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SKU:
NLT2T00603
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Fuel Lift Pump for Cummins 4B 4BT 4BTA 6B 6BT 6BTA – 3970880 4983584
$63.49
In Stock
$63.49
Sale price
$63.49
Regular price
This is a brand new mechanical fuel lift pump for Cummins B-series engines: 4B, 4BT, 4BTA, 6B, 6BT, 6BTA; also common 4B3.9 / 6B5.9 applications. Key reference number(s): 3970880, 4983584, 3966154; related references 3901425, 3903538, 3904374, 3928143.
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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
| Make / Application | Compatible Models / Details |
|---|---|
| Cummins B-series engines | 4B, 4BT, 4BTA, 6B, 6BT, 6BTA; also common 4B3.9 / 6B5.9 applications |
Product Overview
A mechanical low-pressure transfer pump for classic Cummins B-series diesel applications. It supplies fuel to the injection system and is widely cross-referenced by 3970880 and 4983584.
Extended cranking, loss of prime and fuel starvation under sustained load are common reasons to test the lift pump. Suction leaks, plugged filters and tank restrictions should be ruled out first.
Key Features & Performance
- Restores low-pressure fuel supply to the injection system.
- Mechanical operation avoids reliance on a separate electric feed pump.
- Flange, lever and port arrangement should match the original.
Specifications & Reference Numbers
- Reference number(s): 3970880, 4983584, 3966154; related references 3901425, 3903538, 3904374, 3928143
Before You Order
Compare reference number, actuator lever, flange and fuel-port arrangement. Cummins B-series engines were installed in many machines with different fuel-system layouts.
Frequently Asked Questions
Q: What should I verify before ordering?
A: Compare reference number, actuator lever, flange and fuel-port arrangement. Cummins B-series engines were installed in many machines with different fuel-system layouts.
Q: Why would this part need to be replaced?
A: Extended cranking, loss of prime and fuel starvation under sustained load are common reasons to test the lift pump. Suction leaks, plugged filters and tank restrictions should be ruled out first.
Q: Is this an OEM part?
A: This listing is for a replacement component. Manufacturer names and reference numbers are used to identify fitment; compare the original part number and configuration before ordering.