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    Guest Message by DevFuse
     

    Photo

    Cxu Air Assist Clutch



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    9 replies to this topic

    #1 OFFLINE   cxn613

    cxn613

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    • Location:Mercersburg, Pa
    • Make:mack
    • Model:cxn613
    • Year:2004

    Posted 10 October 2010 - 07:59 PM

    We have already replaced the original air cylinder last winter, now the new one is starting to "stiffen up". Anybody else have problems? It makes it difficult to adjust pedal free play with the cylinder not acting properly.

    #2 OFFLINE   rhasler

    rhasler

      Wotta revoltin' development

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    Posted 10 October 2010 - 08:06 PM

    We have already replaced the original air cylinder last winter, now the new one is starting to "stiffen up". Anybody else have problems? It makes it difficult to adjust pedal free play with the cylinder not acting properly.

    There are parts available to change it over to the standard type clutch cable.
    "Mebbe I'm too ugly and stupid to give up!"

    #3 OFFLINE   fjh

    fjh

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    Posted 11 October 2010 - 12:15 AM

    There are parts available to change it over to the standard type clutch cable.

    Highly recommended I might add!
    On the newer engines these have caused a lot of greif!
    These rarly come adjusted correctly from the factory They tend to take out the clutch brake which then wipes out the sensor on the fly wheel housing two or three times before you get all the peices .
    The sensor is Not a nice thing to change.
    Funny thing is they blame the clutch brake when the real problem is the clutch adjustment.
    Delete the air doins and get back to the real clutch cable!

    #4 OFFLINE   9speed

    9speed

      Engine Started

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    • Location:Indiana
    • Make:Fleet
    • Model:CH/CX Series
    • Year:1999 through 2009

    Posted 12 October 2010 - 06:55 AM

    The conversion kit is cheaper than the parts to fix the air-assist (OEM) set-up

    #5 OFFLINE   cxn613

    cxn613

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    • Location:Mercersburg, Pa
    • Make:mack
    • Model:cxn613
    • Year:2004

    Posted 12 October 2010 - 06:49 PM

    Highly recommended I might add!
    On the newer engines these have caused a lot of greif!
    These rarly come adjusted correctly from the factory They tend to take out the clutch brake which then wipes out the sensor on the fly wheel housing two or three times before you get all the peices .
    The sensor is Not a nice thing to change.
    Funny thing is they blame the clutch brake when the real problem is the clutch adjustment.
    Delete the air doins and get back to the real clutch cable!

    Thanks for the reply. How much is the conversion kit and what is involved with making this conversion? Talked to our local Mack dealer and the service dept. hadn't heard of this kit. I gave them the service bullitan number today now im waiting for a return phone call from them.

    #6 OFFLINE   theakerstwo

    theakerstwo

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    • Location:mounds okla
    • Make:mack
    • Model:b61
    • Year:1957

    Posted 12 October 2010 - 07:34 PM

    Highly recommended I might add!
    On the newer engines these have caused a lot of greif!
    These rarly come adjusted correctly from the factory They tend to take out the clutch brake which then wipes out the sensor on the fly wheel housing two or three times before you get all the peices .
    The sensor is Not a nice thing to change.
    Funny thing is they blame the clutch brake when the real problem is the clutch adjustment.
    Delete the air doins and get back to the real clutch cable!

    Years ago on the old B models and early R with the air duplex it had a air assist and it would do same thing very offten. It was ok if some one owned the truck and knew how to adjust. But problem was you did not have a good feel of the free travel as in a manaul link.
    glenn akers

    #7 ONLINE   Mackpro68

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    Posted 12 October 2010 - 08:20 PM

    I was looking at a brand new 2011 CXU and GU on our lot and neither one had the air clutch assist on them. Guess the boss man ordered them without. Smart move.

    #8 OFFLINE   rhasler

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    Posted 12 October 2010 - 08:31 PM

    I was looking at a brand new 2011 CXU and GU on our lot and neither one had the air clutch assist on them. Guess the boss man ordered them without. Smart move.

    Our new trucks have been ordered without air assist also.
    "Mebbe I'm too ugly and stupid to give up!"

    #9 OFFLINE   monster1

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    • Location:san francisco bay area
    • Make:MACK
    • Model:CXU613 Pinnacle
    • Year:2012

    Posted 29 October 2012 - 10:29 PM

    Have 2012 MACK CXU613 Pinnacle with air assist clutch with 62,000 miles & 1 year of use. Had clutch adjusted 3 times by dealer so far. Each time you go about 2,000 miles & you find the play is out of the clutch. On the 3rd time they pulled trans & put in new clutch brake (& requested 2 piece clutch brake) as they said lining was worn...& not warranty, but "driver error"~have driven MACKs for 12 years, and never had a clutch problem like this new truck!!! Has anyone else had this experience?

    I'd found the info on after market conversion kit on this site, & that was helpful to me. Actually told dealer to look into this kit as they had no clue.

    #10 OFFLINE   Dzlbudman

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    Posted 30 October 2012 - 05:50 PM

    Check the breather on the Air Assist Clutch. Tends to get clogged and causes all sorts of problems




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