Title:
BUSH (KU-RB23721350)
Description:
The Genuine Kubota BUSH (Part No. RB237-21350 / KU-RB23721350) is an OEM idler bushing designed for compatible Kubota mini excavators. Installed within the front idler assembly, this precision-machined bush provides a durable bearing surface between the idler shaft and idler wheel, ensuring smooth rotation while reducing friction and wear within the crawler undercarriage.
Manufactured to Kubota’s original equipment specifications, this genuine replacement bush delivers the correct dimensions, material quality, and fit required for reliable undercarriage performance. It is engineered to withstand continuous shock loading, vibration, dirt ingress, and the demanding operating conditions encountered on construction sites.
As a wear component, the idler bush helps protect the idler shaft and housing from excessive wear. Over time, normal operation can increase internal clearance, leading to idler movement, uneven track wear, poor track alignment, or accelerated undercarriage deterioration. Replacing worn bushes with genuine Kubota components helps restore proper idler operation and maximise the service life of the complete undercarriage assembly.
Model Fitment:
- Kubota KX016-4
- Kubota KX018-4
- Kubota KX019-4
- Kubota KX41-3
- Kubota U15
- Kubota U17
- Kubota U17-5
Compatibility may vary depending on serial number and undercarriage specification. Always verify fitment before ordering.
Application Areas
- Front idler wheel assembly
- Crawler undercarriage
- Track guidance system
- Idler shaft support
- Undercarriage overhaul and maintenance
Part Details:
Part Name: BUSH
Kubota Part Number: RB237-21350
Alternative Reference: KU-RB23721350
Brand: Kubota Genuine Parts
Part Type: Idler Bush / Undercarriage Bushing
Application: Front idler wheel assembly
Approximate Weight: 0.05–0.08 lb (0.02–0.04 kg)
Condition: New Genuine OEM Part
