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Old 01-11-2019, 01:39 PM   #1
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Quick Disconnects for diesel

Does anyone know if they make QD's for diesel fuel? This will not be a pressure line. My homemade manual fuel transfer/polish system uses an open end hose to transfer fuel to any of my tanks manually thru the fills. I would like to be able to disconnect the hose after the transfer,drain the fuel and roll it up to store it. It doesn't roll up nice when still connected to transfer pump. I know it would be better to plumb it to every tank but this system works ok for us. The hose is about 10' long and I can never get all the fuel out of it plus I would like to store it in a different area seperate from the pump.
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Old 01-11-2019, 01:58 PM   #2
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I don't know why you couldn't use quick connect hydraulic fittings. They seal tight on both ends when disconnected.
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Old 01-11-2019, 02:06 PM   #3
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The only concern I would have about using hydraulic or gas outboard quick disconnects is that many fuel systems are under vacuum while the engine is running. Either make sure that they will hold a vacuum when disconnected or put an appropriate male/female fitting on the fuel system end with a plug or cap that will assure no air gets sucked in.


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Old 01-11-2019, 02:36 PM   #4
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The only concern I would have about using hydraulic or gas outboard quick disconnects is that many fuel systems are under vacuum while the engine is running. Either make sure that they will hold a vacuum when disconnected or put an appropriate male/female fitting on the fuel system end with a plug or cap that will assure no air gets sucked in.


David
All I’m using right now is a tapered wooden plug in the loose end of hose. All tanks have shut valves before fuel transfer system .
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Old 01-11-2019, 02:43 PM   #5
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I don't know why you couldn't use quick connect hydraulic fittings. They seal tight on both ends when disconnected.
I wasn’t sure if the diesel would attack the seals in QD.
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Old 01-11-2019, 02:58 PM   #6
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Hydraulic quick disconnects are offered with a variety of seal materials. Buna which is the most common material for orings is compatible with diesel. Any decent hydraulic shop should be able to look up the seal material of the disconnect they are selling you. Hydraulic oil is probably close enough to diesel that it wouldn't be an issue anyway. They probably have a low pressure solution that is less expensive.

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Old 01-11-2019, 03:59 PM   #7
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Thanks I’ll check with our local hydraulic shop .
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Old 01-11-2019, 08:19 PM   #8
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My biggest concern if anyone else cares, ABYC fuel system requirements are quite stringent.

Not very flexible for valves, drains, bleed ports, connectors, etc, etc....

Even Seabord Marines squeeze bulb setup I dont think meets ABYC the way I read it...but it is long and coex.
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Old 01-11-2019, 08:50 PM   #9
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My biggest concern if anyone else cares, ABYC fuel system requirements are quite stringent.

Not very flexible for valves, drains, bleed ports, connectors, etc, etc....

Even Seabord Marines squeeze bulb setup I dont think meets ABYC the way I read it...but it is long and coex.
Thanks I need to look into requirements. I’m sure my fuel system could use some overhaul.
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Old 01-17-2019, 12:25 PM   #10
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A valve between the quick connect and the fill point would solve any vacuum questions if you have room. It would also lessen the possibility of a quick connect weeping fuel.
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Old 01-17-2019, 01:10 PM   #11
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A valve between the quick connect and the fill point would solve any vacuum questions if you have room. It would also lessen the possibility of a quick connect weeping fuel.
Thanks I like that idea .
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Old 01-18-2019, 08:22 AM   #12
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WE have used QD to pump out oil from our 6-71 at change time.

A rotary hand crank does short work of removing 8 gallons into old 5 gal pails for disposal.

No sign of air in the old oil .No drips , no leaks seen.

Fitted QD caps are made that protect the engine and pump hoses when not in use.
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