Apparatus is provided for use with a tractor or like vehicle. The apparatus is adapted to liquid ballast and inflate a tube within a wheel of the vehicle. The apparatus comprises inflation means which include a pump adapted to pressurize air or liquid to the inflation pressure of the tube. A reservoir is provided which is adapted to be filled with ballast. The apparatus includes a nozzle adapted to fit within the tube. The nozzle is adapted to be positioned to purge up to 100% of the fluid within the tube at ambient pressures. The apparatus also includes piping means connecting the pump to the nozzle, and the pump to the reservoir.