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SKU:
NLT2T03551
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Fuel Pump for Cummins 4B/4BT/6B/6BT/6CT Engines – 7901-050
$67.99
In Stock
$67.99
Sale price
$67.99
Regular price
This fuel pump fits Cummins 4B, 4BT, 6B, 6BT and 6CT diesel applications that use reference 7901-050.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
| Cummins engines | 4B |
|---|---|
| 4BT | |
| 6B | |
| 6BT | |
| 6CT | |
| B3.9L 8-valve applications | |
| B5.9L 12-valve applications |
Product Overview
The pump supports the engine's low-pressure fuel supply so the injection system receives an adequate flow of diesel. Symptoms of a weak supply pump can include extended cranking, unstable running, power loss under load or repeated need to prime the system.
Replacement catalogs specifically list 7901-050 for Cummins 4B/4BT/6BT/6CT and B3.9/B5.9 families. Because Cummins used multiple pump styles within these engines, the 7901-050 reference and physical mounting arrangement should be matched.
Key Features & Performance
- Reference 7901-050
- Cummins B- and C-series application coverage
- Low-pressure fuel supply function
- Direct service replacement when pump output is confirmed low
Part Numbers & Specifications
- Part number: 7901-050
- Component: fuel feed / lift pump
- Fuel: diesel
Before You Order
Confirm 7901-050 or the exact old pump number before ordering. Check filters, tank venting and suction hoses because restrictions can produce the same symptoms as a weak pump.
Frequently Asked Questions
Does this fit every 4BT or 6BT?
No. Those engines were built in many configurations; match 7901-050 and the pump layout.
Can a weak pump cause power loss?
Yes, especially when fuel demand rises under load.
Should supply pressure be tested?
When possible, testing pressure/flow is better than replacing the pump based on symptoms alone.