Operation
50 Series 505G2 SilentFlo™ Hydraulic Power Unit
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.
Perform the procedure for 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).
Caution:
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).
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