Steering system is to turn the vehicle and breaking system is to stop or slow the vehicle. This paper describes the various types of steering system, the hydraulic braking system and manual steering system of Light Truck. The Light Truck is four wheel drives and the hydraulic braking and manual steering are used. The braking system will include drum brake, master cylinder, wheel cylinder, brake piping and hydraulic lines. The steering system will have recirculation ball steering. In this system the function of master cylinder, wheel cylinder and drum brake are important to get actuate braking force of the drum on the wheel. In the steering recirculation ball steering, tie rod lengths and linkages are the important to be easily steered. The purpose of this thesis is how to consider and calculate the hydraulic braking system and manual steering system by using some known data and the velocity is 80 km/hr.