Page 6 of 8 FirstFirst ... 2345678 LastLast
Results 51 to 60 of 73

Thread: Stern Gland

  1. #51
    Join Date
    Apr 2018
    Location
    Mooring, Faro
    Posts
    1,846

    Default Re: Stern Gland

    Quote Originally Posted by pvb View Post
    Volvo-type seals (Volvo, Orbitrade, Radice) don't fail catastrophically, they start by weeping slightly, giving adequate time to get them fixed.
    But there's the hassle of the work and the cost of a new seal plus haul out and yard fees, as happened to Heckler a month or so ago as well as another guy I met in the same yard this year. Fortunately, they were both capable of doing the work themselves so no labour charges.

  2. #52
    Join Date
    Feb 2006
    Location
    N Kent Coast
    Posts
    4,181

    Default Re: Stern Gland

    Quote Originally Posted by Graham376 View Post
    But there's the hassle of the work and the cost of a new seal plus haul out and yard fees, as happened to Heckler a month or so ago as well as another guy I met in the same yard this year. Fortunately, they were both capable of doing the work themselves so no labour charges.
    Which seals? Does not sound like Volvo type from your description.

  3. #53
    Join Date
    Apr 2018
    Location
    Mooring, Faro
    Posts
    1,846

    Default Re: Stern Gland

    Quote Originally Posted by Pye_End View Post
    Which seals? Does not sound like Volvo type from your description.
    Read Heckler's post #22, don't know what the other make was.

  4. #54
    Join Date
    Dec 2010
    Location
    South Oxfordshire, Gosport and Wellington New Zealand.
    Posts
    8,334

    Default Re: Stern Gland

    Quote Originally Posted by Graham376 View Post
    You don't count a failure as potentially dangerous with loss of engine and the costs and trouble of having to lift out for repairs as disadvantages?

    OTOH, a dripping traditional gland can just be nipped up or repacked afloat easily.
    After extensive research over several years I am unaware of any dangerous failures of the Volvo type seal.

    So far, none on this post have reported any either.

    As to your last sentence, look up post #17 - The traditional stern gland fitted to my current boat was unadjustable without chiseling the nuts with large and long screwdrivers.

    Three seasons on my Orbitrade has been greased 3 times and is bone dry. It needs no burping after drying out and should be dry and reliable for many more years.

    And it was not expensive.
    Last edited by rotrax; 30-09-19 at 22:29.

  5. #55
    Join Date
    Feb 2006
    Location
    N Kent Coast
    Posts
    4,181

    Default Re: Stern Gland

    Quote Originally Posted by Heckler View Post
    Im still a fan of Volvo seals, my sudden liftout at Bruces last month was because the three year old Orbitrade look alike started leaking. Just doing a write up of the episode for PBO. Bottom line, the lip seals were badly worn or stretched, I cant quite make out which it is.
    Can you describe the quantity of leak/degree of urgency?

    Any idea of the cause?

  6. #56
    Join Date
    Sep 2019
    Posts
    58

    Default Re: Stern Gland

    Quote Originally Posted by pvb View Post
    They don't need expensive maintenance, and they really are not prone to "sudden failure and sinking"! When you've actually experienced one, come back and tell people how good they are.
    I recently started athread re Volvo Penta's which is an engine installed on a Freedom 35 I have now purchased, and your advice on starting it was spot on, not having experienced one previously.

    Following running the engine stern gland seal is leaking water which will be repaired.
    I researched the gland type and this is the result:

    The Volvo seal is entirely constructed from rubber, combining the hose that attaches to the stern tube with lip seals that prevent leakage of water into the boat. An internal bearing is water lubricated while the lip seals need to be greased occasionally from a small sachet available from the manufacturer. The lips run directly on the shaft, which needs to be smooth and damage free. Volvo seals are reliable and long-lasting, a life of 10 years being common.
    The seal is not vented in any way. On immersing the seal, whether at first launch or after drying on a tide, air will accumulate in the bearing. Running the shaft in this condition will cause a squealing noise and rapid wear. It is necessary to ‘burp’ the seal, compressing it in the lips area by hand to allow air to be dispelled. A small amount of water should be allowed into the boat to ensure that no air remains.

    A shaft seal would normally be replaced with the boat on the hard. It is possible to change a Volvo seal (or most other types) afloat, as this video shows. Not advisable without some experience of doing it in easier circumstances.

    The video is private and doesn't run.

    Mt question is, what does 'On immersing the seal' mean? Is it bad punctuation and should it read: On immersing, the seal' as surely the seal does not run immersed.
    The boat is currently in the water with someone keeping an eye on it and the pump running until she is moved to a drying out berth very soon hopefully.
    Mike

  7. #57
    Join Date
    Nov 2004
    Location
    Medway, UK, boat in SYH
    Posts
    2,389

    Default Re: Stern Gland

    Quote Originally Posted by Freedom35 View Post
    Mt question is, what does 'On immersing the seal' mean? Is it bad punctuation and should it read: On immersing, the seal' as surely the seal does not run immersed.
    The boat is currently in the water with someone keeping an eye on it and the pump running until she is moved to a drying out berth very soon hopefully.
    Mike
    On launching, when water comes up the prop shaft tube, air will accumulate in the bearing......

  8. #58
    Join Date
    Sep 2005
    Location
    Bristol Channel
    Posts
    239

    Default Re: Stern Gland

    Quote Originally Posted by Nauti Fox View Post
    I recently fitted new replacement DSS's, I know they're not particuarly well regarded, but it was a like for like replacement.
    All I can say is one of the original sets started dripping and gradually got worse, I don't know the age of them as they were on the boat when we bought it.
    The face of the static seal was very badly scored and grooved so its a surprise it was sealing as well as it was.
    The only tricky part was removing the gearbox coupling off the shaft which was carried out by Kent Marine Services.
    No need to burp the seal as it has a Y piece, one to vent, the other to supply water from the engine.
    They also have an "emergency" fitting, basically a big hose clip (red tag) which compresses the fixed part of the seal onto the shaft, which, obviously you have to secure so it doesn't rotate.
    The old rotating seal showed no sign of splitting but was far less elastic than the new one.

    My Achilles 9m had a DSS which had been used for years by the previous owner on a deep swinging mooring. When I moved it to a “drying” deep mud half tide mooring, it lasted a further 3 years. I replaced like for like; stern tube incompatible with Volvo and Radiche. This one also lasted 3 years. Abrasive mud? Now conventional, barely dripping.

  9. #59
    Join Date
    Sep 2019
    Posts
    58

    Default Re: Stern Gland

    Thanks for confirming best be sure.

  10. #60
    Join Date
    Feb 2003
    Posts
    15,735

    Default Re: Stern Gland

    Quote Originally Posted by Pye_End View Post
    Can you describe the quantity of leak/degree of urgency?

    Any idea of the cause?
    It started as a few minutes after burping then stop, then two and a half weeks later after, it got to be a drip every couple of seconds. Wasnt catastrophic but I was on my way to Albufeira for 9 months and as we arent resident all the time, discretion was the better part of valour and Bruces was nearby. I didnt do anything different cruising wise than I normally do. Interesting that the lip seals were about the same size as the shaft, so no stretch to grip the shaft. They seemed flexible enough so either worn or lost tension. I had a 5 years old vp one and that wasnt like it. The new vp definitely was a lot grippier.

Page 6 of 8 FirstFirst ... 2345678 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Latest YBW News

Find Boats For Sale

to
to