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Topic: 99' U270 Fuel Leak (Read 1507 times) previous topic - next topic

99' U270 Fuel Leak

Hi all,
I have posted about this before, but I have a bit more info on it now, as well as a picture and a video. First, although fairly experienced mechanically as far as gas engines go (worked briefly in a VW shop way back in the 70's, always have done my own repairs and maintenance on a variety of motorcycles and cars, grew up around the stuff, etc.), I am pretty ignorant about diesels in general and Foretravels in particular! But getting less so as I go from project to project on this 99' U270, so please bear with me as I am likely to sound silly to you Motorheads versed in all things Foretravel (among whom I hope to include myself when I graduate from my online "apprenticeship" through the collected wisdom of the oh so knowledgeble members of this amazing forum!).

Anyway, based on some comments when I previously asked a question about this fuel leak problem, I am thinking that the most likely culprit is the lift pump. Now, admittedly I haven't the first clue where it is and what it looks like, I did see what seems to be the source of the leak (at least, it is the highest elevation which was dripping). The leak varied from quite a lot at first to much less after it was idling for a bit and eventually stopped after I shut down the engine. I am attaching a pic of the device taken from the side with my arms fully extended trying to aim my iPhone. I also took a video from below and posted it on Youtube. I will post the URL to the YouTube video... It is quite short and I speeded up some to make the action more exciting! This device is locate on the curbside of the engine right about where the engine stops and the tranny begins, about a foot or so below the top of the valve cover. What say you, is this the lift pump? Is the only remedy likely to be installing a new one?
Thanks!
Foretravel U270 Fuel Leak - YouTube
Don

Re: 99' U270 Fuel Leak

Reply #1 –
Quote from: acousticart –
I will attempt to use the embed code to see if will play from Youtube within the Forum topic window... otherwise I will just post the URL to the YouTube video.

Don - the forum should handle (auto-embed) the base YouTube URL just fine - no need for the embed code.  Try copy-paste on the video's URL and see if that's all you need to do (otherwise, Steve and I are here waiting to see if y'all need technical assistance  ;) )

Michelle

Re: 99' U270 Fuel Leak

Reply #2 –
Thanks Michelle! That is what I did after trying several different options, and then just gave up and posted the URL, then Voilà! Just my usual overthinking!
Don
Quote from: Steve & Michelle –
Don - the forum should handle (auto-embed) the base YouTube URL just fine - no need for the embed code.  Try copy-paste on the video's URL and see if that's all you need to do (otherwise, Steve and I are here waiting to see if y'all need technical assistance  ;) )

Michelle

Re: 99' U270 Fuel Leak

Reply #3 –
That is the lift pump and depending if it is coming from the pump or a line would determine the exact course of action, should not be hard to replace the pump

Re: 99' U270 Fuel Leak

Reply #4 –
Don,

That's the lift pump, and leaking is not unusual on rigs our age, since the new ULSD is apparently not friendly to the older seal formulation.  I had ours replaced at Cummins about a year ago.

Re: 99' U270 Fuel Leak

Reply #5 –
Thanks,
So lift pump it is... I seem to remember that I saw that being replaced by the PO somewhere in the paperwork. How recent is the widespread use of ULSD? I wonder if the lift pump was replaced after it was in effect. I will have to go though those receipts again. Been meaning to make a spreadsheet for all of the repairs and maintenence.

I will check the connections etc., and assuming they all check out, time to shop around for a replacement pump.
Don

Re: 99' U270 Fuel Leak

Reply #6 –
ULSD is pretty much everywhere and it is a small seal that costs less than a buck that the lack of sulfur causes to dry out. It was an issue a few years ago and we had a rash of people reporting on the forum a leaking lift pump. 

Re: 99' U270 Fuel Leak

Reply #7 –
All engines built after 1/1/07 required ULSD, so it was phased in during 2006.

