Diesel Engine Parts
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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.
| Specification | Details |
|---|---|
| Part Number | 4939587, 5346430 |
| Engine Model | Cummins ISB, QSB, 4BT, 6BT |
| Displacement | 5.9L (6BT/ISB), 3.9L (4BT) |
| Material | High-Strength Cast Iron Housing, Hardened Steel Gears |
| Type | Gear Type Oil Pump |
| Application | Heavy Duty Truck, Agricultural, Industrial |
This oil pump is a direct replacement for the following OEM and aftermarket part numbers:
This oil pump is specifically designed for the following engine models and vehicle applications:
We are a leading supplier of heavy-duty engine parts with a robust global distribution network. We offer:
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.
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.
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.
A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.
A: Normally we can supply any quantity if we have in stock.
A: We accept Western Union, T/T, Paypal.
A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.
A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .
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 .
