5. HYDRAULIC DIAGRAM 5.6 AUXILIARY SERVICES CONTROL VALVE 2. When an actuator is operated a b CONTROL VALVE 1 y 4 R 2 5 c D000 5090 When an actuator is operated, the pressure required for its operation is also directed to the channel y (Load Sensing signal channel) and then sent to chamber c of the manifold. This causes the spool (1) to shift upwards and the oil required to operate the load is sent to the control valve. When the load pressure balances the force of the spring (4), poppet (5) is shifted to the left, allowing limitation of the operating pressure. 10-52 P