What is an excavator track tension chart, and how do I use it?

Expert Answer

An excavator track tension chart is a model-specific guide that shows the correct track sag or deflection for measuring and adjusting undercarriage tension. Use it with your machine’s operator manual, because the right setting depends on the excavator model, track type, and working conditions.

The usual workflow is: park on level ground, clean the undercarriage, roll the machine forward and back to relieve twist, then measure sag at the top run between the carrier roller and front idler with a straightedge and ruler. If the chart says the track is too loose, add grease to the tensioner; if it is too tight, release grease carefully. Loose tracks can derail or accelerate wear, while over-tight tracks can overload rollers, idlers, sprockets, and final drives.

A good chart also helps you spot patterns: muddy work, rocky ground, and frequent turns often need more frequent checks. If you are unsure, compare both sides of the machine and inspect for uneven wear, seized rollers, or a leaking tensioner.

VANROCK supplies undercarriage parts for excavators through an appointed dealer network and quotes pricing on request. If you are matching parts after a tension issue, check the full undercarriage condition first, not just the grease cylinder.

Answered by VANROCK specialists · Published 10/11/2026