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Thread: KAD44 issue

  1. #41
    Join Date
    Apr 2007
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    midlands
    Posts
    7,299

    Default Re: KAD44 issue

    When the clutch is past it’s best it demands more current to work this leads to voltage drop , the gauges suffer , the revs drop on the gauge , check the 7.5 amp fuse side of black electric box .
    Then I’ll meet to you Santa Eulalia on the 14/07/ ��

  2. #42
    Join Date
    May 2001
    Location
    ation, Loc: ation, Loc: ation.
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    16,318

    Default Re: KAD44 issue

    Quote Originally Posted by volvopaul View Post
    When the clutch is past it’s best it demands more current to work this leads to voltage drop , the gauges suffer , the revs drop on the gauge , check the 7.5 amp fuse side of black electric box .
    Then I’ll meet to you Santa Eulalia on the 14/07/ ��
    Thanks Paul.

    I know it's a long thread already but the revs are actually rising like someone blipping the throttle (along with the screeching noise). We're not seeing any drop in indicated revs.

    Sadly we're not onboard for a while so won't be able to catch up with you in Ibiza this time .

  3. #43
    Join Date
    Sep 2002
    Location
    South
    Posts
    16,681

    Default Re: KAD44 issue

    Quote Originally Posted by petem View Post
    Thanks, so alternator or pulley would be your guess?
    Or the supercharger clutch

  4. #44
    Join Date
    Dec 2004
    Location
    Sussex
    Posts
    1,578

    Default Re: KAD44 issue

    Quote Originally Posted by Portofino View Post
    Another reason possibly for the symptoms if the screeching comes on when cruising , up on the plane is a turbo is on its way out , dropping boost so the SC starts or trys to engage .Its a bit masked by the other ( good ) engine initially.
    But eventually as time passes it be becomes apparent.
    So the knackered SC clutch is caused by a increasing lazy turbo .
    We had exactly this scenario, complete with a short screech when the SC engages at 2600, but it's not what petem describes.
    Adrian is searching for his next boat....

  5. #45
    Join Date
    Oct 2003
    Location
    west yorkshire
    Posts
    3,954

    Default Re: KAD44 issue

    Just for clarity as the role of the compressor and the engage/disengage rpm keeps coming up.
    From the Fuel injection manual for the KA(M)D 44 and 300 engines; Volvo Manual Fuel System EDC page 17.
    Electromagnetic clutch (23)
    The compressor is engaged and disengaged by an electromagnetic clutch.
    The control modul decides when the compressor should be engaged, depending on operation situation and a number of parameters, as follows:
    • After starting: The compressor is engaged to make the engine warm up faster and reduce white smoke when the engine is cold.
    Parameters:
    – coolant temperature below 60C (140F)
    – reverse gear in neutral
    Note: The lower the coolant temperature is, the longer is the time that the compressor is en- gaged.
    • In normal operation: The compressor is en- gaged to give extra power for critical situations, headwinds or increased speed.
    Parameters:
    – injected fuel volume (load)
    – engine speed ~1000–2800 rpm.
    • On rapid acceleration: The compressor is en- gaged immediately on rapid acceleration (“kick- down”).
    Parameters:
    – difference between demanded and current
    engine speed exceeds 1000 rpm.
    – engine speed 700–2800 rpm.

  6. #46
    Join Date
    Apr 2011
    Location
    Boat- Western Med
    Posts
    5,188

    Default Re: KAD44 issue

    Quote Originally Posted by kashurst View Post
    Just for clarity as the role of the compressor and the engage/disengage rpm keeps coming up.
    From the Fuel injection manual for the KA(M)D 44 and 300 engines; Volvo Manual Fuel System EDC page 17.
    Electromagnetic clutch (23)
    The compressor is engaged and disengaged by an electromagnetic clutch.
    The control modul decides when the compressor should be engaged, depending on operation situation and a number of parameters, as follows:
    • After starting: The compressor is engaged to make the engine warm up faster and reduce white smoke when the engine is cold.
    Parameters:
    – coolant temperature below 60C (140F)
    – reverse gear in neutral
    Note: The lower the coolant temperature is, the longer is the time that the compressor is en- gaged.
    • In normal operation: The compressor is en- gaged to give extra power for critical situations, headwinds or increased speed.
    Parameters:
    – injected fuel volume (load)
    – engine speed ~1000–2800 rpm.
    • On rapid acceleration: The compressor is en- gaged immediately on rapid acceleration (“kick- down”).
    Parameters:
    – difference between demanded and current
    engine speed exceeds 1000 rpm.
    – engine speed 700–2800 rpm.
    Last time I saw that complexity was when I looked into the rubics cube

    Hence we , the royal we ( forum ) are all over the place with this .

  7. #47
    Join Date
    May 2001
    Location
    ation, Loc: ation, Loc: ation.
    Posts
    16,318

    Default Re: KAD44 issue

    Hhhmmm. Mechanic has been to the boat a couple of times. No belt dust or smell of slipping belt in engine bay.

    He'll take it out at the weekend and see if he can get the issue to re-occur.

    Pete

  8. #48
    Join Date
    Oct 2003
    Location
    west yorkshire
    Posts
    3,954

    Default Re: KAD44 issue

    That is essentially good news, nothing obviously wrong and no smoke dust etc. A good thrash around the bay should reveal any weakness in the belt system. Could just be your partner sat at 1000rpm and cooked the clutch/belt as it engages/disengages.
    Have the fuel filters been changed?

  9. #49
    Join Date
    Apr 2011
    Location
    Boat- Western Med
    Posts
    5,188

    Default Re: KAD44 issue

    Quote Originally Posted by kashurst View Post
    Have the fuel filters been changed?
    Who knows unless you DIY ? , he will have a bill for them that’s for sure .

    67F3DF42-3196-4D83-8F54-FC4F18E8E656.jpg

    Can you see what I have done here ?

  10. #50
    Join Date
    May 2001
    Location
    ation, Loc: ation, Loc: ation.
    Posts
    16,318

    Default Re: KAD44 issue

    Quote Originally Posted by kashurst View Post
    That is essentially good news, nothing obviously wrong and no smoke dust etc. A good thrash around the bay should reveal any weakness in the belt system. Could just be your partner sat at 1000rpm and cooked the clutch/belt as it engages/disengages.
    Have the fuel filters been changed?
    Spoke to my partner again today, he said he had the issue on initial start up and then when he tried it again after refuelling. The idea of it being filters would make some sense as the trip over to Ibiza may have stirred up some sediment in the tank. I'll see if Andy wants to check the filters before he takes it for a test run at the weekend.

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