Skip to product information
Usually ships in 2–4 business days.
12V Fuel Transfer Pump 5260632 3968187 for Cummins 3.9L & 5.9L ISB ISL QSL ISC
$149.99
Sale price
$149.99
Regular price
Available to Order
Designed for compatible Cummins equipment, this aftermarket fuel transfer pump helps restore steady fuel delivery and reliable engine operation.
Not sure which part fits your equipment?
Our Northline Parts team can help you find the right replacement. 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
Product Overview
The fuel pump supplies fuel to the engine at the pressure and flow required by the system. A weak or failed pump may cause hard starting, hesitation, fuel starvation, intermittent operation, or loss of power under load.
Replacement references include 5260632 and 3968187. Match the part number, voltage where applicable, mounting points, ports, and electrical connector with your original part.
Key Features & Performance
- Restores fuel flow to the engine
- Helps correct fuel-delivery problems caused by a failed pump
- 12V design for compatible electrical systems
- Practical replacement for a worn or damaged original unit
Fitment & Compatibility
Compatible with select Cummins 3.9L & 5.9L ISB ISL QSL ISC applications. Serial-number breaks, production changes, or equipment options may affect the required part.
Technical Specifications
- Product Type: Fuel Transfer Pump
- Compatible Brand: Cummins
- Part Number(s): 5260632, 3968187
- Voltage: 12V
Frequently Asked Questions
Q: Can a bad fuel pump cause hard starting or loss of power? A: Yes. A weak or failed pump can restrict fuel delivery, although filters, wiring, lines, and other fuel-system components should also be checked.
Q: Is this an original OEM part? A: No. It is an aftermarket component made to replace the listed part in compatible equipment.
Confirm the original part number and physical configuration before ordering, especially when multiple versions were used.