Hanson Hydraulics - Hydraulic Forum

Hello expert,

As per my maintenance manual, pressure switch 18 control De-energizes regenerative solenoid valve (Y4) and the cylinder slow down begin to push up to maximum pressure or reach the end race descent.

I suspect/could/may be external bottom limit switch /up store switch to active Y5+Y3+Y1 for function up/retract/decompression.

But the external bottom limit switch and top limit switch no show at my system drawing.

If my suspected was wrong please advise me.


I'm looking forward for reply.

Thanks.

It depends on how the macine is wired up, and what the function of the machine is. It could be that the pressure switch shifts the valve from regen to high pressure mode, at the same time starting a timer that will after a given amount of time, shift the decompression valve, pause for a couple of seconds, then retract.