Diagram of the hydraulic fan system (1) Grid Group (if any) (2) hydraulic fan motor (3) relief valv

Diagram of the hydraulic fan system (1) Grid Group (if any) (2) hydraulic fan motor (3) relief valve (hydraulic fan) (4) Valve (bypass hydraulic oil cooler) (5) Core hydraulic oil cooler (6) Group of High-pressure grid (if any) (7) solenoid valve (hydraulic rockwool fan) (8) Pressure switch (filter bypass) (9) Pressure sensor (if any) (10) Oil Filter (case drain) (11) hole (12) Pressure switch (filter bypass) (13) Hydraulic fan pump (14) Valves control the pump (15) Hydraulic Tank
Pump Compartment (7) solenoid valve (hydraulic fan) (13) Hydraulic Fan Pump hydraulic rockwool fan system consists of the following components. Fan hydraulic pump (13), the solenoid valve (hydraulic fan) (7), hydraulic fan motor (2) and hydraulic oil cooler (5) fan hydraulic pump (13) is a flow piston pump variable. In the hydraulic fan system, hydraulic fan pump (13) provides more speed demand fan by increasing oil flow. The discharge rockwool pressure of the pump hydraulic fan (13) is controlled by a solenoid valve (7) (hydraulic fan). When the solenoid valve (7) is a change of power electronic control module (ECM) engine, the pressure signal to the fan pump (13) will change rockwool accordingly. As signal pressure switches also changes rockwool the flow to maintain pressure on the pump pressure signal. Furthermore, the flow of pressure changes to maintain pressure on the pump pressure signal. The engine rockwool ECM receives information from temperature sensors for engine coolant rockwool and hydraulic tank attachment (attachment, hydraulic fan and engine intake manifold). When the current to the solenoid valve (7) is at the maximum point, the fan pump output is minimal. If the fan speed solenoid fails or there is another problem in the hydraulic circuit of the fan, the fan continues to pump high pressure cutout. Then, the pump generates maximum flow. Adjusting the high pressure cutout control valve in the pump (14) controls the maximum output that provides fan pump (13). The fan motor is a fixed displacement motor that comes equipped with compensating valve (3). Equalizing valve allows hydraulic oil to flow from the outlet of the fan motor through the return compensation valve to the inlet of the fan motor. This flow will prevent cavitation in the engine. When starting the engine for the first time and hydraulic oil is cold, the piston engine oil can not flow easily through the hydraulic oil cooler. The oil pressure will increase in the hydraulic oil cooler. Opens the valve to bypass rockwool hydraulic oil cooler. Valve (4) limits the maximum pressure drop of the oil through the oil cooler to 345 45 kPa (50 7 lb/in2). As temperature increases, hydraulic rockwool oil decreases the pressure drop of the oil through the oil cooler. The spring force on the valve (bypass hydraulic oil cooler) (4) is greater than the force of the oil pressure. Therefore, the check valve (4) closes. Hydraulic oil flow through the oil cooler (5) and enter the hydraulic tank (15). When the engine is started, and if all three sensors temperatures are below key target temperatures, the engine ECM to send the maximum current the solenoid rockwool valve (7). The signal for the oil flow control spool opens into the hydraulic tank (15) through the solenoid valve (7). The oil supply is directed to the actuating piston to cause movement of the decompression pump (13). The angle of the pump swash plate is at a minimum. The pump (13) produces a minimum flow. As one of the temperatures of the three sensors the temperature rises above key objective, the engine ECM sends a proportional reduction of current to the solenoid valve (7). The solenoid valve (7) begins to scroll. This allows rockwool supply of the oil to flow to the flow control spool. The flow control spool begins to move. A proportionate amount of oil back into the hydraulic tank (15). As the pressure behind the actuator piston begins to decrease, the actuator spring plate angle increases