Cummins Marine Diesel Repower Specialists › Forums › Marine Transmissions › ZF/ Hurth Model # – HSW 800 A2 ** Pressure hiss when checking gear oil

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  • July 18, 2022 at 7:56 am #134357

    ashrun4fun
    Participant

    Twin Cummins – 6BTA 5.9 M3 with ZF/Hurth gear boxes.  One of them has pressure present when I unscrew the dipstick – it hisses for a moment.  The other does not.  This happens both when engines have been running and when they are cold.  Anything to be concerned about??

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  • July 18, 2022 at 6:06 pm #134396

    Tony Athens
    Moderator
    Vessel Name: Local Banks
    Engines: QSB 6.7 550 HP
    Location: Oxnard, CA
    Country: USA

    100% normal for either.

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