MTS Series 505G2 SilentFlo Hydraulic Power Unit Model 505G2-30 - Manual (Page 49)

Adjusting the Hydraulic Pressure
Model 505G2.20 - 505G2.30 SilentFlo™ HPU Operation 49
2. Loosen the bolts securing the door of the electrical enclosure and open the
door.
3. Locate the tripped thermal overload or circuit breaker; labeling is provided
next to each component for identification. If necessary, press Reset to clear
the switch. If the thermal overload or circuit breaker switch trips again after
the cause has been remedied, wait until the switch/breaker cools.
Adjusting the Hydraulic Pressure
The output pressure can be adjusted from a low pressure value of 1 MPa (145
psi) to the factory setting of 21 MPa (3000 psi). If you have a special testing
requirement, you can reduce the HPU output pressure. If you do so, you should
also adjust the auto-cooling valve (described later).
Control Locations
To change the output pressure, refer to the appropriate procedure.
Include the procedure Adjusting the Auto-Cooling Level, if the adjusted output
pressure is between 14 MPa (2000 psi) and 21 MPa (3000 psi) and the HPU will
be operated in high pressure mode for an extended period of time (longer than 10
minutes).
Auto-
Coolin
Output
Pressur
Output
Pressure
Control
Return
Line Hose
Control
Manifold