1. It is recommended to use branded, high-pressure, high-definition, anti-wear hydraulic oil L-HM46 or L-HM68 as the working fluid for each series of oil pumps.

2. The normal working oil temperature is 15-65 ℃, the ideal working oil temperature is 50 ± 4 ℃, and the kinematic viscosity is 27-43mm ²/s. When the oil works at normal working temperature, it should be ensured that its kinematic viscosity is not lower than 27mm ²/s at 65 ℃ and not higher than 43mm ²/s at 15 ℃.

3. The self-priming vacuum caused by the high viscosity of the oil during cold start should not exceed 0.016MPa, and the cleanliness of the oil should be controlled within NAS10 level. Poor cleanliness will significantly affect the service life of the oil pump!