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Davits

Discussion in 'Technical Discussion' started by DOCKMASTER, May 5, 2021.

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  1. DOCKMASTER, May 11, 2021
    #21
    DOCKMASTER

    DOCKMASTER Senior Member

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    Looks like I may have gotten lucky. We put some weight on the end of the cable and ran the davit up and down. It seemed to operate better with each cycle. Our thoughts are that the hydraulic cylinder and seals got dry sitting for so long. We will keep testing but so far looks like it is OK. I guess I need to run this thing a bit on a regular basis.
    TahoeJohn likes this.
  2. NYCAP123, May 11, 2021
    #22
    NYCAP123

    NYCAP123 Senior Member

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    Definitely run it out and check the cable. If it kinked or jammed you could have a weak point.
  3. MBevins, May 11, 2021
    #23
    MBevins

    MBevins Senior Member

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    Definitely swap the cable for dyneema.!
  4. Danvilletim, May 11, 2021
    #24
    Danvilletim

    Danvilletim Senior Member

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    How hard is swapping?
  5. Capt Ralph, May 11, 2021
    #25
    Capt Ralph

    Capt Ralph Senior Member

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    This depends where the fixed end is.
    Sometimes you can reach it easily, sometimes not so easy.

    Then, cutting your hook off, and taping the old/cut end to the block end of the new line, it just pulls thru, up and down the cylinder a few times to the fastening block.

    I also preferred a factory Dyneema splice than in the field.
    Marquipt may offer a ready made line / kit. I would go here with ready made eye splices.
    Last edited: May 11, 2021
    TahoeJohn and MBevins like this.
  6. DOCKMASTER, May 15, 2021
    #26
    DOCKMASTER

    DOCKMASTER Senior Member

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    So we are trying to verify hydraulic fluid level and we cannot find a dipstick or sight level anywhere on this thing. Actually, we can’t even find anything that looks like a reservoir. There is no model # anywhere that we can find. We took some pictures and sent to Marquipt to try to identify and get a manual.
    Are the reservoirs typically remote mounted? It might be behind the closet where the stand pipe comes down and we will look there next. You wouldn’t think it wouldn’t be that hard to locate and check fluid level!
  7. motoryachtlover, May 15, 2021
    #27
    motoryachtlover

    motoryachtlover Senior Member

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    My reservoir and the hydraulic manifold is in the closet close to where the standpipe comes down. You probably know this but my davit is very specific about what hydraulic fluid it uses. Apparently you can mess things up with the wrong hydraulic fluid.
  8. Pascal, May 15, 2021
    #28
    Pascal

    Pascal Senior Member

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    Don’t know about the Marquipt. The nautical structure and QuickLift pumps I ve dealt with all had a filler cap at the top of the pump.
  9. DOCKMASTER, May 15, 2021
    #29
    DOCKMASTER

    DOCKMASTER Senior Member

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    Anyone else out there with a Marquipt? Anyone have a Marquipt manual?
  10. Capt Ralph, May 16, 2021
    #30
    Capt Ralph

    Capt Ralph Senior Member

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    The fluid tank can not be far from the pump. Usually one assembly.
    Don't let a small assembly or reservoir throw you off. In a linear drive system, the fluid is moved from one end of the cylinder to the other end, not much has to be stored with the pump.
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