T Screw spiral bevel steering gear box applies full-range modularization design with a low noise and high torque characteristics. Appropriate lubricating oil can improve the efficiency of steering machine and prolong the running lives. The initial abrasion period should be two weeks or 100-200 hours. During this process, there will be a few metal abrasive dusts in the speed reducer. Please make sure the interior surface has been fully cleared out, and replace lubricating oil on time. While long time using, please change the oil every half to one year or 1000-2000 hours. Meanwhile, T Screw spiral bevel steering gear box we manufactured is in accord with the quality standards of both China and abroad.