Atomiser fault
Warning!
If your skin contacts the high-pressure fuel, seek medical assistant immediately.
Keep away from moving parts during engine operation. Some moving parts cannot be seen clearly while the
engine runs.
An atomiser fault can cause an engine misfire.
In order to find which atomiser is defective, operate the engine at a fast idle speed. Loosen and tighten the union nut
of the high-pressure fuel pipe at each atomiser. When the union nut of the defective atomiser is loosened, it has little
or no effect on the engine speed.
How to renew an atomiser
Attention:
Do not allow dirt to enter the fuel system. Before a connection is disconnected, clean thoroughly the area
around the connection. After a component has been disconnected, fit a suitable cover to all open connections.
1. Remove the fuel leak off pipe.
2. Remove the union nuts of the high-pressure pipe from the atomiser and from the fuel injection pump (A1). Do
not bend the pipe. If necessary, remove the pipe clamps.
3. Remove the atomiser flange setscrews and remove the flange (A2), the atomizer (A6) and its seat washer (A7).
Remove the dust seal (A5) and the spacer (A4) and fit the spacer and a new dust seal onto the new atomiser.
4. Put the new atomiser in position with its spacer, new dust seal and a new seat washer. Ensure that the fuel
leak-off connection (A3) is not toward the engine. Fit the flange and engage the flange setscrews. Ensure that the
atomiser is not tilted and tighten the flange setscrews evenly and gradually to 12 Nm 1,2 kgf m..
Attention:
Do not tighten the nuts of the high pressure pipes more than the recommended torque tension. If there is
a leakage from the union nut, ensure that the pipe is correctly aligned with the atomiser inlet. Do not tighten the
atomiser union nut more, as this can cause a restriction at the end of the pipe. This can affect the fuel delivery.
5. Fit the high-pressure fuel pipe and tighten the union nuts to 22 Nm 2,2 kgf m.. If necessary, fit the pipe clamps.
6. Renew the aluminum washers and fit the leak-off pipe.
7. Operate the engine and check for leakage of fuel and air.
4.11
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