Skip to product information
SKU:
NLT2T00605
Ships for free in 2–4 business days.
Fuel Lift Pump for Cummins 4B 4BT 4BTA 6B 6BT 6BTA / Case IH – 3970880 / 3966154
$63.49
In Stock
$63.49
Sale price
$63.49
Regular price
This mechanical fuel lift pump cross-references Cummins 3970880 and 3966154 for compatible B-series diesel engine and Case IH applications.
Estimated delivery between
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
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
| Brand / Equipment | Compatible Models / Engines | Fitment Notes |
|---|---|---|
| Cummins | 4B, 4BT, 4BTA | B-series engines |
| Cummins | 6B, 6BT, 6BTA | B-series engines |
| Case IH | Equipment using applicable Cummins B-series engine/pump configuration | Verify machine/engine serial |
Product Overview
The lift pump supplies low-pressure fuel to the injection system. When it weakens, the engine may become difficult to prime, lose power under load, stall after running, or show fuel starvation even though the injection pump itself is functional.
The 3970880/3966154 references are commonly associated with Cummins 4B, 4BT, 4BTA, 6B, 6BT and 6BTA families used in agricultural and industrial equipment. Final fitment should be confirmed by engine CPL/serial and the existing pump’s inlet/outlet and mounting arrangement.
Key Features & Performance
- Low-pressure fuel supply / lift function
- Cross-references Cummins 3970880 and 3966154
- Applicable to multiple 4B- and 6B-series diesel configurations when the original pump number matches
Reference Part Numbers
- 3970880
- 3966154
Product Details
- Component: Mechanical fuel lift / feed pump
What to Verify Before Ordering
Confirm engine CPL/serial, original pump number, mounting flange and line fittings before ordering.
Frequently Asked Questions
What is the difference between a lift pump and injection pump?
The lift pump supplies fuel at low pressure to the high-pressure injection system; it does not meter injection to each cylinder.
Can a clogged filter look like a failed lift pump?
Yes. Check filters, tank pickup, hoses and air leaks before replacing the pump.