MTS Model 512-14 Hydraulic Power Unit - Manual (Page 25)

Adjusting the Output Pressure
512.14 Hydraulic Power Unit Operation 25
Adjusting the Output Pressure
The HPU comes with its output pressure set at 21 MPa (3000 psi). Special testing
needs may require you to lower this pressure.
Do not set the output pressure higher than 21 MPa (3000 psi).
Setting the output pressure above 21 MPa (3,000 psi) can damage the pump
and its motor.
Set the output pressure no higher than 21 MPa (3000 psi).
Procedure To adjust the output pressure:
1. Set the HPU’s output to HIGH PRESS. Put the HPU into a no-flow
condition (where no fluid is flowing to other hydraulic equipment).
2. Wait for the fluid to reach the operating temperature of 64 and 68ºC (147
and 155ºF).
3. Hold the setscrew with a 5/32–inch hex key. Loosen the locknut with a 9/
16–inch wrench.
Output Pressure
Adjustment
CAUTION