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SKU:
NLT2T01466
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Fuel Transfer Pump 3917998 3917999 4988749 for Cummins 4BT 6BT 5.9L
$78.99
In Stock
$78.99
Sale price
$78.99
Regular price
This fuel transfer pump replaces Cummins references 3917998, 3917999 and 4988749 for compatible 4BT and 6BT/5.9L diesel engine applications.
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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
| Engine | Cummins 4BT, 6BT and related B-series 5.9L applications using this pump family |
|---|
Product Overview
The transfer pump feeds diesel from the tank toward the injection system. When it weakens, the engine may be difficult to prime, start and then stall, lose power under load, or show fuel-starvation symptoms even when the injection pump itself is serviceable.
The 3917998/3917999/4988749 number group is widely associated with Cummins B-series mechanical diesel applications, including 4BT and 6BT 5.9L engines. Engine installation and fuel-line routing can differ by equipment manufacturer, so use the old pump number and mounting pattern as the final fitment check.
Key Features & Performance
- Restores low-pressure fuel supply to the injection system
- Common B-series transfer-pump replacement number group
- Useful for hard-start, loss-of-prime and fuel-starvation repairs
- Designed around the original mechanical pump mounting location
Specifications & Reference Numbers
- References: 3917998, 3917999, 4988749
- Part type: Fuel transfer / lift pump
- Application: Mechanical diesel fuel-supply system
Before You Order
Confirm one of the listed Cummins numbers on your original pump or parts book. Compare inlet/outlet orientation and actuator/lever configuration before installation.
Frequently Asked Questions
What should I use as the final fitment check? Use the listed part/reference numbers, your exact engine or machine model, and the physical configuration of the part being replaced. Serial-number and production changes can matter.
What are common reasons to replace this part? The transfer pump feeds diesel from the tank toward the injection system. When it weakens, the engine may be difficult to prime, start and then stall, lose power under load, or show fuel-starvation symptoms even when the injection pump itself is serviceable.