MTS Series 505G2 SilentFlo Hydraulic Power Unit Model 505G2-11 - Manual (Page 45)

Adjusting the Hydraulic Pressure
Model 505G2.07/.11 SilentFlo™ HPU 45
Additional protection is provided by circuit breakers. A tripped thermal overload
or circuit breaker indicates a potential short circuit, too much heat in the
electrical box, or a component failure (mechanical or electrical). Before
operating the HPU, locate and remedy the cause of the tripped thermal overload
or circuit breaker.
Reset the thermal overload switches or circuit breakers as follows:
1. Turn the main disconnect switch counterclockwise to remove power from
the electrical control box.
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.
Control Locations
To change the output pressure, see the appropriate procedure.
Output
Pressure
Control
Control Manifold
(shown rotated)
Return Line
Hose
Output
Pressure
Gage
Auto-Cooling
Valve