Old Hydraulic Bottle Jack Restoration (3.5 tons)

Restoratin an old hydraulic bottle jack liftring capacity 3500 kg (7700 lb) and 155mm(6inchs) betwin max and close hight with a screw extention of 4 inchs i think this tool didnt use for a long time ago ,fortunately i didnt find any geometric serious damage or broken functunal part in side ,it was just rusty . of course that's take much time of work but the result was satisfying if im right.