Glacier Diesel Power Fuel Boss Mechanical Lift Pump System | 2005–2007 Dodge Ram 5.9L Cummins
Description
Your common rail Cummins is only as reliable as the fuel feeding it.
The factory in-tank electric lift pump found on the 2005–2007 Dodge Ram 5.9L Cummins performs well when new, but like any electric fuel pump, it eventually becomes a wear item. As mileage increases, pumps can lose pressure, reduce fuel volume under heavy load, or fail without warning—leaving you stranded or starving your injection system of the fuel it depends on.
The Glacier Diesel Power Fuel Boss Mechanical Lift Pump System replaces the factory electric pump with an engine-driven mechanical lift pump that increases fuel output as engine RPM increases. Instead of relying on an electric motor, brushes, bearings, and electronics, the Fuel Boss is powered directly from the crankshaft using a heavy-duty belt drive, providing dependable fuel delivery whenever the engine is running.
At the heart of every Fuel Boss system is the proven FB-1000 straight-cut gear pump. Capable of producing well over 100 PSI, the pump operates at a conservative 2:1 drive ratio, meaning it spins at only half of engine speed. This allows the pump to deliver exceptional fuel volume while operating well below its maximum rated speed, contributing to outstanding longevity.
Unlike traditional electric lift pumps that may lose pressure as demand increases, the Fuel Boss naturally increases output with engine RPM, supplying more fuel precisely when your engine needs it most.
Features
- Designed for 2005–2007 Dodge Ram 2500 & 3500 5.9L Cummins
- Engine-driven mechanical lift pump
- Proven FB-1000 straight-cut gear pump
- No electric motor to overheat or fail
- No internal pump bearings
- Fuel delivery increases with engine RPM
- 100% Viton® shaft seal
- Compatible with ULSD, biodiesel, and many renewable diesel fuels
- High-strength polycarbonate drive pulleys
- Fiberglass-reinforced neoprene drive belt
- Factory lift pump retained for automatic fuel system priming
- Hobbs pressure switch disables factory pump after startup
- Hyper Drive pulley upgrade available
- Designed and manufactured in the USA
Why Upgrade to a Mechanical Lift Pump?
Electric lift pumps operate at a fixed speed.
That means the pump's output is limited regardless of whether the engine is idling or pulling a heavy trailer up a steep grade.
The Fuel Boss works differently.
Because it's mechanically driven by the crankshaft, fuel volume naturally increases as engine speed increases. The harder the engine works, the more fuel the lift pump delivers.
This provides several advantages:
- Stable fuel pressure under load
- Increased fuel volume during acceleration
- Improved support for larger injectors
- Excellent towing performance
- Consistent fuel delivery at higher horsepower levels
Instead of seeing fuel pressure fall during heavy throttle, many owners watch fuel pressure remain stable or even increase.
Glacier Tech Tip
Many customers assume the factory in-tank pump is removed during installation.
It isn't.
The original lift pump remains in the truck but serves a completely different purpose.
When you turn the key on, the factory pump runs briefly to prime the fuel system after filter changes or service. Once the engine starts, a Hobbs pressure switch automatically shuts the electric pump off, allowing the Fuel Boss to take over for normal operation.
This gives you the convenience of automatic priming while eliminating continuous reliance on the factory electric pump.
Why the Fuel Boss Is Different
Most aftermarket lift pumps still depend on electric motors.
That means they contain components that naturally wear over time:
- Electric motors
- Brushes
- Bearings
- Internal electronics
- Wiring
- Relays
The Fuel Boss eliminates nearly all of those failure points.
The FB-1000 gear pump features:
- Precision straight-cut steel gears
- No internal bearings
- Heavy-duty mechanical construction
- 100% Viton® shaft seal
- Low operating RPM
- Exceptional service life
Operating at only half of engine speed, the pump spends most of its life running well below its design limits. With proper belt maintenance, many Fuel Boss systems provide years of dependable service.
Fuel Pressure That Follows Engine Demand
One of the biggest advantages of the Fuel Boss is that it isn't limited by a fixed-speed electric motor.
Traditional electric lift pumps often experience:
- Reduced pressure under heavy load
- Increased current draw
- Heat buildup
- Gradual performance loss as they age
The Fuel Boss instead delivers:
- More fuel as RPM increases
- Stable fuel pressure during acceleration
- Excellent towing performance
- Increased fuel volume for modified trucks
- Reliable fuel supply for high-performance applications
It's an engine-driven solution that responds naturally to engine demand.
Hyper Drive Upgrade
For customers building higher horsepower trucks, Glacier Diesel Power offers the optional Hyper Drive upgrade.
The Hyper Drive changes the drive ratio to increase pump speed by approximately 20%, providing additional fuel volume for larger injectors, aggressive tuning, dual CP3 conversions, and competition-oriented builds.
