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  1. J

    Aftermarket Diagnostics Tool

    i realize this discussion was 6 yrs ago , current off hiway multi brands is texa, jaltest,
  2. J

    cat 3126b low oil pressure

    sorry you all for not finishing the thread, i replaced the lower oil pump , hot oil pressure came up to 20 psi at idle, 55 psi above 1500 rpm the engine sounded quieter and smoother at idle
  3. J

    cat 3126b low oil pressure

    i did the portapower style test, was fine , removed oil pump and found pickup tube gasket was bad ,also pickup tube was warped, sanded to get a flat surface, plan on reassemble tomorrow and start and see what happens
  4. J

    cat 3126b low oil pressure

    Actually running it with the valve covers off there's hardly any oil flying around the way it acts when it is sitting there idling reminds me like it's getting air into the oil on the pump suction side or something it'll start and run nice as it warms up the oil pressure will start to climb and...
  5. J

    cat 3126b low oil pressure

    I did run the engine with the valve cover off is earlier found that I had a major leak on injector number one with broken o-ring which I replaced I had thought of rigging something like that up but I didn't
  6. J

    cat 3126b low oil pressure

    hi idle 70 psi thanks
  7. J

    cat 3126b low oil pressure

    7as28667 cold idle 55 psi , 60-70 psi i put a shim in oil pump releif , before fully warm it was down to < 5 psi , as oil pressure drops < 10 heui pressure starts cilimbing as high as 3000psi on mech gage, then stalls
  8. J

    cat 3126b low oil pressure

    i am working on a c7500 with cat engine 3126b with heui injection system, oil pressure is fine at startup ,as engine warms up oil pressure drops til engine warning lite comes on, checked with mechanical gage, it matches dash gage,replaced one injector for high oil flow , had broken o ring ...
  9. J

    CAT Telehandler Steering stutter/popping

    i wonder if the machine has limited slip diff, a place i used to work had a cat telehandler that would need a good dose of limited slip additive, on that one the brakes would chatter
  10. J

    Cat/JLG telehandler support website

    i realize this may be alittle late for the original conversation, jlg does give you free access to service manuals, go to main page, parts and service, pdf manuals, they are factory tech grade, enjoy, i prefer to print schematics on the largest printer i can get my hands.
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