Check RAM and plunger every 3 months for any signs of rust or corrosion
Clean as needed and wipe with a clean lil cloth
When not useing,hoist alwys leave RAM in dowm most positon
When adding or replacing oil.always use A good grane of hydraulic jack oil,avoid mixingtypes of oil
Do not use brake fluid,alcohol,glycerine,detergent,motor oil a dirty oil
When adding oil,must be very careful not to permit dirt or other foreign matter to get into system
