Title:
ASSY ROLLER,TRUCK (KU-RB51121705)
Description:
The Assy Roller, Truck (RB511-21705) is a genuine OEM track roller assembly used on the undercarriage of Kubota mini and compact excavators. It supports the machine’s track chain and weight, helping load the undercarriage and allowing the tracks to run smoothly over terrain. Without properly functioning track rollers, the undercarriage can wear prematurely, cause uneven track tension, or lead to rough travel performance.
This assembly is built to Kubota OEM specifications, designed to withstand heavy loads, impact, and repeated travel cycles common in construction and excavation work.
Model Fitment:
KX71-3 / KX71-3S
KX91-3 / KX91-3S / KX91-3S2
U25-3 / U25S
U30-2
U35-3 / U35-S / U35-S2
Part Details:
| Part Name – |
Assy Roller, Truck (Track Roller) |
| OEM Part Number – |
RB511-21705 |
| Brand – |
Kubota (Genuine OEM) |
| Component Type – |
Lower/Bottom track roller assembly |
| Primary Function – |
Supports undercarriage weight and guides track movement |
| Typical Fitment – |
Kubota excavators: KX71-3, KX91-3, U25-3, U30-2, U35-3 and variants |
| Installation – |
Bolt-on assembly to undercarriage frame |
| Material – |
Heat-treated steel with sealed bearings |
| Benefits – |
Enhances track stability, reduces vibration, extends undercarriage life |
| Signs of Wear – |
Uneven track wear, noisy or rough travel, visible roller damage |
