DuraTrack Undercarriage
Excavator Idlers & Front Idler Assemblies
All DuraTrack idlers are produced to OEM specifications and are readily available to fit a wide range of tracked machinery. We offer a variety of cast idler assemblies, each complete with heavy-duty seals, shafts and brackets to deliver durability and performance.
The front idler sits at the front of the track frame. It guides the track links and, pushed forward by grease pressure in the track adjuster, keeps the track at the correct tension.
- Complete cast assemblies: idler, seal group, shaft and brackets
- Listed by machine make and model, with the OEM part number where the catalog carries it
- Manufactured to OEM specification in ISO 9001 approved facilities
- Held in US stock, same-day shipping on a 4:00pm CT cut-off
Shipping & Warranty
Front idler, idler wheel or idler assembly?
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Download BrochureIdlers by Machine Make
Select a make to see every idler we list for it, by model. Each page can be filtered by machine model. The range covers excavators, compact track loaders, forestry machines, cold milling machines, drill rigs and tracked carriers. If your make is not shown, send us the model and serial number: the range reaches wider than this list.
- Hitachi idlers
- Komatsu idlers
- CAT idlers
- Volvo idlers
- Kobelco idlers
- Kubota idlers
- JCB idlers
- Hyundai idlers
- Case idlers
- Bobcat idlers
- John Deere idlers
- Yanmar idlers
- Sumitomo idlers
- New Holland idlers
- Takeuchi idlers
- Doosan / Develon idlers
- Daewoo idlers
- Wacker Neuson idlers
- Link-Belt idlers
- Liebherr idlers
- Tigercat idlers
- SANY idlers
- Airman idlers
- Hanix idlers
Show 13 more machine makes
Or browse the full idlers collection in one list, including the makes below the threshold for their own page.
How to Identify an Idler
The machine identifies the assembly. Send what you can and we confirm the rest against our product reference guide before quoting.
| What to send | Where to find it | Why it matters |
|---|---|---|
| Machine make, model and serial number | The manufacturer's data plate on the machine. | Idlers are listed by machine model, and variants within a model, such as link count or a solid or suspended mount undercarriage, can take a different assembly. |
| OEM part number, if you have it | The parts book, or the markings on the side of the old idler. | Many idlers are also cataloged under the OEM number, so it confirms the match directly. |
| Number of links and track shoe width | Count the links on the chain; measure the shoe width in millimeters. | Confirms the undercarriage the idler runs in. |
| Whether the track adjuster is being changed | Your own inspection. | The adjuster pushes the idler forward, and a worn idler can cause a new adjuster to fail early. |
Scroll the table sideways to see every column.
Select your make above to see every idler we list for it by model, or send the details to our undercarriage team and we will identify it for you.
What Wears an Idler Out
Idler wear shows on the tread and the flanges, where the track links run over it. Three things speed it up.
- Wide track shoes: they increase link, roller and idler tread and flange wear. Use the narrowest shoe that still gives good flotation.
- Work that loads the front of the undercarriage: dozing, push loading and working downhill all put more load on the front, where the idler sits.
- Incorrect track tension: a track that is too tight or too slack wears every mating component, and a failed track adjuster leaves the track in exactly that state.
A worn idler also shortens the life of a new track adjuster, which is why the two are best checked together. Have the idler measured against new dimensions and a wear report written up before anything is quoted, so it is changed alongside the rollers, chain, sprockets and adjuster that need it.
Stock, Quality, Shipping and Supply
Large Stock Availability
Front idler assemblies listed by machine model for more than 60 machine makes, held in US stock.
OEM Specification
Produced to OEM specification in ISO 9001 approved facilities, each assembly complete with heavy-duty seals, shafts and brackets.
Same-Day Shipping
Order by 4:00pm CT and a stocked idler ships the same day.
One Supplier
Idlers, rollers, sprockets, chains and track adjusters from the one DuraTrack range, quoted and supplied together.
Change the Idler, Check the Rest
Three things worth looking at at the same time as the idler.
Track Adjusters
The adjuster pushes the idler forward, and a worn idler can cause a new adjuster to fail early. It is far easier to replace the adjuster while the idler is off, and an adjuster installed with a new idler carries a 12-month warranty.
Track adjusters
Track Rollers
Change the bottom rollers as a set. A single new roller sits proud of the worn ones and increases the wear rate on everything around it.
Rollers
Wear Report First
Have every undercarriage component measured and a wear report written up before you buy, so the idler is changed once, with the parts around it, rather than twice. Our team will tell you what to measure.
Talk to the teamIdler Questions, Answered
What does the idler do on an excavator?
What comes with a DuraTrack idler?
How do I know the idler is worn?
What makes an idler wear faster?
Should I change the track adjuster at the same time?
Which machines do you supply idlers for?
What information do you need to quote an idler?
How fast can you ship an idler in the US?
What warranty comes with a DuraTrack idler?
Get a Quote for an Idler
Send the machine make, model and serial number, the OEM part number or the markings on the old idler if you have them, and tell us whether the track adjuster is being changed at the same time. We confirm the assembly against our product reference guide, price it, and ship from US stock.
