82 HyPrecision 50S/60S/75S Operator Manual 808690
5 – Preventive maintenance
Preventive maintenance
Adjust the hydraulic fluid temperature
The optimum operating temperature for hydraulic fluid in this system is 40.6°C (105°F) to 46.1°C (115°F). If the
temperature is outside of this range, adjust the hydraulic fluid temperature.
Required parts, tools, and materials
Flat-blade screwdriver (for pumps with a water-modulating valve)
Infrared thermometer
Other types of external-reading thermometers, such as the style that adheres to the outside of machinery, can
be used.
Do this task when the pump is running.
Water-cooled system with a heat exchanger
1. Open the valve on the cooling water line to increase the cooling water flow to the chiller. Close the valve on
the cooling water line to decrease the cooling water flow.
2. Wait approximately 5 minutes to let the hydraulic fluid temperature stabilize.
3. Check the temperature.
4. Repeat this procedure until the temperature is in range.
Water-cooled system with a water-modulating valve
1. Turn the screw on the top of the water-modulating valve 1/2 turn to the left (anticlockwise) to increase the
temperature. Turn the screw on the top of the valve 1/2 turn to the right (clockwise) to decrease the
temperature.
2. Wait approximately 5 minutes to let the hydraulic fluid temperature stabilize.
3. Check the temperature.
4. Repeat this procedure until the temperature is in range.
Air-cooled system
The temperature of an air-cooled system is not adjustable. If the hydraulic fluid temperature is out of range,
refer to the
High temperature section on page 166
Calibrate or check your thermometer for accuracy before use.
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