MTS Model 512-14 Hydraulic Power Unit - Manual (Page 19)

Running the HPU
512.14 Hydraulic Power Unit Operation 19
Do not run the HPU if the filter gage is in the red region.
When the gage needle stays in the red zone, some hydraulic fluid is
bypassing the filter. This unfiltered fluid can wear or damage hydraulic
components.
Turn the HPU off when the filter gage reaches the red zone and change the filter.
Check the Filter Change Gage
5. Check the output pressure gage for the correct output pressure. The pressure
is factory set for 21 MPa (3000 psi).
6. Run the HPU for 20–30 minutes to get the hydraulic fluid up to operating
temperature of 64–68°C (147–155°F).
Once the hydraulic fluid is up to the operating temperature, you can use the
hydraulic system.
7. To turn the HPU off, switch to LOW PRESS, then press the STOP switch.
In the event of an emergency, press the STOP switch or the optional
Emergency Stop switch.
8. If your HPU is water cooled, make sure the heat exchanger’s water valves
are closed.
CAUTION
Green Zone
(normal)
Yellow Zone
(warning to change)
Red Zone
(do not operate)
STOP