The pump head is one of the most important parts of the hydraulic pump. It takes oil from the hydraulic reservoir and pumps it into the lines creating pressure. The method of pumping the hydraulic fluid is almost the same in all brands of pump heads. The oil is sucked into the inlet where two gears spin in a chamber and create pressure. One gear is shaft driven by a DC motor on the pump and the other gear is a idler gear. Pump heads are sold by different sizes that pump different amount of hydraulic fluid. Jinan Leader Trading Co Ltd is specialized in export trucks spare parts, which made in China. We mainly deal with VOLVO and Mercedes Benz series trucks spare parts, including tractor trucks parts, dump trucks parts, concrete mixer trucks parts and other accessories. We provide more competitive price,most efficient and satisfactory service. If you are interested in our prioduct,please feel free to contact us ,e-mail,telephone,whatever,welcome.