MTS Series 505G2 SilentFlo Hydraulic Power Unit Model 505G2-180 - Manual (Page 65)

To set the operating temperature of the hydraulic fluid.
1. If not already selected, press the Main button on the user interface panel to select the Main Display.
2. Press Run to start the HPU in low pressure.
3. Press the High Pressure button to select the high-pressure mode.
4. Observe the Oil Temp on the Main Display screen as the hydraulic fluid temperature rises. Note the
temperature where the hydraulic fluid temperature stabilizes.
5. Adjust the water-regulating valve. One full turn (360°) of the adjusting screw produces a change in hydraulic
fluid temperature a few degrees.
• Adjust the screw clockwise to decrease the operating temperature.
• Adjust counterclockwise to increase the operating temperature.
6. Note the effect after 15 minutes.
7. Repeat Steps 5 and 6 until the hydraulic fluid temperature stabilizes between 43°C–49°C (110°F–120°F).
Reset the Thermal Overloads and Circuit
Breakers
The electrical power feed line for each pump motor has a circuit breaker with integrated thermal overload
switch in the main electrical enclosure. If any pump motor draws too much current, its thermal overload switch
trips and disconnects that pump motor from the electrical power feed.
Additional protection is provided by circuit breakers. A tripped thermal overload or circuit breaker indicates a
potential short circuit, too much heat in the electrical box, or a component failure (mechanical or electrical).
Before operating the HPU, locate and remedy the cause of the tripped thermal overload or circuit breaker.
Reset the thermal overload switches or circuit breakers as follows:
1. Turn the main disconnect switch counterclockwise to remove power from the electrical control box.
2. Loosen the bolts securing the door of the electrical enclosure and open the door.
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.
Series 505G2 SilentFlo™ Hydraulic Power Unit Product Information 65
Operation