L4701 fuel line specs and replacement?

   / L4701 fuel line specs and replacement? #1  

hillbilly0310

New member
Joined
Oct 28, 2017
Messages
7
Location
Highpoint, MS
Tractor
to be determined!
Hey folks, I've got a 2017 Kubota L4701 with 650 hours on it that has sprung a leak in a fuel line running from the filter to the engine (see pic). For the short and sweet, I'm wanting to know if you can tell me what exactly this line would be called at the parts counter, and what special precautions, if any, do I need to take (e.g., air in the system, etc.) Also, if they don't have the entire line with crimped ends, is it acceptable/possible to splice it? Finally, could you spare me a quick run down of the process, and especially any thing that I want to definitely NOT do, if any exist? Or is it just as simple as take the old off, ensure cleanliness, and put the new on? I'm OCD as it is, and I hate not knowing details about even a minor repair before I do it, but as you all know, this time of the year is 90-to-nothin' and time for extracurricular activity is limited! (Time ain't any good if the repair leads to failure though!)

That's the meat of my post, but for the au jus lovers asking how and why, unbeknownst to my helper, the plastic, perforated side cowling came out of a detent and within a few hours the rattling/rubbing on the fuel line caused it to spring a leak. (We managed to put some fuel tank epoxy on it in order to limp it to the trailer without making an even bigger mess, and so that's what the white glob is.)

It's a good little clip to get to my dealership, and before I call to make sure they have it in stock (Not taking any chances!), I wanted to ask the experts on what exactly is this section of line called? I've had it happen before where the parts counter thought I meant one thing, but it was actually something else and I left going home empty handed. To be fair though, it has happened with more complicated, possibly redundant items, but still, it sucks to drive 45 min one way for nothing.

Most importantly, if they don't have it, I'll have to go to plan b, c, etc., and I want to get the details and specs on it so if I go searching far and wide I get the right item. Gotta love living in the middle of nowhere!

I appreciate any help you can afford me!
20190630_161800.jpg
 

Attachments

  • 20190630_161618.jpg
    20190630_161618.jpg
    4.6 MB · Views: 185
   / L4701 fuel line specs and replacement? #2  
Cut it at the leak and install a clear plastic fuel filter .
 
   / L4701 fuel line specs and replacement? #3  
Looking on Messicks for Kubota L4701DT Parts Diagrams - part diagram A11100 FUEL PIPE (FUEL PUMP/FUEL COOLER) the filter inlet hose is: HOSE,FUEL - HOSE,ASSY(FUEL,1) p/n TC630-42670 and the outlet hose is: ASSY HOSE 2,FUEL - ASSY HOSE,FUEL p/n TC650-42680. Both have a 5 to 7 day lead time. i would also get 4 of the seal washers: GASKET - GASKET(PIPE,JOINT) 1J800-43650, they have 6 in stock.

Bill
 
   / L4701 fuel line specs and replacement? #4  
Cut it at the leak and install a clear plastic fuel filter .


I do not think this is a good idea. The L4701 is a common rail fuel injected engine. Unlike older diesels, the fuel system is running at up to 10,000 psi. Injectors are fired electronically.

Seeing the banjo fitting on the leaking hose with a crimped end makes me think this line could be running at the common rail pressure.

There are two pumps on the engine, a feed pump and a supply pump. Unless you are certain where the leak is in the system, a home made solution is not wise.

Using original parts would be the route to avoid personal injury or a fire.

Dave M7040
 

Tractor & Equipment Auctions

2019 INTERNATIONAL 4300 26FT BOX TRUCK (A43004)
2019 INTERNATIONAL...
3pt Ditcher (A44502)
3pt Ditcher (A44502)
2012 KENWORTH T800 MID-ROOF SLEEPER (A45333)
2012 KENWORTH T800...
2012 AMERITRAIL, INC. T/A 32’ GOOSENECK (A45046)
2012 AMERITRAIL...
2006 INTERNATIONAL 9200i SLEEPER (A43004)
2006 INTERNATIONAL...
2020 PETERBILT 567 (A45046)
2020 PETERBILT 567...
 
Top