Cummins ISB QSB 5.9L 3.9L Heavy Duty Engine Oil Pump 4939587 5346430 for Dodge Ram 2500 3500

Product Details

Product Overview

This is a premium, heavy-duty engine oil pump designed for the Cummins B-series engine family, specifically the ISB, QSB, 4BT, and 6BT models. As a critical component for engine lubrication, this pump ensures consistent oil pressure and flow, protecting your engine from premature wear. Our supply chain supports global shipping to major industrial markets including North America, Europe, Asia-Pacific, and the Middle East, ensuring fast and reliable delivery to your workshop or fleet.

Key Features & Benefits

• Precision Engineering: Manufactured to meet or exceed OEM specifications for a perfect fit and reliable performance.
• High Durability: Constructed from high-strength cast iron and hardened steel gears to withstand high pressure and continuous operation.
• Optimized Oil Flow: Designed to provide stable oil pressure from idle to full throttle, reducing engine wear and extending service life.
• Direct Replacement: A direct bolt-on replacement for the original equipment pump, simplifying installation and reducing downtime.
• 100% Tested: Each unit is tested for pressure and flow rate to ensure peak performance and reliability.

Technical Specifications

OEM Cross-Reference

This oil pump is a direct replacement for the following OEM and aftermarket part numbers:

• Cummins OEM: 4939587, 5346430
• Interchange Numbers: 3925395, 3970545

Compatibility

This oil pump is specifically designed for the following engine models and vehicle applications:

• Engine Models: Cummins 4BT 3.9L, 6BT 5.9L, ISB 5.9L, QSB 5.9L/6.7L
• Vehicle Applications: Dodge Ram 2500 & 3500 (1998.5-2002 with 5.9L ISB), Dodge Ram 2500 & 3500 (1989-1998 with 5.9L 12V)
• Other Equipment: Ford F-Series (with Cummins conversion), various agricultural and industrial machinery using the B-series engine.

Global Supply & Distribution

We are a leading supplier of heavy-duty engine parts with a robust global distribution network. We offer:

• Worldwide Shipping: Reliable shipping via sea, air, and express couriers to all continents.
• Major Markets Served: North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands), Asia-Pacific (Australia, Japan, Singapore), Middle East (UAE, Saudi Arabia).
• Fast Delivery: Efficient logistics to major ports like Los Angeles, Rotterdam, and Shanghai, and direct to industrial centers.
• Trade Compliance: Full compliance with international trade regulations and experienced export documentation.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001 certified facilities, ensuring consistent quality control.
• Warranty: Backed by a standard 12-month warranty against manufacturing defects.
• Testing: Each pump undergoes rigorous testing for pressure output, flow rate, and dimensional accuracy before shipment.

FAQ

Q: Is this a direct replacement for the original Cummins oil pump on my 1999 Dodge Ram 2500 with a 5.9L ISB?

A: Yes, this pump (part numbers 4939587 and 5346430) is the direct OEM replacement for the 5.9L ISB engine found in 1998.5-2002 Dodge Ram 2500 and 3500 trucks. It bolts directly on without modifications.

Q: What are the signs that my engine oil pump needs to be replaced?

A: Key indicators include low oil pressure at idle or high RPM, unusual engine noise (specifically from the timing cover area), and the oil pressure warning light illuminating. If your engine has high mileage or has been run low on oil, replacing the pump is a good preventive measure.

Q: Do I need to replace any other parts when installing a new oil pump?

A: It is highly recommended to replace the oil pump gasket and the front crankshaft seal. While the timing cover is off, inspecting the timing chain and gears is also a best practice. Always use new engine oil and a new oil filter after installation.