Turn dials to factory 0-0-0 or current combination. Using a small slotted screwdriver, press in the reset button located on the barrel of the lock containing the dials, press in the reset button and turn the button 90 degrees clockwise (1/4 turn). The button will remain in this position.
Set the dials to the desired combination.
Using the slotted screwdriver, press in the reset button and turn counterclockwise 90 degrees to the original position. The lock has now been reset to the new combination.