New CAV DPA and DPS fuel injection pumps which will automatically eliminate air from the pump have been introduced on some engines. These pumps have a vent pipe (A1) fitted between the top of the pump and the atomiser leak-off pipe. Vent screws are not fitted to these pumps and connections or plugs need not be released to eliminate air from the pump.
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To eliminate air from the fuel system
If the system or a component in the system has been drained:
1 Turn the start key to the ‘R’ position. If a manual stop control is fitted, ensure that it is in the’run’ position.
2 Operate the lever of the fuel lift pump slowly for approximately two minutes.
3 Operate the starter motor until the engine starts.
If the engine has been stopped by air in the fuel system:
1 Ensure that there is sufficient fuel in the tank, or that the fuel or air leaks have been corrected.
2 If a manual stop control is fitted, ensure that it is in the run position.
3 Operate the starter motor until the engine starts.
More Perkins case,please refer to:Perkins Engine Trouble Repair
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