SECTION 5 STEERING SYSTEM GROUP 1 STRUCTURE AND FUNCTION GROUP 1 STRUCTURE AND FUNCTION 1. OUTLINE 1. OUTLINE The steering system of this machine consists of a variable piston pump supplying a load sensing steering system and an closed center loader system. The components of the steering system are : В Main pump В Steering unit В Steering cylinders The main pump draws hydraulic oil from the hydraulic tank. Outlet flow from the pump flows to the priority valve in main control valve. The priority valve in main control valve preferentially supplies flow, on demand, to the steering unit.
When the machine is steered, the steering unit routes flow to the steering cylinders to articulate the machine. When the machine is not being steered, or if pump flow is greater than steering flow, the priority valve supplies flow to the loader system. That is, output flow from the pump enters into the main control valve for the operation of the attach- ment. 5-1