Help with Hydraulic schematic

I have been working on a problem with an old Tschudin HTG 410 grinder and am in need of some help to interpret the hydraulic schematic.

The problem with the machine is that the cross-slide does not move back upon completion of the spark-out time. I have reviewed the timer circuit and found that the spark-out timer should be started by a hydraulic pressure switch when the cross slide reaches its final position. The issue I have is that the pressure switch (E5 shown middle of page to right) closes as soon as the hydraulic pump is started. This leads me to think there is a valve that is stuck open in the hydraulic system. I have the schematic (attached) but am not sure how to interpret. Can anybody tell me what should be causing switch E5 to close?

Thanks,
Jon

View attachment Tschudin Hydraulic.pdf

Is it not a limit switch that closes at the cylinder's extension?

No. Per the electrical schematic, the E5 pressure switch is what initiates the spark out time.