MTS Model 512-04 Hydraulic Power Unit - Manual (Page 27)

Model 512.04 Hydraulic Power Unit Maintenance 27
Changing the Output Pressure
The hydraulic power unit (HPU) comes with its output pressure set at 13.8
MPa (2000 psi). Special testing needs may require you to lower this
pressure.
Do not set the output pressure higher than 13.8 MPa (2000 psi).
Setting the output pressure above 13.8 MPa (2,000 psi) can damage the
pump and its motor.
Set the output pressure no higher than 13.8 MPa (2000 psi).
Output
Pressure
Adjustment
CAUTION