DuraTrack Dozer Undercarriage
Dozer Idlers
Astrak supplies DuraTrack idlers for crawler dozers and track loaders, listed by make and model for CAT, John Deere, Case, Komatsu and Liebherr. Each idler is a complete cast assembly with a heavy-duty seal group, shaft and brackets, manufactured to OEM specification in ISO 9001 approved facilities.
Delivery & Warranty
Get a QuoteIdlers for Every Major Dozer Make
DuraTrack idlers are listed for more than 350 crawler dozer and track loader models: CAT from the D1 to the D10, including the Next Gen machines and the 931 to 983B track loaders; John Deere 450, 550, 650, 700 and 850, including MaxLife undercarriage; Case 455C to 1155E; Komatsu D31 to D155, including the D61 and D65; and Liebherr PR734, PR736 and PR751. Hyundai, Shantui, Daewoo, Hitachi and New Holland machines are covered too. Not listed? Send the make, model and serial number and we will confirm.
Related Dozer Undercarriage Parts
Dozer Undercarriage
Complete undercarriage and kitsSALT chains, track groups, rollers and idlers, supplied individually or as half and full kits.
Dozer undercarriage
Dozer Track Chains
Sealed and lubricated (SALT)Oil filled, with internal bushing life up to 50% longer than a greased and sealed chain.
Dozer track chains
Track Groups
SALT chain and shoes, assembled to orderBuilt in our own workshops and delivered ready to fit.
Track groups
Track Shoes
560mm to 915mm single grouserSingle grouser dozer shoes on heavy-duty baseplates, boron steel, through hardened.
Track shoes
Dozer Top Rollers
Single flange, double flange and shaft typeHeat treated steel casing, sealed and oil filled shaft and bearings, guiding the track over the frame.
Dozer top rollers
Dozer Sprocket Segments
Three or five tooth sectionsForged and through hardened, with tooth profiles induction hardened to over 50RC.
Dozer sprocket segments
Dozer Track Rollers
Single and double flange bottom rollersForged roller shells, heat treated, carrying the machine weight through the track chain to the ground.
Dozer track rollers
Undercarriage Hardware
Grade 12.9 and 10.9, metric and imperialTrack, segment and split master bolts to grade 12.9; sprocket and roller bolts to grade 10.9.
Undercarriage hardwareWhat Goes Into a DuraTrack Dozer Idler
The idler guides the track chain and holds it at the correct tension, under push, rip and turn loads. Material, sealing and fit decide how long that lasts.
| Feature | What it does |
|---|---|
| Complete cast assembly | Supplied as one cast idler assembly, ready to fit. |
| Heavy-duty seal group | Every DuraTrack dozer idler comes with a heavy-duty seal group as standard. |
| Shaft and brackets included | The shaft and brackets come with the idler, so the assembly goes on as one part. |
| Guides the chain, holds the tension | The idler guides the track chain and, extended by grease pressure in the recoil cylinder, keeps the track at the correct tension. |
| Matched by model, position and size | Where a model takes more than one idler, each listing names it by position, wheel diameter or bolt spacing. |
Scroll the table sideways to see every column.
Every idler is matched to the make, model and serial number against our product reference guide. Parts are not interchangeable between models, or often between serial number ranges of the same model.
Idler or roller?
What do I need to identify my idlers?
Does the idler come with the shaft and brackets?
When Do Dozer Idlers Need Replacing?
Idler wear is measured against new dimensions, in the same way as the rollers and chain. Check the idlers whenever the undercarriage is measured, because the parts wear together.
- Wear on the idler tread and flanges where the chain runs
- Material packing in the undercarriage, which stops the chain running true and speeds up wear
- Track shoes wider than the job needs, which increase idler tread and flange wear
- Wear on the chain and rollers, which wear with the idlers
Use the narrowest shoe that still gives adequate flotation, and keep the track correctly tensioned.
On dozer undercarriage a full kit adds the idlers, carrier rollers and bottom rollers to the track groups and sprocket segments, so the whole undercarriage wears from the same starting point.
Why DuraTrack Dozer Idlers Are the Operator's First Choice
Large Stock Availability
DuraTrack dozer idlers held in stock across eight stocking locations, maximising machine uptime.
Quality Approved
Cast, sealed and manufactured to OEM specification in ISO 9001 approved facilities.
Fast Delivery
Warranty Backed
Three years or 3,000 hours on all DuraTrack dozer undercarriage, idlers included, whichever comes first, matching the OEM warranty period.
Dozer Idler Questions, Answered
What is a dozer idler?
Which dozer makes and models do you cover?
Does my machine take more than one idler?
How do I know when idlers are worn?
Should I change the idlers with the rest of the undercarriage?
What warranty comes with dozer idlers?
How quickly can you deliver dozer idlers?
Get a Quote for Dozer Idlers
Send the machine make, model and serial number, with the idler position and the shoe width if you have them. We confirm the idler against our product reference guide and price it.
Speak to the Team
Getting the idler position and size right first time saves a second visit. Technical advice comes at no additional cost.
Call Us
Testimonials
Trusted by machinery owners and dealers worldwide, our customers rely on Astrak for quality parts, expert support and lasting performance.