Bush Caliper
1 – Measure the forward wear surface, as per the diagram. Check the measurement with a tape measure.
2 – Measure the reverse wear side. Check the measurement with a tape measure.
Bush Ultrasonic
1 – Measure both sides of the bush with the ultrasonic tool.
2 – Test several points on both sides of the bush until you find the lowest reading.
3 – Use the lowest value to calculate the percentage worn