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  1. #1
    Veteran Member
    Join Date
    May 2001
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    2,385
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    Michigan
    Tractor
    New Holland TC40D Supersteer

    Default Do you need to "prime" a new hydraulic cylinder?

    I'm ready to hook up my hydraulic top link. I've read about hydraulic systems having problems with air. If I just hook uo the lines to the top link and start using it, will the air be forced out, or do I have to "prime" the cylinder somehow?

  2. #2
    Super Member
    Join Date
    Apr 2000
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    6,416
    Location
    central New York
    Tractor
    all makes and models

    Default Re: Do you need to "prime" a new hydraulic cylinder?

    No you do not need to prime a cylinder. Just operate the valve full stroke on the cylinder a few times and it should remove all the air for you.

  3. #3
    Veteran Member
    Join Date
    Jan 2002
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    1,561
    Location
    South East Michigan
    Tractor
    New Holland TC30 Hydro 4x4, Gravely Zero Turn Mower

    Default Re: Do you need to "prime" a new hydraulic cylinder?

    Yep, I was surprised to find this to be true myself. Just operate the cylinder and it takes care of itself.

  4. #4
    Veteran Member
    Join Date
    May 2001
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    2,385
    Location
    Michigan
    Tractor
    New Holland TC40D Supersteer

    Default Re: Do you need to "prime" a new hydraulic cylinder?

    Thanks, Art & Jerry.

  5. #5
    Platinum Member
    Join Date
    Oct 2000
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    612
    Location
    Illinois
    Tractor
    Ventrac 4500

    Default Re: Do you need to "prime" a new hydraulic cylinder?

    As others have indicated, you do not need to "prime" a new hydraulic cylinder. However, you do have to replenish the oil in the hydraulic reservoir that the cylinder is drawing from to make up the oil required for the cylinder and its lines.

    Jack

  6. #6
    Veteran Member
    Join Date
    Jan 2002
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    1,569
    Location
    Colorado
    Tractor
    2000 New Holland TC29D with 7308 FEL, and top & tilt. 1950 John Deere B. 1940 Farmall A.

    Default Re: Do you need to "prime" a new hydraulic cylinder?

    I agree with the others about not needing to prime it and JackIL has a good point about adding fluid. Be sure and pick up a couple quarts and top it off after you operate the hydraulic top link a couple times.

  7. #7

    Join Date
    Jul 2001
    Posts
    477
    Location
    Fort Kent, Maine
    Tractor
    B6100D Kubota

    Default Re: Do you need to "prime" a new hydraulic cylinder?

    You don't need to 'prime' it, but it wouldn't hurt to just fill it with fluid first, then cycle it until the rest of the air is purged. Cuts the purging time dramatically, and may result in fewer possible air problems. Just my .02

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