If the spool of the overflow valve is stuck in the open position, a large amount of oil will flow from the overflow valve to the tank. This will make the flow into the cylinder too large and the speed insufficient.
If the spill valve core is stuck in the open position, a large amount of fluid flows back to the tank from the overflow valve. This will cause the flow of the incoming cylinder slot to be too large and not fast enough.
If the relief valve spool is stuck in the open position, a large amount of oil will flow back to the tank from the relief valve. This will make the flow into the cylinder too large and not enough speed.<br>