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Thread: Netstal HP1500/870 1990pd - Overheating!

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  1. 3rd May 2021, 05:22 PM #1
    Pilot
    Pilot is offline Senior Member
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    Nov 2012
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    Re: Netstal HP1500/870 1990pd - Overheating!

    hi,
    it looks, that you have a issue with one hydraulic valve in the circuit.
    please check the valves with IR camera if is possible.
    You have a oil heat up on it.
    Valve is not fully closed.
    It can be also on hydraulic pump.
    Please check also all filters (suction, hi pressure, oil filter).
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  2. 4th May 2021, 11:40 AM #2
    Fedorchuk Dmytro
    Fedorchuk Dmytro is offline Junior Member
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    Re: Netstal HP1500/870 1990pd - Overheating!

    If i hear hissing in the valve does it mean something?
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  3. 5th May 2021, 12:37 AM #3
    Pilot
    Pilot is offline Senior Member
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    159

    Re: Netstal HP1500/870 1990pd - Overheating!

    yes, if the machine is not moving, the hissing means oil leakage through valve. the oil is under pressure and it generete the heat (shear in the liquid)
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