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Topic: Fass fuel filter system (Read 1734 times) previous topic - next topic

Fass fuel filter system

I just ordered a TS 165 gal per minute fuel system. I missed the one they had in
stock by one day. I haven't made up my mine where I'm going to put it yet. I could
put in the storage compartment by the Aqua-hot or where the Winns fuel filter is.

Re: Fass fuel filter system

Reply #2 –
No that's the one for the M11

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Reply #3 –
Did you say 165 gal per hour 😎

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Reply #4 –
Yes,165 gal and hour. Now not all the fuel goes to the engine. A lot of the fuel goes
back to the tank all cleaned up.

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Reply #5 –
Understand there will be two fuel return lines. The original fuel return from the engine and a additional 3/8 line to return fuel line from the FASS with removed air back to the tank. This relieves all vacuum draw issues and prevents any possibility of air being drawn in. I would prefer to see the FASS system as close as possible to the tank. All excess fuel is returned to the tank going thru the ECM chilling plate then routed to the fuel cooler outside of the radiator and returned to the fuel tank.
Scott

Re: Fass fuel filter system

Reply #6 –
I believe the return line is 1/2 inch. I will learn more when I go and pick it up.
I talk to the tech at Fass and he said TS165 could suck the fuel around 22 ft.
which is about how far to the Winn filters but the pump pushes a lot better.
If it works I leaning towards putting the Fass system beside the Aqua-hot.

Re: Fass fuel filter system

Reply #7 –
Peter, you might want to keep the fuel system over open areas. I can't imagine what would happen if a leak developed in the Fass system in one of the bays. The fuel odor would last a long time not to mention the possibility of dissolving insulation in the floor. If you could make a catch container with an exit under the coach then it would be better.

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Reply #8 –
I think the FASS System is overkill, similar using  a nuclear hand grenade when a good rock would do.

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Reply #9 –
Quote from: TGordon –
I think the FASS System is overkill, similar using  a nuclear hand grenade when a good rock would do.
So with similar costs I'm still looking for the downside. Any air intrapment will reduce pump performance and this i illuminates any possible air leaks. Time will tell

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Reply #10 –
I'm thinking of adding a lift pump, but like crane man I have reservations about pressuring the fuel lines through the bays. I have 5/8 fuel line any pump worth its salt should be able to pull fuel that far. After all the caps pump manages to do it.

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Reply #11 –
This is why I put out the 2 different places to put the pump. The place by the
Aqua-hot I have to be so careful not to spill any fuel while changing the filters
or anything else that could happen. At least I have a week to think about it.
I appreciate all the feed back.

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Reply #12 –
Foretravel Tech Talk

Here is a link to the fass install by Don a while back. He used the 95 gallon one and he seems to be happy with it
Johnh
Oops that did not work. Search Fass fuel pump install to see comment
Don's comment.--------
I am buying the FASS UP95 unit from UltraRV products. It costs more than Summit Racing, but the guy who packages the FASS pump modifies the harness that comes with it so that the Cummins ECM doesn't know the Electronic lift pump isn't connected anymore. He claims he has done this for many Cummins CAPS equipped RV's with good results. This method bypasses and plugs the fuel inlet and outlet on the supply side of the OEM lift pump. The OEM electronic lift pump has an integral manifold that takes the unburned return fuel after it cools the CAPS Assy., the engine's ECM, and feeds the injectors. The OEM pump stay's mounted in place on the side of block and the return lines stay as before. He also told me that a not uncommon problem with the CAPS equipped coaches is tha the lift pump seals can develop an internal leak that lets air into the system. The Cummins price on the OEM Electronic lift pumps are more than half the cost of the heavy duty FASS pump and are a royal PITA to install. I regret that I misplaced the one I took out that failed when it started leaking diesel, because I would like to dissect it. I may yet find it in storage somewhere, but not in time to do me any good now... Anyway, I am going to order my pump on Monday, and probably have it by Wednesday. Perhaps between us we can add to the knowledge base on the forum. I intend to document the project as well as I can. I look forward to hearing about your results.
Don

Re: Fass fuel filter system

Reply #13 –
Thanks John, didn't think about any issues with the ECM something more to think
about. I have a bigger engine than Don and I'm using the filters.

Re: Fass fuel filter system

Reply #14 –
Seems prudent to me to put this new pump somewhere where the possibility of a leak or a spill while changing filters would be less of a problem.  I wouldn't want any spills of leaks inside of a bay.

What does one of these for the ISM11 cost? Plus fuel lines and installation.

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Reply #15 –
$829 Canadian and I think everything is included except an odd fitting and I will
buy 23 ft of 1/2 inch fuel line as they only include 16 ft. Installation is free as I don't
charge for my labour. I am now leaning more to putting in where the Winn filter is.

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Reply #17 –
Well I'm getting ready for when the Fass arrives. Yesterday I fished a heavy string
to pull the hose through from the tank to the where the Fass will be install. In the
last picture I have the string tied fill neck. All the pictures is show how the return
line will go into the tank. I welded a piece of 3/8 aluminum plate on the side of the
tank and drilled and tap so I could put on 3/4 pipe elbow and I soldered 1/2 pipe
so the return is above the fuel.

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Reply #18 –
Nice job 👍.

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Reply #19 –
I was lucky, the horizontal door bar just cleared the elbow. Pulled the return hose
in place today. It wasn't easy. It took a hard pull and pushing hoses out of the way.
The way I tied the pull string work well. I tied a big loop so the string would pull the
hose through square and then taped it tight. That worked well and I could really
yard on the heavy string. I would have been a lot easier to put it near the Aqua-hot.