Hydraulic Pumps

Hydraulic pumps, manual, pneumatic or electric operated, are used for mounting and dismounting rolling bearings in conjunction with hydraulic nuts to apply pressure to them.
 
They are also used for the assembly and disassembly of tight-fitting bearings or other rotary machine elements using the hydraulic method, in which oil is pressed between the mating surfaces to expand and loosen the bond.
 
In addition, hydraulic pumps are used for assembly and maintenance work in industry and workshops, for example to actuate hydraulic cylinders.