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Thread: Garrard SP25 Mk IV Running slow

  1. #1
    Join Date: Jan 2013

    Location: Birmingham

    Posts: 5,079
    I'm James.

    Default Garrard SP25 Mk IV Running slow

    Anyone got any suggestions how i can improve the speed stability on my Gerrard SP25 mk IV. It appears to be running slow with piano notes sounding warbly.
    VPI Scout 1.1 - Ortofon 2M Black FGS - Croft 25R+ - Croft Series 7 - Spendor SP2

  2. #2
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 5,312
    I'm Alan.

    Default

    Really good clean and relube?

    Replacement idler wheel?

  3. #3
    Join Date: Jul 2009

    Location: Hampshire, UK

    Posts: 2,924
    I'm Buriedunderaloadofturntables.

    Default

    It sounds like a motor or idler issue as this deck has a synchronous AC motor, so speed canít be adjusted.

    As above, a good service should sort it out.
    Adam.

  4. #4
    Join Date: Jan 2013

    Location: Birmingham

    Posts: 5,079
    I'm James.

    Default

    Thanks chaps, I will open it up at the weekend and give it a good clean and service. I feel the old oil may have gone a bit waxy and idler wheel maybe either worn or contaminated?
    VPI Scout 1.1 - Ortofon 2M Black FGS - Croft 25R+ - Croft Series 7 - Spendor SP2

  5. #5
    Join Date: Jan 2020

    Location: South Yorkshire

    Posts: 2,424
    I'm Andre.

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    Motor still wants oiling.. I would personally start with that.

  6. #6
    Join Date: Jan 2020

    Location: South Yorkshire

    Posts: 2,424
    I'm Andre.

    Default

    Forgot to mention the idler wheel, i used to use Armor Hall rubber restorer. These usually go a bit hard and get a shiney surface to the edge of the wheel & some decks can get a flat spot if left in speed for a long time hence rumble..

  7. #7
    Join Date: Jan 2013

    Location: Birmingham

    Posts: 5,079
    I'm James.

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    What would be the best chemical to remove the old oil/gunk and what oil is best for relubing?
    VPI Scout 1.1 - Ortofon 2M Black FGS - Croft 25R+ - Croft Series 7 - Spendor SP2

  8. #8
    Join Date: Jan 2020

    Location: South Yorkshire

    Posts: 2,424
    I'm Andre.

    Default

    Dont use anything like 3 in 1 oil.. Something thin, maybe a bit of sewing machine oil in the motor. Before servicing the idler with rejuvenator i used to rub em over with Isopropyl Alchhol.. No different than cleaning over a hard Pinch roller..

  9. #9
    Join Date: Nov 2014

    Location: Birmingham

    Posts: 88
    I'm Michael.

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    To keep the idler sweet on my 401, I take the idler off, then using a new green scouring pad stretched out on a table gently clean the edge of the idler, rotating it as you go.
    Using chemicals can harden the rubber, also, make sure that there aren’t any flats on the idler due to the turntable being left in the on position without the power on.

  10. #10
    Join Date: Jan 2013

    Location: Birmingham

    Posts: 5,079
    I'm James.

    Default

    Quote Originally Posted by mbic View Post
    To keep the idler sweet on my 401, I take the idler off, then using a new green scouring pad stretched out on a table gently clean the edge of the idler, rotating it as you go.
    Using chemicals can harden the rubber, also, make sure that there aren’t any flats on the idler due to the turntable being left in the on position without the power on.
    Thanks for the advice Michael. I fear the idler wheel has been left engaged against the platter rim when the TT has been switched off and may have a flat spot so will have a go with a scourer.
    VPI Scout 1.1 - Ortofon 2M Black FGS - Croft 25R+ - Croft Series 7 - Spendor SP2

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