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Thread: JCB 801.4 engine stalls

  1. #1
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    JCB 801.4 engine stalls

    My 801.4 when warm stalls when any load is put on whether tracking or bucket etc, immediately restarts but wonít tick over and dies again.
    I replaced the fuel filter and fuel pump recently and also fitted a primer bladder all jcb parts, if I let it cool down it is fine for about 5 minutes work then stalling again.
    There is no sign of overheating, I donít know what to explore now as a fix, any suggestions welcome
    Michael

  2. #2
    Admin Muz's Avatar
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    Most likely be a fuel restriction somewhere, commonly something in the tank, or paint flakes in a banjo connector ... something like that
    Please don't PM me for plant advice.. thanks .. Post in the forum where I will gladly help, as will many of our contributors.. as the info and responses will help everyone else, which is why we exist

  3. #3
    Fabrication Guru +1 v8druid's Avatar
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    Quote Originally Posted by Muz View Post
    Most likely be a fuel restriction somewhere, commonly something in the tank, or paint flakes in a banjo connector ... something like that
    Think I'd have the priming bladder out for starters too ..... way I read that it, didn't have one originally??
    valves in those things can be finnicky

    jury rig a gallon can above the motor straight in and see what it does ... then work back
    If it's got tracks, wheels, t*ts, or an engine, at some point it's gonna give you trouble!!

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    Thanks guys

    Quote Originally Posted by v8druid View Post
    Think I'd have the priming bladder out for starters too ..... way I read that it, didn't have one originally??
    valves in those things can be finnicky

    jury rig a gallon can above the motor straight in and see what it does ... then work back
    I only put the bladder on because JCB donít supply the original type pump with the primer leaver and they said this was the current option so if I remove it I have no way to prime the fuel line unless someone has a method they can share?

    i think you are both on the right track as it didnít do it before I changed the pump etc

  5. #5
    Fabrication Guru +1 v8druid's Avatar
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    Quote Originally Posted by Malvern Michael View Post
    I only put the bladder on because JCB donít supply the original type pump with the primer leaver and they said this was the current option so if I remove it I have no way to prime the fuel line unless someone has a method they can share?

    i think you are both on the right track as it didnít do it before I changed the pump etc
    perhaps the arm is too short or the wrong shape and barely pumping, if it's a block mounted, cam driven jobbie

    If it's got tracks, wheels, t*ts, or an engine, at some point it's gonna give you trouble!!

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    Hi, I bought it from a JCB agent with the serial number of my machine so I would hope it is the correct one 🤞🏻
    Michael
    Quote Originally Posted by v8druid View Post
    perhaps the arm is too short or the wrong shape and barely pumping, if it's a block mounted, cam driven jobbie


  7. #7
    Fabrication Guru +1 v8druid's Avatar
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    Quote Originally Posted by Malvern Michael View Post
    Hi, I bought it from a JCB agent with the serial number of my machine so I would hope it is the correct one ����
    Michael
    well you can but hope , but we are talking Jake 'stealer'/agent here ...... do you have the original to compare it with ??
    as your issues all stem from the pump change, I'd be pinning a few quid on it being the issue
    If it's got tracks, wheels, t*ts, or an engine, at some point it's gonna give you trouble!!

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