Perkins — To check the timing mark of the fuel injection pump (Lucas/Delphi DPA and DPS)

Adjustments

From a Perkins service manual — check it applies to your exact model before use.

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Procedure

1. Remove the fuel injection pump, see Operation 11-31.
2. Fit the adaptor 21825513 (A) to the drive shaft of the fuel pump and fasten with the fuel pump gear nut.
3. Remove the banjo bolt from number 1 high-pressure outlet; fit a banjo bolt which does not contain a pressure valve.
4. Connect number 1 outlet to an atomiser tester and operate the hand pump until 30 atm is indicated on the gauge.
5. Loosen the screw (B3) on timing tool 21825610, set the tool to the correct angle, and tighten the screw.
6. Fit the timing tool to the adaptor and rotate the pump drive shaft by hand in the normal direction until fuel pressure prevents movement.
7. Loosen the screw (B1); slide the pointer (B2) forward over the centre of the pump flange.
8. Check that the mark on the flange is in the centre of the slot in the pointer.
9. If the mark is not correct, eliminate the mark, set the pump at start of injection, and make a new mark through the pointer slot.
10. Remove the timing tool and the adaptor.
11. Disconnect the atomiser tester and fit the original banjo bolt to number 1 high-pressure outlet.
12. Fit the fuel injection pump, see Operation 11-32.
13. Eliminate air from the fuel system, see Operation 11-35.

Source: Perkins service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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