Oil & Fuel Damaged fuel line on MF2410

[Pixguy]

I smelled fuel and noticed a fuel sheen on the driveway today while cleaning off the almost 12" we got overnight. I parked it and saw fuel coating the left side of the engine but saw no leak. I started the engine back up and saw diesel spraying out the fuel line just below the metal clamp leading to the filter. The line appears to be 12-15" long and goes inside the plastic wire covering.

Not a mechanic, I have a few questions.

Is that line easy to replace?
Can I take that off and get replacement line at NAPA or equivalent?
Why would it get a pin hole? Normal?

Thanks

 

[Wagtail]

If the line is clamped at both ends, then it should be easy to remove it. Take it to a NAPA or equivalent shop to have them cut you a length (the specs of the line will be printed, a number of times, on the line).

I would say that a pinhole occurring is normal simply due to vibration stress. Vibration is also why nuts & bolts work their way loose.

It happens. :confused3:

 

[MF RED in MT]

I smelled fuel and noticed a fuel sheen on the driveway today while cleaning off the almost 12" we got overnight. I parked it and saw fuel coating the left side of the engine but saw no leak. I started the engine back up and saw diesel spraying out the fuel line just below the metal clamp leading to the filter. The line appears to be 12-15" long and goes inside the plastic wire covering.

Not a mechanic, I have a few questions.

Is that line easy to replace?
Can I take that off and get replacement line at NAPA or equivalent?
Why would it get a pin hole? Normal?

Thanks

I know this Ghost Thread is about 3 years old, but I'm bringing it back to life, as I believe I have the exact same pin hole fuel leak as Pixguy had.

I was searching thru my repair manual thinking I would replace all of the rubber fuel lines since my tractor is over 10 years old with 660 hours, but it appears MF has lots of short/medium/long hoses...

I think I'll cut/shorten the hose (about 1.5") to remove the pin hole leak and reconnect the hose to the existing for right now to repair the fuel leak so I can finish snowblowing tomorrow.

I would appreciate others to comment about this issue and the repairs that you have made.

The first pic is where I noticed red dyed diesel drippings on the snow, maybe hard to see.

The second pic is similar to Pixguy's pic but shows a tiny stream coming out of the rubber fuel line just above the throttle cable and going to the left while the tractors running.

The third pic is a close up that might be easier to see the red dyed diesel drippings on the snow.

I also believe the pin hole leak is located where the split wire wrap material stops, and MF taped this area with electrical tape.

Thanks, KC

 

[not2old]

I have a GC2610 that had the same problem. I didn't look close enough and bought a piece of hose to replace the wrong piece. I ended up just cutting off a bit and re-installing it on the fitting. That was at least eight months ago, no problems since.

 

[cdaigle430]

You know I am going to take a look at mine now-for several years now and again I see a tiny puddle of diesel right under the same spot. Im going out check the hose out this weekend.

 

[MF RED in MT]

Today I cut about 1.5" off of the fuel line and reconnected it, size maybe metric but looks like 1/4" diameter will work.

The pin hole leak looks like it came from a crack along the hose (another crack is 180 degrees around to the other side).

First pic is of the identification markings along the fuel line.

Second and third pics are of the removed damaged piece of the fuel line, showing cracks (or cuts?) along the hose (the deepest crack is where the leak was).

KC

 

[beargap]

That seems to be a common failure point. I had a similar small leak on my GC2400 right where the fuel hose connects to the fitting and cut off about the same amount and reattached it. I'll have to keep an eye on it as it probably will happen again based on these reports.

=Vic=

 

[MF RED in MT]

It appears from my MF Parts Book that there are 2 rubber hose fuel lines going to the engine.

It seems the one I have a problem with is MF # 4264890M91:

07mm (0.275") I.D. x 12mm (0.472") O.D. x 800mm (31.5") long and it connects to the fuel pump that's located under the floor panel.


The other rubber hose is a MF # 6250349M91:

06mm (0.236") I.D. x 10mm (0.393") O.D. x 1900mm (75") long and it appears to connect to the top of the fuel tank.

I believe I may get a piece of replacement hose and a hose coupler with clamps and replace as much of the line as possible without for now.

After some more research, I discovered the fuel pump is located under the screen in the center of the platform. To access the fuel pump, remove the plastic cowling behind the steering column.

I am in the process of identifying all of the rubber type fuel lines and will try to list the I.D. x O.D. x Length of each hose.

The reason I'm working towards replacement of all of the fuel lines is the original MF fuel lines look more like a thin vacuum hose instead of the normal thicker fuel lines that I'm use to.

KC

 

[Ran 2292]

When I did mine GC2600 I took the floor pan off and the screen under the dash it made it a lot easier to get to. It will need a good cleaning also (grass clippings and mice nest) under there. I wanted to replace it with the correct fuel line metric also, went to Massey, Napa and then Kubota and none of them had it they all said to use the 1/4 inch hose so I did its been on there probably a year and no problems so far I would say mine was a fairly easy job and like yours and the others mine started leaking at the same spot I cut it off and slipped it back on and ran it a few months before I replaced it. I bought the tractor new 2011, at the time I replaced the fuel line I would say 600 hrs.

 

[MF RED in MT]

When I did mine GC2600 I took the floor pan off and the screen under the dash it made it a lot easier to get to. It will need a good cleaning also (grass clippings and mice nest) under there. I wanted to replace it with the correct fuel line metric also, went to Massey, Napa and then Kubota and none of them had it they all said to use the 1/4 inch hose so I did its been on there probably a year and no problems so far I would say mine was a fairly easy job and like yours and the others mine started leaking at the same spot I cut it off and slipped it back on and ran it a few months before I replaced it. I bought the tractor new 2011, at the time I replaced the fuel line I would say 600 hrs.

