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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
Fuel problem on 751
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<blockquote data-quote="Tazza" data-source="post: 1163" data-attributes="member: 82"><p>The lift pump will have a rubber/neoprene diaphragm that gets pushed backwards and forwards by a cam that creates pressure/vacuum that pressurizes the fuel much like a car fuel pump does. Air will get into the fuel line through and splits/cracks in the diaphragm, the air will get in from your engines breather, as where the cam pushes a plunger that connects to the diaphragm will not be air tight as the rubber diaphragm *should* make it air tight when it is not damaged. Now, *IF* the diaphragm is damaged and you put an electric fuel pump in line with a damaged fuel pump you will push fuel through the cracks in the diaphragm which will pass through where the plunger goes into the engine or injector. The injector pump will most likley be fed by your engines oil system and any fuel that makes it past the plunger will enter your engines oil. I am not sure if leaving it *patched* with a pump will be a good idea, You will still get diesel entering your engine oil. I think running your injector dry can cause damage, as you will never get all the air out of the lines using that method. Surely you can get a new diaphragm for the pump and install it yourself if you are mechanically minded. Good luck!</p></blockquote><p></p>
[QUOTE="Tazza, post: 1163, member: 82"] The lift pump will have a rubber/neoprene diaphragm that gets pushed backwards and forwards by a cam that creates pressure/vacuum that pressurizes the fuel much like a car fuel pump does. Air will get into the fuel line through and splits/cracks in the diaphragm, the air will get in from your engines breather, as where the cam pushes a plunger that connects to the diaphragm will not be air tight as the rubber diaphragm *should* make it air tight when it is not damaged. Now, *IF* the diaphragm is damaged and you put an electric fuel pump in line with a damaged fuel pump you will push fuel through the cracks in the diaphragm which will pass through where the plunger goes into the engine or injector. The injector pump will most likley be fed by your engines oil system and any fuel that makes it past the plunger will enter your engines oil. I am not sure if leaving it *patched* with a pump will be a good idea, You will still get diesel entering your engine oil. I think running your injector dry can cause damage, as you will never get all the air out of the lines using that method. Surely you can get a new diaphragm for the pump and install it yourself if you are mechanically minded. Good luck! [/QUOTE]
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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
Fuel problem on 751
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