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Thread: Tacho drive core lubrication

  1. #1
    59pacer's Avatar
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    Default Tacho drive core lubrication

    Any suggestions what to use to lubricate the tacho flexible drive core? I've read of using nothing, graphite powder, spray dry lube, lubriplate, and No.5 grease.
    With the engine out at the moment, it's no issue to pull the core and treat it.

  2. #2
    Glen Geller's Avatar
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    Default Re: Tacho drive core lubrication

    Various suggestions found on the interwebs, but I like this one because the author bothered to make an entire procedure.
    https://www.piperflyer.org/forum/mai...ach-cable.html

    Some additional thoughts on the subject:
    http://www.aviationbanter.com/showthread.php?t=3141
    https://backcountrypilot.org/forum/c...h-cables-22494
    https://vansairforce.com/community/s...ad.php?t=71272

  3. #3
    J Ryd's Avatar
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    Default Re: Tacho drive core lubrication

    I did exactly what the Van's airforce guy did in the last link. I dont like using grease or oils because I think it would attract grime. Remove cable from tach and engine; Remove tiny C-clip from end of cable housing; Pull cable out of sleeve; Check cable for kinks or broken strands; Clean and blowout cable and sleeve with brake clean; Feed graphite in slowly while spinning/feeding cable back in. Yes it makes a mess.

    Jan
    ​Jan
    1960 PA22-150 "Spud"

  4. #4
    Administrator Steve Pierce's Avatar
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    Default Re: Tacho drive core lubrication

    All the tack cables I have ever removed had grease in them. Both ends are sealed.

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    Default Re: Tacho drive core lubrication

    Quote Originally Posted by 59pacer View Post
    Any suggestions what to use to lubricate the tacho flexible drive core? I've read of using nothing, graphite powder, spray dry lube, lubriplate, and No.5 grease.
    With the engine out at the moment, it's no issue to pull the core and treat it.
    I kind of expected it to be on the lube chart on the inspection form. Unfortunately it was not.

    In my experience, I have found that the FAA prefers some equivalent data over no data, i.e. like not being included on the lube chart.

    In this case Cessna has a single engine M.M. entry about using the AC speedometer lube or Lubriplate No. 110.


    Todd
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    Last edited by Vagabondblues; 11-24-2020 at 11:59 AM. Reason: clarity

  6. #6
    andya's Avatar
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    Default Re: Tacho drive core lubrication

    I got a recommendation from Webco, Comanche specialist, for my PA-30 tach that was jumping around.
    It was lubiplate product and that part number seems like it was that one, ie Lubriplate No. 110.. Pulled the inner part of the cable, cleaned it,
    then reinstalled from instrument panel to the engine distributing l light amounts with rubber cloves as I put it back it.
    Has worked great.
    "Progress is our most important problem"

  7. #7
    59pacer's Avatar
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    Default Re: Tacho drive core lubrication

    I used a light application of lubriplate during restoration 17 years/ 1000hours ago, and that has worked fine.
    I could get out of bed and wander half naked down the stairs to the hangar to check the number on the side of the lubriplate can, but I'll leave that for a later post!

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