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  1. #1

    Join Date
    May 2002
    Posts
    1,064
    Tractor
    Yanmar 1500D

    Default Bleeding Fuel Systems

    There has been some discussion about bleeding fuel systems after running out of fuel but I have seen no mention of the number one most important tool for that purpose....a tubing wrench.

    For those who have never done it before, the tubing wrench is designed specifically for the nuts on the ends of fuel and brake lines. It is designed to make maximum contact with the flats of the nut to prevent rounding off that thin walled nut. An open end wrench doesn't make good enough contact with the flats of the nut and will round them off. Then you'll end up using vise-grips to get them off.

    Get one the correct size for the nuts on your fuel lines and throw it in the tractor mounted tool box. That is where you will need it to be when you run out of fuel in the field.

  2. #2

    Join Date
    Jun 2002
    Posts
    578
    Location
    Beach City, TX
    Tractor
    NH TC33D

    Default Re: Bleeding Fuel Systems

    Thanks for the good tip, Ozarker. I didn't know that.

  3. #3
    Elite Member hazmat's Avatar
    Join Date
    Feb 2002
    Posts
    4,028
    Location
    West Newbury, MA & Harrison, ME
    Tractor
    Kubota L5460HSTC

    Default Re: Bleeding Fuel Systems

    Also known as a flare nut wrench.

    Link at <A target="_blank" HREF=http://www.sears.com/sr/product/summary/productsummary.jsp?BV_SessionID=@@@@1221778795.102 8576108@@@@&amp;BV_EngineID=ccieadcflgiedmgcehgcem gdffmdfin.0&amp;vertical=SEARS&amp;bidsite=&amp;pi d=00942013000> Sears </A>

  4. #4
    Epic Contributor RoyJackson's Avatar
    Join Date
    Nov 2001
    Posts
    20,807
    Location
    Bethel, Vermont
    Tractor
    John Deere 4520 MFWD, Deere 855D UTV, Z920A Zero Turn Mower and assorted implements

    Default Re: Bleeding Fuel Systems

    I don't know about your tractors, but the Deere manuals are pretty specific about not bleeding the system. The injection pump is self bleeding.

    I've bleed diesel systems when I replaced fuel filters on the old GM 6.2 liter truck engines, but there was a procedure for that.

    Self bleeding systems shouldn't be touched, IMHO.

  5. #5

    Join Date
    May 2002
    Posts
    1,064
    Tractor
    Yanmar 1500D

    Default Re: Bleeding Fuel Systems

    You're absolutely correct. If your manual says not to bleed out to the injectors then you shouldn't do so. My Yanmar manual says to bleed to the injectors if it is run dry.

  6. #6
    Elite Member
    Join Date
    Mar 2002
    Posts
    3,841

    Default Re: Bleeding Fuel Systems

    Yanmars are not that sophisticated and have to be bled. They also have a procedure for it.

  7. #7
    Super Member
    Join Date
    Dec 2000
    Posts
    6,737
    Tractor
    JD 8320 MFWD, JD 6415 MFWD, FEL, and cab, John Deere MFWD 4600, John Deere 4020, John Deere 4430, John Deere 455 mower, Deutz, and Gehl 4610 perkins skidsteer

    Default Re: Bleeding Fuel Systems

    They certainly are self-bleeding Norm. Some of the older ones may not be, heck none of them used to be, but the newer ones on all the lawnmowers and tractors are self bleeding.

    Also I've never used one of the special wrenches for bleeding and have never stripped the head off. I'm not saying it's not a good idea by any means. It surely is. If there's a tool for it then if you want to buy it that is the best way to go. I'm just saying if you don't have it just be careful and don't twist so hard that you strip it off.

  8. #8

    Join Date
    Apr 2002
    Posts
    280
    Location
    Rindge, NH
    Tractor
    Kubota L48 (Ellie Mae)

    Default Re: Bleeding Fuel Systems

    I'm planning on changing the fuel filter on my L48 this weekend as part of the 400 hour service. Am I going to need to bleed the system.

  9. #9
    Epic Contributor RoyJackson's Avatar
    Join Date
    Nov 2001
    Posts
    20,807
    Location
    Bethel, Vermont
    Tractor
    John Deere 4520 MFWD, Deere 855D UTV, Z920A Zero Turn Mower and assorted implements

    Default Re: Bleeding Fuel Systems

    "I'm planning on changing the fuel filter on my L48 this weekend as part of the 400 hour service. Am I going to need to bleed the system."

    What does your Operator Manual say?



  10. #10

    Join Date
    Jun 2002
    Posts
    232
    Location
    NE Texas
    Tractor
    Kubota L35 TLB, John Deere 550 dozer, Cat D-2 dozer, Allis Chalmers HD-11 dozer

    Default Re: Bleeding Fuel Systems

    Hi David

    Not if your L48 is like my L35. I just did the same thing (400 hr service) this weekend. The fuel filter was in a small clear plastic cannister. There is a shut off valve above, but I found that some fuel flowed out of the housing even with the valve turned to the off position. I just hurried and switched out the paper filter element while the fuel dribbled. Made a mess, but after finishing the service, the tractor started first hit of the key.

    HTH
    Dave Perry aka karmakanic

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