4309121 Image1

4309121
Main Bearing ( Standard ) Set
Cummins®

AVAILABLE

Cummins®

1 is currently available

Ships within 2-4 business days

$49.95 $59.44
Genuine OEM Part

This truck part is made by Cummins®. We guarantee that all of our parts are from the OEM (original equipment manufacturer), ensuring a proper fit and quality manufacturing.

Manufacturer Warranty*
DESCRIPTION
A Main Bearing Standard Set, identified by part number 4309121, is a collection of bearings that fit into the engine block to support the crankshaft. These bearings are designed to withstand the high pressure and heat generated by the engine's rotation, while also maintaining a smooth and consistent surface for the crankshaft to turn on. The standard set refers to bearings that meet the manufacturer's specifications for size and clearance, ensuring proper fitment in your truck's engine. Over time, these bearings can wear down or become damaged from excessive use, leading to decreased performance or even catastrophic engine failure. It is important to regularly inspect and replace your main bearings as needed to keep your truck running smoothly and reliably.

SPECIFICATIONS

Notes
Standard.
Package Dimensions
25.5 x 28.0 x 14.5 in
Weight
1.05 lb

BILL OF MATERIALS

Name Quantity Part Number
Main Bearing 5 4946030
Crankshaft Thrust Bearing 1 4946031
Main Bearing 4 4996250
* This information is provided as is and may be out of date. Please contact us or the manufacturer to verify warranty coverage.
* Variable geometry turbocharger and electronic actuator repairs are not eligible to be claimed as over-the-counter under New or ReCon parts warranty for parts installed after October 1, 2018.
* Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF), Selective Catalyst Reduction (SCR) catalyst, and Electronic Control Module (ECM) repairs are not eligible to be claimed as over-the-counter under New or ReCon parts warranty for parts installed after January 1, 2020.
* These restrictions are only applicable to New parts and ReCon parts coverages for the components listed above sold to a customer in the US or Canada. All other coverages are excluded. All other regions are excluded.

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