How to Check Excavator Track Roller Wear and When to Replace

Short answer: measure the roller tread diameter with a caliper or tape and compare it to the new dimension. At around 70% wear, plan replacement; at 100% the roller shell can crack and damage the track links. Also replace any roller that leaks oil or no longer turns freely.

1. Measure tread diameter

Clean the roller, then measure the outside diameter of the tread (the surface that touches the link rails). Compare it with the new diameter from the manufacturer’s wear chart. The difference divided by the allowable wear gives the wear percentage.

Wear %	Action
0–50%	Normal, keep monitoring every 500 h
50–70%	Order replacements, consider turning links
70–100%	Replace soon
>100%	Replace immediately — risk of shell failure

2. Check for oil leaks

Wet, dirt-caked residue around the roller end caps usually means a failed floating seal. A leaking roller runs dry and seizes within weeks, then flat-spots and wears the links fast.

3. Check flanges and rotation

Look for chipped or worn flanges (track derailing risk) and rollers that do not turn when the machine travels. A seized roller shows a flat, shiny spot.

4. Single roller or full set?

If one roller has failed early (seal leak) but the rest are below 50% wear, replacing just that roller is fine. If most rollers are past 70%, replace the full set together with checking the idler and sprocket.

Need replacement rollers? Browse our track rollers by machine model or send us the OEM part number.