Operation
46 Series 505G2 SilentFlo™ Hydraulic Power Unit
Local operation
1. Make a general inspection of the HPU. Ensure that all cooling water valves are open. Ensure
the Emergency Stop button is released.
2. If not already displayed, press the Main button to display the Main screen.
3. Verify that the Remote Operation button is gray. If the button is green, press the button to
change it to gray (indicating local mode).
4. Press Run to start the pump. The pump starts in low pressure mode.
5. Check the HPU for leaks and unusual sounds. Stop the HPU immediately if leaks or unusual
sounds are noted. Determine the cause and fix the problem before restarting the HPU.
6. Press High Pressure to turn on high hydraulic pressure.
Note: If the HPU generates an interlock during operation (such as low fluid level or high
temperature), the HPU will stop. Once the cause has been corrected, press the Reset
button before restarting.
7. Run the HPU for about 30 minutes or until the hydraulic fluid is up to operating temperature
[typically 43–49°C (110–120°F)] before using your test system.
8. When in high pressure mode, press the High Pressure button to return to low pressure
mode.
9. To stop the HPU, press the Stop button.
Remote operation
Remote operation can occur at a remote control panel or from your system controller. The controller
must be connected to the HPU.
1. Make a general inspection of the HPU. Ensure that all cooling water valves are open. Ensure
the Emergency Stop button is released.
2. If not already displayed, press the Main button to display the Mainscreen.
3. Verify that the Remote Operation button is green. If the button is not green, press the button
to change it to green (indicating remote mode).
4. Start the HPU in low pressure at your controller.
5. Check the HPU for leaks and unusual sounds. Stop the HPU immediately if leaks or unusual
sounds are noted. Determine the cause and fix the problem before restarting the HPU.
6. Select high pressure at your system controller.
Note: If the HPU generates an interlock during operation (low fluid level or high
temperature), the HPU will be stopped. Once the cause has been corrected, press the
Reset button on the HPU user interface before restarting.
7. Run the HPU for about 30 minutes or until the hydraulic fluid is up to operating temperature
[typically 43–49°C (110–120°F)] before using your test system.
8. Stop the HPU with the controller.
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