TM 10-3930-664-24 6. Check tie rod alignment as follows: a. Ensure that piston rod of steering cylinder is at half stroke. b. Check    parallelism    between    both    wheel hubs at approximately 20 inches from hub center. c. If   not   parallel,   loosen   security   clip   bolts (10) and nuts (11). d. Adjust until parallel.  Position security clips (9) and tighten bolts (10) and nuts (11). FOLLOW-ON MAINTENANCE: Install rear axle assembly (para.  3-41) END OF TASK 3-139