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12_5f2cbd5d-0704-486b-8fb5-633947f63da5 - Northline Parts

2X Bottom Roller RD148-21700 Fit Kubota KX040-4 KX121-3 KX121-3ST Mini Excavator

Alligator_819_x_200_px - Northline Parts

The Aftermarket Parts Specialists

$349.89
Sale price  $349.89 Regular price 

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Ships Nationwide in 2–4 business days.
This Bottom Roller is a high-quality aftermarket replacement part compatible with Kubota KX040-4, KX121-3, and KX121-3ST and matches OEM Part# RD148-21700.

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I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks

Edward H. — Verified customer

Product Overview

This set of two bottom rollers is engineered to provide durable support and smooth track operation for mini excavators. These components are critical for maintaining the undercarriage and ensuring efficient machine movement in tough terrain.

Key Features & Performance

  • High-Grade Construction:Manufactured with hardened materials to resist wear and prolong service life.
  • Precision Alignment:Designed to meet rigorous standards for a precise fit on specified models.
  • Reliable Operation:Internal seals protect bearings from dirt and debris to prevent premature failure.

Fitment & Compatibility

  • Compatible Models:Kubota KX040-4, KX121-3, KX121-3ST
  • Machine Type:Mini Excavator

Technical Specifications

  • Part Number(s):RD148-21700
  • Product Category:Bottom Track Roller
  • Quantity:2 Rollers

Frequently Asked Questions

  • Q:What is included in this product listing? A:This listing provides a set of two bottom rollers for the specified machine models.
  • Q:Do these rollers match original equipment specifications? A:Yes, these components are engineered to match the dimensions and performance of the original parts.

Compatibility may vary by serial number. Verify fitment before purchase.

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Service was professional and easy to work with. They kept me updated on my order and recommended a different part when the one I originally picked wasn’t going to work. Everything showed up as expected and the process was smooth overall.

- Customer, Chris D.

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