Re: 99' U270 Fuel Leak

Reply #8 –
Hmm... so is this seal replaceable? A buck sounds sooo much better than $300+! Do you have any links or part numbers, or better yet, a PDF illustrated parts breakdown for these pumps?
Thanks, Don
Quote from: John S –
ULSD is pretty much everywhere and it is a small seal that costs less than a buck that the lack of sulfur causes to dry out. It was an issue a few years ago and we had a rash of people reporting on the forum a leaking lift pump.

Re: 99' U270 Fuel Leak

Reply #9 –
Don,
 I have a 99 U270 also and had mine replaced at cummins about a year ago for around $600.00. I am very mechanical also but because of the location and the pump being an electric one and all. I just let them do it. It was well worth the labor cost for me. Merry Christmas.

Mark

Re: 99' U270 Fuel Leak

Reply #10 –
Don,when the seal fails it has been known to leak into the pump motor and drip fuel out the electrical connection, do yourself a favor and replace the pump. 

Re: 99' U270 Fuel Leak

Reply #11 –
That does sound ominous... I suppose it could lead to pump failure on the road and that would not be good! I will start looking for a source for the part once I verify all the connections are tight...
Don
Quote from: Bill Willett –
Don,when the seal fails it has been known to leak into the pump motor and drip fuel out the electrical connection, do yourself a favor and replace the pump.

Re: 99' U270 Fuel Leak

Reply #12 –
I gather by the remarks on ULSD and seal breakdown I should be ok as this coach for the last 3 yrs has had a fair bit of non-ULSD from mexico go thru the system, so all should be well lubricated. The diesels down here seem to run great and have to take a lot of beating too.
John

Re: 99' U270 Fuel Leak

Reply #13 –
Does a U320/M11 use a lift pump?

Re: 99' U270 Fuel Leak

Reply #14 –
John,

No, there is no lift pump on the M11. 

Re: 99' U270 Fuel Leak

Reply #15 –

acousticart
I just got a quote from a Cummins shop to replace my dripping feed pump on my 1999 U295 with the 350 ISC engine. The price for the pump was not bad, about $ 350.00 but the estimate for labor, after they looked it over and said it was easy to get to, was around 6 hours. Shop charges can run from $90.00 to $113.00 per hour at this shop. They said it probably would not take that long but I am hesitant to give the go ahead with that much leeway in labor.
I hope you do better.

Re: 99' U270 Fuel Leak

Reply #16 –
Donald,
That does seem like a long time for a Cummins shop to do a job they must see pretty regularly. We have a receipt from the PO for around $700 for the lift pump replacement in 2006. Unfortunately, it must have been old stock without the newer seals needed for the ULSD fuel that came out around then and ours needs to be replaced again. I plan on doing it myself while I have the coach raised up to do the bulkhead repairs. I will update this thread when I do it... Not looking forward to it, but to save more than $300 in labor, I am willing to take it on!
Don
Quote from: Roadrunner –
acousticart
I just got a quote from a Cummins shop to replace my dripping feed pump on my 1999 U295 with the 350 ISC engine. The price for the pump was not bad, about $ 350.00 but the estimate for labor, after they looked it over and said it was easy to get to, was around 6 hours. Shop charges can run from $90.00 to $113.00 per hour at this shop. They said it probably would not take that long but I am hesitant to give the go ahead with that much leeway in labor.
I hope you do better.

Re: 99' U270 Fuel Leak

Reply #17 –
Don
You should have very little problem doing the lift pump with the coach raised a little. I come from an old line of mechanics and loved that kind of work but age and too many good meals settled around the waist prevents me from doing it myself. LOL
I wish you luck and am looking forward to your update.

Re: 99' U270 Fuel Leak

Reply #18 –
Just had my lift pump replaced at SE Power in Tampa (Cummins dealer). Parts AND labor was a little over $400.

Re: 99' U270 Fuel Leak

Reply #19 –
I could be mistaken, but the lift pump in the 99's (electronic ISC's), is altogether a different part and even in a different place. If Cummins would replace ours for that, I would be very inclined to take them up on it!
Don
Quote from: Steve & Ginny Hill –
Just had my lift pump replaced at SE Power in Tampa (Cummins dealer). Parts AND labor was a little over $400.