... coring drilling JRK-5 Hydraulic Core Rig1.Main Application and Performance JRK-5 hydraulic core rig applies to ... fields. The hydraulic core rig contains hydraulic pump, hydraulic motor, main valve, windlass, transmission, hydraulic oil cooler, liquid pressure gauge, hydraulic hose and ... capacity m 1540 1200800475Power head capacityMotor CW/CCW hydraulic motor Final drive,gear ratio 2.5 Inner ...