Upper Roller 

Upper Roller – Depth Gauge 

1. Use a Depth Guage placed across the ridge in the middle of the Track Roller.  

2. Extend the pins until the reach the lowest points on the wear surface where link rail runs on the track roller. 

3. Then use a tape measure the measure the length of the pins. 

Upper Roller – Calliper 

1. Use the calliper to just fit the wear area on the Lower roller surface.  

2. Ensure the calliper is reading the true diameter of the roller. The use a ruler to measure the gap in the Calliper