CAT 259B3 Front Idler | OEM 304-1878 | Replacement Part
Contact us with your machine make, model and OEM part number before ordering and our team will confirm compatibility before you buy.
CAT 259B3 Front Idler | OEM 304-1878 | Replacement Part
This front idler assembly is designed for CAT 259B3 compact track loader applications. The front idler is a key component of the CTL undercarriage system, helping to guide the rubber track and maintain correct track tension for smooth machine operation.
This replacement compact track loader front idler is listed against OEM reference 304-1878 . Always compare the OEM reference, machine model and existing idler assembly before ordering.
Product Specification
- Product Type: Front Idler Assembly
- Machine Make: CAT
- Machine Model: 259B3
- OEM Reference: 304-1878
- Weight: 39.3
Fitment Advice
Before ordering, confirm the machine model and OEM reference where applicable. Front idler fitment can vary depending on machine configuration, serial range and undercarriage setup. Using the correct front idler assembly helps maintain proper track tension, supports smooth track movement and reduces unnecessary undercarriage wear.
Dual Flange Front Idler Wheel for Caterpillar® 259B3
This replacement dual flange front idler wheel is manufactured for compatible Caterpillar® 259B3 compact track loader undercarriage systems. Fitted at the front section of the track frame assembly, the idler helps guide the rubber track and support smoother machine operation across demanding site conditions.
Common OEM references associated with this style of Caterpillar® front idler include 304-1878. Compatibility should always be confirmed against machine serial information, flange configuration and existing OEM references before ordering replacement undercarriage parts.
Replacement Dual Flange Front Idler Assembly
This unit is the dual flange front idler configuration used on selected Caterpillar® compact track loader undercarriage systems. Certain machine setups may instead use a triple flange idler arrangement, therefore the existing flange style should always be verified before purchase.
- Replacement dual flange front idler wheel
- Suitable for Caterpillar® 259B3 compact track loaders
- Supports track alignment and guidance
- Direct replacement undercarriage component
- Manufactured for demanding machine applications
Undercarriage Component Information
Front idlers form an important part of compact track loader undercarriage systems by helping maintain track positioning and stable travel during operation across abrasive and uneven working environments.
Compatibility should always be checked using machine model information, serial range, flange design and OEM part references prior to ordering.
Additional Product Details
- OEM reference: 304-1878
- Dual flange front idler configuration
- Replacement compact track loader undercarriage component
- Manufactured for Caterpillar® 259B3 applications
- Commercial USA shipping available on qualifying orders
CAT 259B3 Front Idler | OEM 304-1878 | Replacement Part
This Front Idler is designed for CAT 259B3 compact track loader applications.
Product Specification
- Product Type: Front Idler
- Machine Make: CAT
- Machine Model: 259B3
- OEM Reference: 304-1878
- Weight: 39.3
Related Collections
Also Fits These Models
This front idler is also compatible with the following machine models.
CAT 259B3 Front Idler | OEM 304-1878 | Replacement Part FAQs
Will this front idler fit my machine?
This product is listed for compatible CAT 259B3 applications. Always confirm compatibility before ordering.
What is the OEM reference?
OEM references: 304-1878
What does a front idler do?
A front idler helps guide and tension the rubber track within the undercarriage system of a compact track loader.