Traditional Culture Encyclopedia - Weather inquiry - What hydraulic oil should be used for outdoor high-pressure construction machinery in cold weather?
What hydraulic oil should be used for outdoor high-pressure construction machinery in cold weather?
Selection principle of hydraulic oil:
It is necessary to select the variety according to the outlet pressure and oil temperature of the hydraulic pump.
HL is used for 1, and the pressure is lower than 7.0MPa.
2, the pressure is 7.0 to 14.0MPa, and the oil temperature is lower than 50 degrees Celsius with HL or HM;
3, above 50 degrees Celsius to 80 with hm;
4, the pressure is greater than 14.0MPa, and the oil temperature is 50 to 80 degrees Celsius with hm;
5. The new hydraulic pump uses No.32 and No.46 hydraulic oil, and the old pump uses No.46 and No.68 hydraulic oil;
6, the pressure is greater than 30.0MPa, choose high 1-2.
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