1.The hydraulic pump can be mounted with bearings or flanges. The pump and prime mover should use a common foundation support. The flange and foundation should be sufficiently rigid. Special note: the flow is greater than (or equal to) a 160L/min plunger pump should not be installed on the fuel tank.

2.The hydraulic pump and the prime mover output shaft should be connected by elastic coupling. It is strictly forbidden to install the pulley or gear drive hydraulic pump on the hydraulic pump shaft. If the pulley or gear is connected with the pump, a pair of bearings should be added. To install the pulley or gear, the coaxiality error between the bearing and the pump shaft should be no more than Φ0.05mm.

 

3 The suction pipe should be as short, straight, large and thick as possible. The suction pipe generally needs to set the coarse filter with the nominal flow not less than 2 times of the pump flow. (Filtering accuracy is generally 80 to 180 μm). The drain pipe of the hydraulic pump should be directly connected to the fuel tank, and the back pressure of the oil return should be no more than 0.05MPa. The oil suction pipe and oil return pipe of the oil pump must be below the minimum oil level of the fuel tank of 200mm. Special attention should be paid to the installation of the oil filter on the suction pipe of the plunger pump. The diameter of the shut-off valve on the oil suction pipe should be one gear larger than the diameter of the oil suction pipe. The length of the oil suction pipe is L<2500mm, and there are no more than two pipe bends.

4 The inlet and outlet of the hydraulic pump should be installed firmly, and the sealing device should be reliable. Otherwise, the phenomenon of inhaling air or oil leakage will occur, which will affect the performance of the hydraulic pump.

5 hydraulic pump self-priming height does not exceed 500mm (Or the imported vacuum does not exceed 0.03MPa). If the oil is supplied by the charge pump, the oil supply pressure should not exceed 0.5MPa. When the oil supply pressure exceeds 0.5MPa, the pressure seal should be used instead. For the plunger pump, the self-priming method should be adopted as much as possible.

6 Before installing the hydraulic pump, check whether the depth of the mounting hole is greater than the shaft elongation of the pump to prevent the top shaft from being generated, otherwise the pump will be burnt.

1 When the hydraulic pump starts, it should be jogged several times. After the oil flow direction and sound are normal, run at low pressure for 5~10min, then put it into normal operation. Before the plunger pump is started, the pump must be filled with clean working oil through the drain port on the casing.

2 The viscosity of the oil changes with the influence of temperature. The viscosity of the oil increases and the viscosity decreases accordingly. Therefore, the oil temperature should be kept below 60 °C. In order to make the hydraulic pump work stably at different working temperatures, the selected oil should have viscosity. Oil temperature characteristics that are less affected by temperature changes, as well as better chemical stability, foam resistance, etc. It is recommended to use L-HM32 or L-HM46 (GB11118.1-94) anti-wear hydraulic oil.

3 The oil must be clean, not mixed with mechanical impurities and corrosive substances. The hydraulic system without filter device on the suction line must be refueled to the tank through the oil filter truck (filtering accuracy less than 25μm).

4 The maximum pressure and maximum speed of the hydraulic pump refers to the peak allowed during a short period of time. It should be avoided for long-term use, otherwise it will affect the life of the hydraulic pump.

5 The normal working oil temperature of the hydraulic pump is 15 ~ 65 ° C, the maximum temperature on the pump casing is generally 10 ~ 20 ° C higher than the oil temperature at the pump inlet in the tank, when the oil temperature in the tank reaches 65 ° C, the highest temperature on the pump casing Not more than 75 to 85 ° C.