2001 Cummins Turbo Diesel Lift Pump

 

6/20/03 marks the day I fell victim to the infamous lift pump failure. The pump had 57,300 miles on it when removed.

Fuel Filters have been changed every 10,000 miles, fuel purchased only from truck stops, and Stanadyne Performance Formula has been used with each tank fill. At 30,000 miles after performing a fuel filter change, I noticed the pressure dropped from 13 psi idle to 10 psi. Assuming that it was just the fresh filter causing this I waited for the pressure to return. During the week of 6/20/03, the pressure became sporadic, idling between 9 psi and 5 psi with pressures going as low s 2 psi under moderate throttle. Fearing the pump was about to completely fail, I picked up a new pump from the Cummins distributor for $146 as opposed to the Dodge dealer wanting $216. The pump should be covered under warranty but I would rather spend 3 hours doing it right than waiting 2 days (1 day for Dodge to determine the problem and 1 day to fix it) to hope they fixed it correctly with out contaminating the fuel lines. I have not been able to determine the reason for failure at this point but have compiled photographs of the lift pump itself.

Pump Assembly
Pump Assembly
Part / Serial Number
Part / Serial Number
Impeller Retainer & Gasket
Impeller Retainer & Gasket
Top Removed from Pump
Top Removed from Pump
Pump Inlet
Pump Inlet

Impeller Removed
Impeller Removed

Impeller
Impeller
Impeller / Regulator
Impeller / Regulator

Pump Disassembled
Pump Housing
Pump Housing
Pressure Regulator
Pressure Regulator
 

Regulator assembly

Regulator parts

Regulator seat

Pressure
Regulator
Components

Impeller Vane
Impeller Vane
Pump's Brushes and Commutator
Pump's Brushes and Commutator
Brush
Brush
With the new pump installed, pressures are 15-14 psi idle, 13-12 psi cruise and 10 psi WOT. Throttle response seems to be much smoother with the new pump.

 

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This page was edited on: July 7, 2003