The correct way to install this motor

Discussion in 'Heidelberg Printing Presses' started by ali 120, Mar 3, 2025.

  1. ali 120

    ali 120 Member

    Joined:
    Jan 2023
    Messages:
    85
    Location:
    Egypt
    I am working on a GTO machine
    Is it normal?
    When the intake hose is inserted, the motor becomes hot. When the intake hose is not in place, it does not heat up
    [​IMG]
    [​IMG]
     
    Last edited: Mar 3, 2025
  2. junker1984

    junker1984 Senior Member

    Joined:
    Jan 2010
    Messages:
    1,135
    Location:
    US, Midwest
    Vacuum for delivery slow down wheels? If air flow is considerably restricted, these regenerative pumps will overheat. There could also be obstruction in intake housing. Obviously, if your slow downs are physically shut down, and there’s no relief valve, you wouldn’t have the pump turned on.
     
    Last edited: Mar 3, 2025
  3. Jack liston

    Jack liston Senior Member

    Joined:
    Sep 2019
    Messages:
    319
    Location:
    Connecticut
    Did you change filters? Clean the air ways . Is cooling fan working.?
     
  4. ali 120

    ali 120 Member

    Joined:
    Jan 2023
    Messages:
    85
    Location:
    Egypt
    Yes, the air filters are clean and the air duct is clean
    The cooling fan is working
    The problem is that the motor starts to heat up when the intake hose is placed in the machine
    But when the intake hose is not placed in the motor, there is no heat in the motor
     
  5. ali 120

    ali 120 Member

    Joined:
    Jan 2023
    Messages:
    85
    Location:
    Egypt
    How can I verify what I said?
     
  6. Jack liston

    Jack liston Senior Member

    Joined:
    Sep 2019
    Messages:
    319
    Location:
    Connecticut
    Clean the old spray powder out of the slow down wheels in delivery.the powder will build up in wheels and the hoses in delivery. Making pump struggle
     
    ali 120 likes this.
  7. junker1984

    junker1984 Senior Member

    Joined:
    Jan 2010
    Messages:
    1,135
    Location:
    US, Midwest
    It’s not difficult to verify, Ali. By attaching hose to nipple, and pump heats up, that would mean the air flow is being disrupted. Since the pump does not heat up when free running, there should not be anything wrong with it. Have you opened up the 3 toggles that adjust vacuum to the individual slow down manifolds?
     

  8. Koenig

    Koenig Member

    Joined:
    Jun 2023
    Messages:
    14
    Location:
    GCC
    check following: Normally, the surface temperature can reach upto 70 degree, so it is normal temperature, and as yon can see, there is YELLOW STICKER showing the HOT area at the vaccume pump.
    If the vacuum lines, filters, or ducts are clogged with paper dust, debris, or other contaminants, the motor has to work harder to maintain suction, causing it to overheat.
    - Is the motor also getting HOT, Check the Motor Current with AMpare meter:
    • when the hose is connected, how many ampares?
    • When the hose is not connected, how many ampares?
    • 2- Check the following, The ambient and suction temperatures must be between 5 and 40°C.
    • Ambient or suction temperature is too hot
    • Pressure difference is higher than permitted
    • Cooling air flow is restricted
    [​IMG] [​IMG]
     
Loading...