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Recent content by lightbulb22uk

  1. lightbulb22uk

    Hydraulic Motor Overheating

    Oldhydroman, Reference the following point: "This case drain oil came from your 300 bar supply so will be warm because it will have reduced its pressure to 0 bar by passing through the clearances in the motor. Assume a temperature rise of 6.8 deg C per 100 bar which means your case drain oil...
  2. lightbulb22uk

    Hydraulic Motor Overheating

    LittleInch, Oldhydroman, thanks for the responses. I have had the following presented to me by a colleague, however I am not entirely bought into this as a solution just yet: Motor Power = 174kW Motor Flow Rate = 408 l/min Heat generated through volumetric inefficiency = approximately 4% of...
  3. lightbulb22uk

    Hydraulic Motor Overheating

    All, Thanks again for your responses. Robert, Temperature is currently being measured on the physical motor case and at the drain port, both using an infrared temperature gun. Oldhydroman, I have received efficiency graphs from Parker for the 250 size motor, I have however been unable to...
  4. lightbulb22uk

    Hydraulic Motor Overheating

    Robert, Thanks for the reply. The motor manufacturer is Parker and it is a F12-250 frame size motor. See below link for product literature, see page 67 for information detailing a recomendation for case flushing above 1800 RPM...
  5. lightbulb22uk

    Hydraulic Motor Overheating

    Thanks for the response Hydroman, In addition to the motor are: 2 pumps and a purge valve in the working circuit, a cooler supplied by the purge valve and the pump case drains and a reservoir and header tank. The case drain from the motor returns direct to the reservoir tank. The working oil...
  6. lightbulb22uk

    Hydraulic Motor Overheating

    Dear All, I am currently experiencing overheating of a hydraulic motor casing in a closed loop hydraulic system. The motor reaches around 100 degC in approximately 15 minutes when working at designed maximum speed and pressure (1600RPM and 300 BAR). The increase in temperature shows no sign of...
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