Section 6.2 Check Pump Timing

Section 6.2
Check Pump Timing

Time the fuel pump as follows:‪

  1. Disconnect the battery power.
  2. Install engine barring tool J-46392 to flywheel housing.
  3. Rotate the flywheel until the dot that is located inside the tooth is aligned with edge of pointer and install pin.
    Click to see this graphic in a separate window

     1. Edge of Pointer‪

     3. Barring Tool Location‪

     2. Dot Located Inside of Tooth‪

    Note: Cylinder No. 1 can be positioned on either the firing stroke or exhaust stroke. Both valves will be closed when cylinder number one is at TDC and the camshaft lobes will be positioned inward.

  4. Remove rocker cover and ensure cylinder No. 1 is at top dead center (TDC) in the firing position.
    1. If cylinder No. 1 is not at TDC firing position, rotate the engine one more revolution and position timing mark as shown in the previous illustration.
  5. Remove inspection cover located on flywheel housing.

    Note: All new pumps factory or service install will be timed at the twelve o'clock position.

  6. Using a telescoping mirror check and ensure the hash mark is at the twelve O'clock position.
    1. If the hash mark is not at twelve o'clock position; remove the pump and reinstall at the twelve o'clock position.
  7. Using a telescoping mirror compare the radius of the eyebrow to the gear radius.
    1. If the eyebrow radius intersects with the gear radius, the pump is out of time with the gear train. The next illustration show the intersecting radius with the pump installed one tooth off.
      Click to see this graphic in a separate window
    2. Remove high pressure pump and inspect for damage.
    3. If no damage is found, reinstall pump at proper timing.
    4. If the eyebrow radius does not intersect with the gear radius, the pump is in time with the gear train.
      Click to see this graphic in a separate window


DD15 Fuel System Technician's Guide - DDC-SVC-MAN-0037
Generated on 10-13-2008

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