Hitachi – Chain Link 

Measure the link with Depth Gauge or Ultrasonics 

Link – Ultrasonic – UT Probe must be directly over the mid- point of the pin hole. Ensure probe is clear of dirt and debris 

1. Measure the rail over the bush strap or the bush end of the link. 

2. Twist probe to ensure proper signal. 

1. Measure amount of material between the rail and bush. 

2. Make sure under surface of shoe is clean. 

3. Place the depth gauge on the bottom of the rail with pin passing directly through the centre of the bush to meet the undersurface of the shoe. 

4. Measure pin length with a Ruler.