4BT 4D102 Main & Connecting Rod Bearing Set 4955855 3967060 for Cummins Tractor Diesel Engine Parts

Product Details

Product Overview

This premium bearing set includes both main crankshaft bearings and connecting rod bearings, specifically engineered for the Cummins 4BT and 4D102 diesel engine platforms. The set comprises two critical part numbers: 4955855 (main bearing) and 3967060 (connecting rod bearing), ensuring a complete replacement solution for your engine’s rotating assembly.

Manufactured to OEM specifications, these bearings are precision-ground for exact fitment and optimal oil clearance. Commonly used in agricultural tractors, forklifts, excavators, and industrial equipment powered by the Cummins 4BT or 4D102 engines, this bearing set provides the durability required for heavy-duty diesel applications. While fitment is verified for the listed models, we recommend cross-referencing your existing part numbers for complete confidence before installation.

Key Features & Benefits

• Complete Bearing Set: Includes both main and rod bearings (part numbers 4955855 and 3967060) for a comprehensive engine rebuild solution
• OEM Specification Tolerance: Manufactured to original equipment size and clearance standards for reliable oil film maintenance and reduced friction
• High Load Capacity: Tri-metal or bi-metal construction (depending on application) designed to withstand the high cylinder pressures of turbocharged diesel operation
• Direct Fit Replacement: Precision-ground bearing shells eliminate the need for line boring or custom fitting in standard applications
• Corrosion Resistance: Protective overlay coating resists acidic oil degradation and extends bearing life in high-hour operation
• Verified Interchange: Cross-referenced against multiple OEM and aftermarket suppliers to ensure compatibility with your specific engine serial number

Technical Specifications

OEM Cross-Reference

This bearing set replaces the following OEM and industry-standard part numbers:

• Main Bearing: 4955855, 4955856, 3931395
• Rod Bearing: 3967060, 3967061, 3931396
• Set Equivalent To: Cummins OEM bearing kits for 4BT3.9 and 4BTA3.9 engines

Note: Always verify your engine’s serial number and existing bearing part numbers to ensure correct undersize/oversize selection. Standard size is listed unless specified otherwise.

Compatibility

This bearing set is commonly used for the following applications:

• Engine Models: Cummins 4BT (3.9L), 4BTA (3.9L Turbo), 4D102
• Vehicle Types: Forklift, Excavator, Truck, Loader, Bulldozer, Bus, Agricultural Tractor
• Common Equipment: Case, New Holland, John Deere tractors; Clark, Hyster, Toyota forklifts; Komatsu, Caterpillar excavators and loaders (when equipped with 4BT/4D102 engines)

Fitment is inferred based on engine model compatibility. Always confirm your specific engine configuration and chassis application.

Global Supply & Distribution

We serve a worldwide network of B2B buyers including parts distributors, equipment dealers, and fleet maintenance operations. Our export capabilities cover all major industrial markets:

• North America: Fast shipping to Los Angeles, Houston, Chicago, Toronto, and Vancouver ports
• Europe: Regular shipments to Rotterdam, Hamburg, Antwerp, and Felixstowe for distribution across the EU
• Asia-Pacific: Direct delivery to Singapore, Tokyo, Shanghai, Sydney, and Dubai hubs
• Middle East & Africa: Service to Jebel Ali, Dammam, Durban, and Lagos with transshipment options
• South America: Established routes to Santos, Callao, and Buenos Aires

We maintain stock in our Guangdong warehouse for rapid dispatch and offer consolidated shipping for bulk orders. All export documentation is provided for customs clearance.

Quality Assurance

Each bearing set undergoes rigorous inspection before shipment:

• Manufacturing Standard: ISO 9001:2015 certified production facility
• Testing: Dimensional checks using CMM (Coordinate Measuring Machine), hardness testing, and surface finish verification
• Outgoing Inspection: 100% visual inspection plus video inspection available upon request
• Machinery Test Report: Provided with each shipment confirming tolerances meet OEM specifications
• Warranty: 6-month warranty against manufacturing defects with straightforward claims process

FAQ

Q: How do I confirm these bearings fit my specific engine?
A: Verify your engine’s serial number and the existing bearing part numbers. For Cummins 4BT/4BTA engines, check the data plate on the valve cover or fuel pump. If you have old bearings, measure the width and thickness. Standard size bearings are for engines with no prior crank grinding. Always consult your engine service manual for correct bearing clearance specifications.

Q: Do I need to replace main bearings and rod bearings at the same time?
A: While not strictly required, it is highly recommended to replace both sets simultaneously during an engine overhaul. Worn main bearings can cause oil pressure loss that affects rod bearings, and vice versa. Replacing both ensures uniform clearance and oil film distribution, extending the life of your rebuilt engine. This kit conveniently includes both sets.

Q: What is the installation procedure for these bearings?
A: Clean all bearing surfaces thoroughly with solvent. Apply clean engine oil to the bearing shells before installation. Torque main bearing caps and connecting rod caps to the manufacturer’s specifications in the correct sequence (usually 90-110 ft-lbs for main caps on 4BT). Always use Plastigage to verify oil clearance (typically 0.002-0.004 inches for main bearings). Do not mix upper and lower bearing shells. Re-torque after initial engine warm-up if specified by the manufacturer.