Yes that would make for great access to also remove the floor panel, but I have a Simms hard sided cab and I did not want to remove the cab in order to remove the floor panel.

What I did was remove the plastic cowling screen under the dash and also the small horizontal screen near the fuel pump which gave me enough access to replace this fuel line from the fuel pump to the engine.

I purchased about 4' of 5/16" I.D. (OEM I.D. was 7mm or 0.275") fuel injection hose with clamps, and 4' of 3/4" split wire loom for the replacement parts.

I installed the new parts as similarly installed by MF, split wire loom around the fuel line hose and electrical taped both ends.

I decided on the 5/16" (0.3125") diameter hose instead of the 1/4" (0.25") hose because the metal tubes that the hose slips over each have a pretty large expanded bell area for the hose.

In the future, I'm going to order and replace only the MF fuel return line parts (#3,4,5,6,7,8) on page 72 shown below as they are located next to the engine and they look like they show wear from heat .

The 3 pages below are from my MF Parts Catalog showing all of the related fuel lines for my tractor with my scribbling's of (mm/inches) inside diameter x outside diameter x length of the fuel related hoses:

View attachment Fuel Line P.72 MF Parts Catalog.pdf View attachment Fuel Line P.96 MF Parts Catalog.pdf View attachment Fuel Line P.100 MF Parts Catalog.pdf

 

[MF RED in MT]

F.Y.I. here are 2 pics.

First pic is the MF OEM fuel line with a pin hole leak, and the second pic is of the replacement fuel line.

Also my wife does not like the smell of my new cologne, "Red dyed Off Road #1 Winter Blend Diesel".

KC

 

[MF RED in MT]

I'm bringing this old thread back to life because it appears a few are having a fuel hose leaking on their GC's.

After fixing my leak from 2 years ago, I have not had any fuel leak problems, purchased most replacement fuel lines from MF (for near the engine) but still have not installed them...

Hope this helps a little,

KC

 

[irvingj]

And in case people didn't see it... My 2310 had a leak in almost the same spot back in 2013 -- a bit lower, however. Interestingly, I couldn't see the damage until I squeezed the line -- then saw the vertical split.

I just cut out that last 2"+ section, spliced in a piece of 1/4" copper tube, re-used a good section of hose to re-connect. It does, however, still weep a bit, so that's not the best fix. I really need to replace that whole line!

PS -- I see, by the pic I just took, it's weeping again....

 

[DJRussell]

J

F.Y.I. here are 2 pics.

First pic is the MF OEM fuel line with a pin hole leak, and the second pic is of the replacement fuel line.

Also my wife does not like the smell of my new cologne, "Red dyed Off Road #1 Winter Blend Diesel".

KC

View attachment 641509 View attachment 641510

MF in RED.

I have a leak in exactly the same spot on my GC2610. I just shortened the line to continue working, but would like to replace the entire line.

Do you remember the length of the line? Does it go back to the tank, or the fuel filter?

Your pictures are great, made it easy to know my leak was exactly the same as yours.

Regards

JR

 

[DJRussell]

MF in RED

I spent a little more time on your attachments and realize now that the line is about 32 inches long and actually goes to the fuel pump, hidden somewhere under the floor panel. I will buy some 1/4 inch line and wait for a nice day to do the replacement.

Once again, thanks for the great pictures and writeup.

JR

 

[MF RED in MT]

Hi DJ, yes it seems this has been a very common fuel line failure in the same location for our GC's.

The "fuel injection" hose is a MF # 4264890M91:

07mm (0.275") I.D. x 12mm (0.472") O.D. x 800mm (31.5") long and it connects to the fuel pump that's located under the floor panel.

I would suggest getting just a little bit more hose.

I disconnected the old fuel hose at the pump and then connected the new hose (with the split wire loom already installed with electrical tape) to the old hose with electrical tape and then fished both hoses together to the engine connection.

Good luck, KC

 

[Dmacleo]

3 lines. tank to pump under left floorboard. pump to filter (which broke on mine-trimmed and resealed pump end) then filter to injection pump.
I got all 3 lines just been putting off replacing them. all are brittle.

 

[Buckeye76]

My fuel line ziptied to the left bottom framerail by MF was cut after I thought I fully attached my MMM PTO... well, it came off and ended up cutting it. Good thing that heavy armor wire wrap was put on to protect it (j/k). As exposed as thr fuel lines are under the mower, you would think... that it would be better protected. I went to my local Ag Supply store and bought a foot of hose and some clamps, cut the line in half where it was cut, slipped the new hose on yo each end of the cut line, and clamped it on snug. Done deal.

Now to figure out how to put a keyed PTO shaft, onto a non-keyed shaft. This was how I got it new on my 2326 MMM. Pic for ref after some persuasion to get them together. Dealer couldnt grasp that one side was keyed, and the other side wasnt... making it near impossible without damage to get them together. I think I will have to spring for a new half after I figure out if they installed the right shafts together. Do any of you have the same MMM? Is one side of your shaft not keyed (attaches to MMM) and the other half keyed (attaches to tractor PTO)?

 

[Dmacleo]

the 2326 MMM is keyed on shaft itself. it is NOT keyed on hookup to MMM pto output on a GC series
but the damned thing feels like it is sometimes. damn thing likes to screw with you I swear....

 

[Dmacleo]

it REALLY feels like its keyed when the slip collar had something fall on it preventing the lock from sliding backwards all the way preventing fully sliding onto shaft all the way. one ball would not release enough to slide fully onto pro output