Before we begin it's important to determine which side the belt is shifting towards.

If the belt is shifting to the right, then turn the right adjustment bolt to turn 1/4 clockwise. If the belt is shifting to the left, then turn the left adjustment bolt to turn 1/4 clockwise.

Place the Allen wrench in the left rear roller bolt.

Turn the left roller bolt adjustment to turn one-fourth clockwise.

Now stop and wait for the belt to begin to center itself.

You must wait for the belt to re-center between each adjustment to ensure that you do not overcorrect the belt.