CB(M)G series middle-high pressure gear pumps(motors) are hydraulic power(actuator) component in hydraulic system. Cast iron housings of high strength, roller bearing of big diameter(or DU bearing of high loading capacity), bimetal pressure plates fixed and secondary sealing have been adopted. The pumps(motors) have the advantageous features of being high in pressure, wide in speed range, and can be combined into multiple pumps. It is mainly used for loaders, excavators and other construction machinery