Applications
Fits:
- 2005 Dodge Ram 2500 5.9L Cummins
- 2005 Dodge Ram 3500 5.9L Cummins
- 2006 Dodge Ram 2500 5.9L Cummins
- 2006 Dodge Ram 3500 5.9L Cummins
- 2007 Dodge Ram 2500 5.9L Cummins
- 2007 Dodge Ram 3500 5.9L Cummins
Engine:
- 5.9L Cummins ISB
- Common Rail Fuel System
Important Notes
- Fits trucks equipped with the factory in-tank lift pump.
- Designed for stock harmonic balancers only.
- Not compatible with Fluidampr® or other oversized aftermarket harmonic balancers due to dimensional differences.
- Factory electric lift pump remains in place for priming only.
- Hobbs pressure switch automatically disables the factory pump after startup.
- Does not ship to California.
- Inspect the drive belt during routine maintenance and replace it approximately every 50,000–75,000 miles, depending on operating conditions.
Common Failure Point
The factory electric lift pump is one of the few continuously operating electric motors in the fuel system.
As mileage accumulates, electric motors, bearings, and brushes naturally wear. Reduced fuel pressure and inconsistent fuel delivery can lead to drivability issues, reduced performance, and unnecessary stress on the common rail fuel system.
The Fuel Boss eliminates the electric pump as the primary fuel supply by replacing it with a durable, engine-driven mechanical pump that delivers dependable fuel volume every time the engine is running.
Complete Your Fuel System
Complete your Fuel Boss installation with:
- Glacier Diesel Power MK-2 Twin Fuel Filter System
- Glacier Diesel Power Severe Service Fuel Filter System
- Fleetguard FS1001 Fuel & Water Separator
- Fleetguard FF5814 NanoNet® 3-Micron Fuel Filter
- Fuel Boss Hyper Drive Upgrade
- Fuel Boss Replacement Mechanical Pump
- Fuel Boss Replacement Belts
- Glacier Diesel Power Fuel Pressure Test Kit
- Glacier Diesel Power Fuel Pressure Test Fittings
Whether your truck is a stock daily driver, a heavy-duty tow rig, or a high-horsepower performance build, the Glacier Diesel Power Fuel Boss Mechanical Lift Pump System provides dependable, engine-driven fuel delivery without relying on the continuous operation of an electric lift pump. By increasing fuel output as engine demand rises, the Fuel Boss delivers the consistent pressure, durability, and reliability that serious Cummins owners expect.
Glacier Diesel Power Fuel Boss Mechanical Lift Pump System | 2005–2007 Dodge Ram 5.9L Cummins
Description
Your common rail Cummins is only as reliable as the fuel feeding it.
The factory in-tank electric lift pump found on the 2005–2007 Dodge Ram 5.9L Cummins performs well when new, but like any electric fuel pump, it eventually becomes a wear item. As mileage increases, pumps can lose pressure, reduce fuel volume under heavy load, or fail without warning—leaving you stranded or starving your injection system of the fuel it depends on.
The Glacier Diesel Power Fuel Boss Mechanical Lift Pump System replaces the factory electric pump with an engine-driven mechanical lift pump that increases fuel output as engine RPM increases. Instead of relying on an electric motor, brushes, bearings, and electronics, the Fuel Boss is powered directly from the crankshaft using a heavy-duty belt drive, providing dependable fuel delivery whenever the engine is running.
At the heart of every Fuel Boss system is the proven FB-1000 straight-cut gear pump. Capable of producing well over 100 PSI, the pump operates at a conservative 2:1 drive ratio, meaning it spins at only half of engine speed. This allows the pump to deliver exceptional fuel volume while operating well below its maximum rated speed, contributing to outstanding longevity.
Unlike traditional electric lift pumps that may lose pressure as demand increases, the Fuel Boss naturally increases output with engine RPM, supplying more fuel precisely when your engine needs it most.
Features
- Designed for 2005–2007 Dodge Ram 2500 & 3500 5.9L Cummins
- Engine-driven mechanical lift pump
- Proven FB-1000 straight-cut gear pump
- No electric motor to overheat or fail
- No internal pump bearings
- Fuel delivery increases with engine RPM
- 100% Viton® shaft seal
- Compatible with ULSD, biodiesel, and many renewable diesel fuels
- High-strength polycarbonate drive pulleys
- Fiberglass-reinforced neoprene drive belt
- Factory lift pump retained for automatic fuel system priming
- Hobbs pressure switch disables factory pump after startup
- Hyper Drive pulley upgrade available
- Designed and manufactured in the USA
Why Upgrade to a Mechanical Lift Pump?
Electric lift pumps operate at a fixed speed.
That means the pump's output is limited regardless of whether the engine is idling or pulling a heavy trailer up a steep grade.
The Fuel Boss works differently.
Because it's mechanically driven by the crankshaft, fuel volume naturally increases as engine speed increases. The harder the engine works, the more fuel the lift pump delivers.
