easy to rust, you need to apply lubricating oil evenly when shipping or storing, and wrapping it with in plastic wrap and store. If the Iron is rust, you can sand it off with the 2000 mesh sandpaper.It does not affect using .
Note:It's not necessary to replace the piston when it's rust. Because the rust doesn't mean it is broken.
Tips: Piston is not a consumable part. Usually, the piston is hard to get damaged. The impurity of Hydrualic Oil has the highest possibility of damaging the piston surface. So it is necessary to check the oil quality regularly.