Workshop Manual

0312 1599 - 0138

2/4

Fuel system

W 07-07-02

2011

Check injection nozzle

z The nozzle needle (1) must slide back to its seat

slowly and jolt-free by its own weight when the

nozzle body (2) is held vertically.

Note

- Do not touch the nozzle needle with your

fingers.

- The nozzle needle and nozzle body are

lapped together and may not be switched

round or changed individually.

- If the nozzle needle slides back with a jolt,

clean the injection nozzle in diesel fuel again,

renew if necessary.

- Also clean the new injection nozzle in clean

diesel fuel.

z Inspect the seat surfaces of the adapter for wear.

Note

Make sure the centering pins (arrows) are in

place.

Complete injection valve

z Insert shim disc.

Note

The opening pressure depends on the

strength of the shim disc.