INSULATION 3078894 - Caterpillar

New Recommendations
The tire size difference from side to side on the same axle should not exceed 3%.The difference between the largest tire on the machine and the smallest tire on the opposite axle should not exceed 4%.Recommended Procedure
Ensure that all tires are inflated to the proper working pressure.
Take measurements with a loaded bucket if the machine is working in a load and carry application. For other applications, take measurements with an empty bucket.
Move the machine to a surface that is smooth, hard, and level. Move the machine to an area that is away from operating machines and away from personnel.
Place a long measuring tape on the ground in a straight line. The measuring tape should be extended from the center of any tire.
Slowly move the machine until the tire is on the measuring tape.
Place the bucket in the load and carry position at approximately 0.6 m (2 ft) above the ground.
Place the transmission in the NEUTRAL position and engage the parking brake. Shut off the engine. Place blocks under the tires.Note: Only one or two other people should be in the work area and both people should remain within the view of the machine operator.
Wrap the measuring tape around the tire. Record the tire circumference measurement and the tire location. Use LF for the left front, RF for the right front, LR for the left rear, and RR for the right rear.
Repeat Steps 4 through 8 for every tire.Calculation Procedure
In order to calculate the difference between two tires on the same axle, divide the largest tire circumference by the smallest tire circumference and subtract 1. The result should be 0.03 (3%) or less. If the result is greater than 3%, tire inflation pressures or tire changes are necessary.
Repeat the calculation in Step 1 for the opposite axle tires.
In order to calculate the difference between the largest tire on the machine and the smallest tire on the opposite axle, divide the largest tire circumference by the smallest tire circumference and subtract 1. The result should be 0.04 (4%) or less. If the result is greater than 4%, tire inflation pressures or tire changes are necessary.Note: Discuss any changes in tire inflation pressure with the tire supplier. Check and maintain tire inflation pressures daily.