Turbo Clutch Wear Limit - will it slip before wear limit is reached?
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  1. #1
    Senior Member Pim205GTI's Avatar
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    Turbo Clutch Wear Limit - will it slip before wear limit is reached?

    Well the title says it all

    I am a bit puzzled. I am working on a conversion towards a hydraulic clutch. I made measurements and start to do some design work on it :



    On the left the total stack height of all the plates and discs, on the right the thickness of the various components : 3.28 thickness clutch plate

    The 42.7mm is coming from this measurement with CENTER, CLUTCH 22120-MC7-000 and the PLATE, CLUTCH PRESS 22350-MC7-000 put together :



    So to my calculations the clutch will start slipping when both parts cannot get closer. This is at 42.7mm and a clutch plate thickness of 3.27mm.

    The maintenance manual states that a new clutch plate has a thickness between 3.40mm and 3.58mm and gives a wear limit of 3.1mm.
    According the dimensions the clutch will start slipping long before it gets to the 3.1mm.

    So now the question, has anybody experienced clutch slippage long before the plates were at their wear limit or is my clutch out of spec?
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  2. #2
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    here is a setup i have used before on the cxs

    this one is on my nighthawk but the same idea

    Name:  clutch3.jpg
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    Name:  clutch 2.jpg
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  3. #3
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    If your clutch is slipping while the friction plates are still in spec, you need to take a look at your steel plates for wear.
    Especially the two piece plate.

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  5. #4
    Senior Member Pim205GTI's Avatar
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    I think I didn't explain it clear enough.

    This a detail from the previous drawing :

    The clutch springs press the outer part downward and the inner part upward. This motion is normally stopped by the clutch discs and so power can be transferred.
    In my CX500 Turbo clutch the motion is limited when the inner and outer part are bottoming out, see red circle!
    This means that my clutch will start to slip when the plates still have a thickness of 3.28mm or 0.18mm or roughly 37% left
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