Kubota KX018/KX019 Mini Excavator Bottom Roller Solution: RG158-21700 (RA231-21700) Assembly

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A worn or ill-fitting bottom roller can undermine track stability and cause premature undercarriage wear, disrupting the operations of Kubota KX018, KX019 and other applicable mini excavators. The RG158-21700 bottom roller—an OEM-caliber aftermarket replacement—ensures precise fit and consistent performance, resolving maintenance troubles efficiently.

Mini Excavator Bottom Roller.jpg

Precise Compatibility & Key Specifications

  • Core Compatible Models: Kubota KX41-3 (Serial Number 40001 & above), KX015-4, KX016-4, KX018-4, KX019-4
  • Key Dimensions: Body width: 5 inches; Diameter: 4.5 inches
  • Alternate Part Number: RA231-21700 (direct replacement for Kubota dealer part)
  • Fit Guarantee: No alternate models available; this exclusive compatible part ensures precise installation and worry-free assembly.
  • Special Requirement: Steel track-compatible version is in stock; please indicate steel track usage when ordering to avoid mismatches.

Functional Role & Installation Details

  • Core Function: As a critical undercarriage component, it supports the machine’s weight, ensures even weight distribution of the undercarriage, maintains track alignment, and reduces abnormal track wear during operation.
  • Installation Quantity: 3 bottom rollers required per side, 6 total for the machine
  • Installation Advantage: Fully assembled and ready for direct mounting, no additional assembly needed; reuses original equipment bolts (no replacement fasteners included), enabling hassle-free and time-saving replacement.

Durability & Quality Assurance

Manufactured to meet Kubota’s undercarriage load-bearing and guiding standards, the RG158-21700 bottom roller delivers reliable load-bearing capacity and wear resistance with high-quality materials. It maintains structural stability and operational safety even in demanding working conditions, ensuring long service life and consistent performance of the track system.

Avoid operational downtime caused by incompatible or low-quality parts. The RG158-21700 bottom roller offers dependable performance at competitive pricing. Contact our team for compatibility confirmation or place your order today to keep your Kubota mini excavator running at peak efficiency.

Media Contact
Company Name: Zoomwin Track Parts Co., Ltd.
Email: Send Email
Country: China
Website: https://www.zoomwintrack.com/