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MEC 9000H tech ?

Discussion in 'Uncategorized Threads' started by cwh, Dec 25, 2007.

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  1. cwh

    cwh TS Member

    Joined:
    Jan 29, 1998
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    I removed the plug to replace the oil in my pump only to find that it was a pressure release valve. Does anyone know the procedure for returning it to the factory setting of 800 psi?

    I'll call MEC but the pump is not built by MEC.

    Regards,

    CW
     
  2. g7777777

    g7777777 TS Supporters TS Supporters

    Joined:
    Jan 29, 1998
    Messages:
    9,354
    There is no factory per se-- you have a pump and a motor- coupled together

    the oil goes in through the bleeder cap opening-- I dont remember a pressure relief valve -- there is a return valve plug(which isnt used as the pump is set up for the mec)

    Find a local pump place-- they should be able to help you

    regards from Iowa

    Gene
     
  3. Hap MecTweaks

    Hap MecTweaks Well-Known Member

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    Location:
    Mesquite, Nevada
    MEC'S (David Kerns) will answer your questions even though they didn't build the pumps. Hap
     
  4. Texas Ton

    Texas Ton TS Member

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    If you didn't screw with any adjustments (if there are any) and can put the valve back in, it should be set back as it was. MEC has used many different style pumps over the years, the only similar "valve" on mine is just a poppet and spring and nut/cap.

    Only way I know to change the oil, is to turn it upside down and drain it thru the filler/breather hole.
     
  5. cwh

    cwh TS Member

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    Jan 29, 1998
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    The valve is a spring, a ball bearing and a threaded plug. The plug loads the spring. It's the load on the spring that I need to know about.

    Regards,

    CW
     
  6. Texas Ton

    Texas Ton TS Member

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    Unless it is different than every hydraulic system I've worked on, it has no adjustment, just replace it and when you tighten the nut it will seal off. If you just partially tighten that nut, it's gonna leak.

    Does it have an O-ring or fiber washer?
     
  7. newcastle

    newcastle Member

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    Jan 29, 1998
    Messages:
    219
    Location:
    Stillwater MN.
    I'm not sure it matters all that much, I also had mine off and when I reinstalled it I just turned it in a bit on till I liked the way the pump sounded. works just fine now.
     
  8. cwh

    cwh TS Member

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    Jan 29, 1998
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    Texas ton,

    There is a cap with o-ring that goes over the plug that loads the spring.

    CW
     
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