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TUBE, ASSY COOLANT 7094034C1 - Caterpillar

7094034C1 TUBE, ASSY COOLANT Caterpillar parts TUBE
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Caterpillar 7094034C1 TUBE, ASSY COOLANT

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Illustration 3 g00944112
Partial Schematic of the implement Control Valve (Steering Section) (2) Line relief valves (3) Signal limiter valves (4) Orifice (5) Proportional solenoid (6) Proportional solenoid (7) Accumulator (pilot oil) (8) Pilot oil screen (9) Check valve (10) Pilot relief valve (11) Stabilizer valve (12) Orifice (13) Pilot relief valve (14) Makeup valve (15) Main relief valve (16) Back pressure valve (17) Inlet section (18) Pressure compensator valve (19) Orifice (20) Spool (21) Resolver (22) Steering section (23) End section (H) Steering (LEFT) (P) Steering (RIGHT) (Q) Inlet from pump ("P1") (T) Pressure port ("PX") (U) Signal port to implement pump ("LSC") (V) Port to accumulator ("PS") (W) Load sensing port ("LSP") (AA) "PL" port (BB) Pressure tap ("PX" port) (CC) Pressure tap ("LS" port)Inlet Section
Illustration 4 g00798764
Section C-C of the Implement Control Valve (8) Pilot oil screen. (10) Pilot relief valve. (11) Stabilizer valve. (13) Pilot valve. (14) Makeup valve. (15) Main relief valve. (16) Back pressure valve.Pilot relief valve (13) reduces the pressure oil from the implement pump at port (Q) to pilot pressure. Orifice (12) limits the flow of oil to the pressure reducing valve. Pilot pressure is set at 3500 kPa (510 psi). The pilot valve is not adjustable.The pilot pressure oil flows through check valve (9) to pilot oil screen (8). If the screen becomes plugged, oil will flow through the bypass valve for the screen. The oil then flows to the proportional solenoids (5) and (6) in the implement control valve. At the same time, a portion of the oil flows through port (V) in order to charge accumulator (7) .Check valve (9) allows the pressure in the pilot circuit to be maintained when the pump pressure suddenly decreases or the engine is stopped. Pump pressure can suddenly decrease when the boom is rapidly lowered. This prevents the function from suddenly stopping.Pilot relief valve (10) prevents the maximum pressure in the pilot circuit from being exceeded. When the maximum pressure is exceeded, the pilot relief valve opens. This allows some pilot oil to flow to the hydraulic oil tank.Note: Stabilizer valve (11) is not used.Makeup valve (14) allows return oil to flow into the pressure oil passages. The makeup valve prevents cavitation in the pump, the cylinders, the motors, and the valves.Main relief valve (15) controls the maximum pressure in the hydraulic system. The pressure setting of the main relief valve is above the cutoff pressure of the implement pump. When the pressure in the implement system exceeds the pressure setting of the main relief valve, the main relief valve opens. Pressure oil flows to the hydraulic oil tank.Note: There is also a main relief valve in the bogie control valve. The pressure setting of the main relief valve in the bogie control valve also limits the maximum pressure in the bogie lift system.Back pressure valve (16) increases the pressure in the return passages of the implement control valve to 500 kPa (73 psi). Pressure in the return passages forces oil to flow

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