Microswitch of fuel injection pump (Mercedes-Benz Vito W638)

1. Microswitch S70 is attached to the fuel injection pump with bolts. To remove it, disconnect the wiring connector 1 from it and unscrew the bolts that secure it (see figure 4.66).

Adjusting the microswitch

2. Remove the fuel injection pump mounting bracket from the cylinder block.

3. Install the adjusting shim 8c in position E (installation) on the bolt 8f of the high-pressure fuel pump (see figure 4.67). Bolt 8f is located at the rear of the injection pump. Adjusting shim (at which the microswitch switches off in position 10 before full load) shown in the picture 4.68.





4. Attach the installation device to the front part of the injection pump. The installation device for installing the injection pump microswitch is shown in the figure 4.69. To install it, insert bolt 1 with nut 2 into the through hole. Bolt 1 is designed to attach the device to the high-pressure fuel pump. Screw bolt 3 into the M5 threaded hole. Bolt 3 is designed for precise adjustment of the longitudinal lever.





5. Loosen bolt 8d.

6. Press the fuel injection pump rack control lever 16 until it stops and fix it in this position.

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7. Rotate the longitudinal lever 8e until both disengagement points (two clicks) microswitches will not be overcome. Adjust the position of the trailing arm by rotating the cam bolt of the setting device.

8. Loosen the fuel injection pump rack control lever.

Examination

9. Install adjusting shim 8c in position P (check) on bolt 8f of the high-pressure fuel pump.

10. Press the fuel injection pump rack control lever 16 until it stops and fix it in this position. If the installation is correct, only the first switch position point should be passed (one click). If necessary, repeat the adjustment.

11. Remove the mounting device.

12. Install the fuel injection pump mounting bracket.

• Injection pump longitudinal lever microswitch points: 10° and 15°