Keep Your Cummins Diesel Running Without Interruption

A weak or failing fuel transfer pump starves your injection system — leading to hard starts, power loss, and costly downtime. This direct-fit Fuel Transfer Lift Pump (Part# 4935007 / 3944386) restores reliable low-pressure fuel delivery to your Cummins 8.3L diesel engine, right out of the box.

Fits:

• Cummins 8.3L ISC
• Cummins 8.3L ISL
• Cummins 8.3L QSL
• Cummins 8.3L QSC
• 12V systems

Why Choose This Pump?

• ✅ Dual OEM part number match — replaces both 4935007 and 3944386 for guaranteed fitment
• ✅ Consistent low-pressure fuel supply — keeps your injection pump primed and performing under heavy load
• ✅ Built for commercial & industrial demands — engineered to handle continuous cycling, pressure variation, and high-load operation
• ✅ Direct drop-in replacement — no modifications, no adapters; installs like the original
• ✅ 100% new, aftermarket quality — not remanufactured or refurbished

Specs:

• Condition: 100% New
• Type: Aftermarket
• Voltage: 12V
• Part Numbers: 4935007 / 3944386
• Application: Cummins 8.3L ISC, ISL, QSL, QSC

Whether you're running a commercial truck, generator, or industrial equipment powered by a Cummins 8.3L, this pump delivers the fuel system reliability your engine depends on. Order with confidence — exact fitment, no guesswork.