There are many factors to consider when working to enhance fuel economy in the field, says Dave Paulk, manager, field technician services, BKT USA Inc.
“The correct amount of wheel/tire ballast is important for a tractor because it helps to transfer the power from the tractor to the ground. With too little ballast, the end user is limited to the size of the implements/wagons he can pull.
“This can create too much tire slippage and can cost your customer fuel and time. Eight percent to 15% slippage is in the recommended range per industry standards.
“Proper air inflation and proper ballast are important to ensure that a tractor performs at an optimum level,” he explains. “Tractors in the field used at lower speeds can run less air pressure to allow for a longer and wider footprint.”
This helps with traction, minimizes soil compaction and saves fuel. Overinflation in the field can cause excessive wheel slippage, according to Paulk.
Tractors on the road that are used at higher speeds need more air pressure in them to carry the weight of the tractor and implements, he notes.
“Load capacity decreases as speed increases. Therefore, more air is needed to protect the integrity of the tire. More air also created a smaller footprint for the road that gives less rolling resistance and better fuel economy.”
Another tactic used is the use of central air inflation systems, according to Paulk.
“A compressor mounted on the tractor and air lines connected to the tires allow for air pressure levels to be dropped in the field and air to be added to the tires before road use. Incorrect air pressure for diverse applications can cause a variety of problems with tires, including premature wear, casing failure and impact breaks.”
Paulk cites one survey that says using the correct air pressure can save end users up to 20% on fuel.
Another survey suggests that eliminating excess slippage by using correct ballast can lead to 10% in fuel savings.
“Very high-flexion (VF) tires carry 40% more weight than a standard tire at the same air pressure. They can also carry the same load as a standard tire at 40% lower air pressure. The VF tire is a good option to consider if no till/minimum till is used on the farm.
“Air pressure dictates the ground bearing pressure on the soil. The more air, the greater the ground bearing pressure that is applied,” says Paulk.
VF tires also provide a larger footprint that reduces slippage, minimizes soil compaction and saves fuel, he continues.
“At times, the weight carrying capacity and speed rating of a VF tire is needed. For heavy tractors, sprayers and other equipment, the VF tire is the best choice to consider. Also if less air pressure is desired for field work, the VF-Rated tire is the better choice.”
