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

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Procedure

1. Use the compact disc that is included with a
2. Enter the serial number for the electronic unit
3. Download the injector trim file to the PC. Repeat
4. Connect the electronic service tool to the
5. Turn the keyswitch to the ON position.
6. Select the following menu options on the electronic
7. Service
8. Calibrations
9. Injector Trim Calibration
10. Select the appropriate cylinder.
11. Click on the “Change” button.
12. Select the appropriate injector trim file from the

Source: manual:cd0c0b.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.