Tire inflation guidelines
By monitoring ballast levels and tire inflation pressures, operators can maximize traction for the given soil conditions, increase tractor drivetrain life, and optimize efficiency and productivity.  Improving traction can actually reduce input costs by improving fuel efficiency and increasing the overall productivity of the tractor. The time spent managing proper ballasting and tire pressure results in immediate fuel savings, increased flotation and traction, and reduced depth of track and soil compaction. Tractors equipped with an optional radar unit can automatically determine the percentage of wheel slip. This assists in letting operators know if they have the correct tire pressure and ballast. 
Tire inflation pressure should be checked at least weekly while tires are cool, using an accurate dial or stick-type gauge having 10-kPa (0.1-bar) (1-psi) graduations.
NOTE: Use a special air-water gauge and measure with valve stem at the bottom if tires contain liquid ballast.
Correctly inflated radial tires will show some deflection of the sidewall. This is normal and will not harm the tire. Inflation pressures less than 80 kPa (0.8 bar) (12 psi) should be monitored frequently due to increased risk of low-pressure air leaks.
NOTE: Bead slip can be experienced in high-traction conditions and low-inflation pressures. Increasing the inflation pressure will help but can reduce traction.
Maximum pressure for a given tire is specified on the tire sidewall.  To determine appropriate tire inflation, the front and rear axle weights must be known.  Weigh the correctly ballasted tractor using the following procedure:
  • Front axle weight with implement lowered
  • Rear axle weight with implement raised
Managing tire inflation pressures
Tractors operating with a loader should increase front tire pressures 30 kPa (0.3 bar) (4 psi) above the values listed to compensate for weight transfer.
Tractors with heavy, hitch-mounted implements require increased rear tire inflation pressures to carry the increased weight during transport. Make sure the rear axle weight is always measured with the hitch-mounted implement in the raised position. The front axle weight should be determined when the implement is in the lowered position.
Last Updated : 25-Jul-2013