The CAT 239D3 is cataloged in more than one track width — 320 / 400 mm. Pick the width your undercarriage is actually set up for, then choose tread for the ground you work. Free freight to the lower 48 on every track, 24-month warranty.
Which width fits your CAT 239D3
400x86x49 — 400 mm (16") wide, 86 mm pitch, 49 links
320x86x49 — 320 mm (13") wide, 86 mm pitch, 49 links
These are not interchangeable by preference — the width your machine takes is set by the roller frame and sprocket it left the factory with. Wider tread floats better on soft ground and spreads ground pressure; narrower runs cheaper, turns easier and clears tight spots. Measure the existing track across the tread face before you order.
Tread choice for the CAT 239D3
Size gets the track on the machine; tread decides how it works and how long it lasts. What we stock for this one:
C-Block — concrete, asphalt and hard-packed ground. Longest wear life and the least vibration on hard surfaces
Multi-Bar — mud, snow and soft ground. Deep bar lugs bite and shed material instead of packing up
Zig-Zag — general mixed ground. Balanced traction with a smoother ride than a bar tread
If the machine splits its time between surfaces, buy for the ground you are on most — a hard-surface tread on constant mud will spin, and a bar tread on concrete will wear out in half the hours.
CAT 239D3 at a glance
Operating weight — 7,434 lb
Engine — 67 hp
Undercarriage parts for the CAT 239D3
Rollers, idlers and sprockets wear on the same clock as the track. Fitting new rubber over a hooked sprocket or a seized roller is the fastest way to lose the new track — check these while the tracks are off:
CTLs run high ground speed and counter-rotate all day, which is what eats edge lugs and drive lugs first. Replace in pairs where you can: a new track running against a stretched one loads the drive unevenly and you will feel it in the steering.
Same track, other machines
Track size follows undercarriage geometry, not brand, so one of these sizes shows up on machines from several makers. If you run any of these alongside the CAT 239D3, it is the same belt:
Not sure which you are running? Read the size off the inside of the old track, or call (850) 816-7898 and we will pull it off the machine record. The Track Finder works by make and model too.
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Verified-fit rubber tracks and undercarriage parts for the Cat 239D3. Confirm size and tread before ordering.
Frequently Asked Questions
What size rubber tracks fit a Cat 239D3?
The Cat 239D3 can use 320 x 86 x 49 or 400 x 86 x 49 rubber tracks. Match the full size on the track you are replacing before you order. If your machine has more than one track setup, choose the width and guide style that matches the track currently on the machine.
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