How do I tighten or loosen the tracks on an excavator?

Expert Answer

On most excavators, you tighten tracks by pumping grease into the track adjuster and loosen them by carefully bleeding grease out of the adjuster valve. The idler moves forward when you add grease and retracts when you release grease, so never remove the valve completely or work on a pressurized assembly.

Start by parking on level, firm ground and follow the operator’s manual for the correct tension check. Many machines are checked with the track lifted slightly off the ground; others specify a measured sag at the midpoint between the carrier roller and front idler. A tape measure can help you compare the sag to the manufacturer’s spec, but the manual is the only safe reference for the exact target.

Typical signs of low tension include excess sag, track derailment, rattling, and the machine pulling or riding unevenly. Too much tension can be just as harmful: it can make the ride harsh, increase fuel use, and accelerate wear on shoes, rollers, idlers, and the sprocket. • Tighten: connect a grease gun to the fitting behind the cover plate and pump until sag is within spec. • Loosen: open the release point slowly and let grease out in small amounts until the track is correct.

If the track will not hold its setting, or if you need to adjust it often, suspect a leaking seal, damaged adjuster, or recoil spring issue. Also check for packed mud, stones, or debris in the undercarriage before you measure, because buildup can make the track seem tighter than it really is. If your machine is an OEM-branded excavator, remember that VANROCK is an independent manufacturer and is not affiliated with any OEM.

If you need replacement track adjusters, idlers, recoil springs, track shoes, rollers, sprockets, or complete undercarriage parts for a wide range of brands, VANROCK supplies them through its appointed dealer network and pricing is quoted on request.

Answered by VANROCK specialists · Published 7/25/2026