The Hitachi EX40UR-3 is cataloged in more than one track width — 300 / 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 Hitachi EX40UR-3
- 300x52.5Kx86 — 300 mm (12") wide, 52.5 mm pitch, 86 links, K-lug guide lugs
- 300x52.5Nx86 — 300 mm (12") wide, 52.5 mm pitch, 86 links, narrow guide lugs
- 400x72.5Nx74 — 400 mm (16") wide, 72.5 mm pitch, 74 links, narrow guide lugs
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 Hitachi EX40UR-3
Size gets the track on the machine; tread decides how it works and how long it lasts. What we stock for this one:
- MX — mixed and hard surfaces. A durable general-duty excavator tread
Parts we carry for the Hitachi EX40UR-3
Tracks. Call for anything not shown online — we can usually source it.
How these wear
Excavator undercarriages load one side hard on slew and travel, so link cracking usually shows up before the tread wears out. 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 Hitachi EX40UR-3, it is the same belt:
- Case CX33C
- Case CX37C
- Case CX47
- Case CX50
- Case CX50B
- Case CX50BMC
- Case CX50BMR
- Case CX50BZTS
- Case CX55B
- Case CX55B MSR
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.
