| A solenoid direct-acting three-position spring-centered directional control valve is used in a hydraulic system to control a linear actuator. When the remote push button is depressed to extend the actuator it fails to move, even though the pump is in operation. Which of the following statements represents the cause? |
| A) A spring at one spool end has broken and jammed, preventing the spool from shifting. |
| B) The 'extend' solenoid coil has developed an open. |
| C) The pump coupling is damaged and pump is unable to turn at its required speed. |
| D) Any one of the above will cause the actuator to not move. |
