Operation
Series 505G2 SilentFlo™ Hydraulic Power Unit 49
To set the operating temperature of the hydraulic fluid:
1. Start the HPU and switch to high-pressure mode.
2. Observe the temperature gage as the hydraulic fluid temperature rises. Note the temperature
where the hydraulic fluid stabilizes.
3. Adjust the water-regulating valve. One full turn (360°) of the adjusting screw produces a
change in hydraulic fluid temperature a few degrees.
l Adjust the screw clockwise to decrease the operating temperature.
l Adjust the screw counterclockwise to increase the operating temperature.
4. Note the effect after 15 minutes.
5. Repeat Step 3 and Step 4 until the hydraulic fluid temperature stabilizes between 43°C–49°C
(110°F–120°F).
Resetting 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.
To Next Page
Loading...
Need help?
General