Hitachi ZX200-5 slow

Hi

I have a trouble Hitachi ZX200-5, all actuator speeds are slow, no fault codes, when I connect Dr.ZX and display Pump 1 Delivery pressure, Pump 1 flow control pressure, pump 2 delivery pressure and pump 2 flow control pressure the delivery pressure on both pumps is 31Mpa, but the flow control pressure on both pumps is only 2.6 Mpa when relieving any function, the reference value on technical manual is 4Mpa.

I appreciate any help. :)

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Hitachi ZX200-5 slow