TM 10-3930-669-10 1-15.  STEERING SYSTEM. Steering is hydraulically controlled by the load-sensing power steering unit (1).  The steering unit is powered by the dual cartridge  hydraulic  pump  (2).   The  steering  unit  controls  the  steering  cylinder  (3),  located  on  the  steering  axle  (4),  by turning the steering wheel (5). 1-10