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Farmall & IHC Tractors Discussion Forum
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Fuel Return Pipe Union in Fuel Tank (370676R93)

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Prairieplow07

07-27-2019 10:29:24




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I have a 560 Diesel that I am in the process of restoring. I had the fuel tank off and noticed my diesel return line union does not have what I think is a check valve on top. I only have the elbow that threads into the tank. I googled the part number and found a union for $213.00 - WOW!.

Does that union contain a check valve? If so, has anyone ever replaced the union with something else? Is the check needed?

Thanks.

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Bob

07-27-2019 10:36:55




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 Re: Fuel Return Pipe Union in Fuel Tank (370676R93) in reply to Prairieplow07, 07-27-2019 10:29:24  
I believe this has been covered here before... the check valve prevents fuel from running out of the fuel return system (with a full tank) if a connection fails or is disconnected in the injection pump/engine area.

The supply line has a petcock, so that side can be shut off for maintenance/pump removal, but without the check valve the return system will backflow if a connection is opened

If you understand that/accept the risks of it, you can eliminate the checkvalve, it has no effect on the running of the engine.

You could even install a small manual valve, but be sure it has been opened before trying to start the engine,.

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