MTS Series 505 SilentFlo Hydraulic Power Unit Model 505-30 - Manual (Page 46)

Model 505.20 - 505.30 SilentFlo™ HPU 46
Adjusting the Hydraulic Pressure
Operation
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).
The pump and motor are designed to operate below a specified pressure.
Setting the hydraulic pressure above 21 MPa (3000 psi) can damage the
pump and its motor.
Do not adjust the output pressure higher than 21 MPa (3000 psi).
Adjusting the HPU
output pressure
1. Turn on high hydraulic pressure. Ensure that there are no flow demands by
the system.
2. Loosen the nut securing the output pressure control.
Auto-
Coolin
Output
Pressur
Output
Pressure
Control
Return
Line Hose
Control
Manifold
CAUTION