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  1. R

    623b Low Engine Horsepower

    One thing I mean’t to mention that this machine has had the muffler removed and a straight pipe fitted.
  2. R

    623b Low Engine Horsepower

    Engine serial no is 70v 2085. Throttle is hitting the stop in the pump. Have resealed fitting into intake manifold found in a bit lose. I’m still waiting on diaphragm and gaskets to do frc.
  3. R

    623b Low Engine Horsepower

    No the pump hasn’t been done have replace the injector nozzles. Serial number is46p651.
  4. R

    623b Low Engine Horsepower

    Does anyone know the factory setting for the spool for the air fuel ratio controlled valve as my cat manual doesn’t say how to set it up.
  5. R

    623b Low Engine Horsepower

    Have had cat mechanic set engine rpm whilst setting Trany shifting pressures. Have checked brakes and wheel bearings. Change fuel filters several times engine doesn’t seem to blow much black smoke and pardon the expression it doesn’t sound very ballsy. When the engine was rebuilt we used fp...
  6. R

    623b Low Engine Horsepower

    I have a 623b 46p651 scraper that seems to be down on horsepower. Have rebuilt engine recently with new head fitted. Also put new injector nozzles. Can anyone help me out at all? Cheers Rick.
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