BELT GP 5069453 - Caterpillar

Illustration 1 g01281890
(1) Load signal
(2) Inlet manifold
(3) Pump pressure oil
(4) Oil drain
(5) Tank line
(6) Inlet check valve
(7) Check valve
(8) Steering metering pump
(9) Pump pressure oil
(10) Hydraulic pump
(11) Hydraulic tank
(12) Front steering cylinder The steering system is a closed center system. The steering system is part of the load sensing, pressure compensated hydraulic system. The components that follow are components for the two-wheel steering system. Inlet manifold (2), steering metering pump (8), hydraulic pump (10), Hydraulic tank (11) and front steering cylinder (12). Hydraulic pump (10) and tank (11) are common to both the steering and implement systems.The following components are involved in the operation of the steering system and the implement system.
Load signal oil (1) that flows from the backhoe control valve
Pump pressure oil (3) that flows from the backhoe control valve
Oil drain (4) to the tank
Tank line (5)
Pump pressure oil (9) that flows to the backhoe control valveHydraulic tank (11) provides oil for both the steering and implement hydraulic systems. If you operate the machine, oil flows from the hydraulic tank to the hydraulic pump. The oil then flows into the backhoe control valve. The oil flows from the backhoe control valve to Inlet manifold (2). The priority valve is located in the inlet manifold. The priority valve sends pump oil to the steering system and the priority valve directs excess oil to the loader control valve.The bank valves for the loader are located under the cab floor on the right frame rail.The steering metering pump (8) is located behind a panel in the operator station. The metering pump is connected to the steering column. Oil flows from the inlet manifold (2) into the metering pump through an inlet check valve (6). The steering metering pump (8) has a signal relief valve. The signal relief valve limits the pressure to the steering metering pump (8).
Illustration 2 g01281884When the steering wheel is not turning, oil constantly flows from the inlet manifold (2) to the metering pump through a dynamic orifice for load sense in the inlet manifold (2). This oil flow maintains a minimum pressure level in the metering pump. This improves the response of the steering system. When the wheel is turned, the oil flows through the steering metering pump to the steering cylinder. In the control section of the metering pump, there is another check valve. The check valve (7) is between the pump supply and the ports for the return oil.The two check valves allow steering capability when the engine is not running. The check valve (7) allows oil to flow from the hydraulic tank. This oil flows to the inlet for the metering pump. The oil flows in order to recirculate between the metering pump and the steering cylinder.Front steering cylinder (12) is located on the front axle in front of the rear trunnion mount. The cylinder has one piston and the cylinder is double ended with two rod ends. When you turn the steering wheel, the metering pump directs oil to one side of the