1. Track Shoes and Shoe Hardware

Check each accessible track shoe for bent or broken grousers, cracks around bolt holes, heavy edge wear and impact damage. Look for loose, missing or damaged bolts and nuts. A clean, bright movement mark around a fastener can be a warning that the joint has shifted.

Do not assume: The widest shoe is not automatically the best choice. Shoe width should match ground conditions, machine configuration and the manufacturer's application guidance.

2. Track Chain, Links, Pins and Bushings

Look for cracked or damaged links, seized joints, displaced seals, unusual side wear and visible separation between shoes and links. Check whether the chain sits consistently on the rollers and engages the sprocket evenly.

The phrase “stretched chain” usually describes increased track pitch caused by internal wear at pins and bushings; the steel links themselves have not simply stretched like an elastic band. Pitch growth must be measured using the correct method and compared with the appropriate wear data.

3. Track Rollers (Bottom Rollers)

Inspect roller shells, treads and flanges for cracks, flat spots, stepped or uneven wear, and signs of contact outside the normal running path. Check around seals and end collars for oil leakage. A roller that does not rotate correctly, makes abnormal noise or develops unusual heat requires closer service inspection.

Do not judge all rollers from one sample. Front, center and rear positions may wear differently, so each roller should be checked and recorded separately during a detailed measurement.

4. Carrier Rollers (Top Rollers)

Check the carrier roller tread and flange, mounting area and seals. Look for leakage, cracks, loose hardware, an abnormal upper-chain path or evidence that the chain is rubbing the track frame. Packed debris around the upper run can hide damage and alter how the chain sits.

5. Front Idlers and Adjuster Area

Inspect idler treads and flanges for impact damage, uneven contact and leakage. Check that the idler travels squarely in its guides and that the left and right sides show a comparable position and wear pattern.

An idler positioned unusually far forward can be associated with pitch wear or an adjustment issue, but its position alone is not a complete diagnosis. Confirm chain measurements, track sag, adjuster condition and the correct configuration before deciding what to replace.

6. Sprockets or Segments

Look for cracked, bent, broken or heavily worn teeth, loose segment bolts and uneven contact marks. Teeth that have become noticeably pointed, hooked or asymmetric may indicate advanced wear or poor engagement, but the correct gauge or wear chart should be used for the final decision.

Inspect sprocket and chain wear together. Installing a new sprocket against a severely worn chain, or the reverse, can prevent the components from sharing load as intended.

7. Track Tension and Alignment

Check track sag using the method and specification for the exact model, track type and working condition. Both overly tight and overly loose tracks can accelerate wear or create operating problems. Mud and other packed material can effectively tighten the track while the machine is working.

Observe whether the chain runs centrally over the rollers and idler. Compare both sides for different sag, side contact or an uneven travel path. Never apply a universal sag value taken from another model.

8. Track Frame, Guards and Final-Drive Area

Inspect the track frame and accessible mounting areas for cracks, damaged welds, bent guards, missing fasteners and packed debris. Look around the final-drive and sprocket area for fresh leakage or impact damage. A leak source must be identified correctly; oil near a roller or final drive does not automatically prove which seal has failed.