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2) Place the bar on a firm surface. One side of the bar has a red dot (called the red side). Place the
bar with the red side on the left.
3) Hang the TR-30 Easy Check Angle Gauge on the red side disk in the normal way
and zero the caster bubble using the caster zero knob.
4) Reverse the bar on the ground so that the foot nearest the red side is now the black side. Place
the gauge on the black side which is now on the left. Read the caster bubble and note the reading.
5) Loosen the nut to adjust the height. Adjust the screw until the caster bubble is one half of the
way back to zero. Lock the nut until tight. Do not over tighten.
If the bar is properly calibrated, the caster reading will be the same with the bar returned to the
original position (red side on the left).
Once the bar is calibrated, it should not require recalibration. Even so, it is wise to periodically
verify the calibration.
