VALVE GP-TRANSMISSION CONTROL 3050635 - Caterpillar

Illustration 1 g00317907
Steering Control Valve (1) Pressure reducing valve (2) Pressure reducing valve spring (3) Pressure reducing valve adjustment shims (4) Pressure reducing valve stem (5) Outlet to tank (6) Passage to steering cylinder crossover check and relief valve (7) Spacer (8) Inlet passage (9) Steering control valve (10) Externally adjusted relief valveThe pump oil at inlet passage (8) flows through spacer (7) to pressure reducing valve (1) . Oil then flows in pressure reducing valve (1) through pressure reducing valve stem (4) to passage (6) . This oil becomes supply oil for the servo pilot system.When the pressure in passage (6) becomes more than the force of pressure reducing valve spring (2) , pressure reducing valve stem (4) moves to the left against the force of the spring. The pressure reducing valve stem (4) can move far enough in order to block the flow of oil to passage (6) . This stops any increase in the oil pressure.When the pressure of the oil in passage (6) gets too high, pressure reducing valve stem (4) moves farther to the left until the internal passage in pressure reducing valve stem (4) is open to passage (5) . This allows the extra oil to flow to the tank.Pressure reducing valve adjustment shims (3) adjust the pressure setting of the pressure reducing valve (1) . An externally adjusted relief valve (10) allows easier, accurate settings for relief pressure.