99.9±45FXJ-II√0-4000FXJ-IIIX950 The direction machine test rig adopts hydraulic system, the host frequency control of motor speed, speed, any preset computer and digital meter double charged with double show, test oil temperature control electronic display the location of the fuel tank and oil temperature. The main direction of the detection of various machine symmetry of the booster pump, control torque, internal leakage, steering, unilateral heavy. Steering booster pump working pressure and