This provides several advantages:
- Stable fuel pressure under load
- Increased fuel volume during acceleration
- Improved support for larger injectors
- Excellent towing performance
- Consistent fuel delivery at higher horsepower levels
Instead of seeing fuel pressure fall during heavy throttle, many owners watch fuel pressure remain stable or even increase.
Glacier Tech Tip
Many customers assume the factory in-tank pump is removed during installation.
It isn't.
The original lift pump remains in the truck but serves a completely different purpose.
When you turn the key on, the factory pump runs briefly to prime the fuel system after filter changes or service. Once the engine starts, a Hobbs pressure switch automatically shuts the electric pump off, allowing the Fuel Boss to take over for normal operation.
This gives you the convenience of automatic priming while eliminating continuous reliance on the factory electric pump.
Why the Fuel Boss Is Different
Most aftermarket lift pumps still depend on electric motors.
That means they contain components that naturally wear over time:
- Electric motors
- Brushes
- Bearings
- Internal electronics
- Wiring
- Relays
The Fuel Boss eliminates nearly all of those failure points.
The FB-1000 gear pump features:
- Precision straight-cut steel gears
- No internal bearings
- Heavy-duty mechanical construction
- 100% Viton® shaft seal
- Low operating RPM
- Exceptional service life
Operating at only half of engine speed, the pump spends most of its life running well below its design limits. With proper belt maintenance, many Fuel Boss systems provide years of dependable service.
Fuel Pressure That Follows Engine Demand
One of the biggest advantages of the Fuel Boss is that it isn't limited by a fixed-speed electric motor.
Traditional electric lift pumps often experience:
- Reduced pressure under heavy load
- Increased current draw
- Heat buildup
- Gradual performance loss as they age
The Fuel Boss instead delivers:
- More fuel as RPM increases
- Stable fuel pressure during acceleration
- Excellent towing performance
- Increased fuel volume for modified trucks
- Reliable fuel supply for high-performance applications
It's an engine-driven solution that responds naturally to engine demand.
Hyper Drive Upgrade
For customers building higher horsepower trucks, Glacier Diesel Power offers the optional Hyper Drive upgrade.
The Hyper Drive changes the drive ratio to increase pump speed by approximately 20%, providing additional fuel volume for larger injectors, aggressive tuning, dual CP3 conversions, and competition-oriented builds.
Applications
Fits:
- 2005 Dodge Ram 2500 5.9L Cummins
- 2005 Dodge Ram 3500 5.9L Cummins
- 2006 Dodge Ram 2500 5.9L Cummins
- 2006 Dodge Ram 3500 5.9L Cummins
- 2007 Dodge Ram 2500 5.9L Cummins
- 2007 Dodge Ram 3500 5.9L Cummins
Engine:
- 5.9L Cummins ISB
- Common Rail Fuel System
Important Notes
- Fits trucks equipped with the factory in-tank lift pump.
- Designed for stock harmonic balancers only.
- Not compatible with Fluidampr® or other oversized aftermarket harmonic balancers due to dimensional differences.
- Factory electric lift pump remains in place for priming only.
- Hobbs pressure switch automatically disables the factory pump after startup.
- Does not ship to California.
- Inspect the drive belt during routine maintenance and replace it approximately every 50,000–75,000 miles, depending on operating conditions.
Common Failure Point
The factory electric lift pump is one of the few continuously operating electric motors in the fuel system.
As mileage accumulates, electric motors, bearings, and brushes naturally wear. Reduced fuel pressure and inconsistent fuel delivery can lead to drivability issues, reduced performance, and unnecessary stress on the common rail fuel system.
The Fuel Boss eliminates the electric pump as the primary fuel supply by replacing it with a durable, engine-driven mechanical pump that delivers dependable fuel volume every time the engine is running.
Complete Your Fuel System
Complete your Fuel Boss installation with:
- Glacier Diesel Power MK-2 Twin Fuel Filter System
- Glacier Diesel Power Severe Service Fuel Filter System
- Fleetguard FS1001 Fuel & Water Separator
- Fleetguard FF5814 NanoNet® 3-Micron Fuel Filter
- Fuel Boss Hyper Drive Upgrade
- Fuel Boss Replacement Mechanical Pump
- Fuel Boss Replacement Belts
- Glacier Diesel Power Fuel Pressure Test Kit
- Glacier Diesel Power Fuel Pressure Test Fittings
Whether your truck is a stock daily driver, a heavy-duty tow rig, or a high-horsepower performance build, the Glacier Diesel Power Fuel Boss Mechanical Lift Pump System provides dependable, engine-driven fuel delivery without relying on the continuous operation of an electric lift pump. By increasing fuel output as engine demand rises, the Fuel Boss delivers the consistent pressure, durability, and reliability that serious Cummins owners expect.