4983584 3904374 Fuel Transfer Pump for Cummins 4BT 6BT Engine

4983584 3904374 Fuel Transfer Pump for Cummins 4BT 6BT B Series Engines

The 4983584 3904374 fuel transfer pump is used for Cummins 4BT 6BT 4B 6B B Series diesel engine fuel supply systems. It is commonly ordered as a mechanical fuel lift pump when the engine has weak fuel delivery, hard starting, unstable idle, power loss or air-in-fuel symptoms.

This page is focused on the same fuel pump reference group. 4983584 and 3904374 can stay together on one product page because they are commonly listed as cross references for Cummins B Series fuel transfer pump applications. Other numbers can be used as checking references, but the main search intent should remain 4983584 3904374 Cummins 4BT 6BT fuel pump.

Why 4983584 and 3904374 Can Be Listed Together

Many buyers search this product by the pump number stamped on the old part, while others search by engine model or fuel system name. In aftermarket and parts database references, 4983584 and 3904374 are commonly grouped with related Cummins B Series fuel transfer pump numbers.

For SEO and buyer clarity, this page should use 4983584 3904374 as the main pair, then place other references such as 3901425, 3966154 and 3970880 inside the technical table instead of forcing every number into the H1.

Product Identification and Cross Reference Data

Application Scene: Cummins B Series Equipment Fuel Supply Repair

This pump is not limited to one machine model. Cummins 4BT and 6BT engines are used in construction machinery, agricultural machines, generator sets, trucks, forklifts, industrial engines and older equipment conversions. A buyer may search by engine model, machine model, old pump number or fuel pump symptom.

For a repair shop, the key question is usually whether the old pump is a matching mechanical lift pump with the same mounting style and fuel line connection. For parts distributors, the key value is that one clean product page can cover both 4983584 and 3904374 search demand without splitting the traffic into two thin pages.

If the engine has been swapped, rebuilt or converted, confirm the old pump physically before ordering. Engine model alone is useful, but the removed pump and mounting face are more reliable for final confirmation.

Common Symptoms of a Failing Fuel Transfer Pump

How to Confirm the Correct Pump Before Ordering

Before ordering 4983584 3904374, compare the old fuel pump number, mounting holes, lever shape, fuel inlet and outlet direction, gasket shape and engine model. If the old pump is available, photos from multiple angles are the safest way to reduce wrong-part risk.

For Cummins 4BT and 6BT engines, the same engine family may appear in different equipment brands and market versions. Some machines use replacement engines, rebuilt fuel systems or aftermarket pump assemblies. Do not rely only on the equipment model.

Buyers can send the old pump photos, engine nameplate, machine model and any visible part number marks to Topvelsun before shipment for checking.

Mechanical Fuel Lift Pump Installation Notes

Clean the mounting surface before installing the new pump. Old gasket material, dirt or uneven contact can cause fuel leakage or air entry into the fuel system.

Check the fuel line direction before tightening the fittings. Incorrect inlet and outlet connection can cause poor fuel delivery or no-start symptoms after installation.

Replace or inspect the fuel filter during pump replacement. A blocked filter can make a new pump look weak even when the pump itself is working correctly.

After installation, prime the fuel system, check for leakage, remove air from the fuel line and monitor starting performance, idle stability and power under load.

What Makes This Page Different from a Simple Listing

Many fuel pump listings only show a part number and a short engine line. This page is built to help buyers confirm whether 4983584 3904374 matches the actual Cummins B Series fuel system before ordering.

The important checks are not only the part number. Buyers should also confirm pump type, mounting pattern, gasket requirement, fuel line direction, engine model and the symptoms that led to replacement.

This helps repair shops, fleet buyers and distributors reduce wrong orders when sourcing remotely.

Why Source 4983584 3904374 from Topvelsun?

Topvelsun supplies replacement engine parts and fuel system parts for construction machinery, trucks, generator sets, agricultural equipment and industrial diesel engines. For 4983584 3904374 orders, we help buyers check the old pump number, engine reference and mounting details before shipment.

This product is suitable for repair workshops, fleet maintenance teams, diesel engine rebuilders, parts distributors and overseas buyers working on Cummins 4BT 6BT B Series fuel supply repair.

FAQ

Are 4983584 and 3904374 the same fuel pump reference group?

Yes. 4983584 and 3904374 are commonly listed together as Cummins B Series fuel transfer pump references. Final fitment should still be checked by old pump, engine model and mounting style.

What engines does this fuel transfer pump fit?

This pump is commonly used for Cummins 4B, 4BT, 4BTA, 6B, 6BT and 6BTA engine references. Buyers should verify the old pump number and engine configuration before ordering.

Is this a fuel transfer pump or fuel lift pump?

Both names are used in the market. This item is a mechanical fuel supply pump that transfers fuel from the tank side toward the engine fuel system.

Should all cross reference numbers be placed in the title?

No. The title should stay focused on 4983584 3904374 and Cummins 4BT 6BT. Other numbers such as 3901425, 3966154 and 3970880 are better placed inside the product description as checking references.

Can Topvelsun help verify the correct pump before shipment?

Yes. Buyers can send old pump photos, engine nameplate, machine model and visible part number marks. Topvelsun can help compare the information before order confirmation.