[Rimrock]

I guess that Wedico uses the Leimbach hydraulics, which are in general of good quality. A 345 size machine is pushing the limits of the capacity of the Leimbach equipment, but with things finetuned it should operate just fine.
Here are some more ideas;

* Check that the servos will open the valves maximum in both directions (may be adjusted by trim functions)

* Check for contaminant particles in the hydraulic system (filter and so on)

* If the oil level is a bit too low, there can come air in the system, that may slow things down

Is all of the oil the original? If you by any chance have have added some thicker oil into it, that may result in more slow operation.