THE DESIGN OF AUTOMATIC HYDRAULIC JACK WITH PNEUMATICS POWERED

ABSTRACT   Fajri, Arif Nur & Firmansyah, Raka Alif. 2017. The Design of  Automatic Hydraulic Jacks  with Pneumatics Powered. Final Report, Department of Mechanical Engineering, Faculty of Engineering, State University of Malang, Advisor : Drs. Yuni Sunarto M.Pd.   Keywords : Hydraulic jacks, Automatic, Pneumatic Development the world of automotive industry is increasingly advanced and faster, along with the development types of automotive industry are also development the supporting components. There are also some set of working components and the components will not last a lifetime, so within a certain period will be replaced with a new component. The problems of removing and installing components on car that breakdown, especially breakdown of car wheel components and breakdown of underside of the car. There are many obstacles when doing the replacement of the wheels on the car, one of them on a lift appliance that is used to raise and lower one area of ​​the car in order to facilitate the release of the wheel or commonly called a jack. To accelerate the process of operating the work of jack and to avoid the work accidents due to mistakes when using the jack, then we make a jack with booster of lever using a hydraulic system that we expect to work be more efficiently. The first steps to design hydraulic jack are: Initial design, engineering design, and manufacturing design. After the design process of the machine was completed then the hydraulic jack machine could be analyzed the weakness before would be checked. The result of build this machine structure were picture of machine and components with the specifications: 5 ton of capacity, 80 centimeters the diameter of lever, 3 bar wind pressure, 2.5 centimeters diameter of hydraulic piston