Undercarriage Idlers
Replacement Undercarriage Idlers
Idlers guide the track chain or rubber track, help maintain alignment, and work with the tensioning system. Correct replacement depends on the machine make, model, serial range, mounting design, dimensions, and whether the position is front or rear.
Common Idler Applications
- Excavators and mini excavators
- Crawler dozers and loaders
- Compact track loaders and specialty tracked equipment
Review the complete system at the undercarriage parts hub. Also inspect the rollers, chains, sprockets, track shoes, and tensioning components for related wear.
Identify the Correct Idler
Send the machine model and serial number, idler position, mounting dimensions, part numbers, and photos through the Part Finder.
Idler Wear and Track Alignment
Inspect the Whole Tensioning System
Uneven flange wear, leaking seals, bearing play, and damaged recoil or adjuster components can affect tracking. Confirm related wear before installing a replacement idler.
Veteran- and family-owned, Construction Parts PNW serves contractors, municipalities, fleet managers, and equipment owners throughout Washington and the Pacific Northwest. We supply a broad selection of aftermarket wear parts and provide knowledgeable, personalized assistance to help customers identify suitable components for their equipment and applications.
