420-9803 - Front Idler | Caterpillar | 239D3 / 249D3 / 255 / 265 / 239D / etc | Compact Track Loader

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$289.28 $453.99 Save $164.71
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Product introduction

NRP 420-9803 front idler for the documented Caterpillar compact track loader applications listed below. Sold as an individual idler.

Position and function

Guides the track at the front of the undercarriage and works with the track-tensioning system to maintain alignment and correct track slack.

Reference and sales unit

Reference 420-9803. Sold as an individual idler.

Supported applications and configuration

  • Caterpillar 239D3: Use the double-flange front-idler configuration that matches reference 420-9803. Verify the installed part number, mounting and machine configuration.
  • Caterpillar 249D3: Use the double-flange front-idler configuration that matches reference 420-9803. Verify the installed part number, mounting and machine configuration.
  • Caterpillar 255: Only the documented double-flange front-idler configuration matching 420-9803 is supported for Caterpillar 255. Confirm the existing part number, flange profile and mounting; other idler configurations must be checked separately.
  • Caterpillar 265: Only the documented double-flange front-idler configuration matching 420-9803 is supported for Caterpillar 265. Confirm the existing part number, flange profile and mounting; other idler configurations must be checked separately.
  • Caterpillar 239D: Use the double-flange front-idler configuration that matches reference 420-9803. Verify the installed part number, mounting and machine configuration.
  • Caterpillar 249D: Use the double-flange front-idler configuration that matches reference 420-9803. Verify the installed part number, mounting and machine configuration.
About Our Brand

Built with Purpose

At NRP, we don’t just sell parts, we build trust. Every product we offer is backed by years of hands-on experience, careful sourcing, and a commitment to quality that keeps your machines running longer and smoother.

We stand behind everything we sell with a 12-month warranty no gimmicks, no fine print. If it doesn't hold up, we make it right.

Whether you're in the field or in the shop, our team is here to support you with reliable parts and real-world knowledge. It's not just what we do, it's who we are.

Compatible With Leading Equipment Brands

Our premium replacement undercarriage parts and rubber tracks are engineered to fit a wide range of construction equipment. We offer reliable, high-performance solutions compatible with the following major brands:

ASV, Bobcat, Boxer, Caterpillar, Daewoo, Ditch Witch, GEHL, Hanix, Hitachi, IHI, JCB, John Deere, Kobelco, Komatsu, Kubota, Morooka, Mustang, New Holland, Nissan, Schaeff, Sumitomo, Takeuchi, Terex, Vermeer, Volvo, Yanmar

*All brand names are used for compatibility and identification purposes only. We are not affiliated with or endorsed by any of the manufacturers listed.