Fuel line question

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Bigfoot
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Fuel line question

Postby Bigfoot » Wed Nov 22, 2017 9:17 pm

Must preface by saying, that I am not much of a mechanic at all:

The fuel lines on my 451 Massey, where in bad shape. I decided to change them all. Good thing I did, some cracked just moving them with my fingers. Wish I could post a picture. The line running to the lift pump T's, and then runs directly to the line coming from the lift pump. I changed that line, when I changed all the others. Tractor runs fine, but ran good with leaky fuel lines to. Mostly to satisfy my curiosity, why would a line from the input side, bypass the pump, and intersect the output line?
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cfpinz
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Re: Fuel line question

Postby cfpinz » Mon Nov 27, 2017 7:40 am

A picture would be great, as I'm having trouble following you.

Is there a pressure regulator downstream somewhere?
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Re: Fuel line question

Postby dieselbeef » Mon Nov 27, 2017 9:48 am

press return line
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Re: Fuel line question

Postby Bigfoot » Mon Nov 27, 2017 4:21 pm

cfpinz wrote:A picture would be great, as I'm having trouble following you.

Is there a pressure regulator downstream somewhere?


Not that I have seen.
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Re: Fuel line question

Postby Bigfoot » Mon Nov 27, 2017 4:22 pm

dieselbeef wrote:press return line


That sounds plausible. Would all Diesel engines do that?
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Re: Fuel line question

Postby D2Cat » Mon Nov 27, 2017 6:42 pm

There must be a check valve in the line, or it would just bypass around the pump. The return line comes from the injectors, and is fuel the injectors don't use. Return line is low pressure and usually returns to the fuel tank.
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Re: Fuel line question

Postby Bigfoot » Mon Nov 27, 2017 6:59 pm

Thanks for the replies. I hate a Diesel engine with a passion. Even simple minded me can rebuild a carb, and change points.
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Re: Fuel line question

Postby D2Cat » Mon Nov 27, 2017 10:25 pm

Once you figure out how simple a diesel really is you'll change your mind! Fuel, air, compression and no air in the fuel.
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