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Home›Repair guides›Fuel System Pressure Test and Relief Valve Adjustment

GE — Fuel System Pressure Test and Relief Valve Adjustment

A GE service procedure — check it applies to your exact model before use.

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Before you start

  • Do not tighten plug excessively or filter head may be cracked.

Procedure

  1. Remove 1/2 inch pipe plug and install a calibrated 100 psi test gauge at the test point.
  2. Remove secondary filter discharge pipe and install a 3/4 inch pipe plug in opening.
  3. Start booster pump and observe test pressure gauge.
  4. To correct valve setting, remove valve cap and loosen adjustment locknut.
  5. Adjust valve as needed according to DATA specifications.

Tools required

  • Calibrated 100 psi test gauge
  • 3/4 inch pipe plug
  • 1/2 inch pipe plug

Specs & torque values

  • Fuel pressure specification per DATA

Source: manual:GE-7FDL16-diesel-ServiceManual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.