Perkins D3.152 - Atomiser Fault; How to Renew an Atomiser

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26 User’s Handbook, TPD 1285E, Issue 2
3.152
Atomiser fault
Warnings!
z Ensure that the fuel does not spray onto your skin.
z 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
Warning! 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. Do not
bend the pipe. If necessary, remove the pipe clamps.
3 Remove the atomiser flange nuts and remove the atomiser (A1) and its seat washer. Remove the dust seal
(A2) and the spacer (A3) and fit the spacer and a new dust seal on 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 is not toward the engine. Ensure that the atomiser is not tilted and tighten the flange nuts
evenly and gradually to 16 Nm (12 Ibf ft) 1,7 kgf m. If the atomiser is retained by a separate clamp, tighten the
nuts to 12 Nm (9 Ibf ft) 1,2 kgf m.
Warning! 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 (16 Ibf ft) 2,2 kgf m. If necessary, fit the
pipe clamps.
6 Renew the aluminium washers and fit the leak-off pipe.
7 Operate the engine and check for leakage of fuel and air.
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