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  1. #1

    Default Hard Start/No Start Issue

    1985 JCB 1550 backhoe w/ perkins 4.236 turbo diesel. Recently having hard start and no start issues. First thing in the morning a few days ago motor would almost start and then just keep turning over. When i finally get it started no smoke or loss of power obvious. Even after it is warm some times will crank right up and sometimes it doesnt. This morning no start at all. No puffs of smoke while attempting to start. Fuel tank cleaned. Lift pump cleaned, filter 2.5 hours old (getting new one anyway). I have pulled all the lines off, pulled filter off. Blew air through every line waiting for two new seals for the lines into the injection pump. machine runs good when it runs but I cannot get it started. What the heck is going on??

  2. #2
    Elite Member
    Join Date
    Jul 2006
    Posts
    4,409
    Location
    Northwest, WA

    Default Re: Hard Start/No Start Issue

    What is your 'on/off' mechanism ?

    Electronic or manual ?
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  3. #3
    Elite Member DieselPower's Avatar
    Join Date
    Sep 2006
    Posts
    2,761
    Location
    Fairfield, PA
    Tractor
    JD 3020, JD 4230, JD 7410, JD 2440, MF 750, NH LS170

    Default Re: Hard Start/No Start Issue

    If your not getting any smoke when you are doing the extended cranking then your not getting any fuel. You could possibly have a leak in the suction side of the fuel system. Not hard to find with a fuel sight glass installed in the suction side. Like Willl said, electronic or manual shut off system? Since diesels do not have a ignition system like a gas engine they are shut off by turning off fuel to the engine. If it's manual make sure the linckage is getting full travel, if it's electrical make sure the solenoid is working properly.

  4. #4
    Platinum Member nspec's Avatar
    Join Date
    Dec 2007
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    602
    Location
    Southern Rhode Island
    Tractor
    Kubota B2630, '53 Farmall Super H, '47 Farmall AI, '44 Farmall A

    Default Re: Hard Start/No Start Issue

    Is it possible your fuel system is becoming airbound when it sits? I had an old gm 6-71 years ago with this issue. I put a check valve on the fuel supply line to the pump and problem solved.

  5. #5

    Default Re: Hard Start/No Start Issue

    It is a manual stop. I have made sure it is off while starting. It is a Lucas/CAV DPA pump. An "in" line and an "0ut" line and 4 lines to the injectors. Only sight glass is at the bottom of my fuel filter. Nothing obvious regarding air there.

  6. #6
    Platinum Member
    Join Date
    Apr 2009
    Posts
    511
    Location
    Western Wyoming

    Default Re: Hard Start/No Start Issue

    ou said you cleaned the tank, does your fuel line have a shut off that may not have been opened again? Just pulling at a string there. The next thing is you might have more than one fuel filter. An air lock might also be the issue. If you have a manual pump, have a buddy run the manual pump while you crack open the fuel lines on the injectors a little bit until you get "air free" fuel coming out. A little air in the fuel is ok, but you gotta have fuel in there. If your injectors are in your valve cover, then crack open the ones on the injector pump itself and bleed them there. That should get some fuel to your engine. Good luck!!

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