MTS Series 505G2 SilentFlo Hydraulic Power Unit Model 505G2-180 - Manual (Page 78)

5. Check and adjust the hydraulic fluid delivery system so that:
• Hydraulic fluid temperature stabilizes within the parameters given in the Specifications table when the
HPU is operating at high pressure.
• Pressure line reading is maintained at 21 MPa (3000 psi) maximum static value.
• Maximum drain line back pressure is limited to 0.1 MPa (15 psi).
If you need to adjust the water-regulating valve, over-temperature switch or pressure control valves,
refer to the procedure on changing the water flow.
About Checking the Low Level/Temperature
Detector
The low level/temperature fixture monitors the temperature and level of hydraulic fluid in the reservoir. Check
the functionality of the low level/temperature detector every 6 months.
Caution:
Running the pump motors with hydraulic fluid below the top of the motors can cause them to fail.
The low level position is factory set. Set the replacement fixture to the same level.
Description Item
Alternate Switch Orientation 1
Note original distance from head assembly to reservoir 2
Raise/Lower the low level assembly 3
78 Series 505G2 SilentFlo™ Hydraulic Power Unit Product Information
Maintenance