Steering gear for a track-laying vehicle

A steering arrangement for a tracklaying vehicle having an engine, a drive shaft, and right and left drive wheels, the steering arrangement comprising:

• right and left planetary-gear transmissions each having a sun gear connected to the respective wheel;
• a ring gear coaxially surrounding the respective sun gear and connected directly to the drive shaft, the ring gears being joined together for joint rotation;
• at least one planet gear meshing with the respective sun and ring gears;
• and
• a planet carrier carrying the respective planet gear;
• respective independently operable right and left hydrostatic drive motors connected to the planet carriers of the respective transmissions;
• and
• hydrostatic pump means driven by the engine for independently powering and operating the drive motors for adding the rotation of the other inputs to that of the respective outputs.