Product Details

Product Overview

This premium Cummins Engine Oil Pump (Part Number: 3930338) is a direct replacement for the 6CT and 6CT8.3 diesel engine series. Designed to meet or exceed OEM specifications, this critical lubrication component ensures consistent oil pressure and flow to protect your engine from premature wear. Our global supply network ensures fast, reliable shipping to major industrial centers in North America, Europe, Asia-Pacific, the Middle East, and Africa, supporting heavy equipment, marine, and power generation applications worldwide.

Key Features & Benefits

• OEM Quality Fitment: Precision-engineered to match the original Cummins 3930338 specifications for a hassle-free installation.
• Enhanced Durability: Constructed from high-grade cast iron and hardened steel gears to withstand high-pressure operation and extreme temperatures.
• Optimal Lubrication: Delivers consistent oil flow to crankshaft, connecting rods, and turbocharger, reducing friction and extending engine life.
• Rigorous Testing: Each pump undergoes pressure and flow bench testing to ensure compliance with OEM performance standards.
• Cost-Effective Solution: A reliable aftermarket alternative to expensive dealer parts without compromising on quality or longevity.

Technical Specifications

OEM Cross-Reference

• OEM Number: 3930338
• Alternate/Cross Numbers: 3930337, 4906485, 3800233
• Interchange: Replaces genuine Cummins parts with identical fit and function.

Compatibility

• Engine Series: Cummins 6CT (6.7L), 6CT8.3 (8.3L)
• Applications: Heavy-duty trucks, construction machinery (excavators, loaders), agricultural tractors, marine propulsion, and generator sets.
• Year Range: 1990s–2010s (Check specific engine serial number for exact fitment).

Global Supply & Distribution

• Worldwide Shipping: We deliver to 50+ countries via DHL, FedEx, UPS, and sea freight.
• Major Markets: USA, Canada, Germany, UAE, Saudi Arabia, Australia, Singapore, South Africa, and Brazil.
• Fast Delivery: Stock available for immediate dispatch from regional warehouses in Houston (USA), Rotterdam (Netherlands), and Shanghai (China).
• Trade Compliance: All shipments include necessary export documentation and customs support.

Quality Assurance

• Certifications: Manufactured in ISO 9001:2015 certified facilities.
• Warranty: 12-month warranty against manufacturing defects.
• Testing: 100% pressure and flow tested prior to packaging.

FAQ

Q1: Is this oil pump a direct replacement for my Cummins 6CT8.3 engine?
Yes, the 3930338 oil pump is a direct bolt-on replacement for the 6CT and 6CT8.3 series. It matches OEM dimensions and mounting points, requiring no modifications. Always verify your engine’s serial number to confirm compatibility with your specific model variant.

Q2: What are the signs that my oil pump needs replacement?
Common symptoms include low oil pressure warnings on the dashboard, unusual engine noise (rattling or knocking), and decreased lubrication leading to overheating. If you observe any of these, replace the pump immediately to prevent catastrophic engine failure. We recommend replacing the pump during major engine overhauls.

Q3: Do I need to prime the oil pump before installation?
Yes, to prevent dry start damage, you should prime the pump by packing the gear cavity with clean engine oil or assembly lubricant before installation. This ensures immediate oil pressure upon startup. Failure to prime can result in temporary bearing starvation.

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 .