4321887 bearings are used in the Excavator Final drive system of Hitachi ：
4321887 BRG.;ROL. Hitachi parts CHR70, EX100-2, EX100-3, EX100-3C, EX100-5, EX100-5 JPN, EX100M-5, EX120-2, EX120-3, EX120-3C, EX120-5, EX120-5 JPN, EX120-5HG, EX120-5LV JPN, EX120-5X, EX120-5Z, EX120K-2, EX120K-3, EX120SS-5, EX130H
39Q6-42120 bearings are used in the final drive Bearing system of HYUNDAI heavy machinery equipment：
39Q6-42120 HYUNDAI BEARING parts
Apply to R250LC9, R250LC9A, R260LC9S, RB220LC9S, RB260LC9S, RD210-7, RD210-7V, RD220-7, RD220LC9
4236786bearings are used in the Excavator Final drive system of Hitachi ：
4236786 BRG.;ROL. Hitachi parts CX1000, CX1100, CX1800, CX900, EX1100, EX1100-3, EX1200-5, EX1200-5C, EX1200-5D, EX1200-6, EX800H-5, HR1200SG, KH850-3, TL1100-3, ZX1800K-3, ZX800, ZX850-3, ZX850H
Solar pump inverter obtains direct current energy from photovoltaic cells, and converts it into electric energy to drive the water pump. According to the intensity of sunlight, take use of MPPT algorithm, the inverter adjusts the output frequency to make maximum use of solar energy.
