Lovol 1004-4, User Handbook Manual, Page: 36 / 87

Self-vent method:
This method is used on the Lucas and all Stanadyne fuel injection pumps. Vent screws are not fitted to these pumps.
Attention:
Although some fuel injection pumps will eliminate air automatically, below procedure shall be followed
to remove air from the fuel system after emptying fuel or the main parts has been removed:
Ensure that fuel has been added to the tank or that the leakage has been corrected.
1. Release the vent plug (B) on the fuel filter head.
2. Operate the priming lever of the fuel lift pump (C) until fuel, free from air, comes from the vent screw(s).Tighten
the vent plug.
Remark:
If the drive cam of the fuel lift pump is at the point of maximum cam lift, it will not be possible to operate
the priming lever. In this situation, the crankshaft must be turned one revolution.
3. If the fuel pipe on the fuelled starting aid has been emptied, loosen the union nut (A1) at the fuelled starting aid
(if one is fitted) and operate the lift pump until fuel, free from air, comes from the connection. Tighten the union
nut at the starting aid. A wrench shall be put on the nut head of fuelled starting aid device to prevent the
movement during tightening or loosing the union nut
4. Loosen the union nuts of the high-pressure pipes (B1) at two of the atomisers.
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. Put the switch of the electric system
（
3
，
03/A
）
to the “ON” position. If a manual stop control equipped, ensure
that it is in the "run" position. Operate the starter motor until fuel, free from air, comes from the pipe connections.
Tighten the high-pressure pipe connections up to 22N, 22Kg.f.m.Return the switch to its “OFF” position.
6. The engine is now ready to start. If the engine runs correctly for a short time and then stops or runs roughly,
check for air in the fuel system. If there is air in the fuel system, there is probably a leakage in the low pressure
system.
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