How do I adjust track tension on an excavator, and what causes loose tracks?

Question

VANROCK Track Solutions · Accepted Answer

Excavator track tension is usually adjusted by adding or releasing grease in the track adjuster, but the correct setting depends on the machine model, track type, and working conditions. Loose tracks can also be caused by worn idlers, rollers, sprockets, a leaking adjuster, or packed debris, so tension alone may not solve the problem.

A properly tensioned track should have some sag, not be guitar-tight. If it is too tight, it can increase wear on rollers, idlers, sprockets, and final drives; if it is too loose, the track may walk off or skip under load. The safest approach is to follow the machine manufacturer’s service procedure and check both sides evenly. Also inspect for seized rollers, bent components, uneven wear, or track chain stretch, because these often mimic a tension issue.

If your excavator keeps throwing tracks, start with a visual inspection of the undercarriage on level ground: check sag, idler alignment, roller condition, and whether the track is centered in the frame. On mini excavators especially, one side wearing faster than the other often points to an adjustment or component fault rather than a simple tension setting. VANROCK supplies undercarriage parts including track chains, rollers, idlers, sprockets, track shoes, rubber tracks, and track bolts and nuts through our appointed dealer network. We are an independent manufacturer and are not affiliated with OEM brands. Exact fitment and pricing are quoted on request.