Bosch 5302 Technical Information download pdf (Page 39)

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Workshop Manual_3 - 4 LD_cod. ED0053025560_4° ed_ rev. 03

ADJUSTMENT

Minimum rpm adjustment at idle running (standard)

After lling the engine with oil and fuel, start and warm up the

engine for 10 minutes.

Actuating the adjusting screw 1, set the idling at 1150 rpm; then

fasten the lock nut.

Injection pump delivery adjustment (standard)

This adjustment shall be carried out with the engine at

dynamometric brake, otherwise the resulting adjustment could

be approximate; in this case operate as it follows.

· Unloose the screws 1 and 2 by 1/4 of a turn

· Move the limiting device 3, thus the screw 2 stays in the centre

of the slot. Tighten the screws 1 and 2.

Carry out the exhaust smoke check as it follows:

· Abruptly start the accelerator at idle.

In case of a quick pickup with light exhaust smoke to the Bosch

scale index 3, this means that the limiting device is correctly

adjusted.

· In case of a slow pickup without smoke, move the limiting

device towards the left (pumping duration increase).

· In case of a rapid pickup with thick smoke (exceeding index

3 of Bosch scale), move the limiting device towards the right

(pump duration decrease).

Peak rpm adjustment at idle (standard)

After adjusting the minimum rpm, set the screw 2 and adjust the

peak rpm at 3200 rpm at idle; then fasten the lock nut.

Note: The peak rpm standard idle adjustment of 4LD 820 shall

be carried out at 2800 rpm.

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Bosch 5302 Technical Information Page 39