High Pressure Hydraulic Gear Pump 9218004. Model Number : 9218004 Hydraulic Function Gear Pump The simple design makes them relatively easy to disassemble, service, and repair, often requiring only the replacement of the gear set and housing. Our differential rear oil pump is easy to install, no need for complicated tools, easy to use, direct replacement for your old or broken one. They are manufactured to OEM specification and are ideal replacement for the original cars. This differential rear oil pump is made of high quality material, which are not easy to damage, wear-resistant and corrosion-resistant, high reliability, stable performance, strong and sturdy, long service life., Manufacturer: KNZVUUY