Product Details

Product Overview

This is a premium quality main bearing and connecting rod bearing set, specifically manufactured for the Cummins 6BT diesel engine. Featuring a 0.50mm (0.020″) oversize specification (part number 3939861), this bearing set is designed for engine rebuilds requiring a reground crankshaft. Sourced from high-quality materials to ensure a precise fit and long service life, this kit is ideal for heavy-duty applications including trucks, industrial equipment, and marine vessels. We ship globally to major industrial centers in North America, Europe, Southeast Asia, the Middle East, and South America.

Key Features & Benefits

• Precision Oversize Fit: Manufactured to a precise 0.50mm oversize standard, ensuring correct oil clearance and optimal crankshaft support after a regrind.
• Superior Material Composition: Constructed from a tri-metal or bi-metal high-strength steel backing with a lead-copper-tin overlay for excellent fatigue resistance and conformability.
• Enhanced Durability: Designed to withstand the high cylinder pressures and thermal loads of the turbocharged 6BT engine, reducing the risk of bearing spin or seizure.
• Cost-Effective Rebuild Solution: Provides a reliable and affordable alternative to OEM components without compromising on performance or longevity.
• Complete Set: Includes all necessary upper and lower shells for both main and connecting rod positions, simplifying the ordering process.

Technical Specifications

OEM Cross-Reference

This bearing set is a direct replacement for the following original equipment manufacturer (OEM) numbers:

• Main Bearing: 3939861
• Rod Bearing: 3939861 (Rod bearings often share the same part number prefix in this kit)
• Alternative Numbers: 3914810, 3914813, 3914814 (May be superseded or alternative listings for standard size; verify 0.50mm spec)

Note: Always cross-reference your existing bearing part number to ensure correct size and application.

Compatibility

This bearing set is designed for the following applications:

• Engine: Cummins 6BT (5.9L) 6-cylinder diesel engine.
• Vehicle Applications: Dodge Ram 2500/3500 (1989-2002), Ford Econoline (with Cummins conversion), various agricultural tractors (Case IH, New Holland), industrial compressors, and generator sets.
• Specification: Specifically for engines where the crankshaft has been reground to 0.50mm undersize. Not for standard or 0.25mm applications.

Global Supply & Distribution

We are a leading supplier of heavy-duty engine components with a robust global logistics network. Our services include:

• Worldwide Shipping: Reliable delivery via DHL, FedEx, UPS, and sea freight to major ports worldwide.
• Major Markets: Serving North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands), Asia-Pacific (Australia, Singapore, UAE), and Middle East (Saudi Arabia, Qatar).
• Fast Delivery: Stock items are dispatched within 24 hours of order confirmation to major industrial hubs and ports.
• Trade Compliance: Experienced in international export documentation and customs clearance.

Quality Assurance

• Manufacturing Standard: Produced under strict ISO 9001 quality management systems.
• Material Certification: Components are traceable and meet or exceed OEM specifications for hardness and dimensional accuracy.
• Testing: Each batch undergoes rigorous dimensional inspection and material composition analysis to ensure perfect fitment and durability.
• Warranty: Backed by a standard 12-month warranty against manufacturing defects.

FAQ

Q: What does “0.50mm oversize” mean?

A: This bearing is designed for an engine where the crankshaft journal has been ground down by 0.50mm (0.020 inches) to repair a damaged or worn surface. The bearing shell is thicker to compensate for this material removal, restoring the correct oil clearance and bearing crush.

Q: Is this a complete set for a 6BT engine?

A: Yes, this set includes all 7 main bearing shells and all 6 connecting rod bearing shells required for a complete 6BT engine rebuild. It does not include thrust washers, which are typically sold separately.

Q: How should I store these bearings before installation?

A: Store the bearings in their original packaging in a clean, dry, and temperature-controlled environment. Avoid exposing them to dust, dirt, or moisture. Do not remove the protective oil coating until immediately before installation to prevent corrosion.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .