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  1. #1
    Join Date: Feb 2011

    Location: Troon

    Posts: 2,476
    I'm tony.

    Default Oil change advice

    I run a lenco gl75 that had been sounding fantastic....but with a change of bearing-pure pish!

    Initially Brian and me degreased it and put some lithium grease in it-still awfull....john martyn sounding even more pished and drugged than usual.

    I suspected too much stiction and the bearing not having loosened up.

    We then tried motorex 5w/30w fully synthetic- bingo the big man has sobered up and sounding good.

    I tend to keep my listening room/house rather cool.

    Another play last night and big JM is pished again.

    Ambient tempreture and viscotity are the devils work here...

    Whats you thought on going gt85/wd 40 till things loosen up?

    Ceramic bearing source is in the middle east........ a tad warmer than my gaff!!!

  2. #2
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 6,089
    I'm Alan.

    Default

    I'd put the old bearing back in if it had been sounding fantastic.

    Just my 2p

  3. #3
    Audio Al is offline Pishanto Specialist & Super-Daftee
    Join Date: May 2012

    Location: Dagenham Essex

    Posts: 11,215
    I'm Allen.

    Default

    3 in 1 or sowing machine oil
    [

  4. #4
    Join Date: Feb 2011

    Location: Troon

    Posts: 2,476
    I'm tony.

    Default

    Thanks gents-new super duper bearing maybe aint so great after all....

  5. #5
    Join Date: May 2012

    Location: Toulouse, France

    Posts: 6,562
    I'm Kevin.

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    I would not us WD40. It is hygroscopic.
    Kevin

    Too busy enjoying the music....

    European loan coordinator for Graham Slee HiFi system components..

  6. #6
    Join Date: Oct 2008

    Location: Glasgowshire

    Posts: 9,656
    I'm Gary.

    Default

    Tony,
    I'd strongly recommend Audio Origami bearing oil.
    Use it in my turntable, wouldn't use anything else.

    To give you an idea how good it is compared even to the oil Michell supply (who know a thing or two about turntables) I changed it out for the Audio Origami stuff to compare.

    Doing the platter "spin test", with the AO oil the platter spun about twice as long.
    Less friction = better.

    Go with this mate, it just works.


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  7. #7
    Join Date: Jan 2009

    Location: Deleted

    Posts: 6,585
    I'm Deleted.

    Default

    Quote Originally Posted by Gazjam View Post
    Tony,
    I'd strongly recommend Audio Origami bearing oil.
    Use it in my turntable, wouldn't use anything else.

    To give you an idea how good it is compared even to the oil Michell supply (who know a thing or two about turntables) I changed it out for the Audio Origami stuff to compare.

    Doing the platter "spin test", with the AO oil the platter spun about twice as long.
    Less friction = better.

    Go with this mate, it just works.
    Equating the time the platter takes to come to a halt with friction is not really accurate. Friction could be the cause but drag imparted by shear forces within the oil are far more likely. Essentially, a thin oil will allow the platter to spin for longer but a thicker oil will make the bearing more rigid - in both cases the friction is not altered. In my own magnetic bearing there is no direct contact between the bearing parts and friction is close to zero. However, because the oil is very thick the bearing does not spin for long. If a turntable were a bicycle then 'spin down speed' would be relevant but a turntable only has to go at one consistent speed and a very slow one at that. In addition, friction levels are very low compared to relative motor power and is easily overcome. Indeed, I would counter, there are clear advantages in causing the motor to see increased load rather than decreasing it.

    ---------

    I would strongly recommend that a ceramic ball bearing is not used in a standard bearing as it will be significantly harder than any tool steel main shaft or thrust pad and will cause increased wear in these components.
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  8. #8
    Join Date: Apr 2012

    Location: N E Kent

    Posts: 51,624
    I'm Geoff.

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    Yes. I agree with all that Mark.
    It is impossible for anything digital to sound analogue, because it isn't analogue!

  9. #9
    Join Date: Jan 2009

    Location: Deleted

    Posts: 6,585
    I'm Deleted.

    Default

    I'm not picking on Gazjam in particular, it's more that his post happens to summarise a commonly held misunderstanding regarding the time it takes for a platter to lose speed and friction and advantages/disadvantages.
    Account Deleted

  10. #10
    Join Date: Feb 2011

    Location: Troon

    Posts: 2,476
    I'm tony.

    Default

    pulled the bearing out cleaned it up with brake cleaner and applied gt85.

    The stiction was noticeably reduced in my hand-once installed the platter spun far more freely.

    John Martyn now sounded a bit like choir boy, had to have a play around with speed settings, but got there.

    Will wait for an adult to come over and assist with set up.

    Thanks everyone-bit a learning curve for me!

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