The metering pump -V54- for diesel engines has a grey plastic shell and the one for petrol engines has a black plastic shell.
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The fuel shut-off valve -N109- (in the auxiliary heater) prevents the fuel from entering the combustion chamber when the auxiliary heater is switched off. The metering pump -N109- has a bypass hole for releasing pressure in the fuel line between the fuel shut-off valve -V54- and the metering pump -V54-.
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Ensure the genuine part number is correct.
Removing
Note
Observe the safety measures when working on the fuel supply system → Rep. gr.20.
WARNING
Danger of fuel escaping.
Fuel system is under pressure.
Before opening system, wrap a cloth around the connection. Then release pressure by carefully loosening the connection.
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Release quick-release coupling on fuel line -1- and seal fuel line to prevent fuel from leaking.
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Loosen O-type clip -3- and seal fuel line to fuel tank to prevent fuel from leaking.
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Detach bracket -2- for metering pump -V54- on fuel tank using suitable tools.
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Pull metering pump -V54- out in direction of -arrow-.
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Disconnect connector on metering pump -V54-.
Installing
Note
Renew clamp-type clips using screw-type clips.
Ensure the genuine part number is correct.
Install in reverse order.
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Ensure proper installation position of metering pump -V54-.