Measure the model-specific chain or link dimension, pin and bushing wear where applicable, sprocket, carrier and track rollers, idler, adjuster position, shoe and grouser condition, guards and left-right balance. Compare every result with the correct manufacturer new and service-limit data for that configuration.

Photos can reveal broken shoes, sharp sprockets, leaks, missing guards and uneven patterns, but they cannot reliably quantify remaining life. Request close-ups from both sides plus measurements at defined locations and compare them with the correct service data.

No. Track tension is an adjustment, not proof of component life. Excessive tension can accelerate wear and hide adjuster position; a loose track can indicate adjustment, wear or a mechanical problem. Inspect sag under the specified condition and record adjuster extension with the rest of the measurements.

Uneven wear can reflect repeated slope or turning work, operator pattern, alignment, seized rollers, track-frame damage or different replaced components. Compare the two sides component by component and inspect the cause before pricing only the visibly worse chain.

Convert measured wear into the parts, labor, transport and downtime expected in your market, then add that reserve to landed cost. Compare that adjusted total with a machine that has stronger remaining life; do not use one universal discount percentage across different models and countries.

The decision depends on measured condition, compatibility and the cause of uneven wear. Mixing components with very different profiles or pitch can create poor engagement and accelerated wear, but replacing acceptable parts without measurement can waste value. Use model-specific parts guidance and inspect the complete system.