hydraulic pump A42XP4MS(LONG) for fiat tractor 

  Hydraulic pump is a hydraulic component for hydraulic transmission to provide pressure liquid, is a kind of pump. Its function is to convert the mechanical energy of power machines (such as motors and internal combustion engines, etc.) into liquid pressure energy. The working principle of single piston pump is the CAM driven by the motor rotation, when the CAM plunger to promote upward movement, the sealing volume formed by the plunger and cylinder is reduced, the oil extruded from the sealing volume, through the one-way valve to the place where it is needed. When the CAM rotates to the curve of the falling part, the spring forces the plunger down, the formation of a certain vacuum degree, the oil in the tank under the action of atmospheric pressure into the sealing volume. CAM plunger constantly rise and fall, sealing volume periodically reduced and increased, the pump is constantly oil absorption and oil discharge.   Yuhuan Donghai Auto&Tractor Parts Factory…