RD208-21904 Upper Carrier Roller

PRODUCT DETAILS

This carrier roller is an aftermarket replacement for the upper track support of Kubota KX161-2 and K040 mini excavators. Designed to support the upper track structure.

I. Core Compatible Models
This carrier roller is guaranteed to fit the following Kubota models precisely:
KX 161-2
K040

II. Functional Role and Installation Advantages
Core Function: As an upper carrier roller, it is installed under the top of the rubber track. It effectively prevents the track from sagging under load during rotation, maintains track tension and operational stability, and reduces abnormal track wear.
Installation Convenience: The roller comes as a complete assembly, including mounting washers and nuts. No additional hardware is required—simply unpack and install directly.

III. Detailed Specifications
Roller body width: 4 5/8 inches
Overall length: 8 inches
Mounting shaft diameter: 1 3/8 inches
Roller diameter: 3 1/4 inches
Bolt width: 2 1/8 inches

IV. Alternate Part Number and Uniqueness of Fit
Corresponding Kubota Part Number: RD208-21904 (original dealer part number)
Uniqueness of Fit: There are no alternative carrier roller models for the Kubota KX161-2. This product is an exclusive compatible part, ensuring precise installation.

V. Related Undercarriage Parts for KX161-2
We also supply the following compatible parts for one-stop undercarriage procurement:
KX161-2 Sprocket
KX161-2 Idler (fits serial numbers 10863 and below)
KX161-2 Upper Carrier Roller (this product: RD208-21904)