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May 30, 2025

FAQ: What is the process for rebuilding a diesel fuel pump?

FAQ
Jennie Matthews
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Rebuilding a diesel fuel pump, especially for a complex component like an injection pump, is a meticulous process that often requires specialized tools and expertise. While the exact steps can vary depending on the pump type and manufacturer, here’s a general overview of the process:

  1. Initial Assessment: Complete visual inspection and preliminary testing to identify issues
  2. Disassembly: Careful disassembly with specialized tools to prevent component damage
  3. Cleaning: Thorough ultrasonic cleaning of all salvageable components
  4. Component Inspection: Inspection of all internal parts of the pump to identify and diagnose failure points.
  5. Parts Replacement: Replacement of all wear items, including seals, gaskets, bushings, as well as all worn hard parts that are found during inspection.
  6. Reassembly: Careful reassembly with proper torque specifications
  7. Calibration: Calibration and validation of the fuel pump to OEM specifications for proper timing and fuel delivery
  8. Final Quality Control: Final inspection, tagging, painting, and bagging up all needed install fittings and seals for the customer.
  9. Warranty Backing: Completed rebuild backed by our 2-year “repair and return” Fuel Injection Equipment warranty.

This process typically takes 7 business days at authorized Alliant Power service locations.