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Disassembling the plastic cover of the Suunto SK-5/SK-6 compass

Discussion in 'Repairing your own Gear' started by Adr1an, Feb 13, 2020.

  1. Adr1an

    Adr1an Photographer

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    Suunto 1.jpg Suunto2.jpg Suunto 1.jpg Suunto2.jpg I have this compass (bought with a lot of different other gear) and it is somehow "lazy" (as in needs to be tilted a bit to go towards north). It may be set on a different zone (being old enough to be from the 5 zones era) but my guess is that the needle just lost a bit of it's magnetic properties.
    Therefore I'm looking to get it out of it's plastic case so I can tape a rare earth magnet on the side of the module overnight and hope for the best.
    Anyone knows how to take apart this type of case without breaking it? (the grey plastic part I mean) The base won't just unscrew, at least not by using "reasonable" force. Thanks in advance for your help.
     
  2. rhwestfall

    rhwestfall Solo Diver

    # of Dives: 200 - 499
    Location: "La Grande Ile"
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    IIRC, it is a liquid filled and sealed case, so if yours is dry, it might explain some of the problem.

    Not really intended to be opened..
     
  3. Adr1an

    Adr1an Photographer

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    I am talking about the grey case (that helps the module sit inside the boot) not about the module itself. The sealed case you're talking about is transparent and sits inside this grey plastic case. This is how the module itself looks like (for the current model, the SK-8).
     

    Attached Files:

  4. Adr1an

    Adr1an Photographer

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    I thought it may be totally empty but it sinks even after I removed it from the rubber boot. It also has a certain slowness when tilting the card which makes me believe it still has the oil inside.
    If it's empty that would be an easy fix after I take it from the grey case. (hot needle makes small hole, fill with syringe, patch hole with silicone/epoxy)​
     
  5. Adr1an

    Adr1an Photographer

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    No one knows how to disassemble (without damaging it) the grey case?
     
  6. Adr1an

    Adr1an Photographer

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    In case someone else runs into the same problem: the compass had no physical damage and was still filled with oil. The problem was sorted out by re-magnetizing the needle using a rare-earth magnet taped overnight on the outer edge of the top screen (without having to disassemble the grey case).
    Pay attention to attach the magnet when the card is already tilted towards the screen, to avoid damaging the needle or the axle. The magnet should be small enough to avoid being directly over the needle. Don't try to do this using the magnet on the side of the compass as it won't get close enough to the needle.
    It works flawlessly now.
     
    couv and tmassey like this.
  7. Ripley

    Ripley DIR Practitioner

    # of Dives: 25 - 49
    Location: Belgium
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    Seems you solved the issue without removing the compass from its booth.
    I'm not really familiar with this type of booth but in general any booth tends to remove itself a bit easier after having it soaked in warm (not hot!) water.
    Just don't force it.
     
  8. Adr1an

    Adr1an Photographer

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    Have a look at the photos. the compass was removed from the booth before I started the topic. The question was about the grey plastic case that helps the module sit inside the rubber boot.
     

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