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clutch has a catch in it

Discussion in 'Trucks [ Eighteen Wheelers ]' started by gunner76, Oct 27, 2015.

  1. Oct 27, 2015 #1
    gunner76

    gunner76 Medium Load Member

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    my new EATON clutch with 9k on it has developed a slight catch in it. It started dong it a couple of weeks ago but was so infrequent that I couldn't find out what was wrong. Now it does it every time I push the pedal all the way in and then let it out. What is happening is that when the pedal catches, the throwout bearing rocks to the side a bit(this is what my buddy said when he watched as I moved the pedal). When I push the pedal all the way down it will have the catch right before the brake engages and then when I let up on the pedal it will catch right before I hit the free travel. If I only push the clutch in just far enough to get out of gear it will not have the catch. It is not in the pedal linkage because I unhooked that and it still did it, also you can hear something catch inside the bellhousing.

    Any ideas what could be causing this? The clutch works fine other than the slight catch. It is adjusted properly and there are no broken spring that I can see or anything laying in the bottom of the bellhousing. Also, the input shaft was replaced with the clutch.
     
    gunner76, Oct 27, 2015
    gunner76, Oct 27, 2015
    #1
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  3. Oct 27, 2015 #2
    Ozdriver

    Ozdriver Heavy Load Member

    767
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    Similar thing happened on my truck a few years ago, I was tearing my hair out to find the cause. Just pump a big heap of grease in the throwout bearing, too bad if it gets on the clutch brake. Fixed my problem, might fix yours.
     
    Ozdriver, Oct 27, 2015
    Ozdriver, Oct 27, 2015
    #2
    gunner76 and lots of character Thank this.
  4. Oct 27, 2015 #3
    lots of character

    lots of character Road Train Member

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    Seen grease keep a clutch bearing together after failure. Talk about luck.

    Was also some aerospace grease.
     
    lots of character, Oct 27, 2015
    lots of character, Oct 27, 2015
    #3
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  5. Oct 28, 2015 #4
    AModelCat

    AModelCat Road Train Member

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    Not really sure what you're describing. Did they replace/rebushing the cross shaft and release fork when they did the clutch? Wonder if maybe there is some extra slop there.
     
    AModelCat, Oct 28, 2015
    AModelCat, Oct 28, 2015
    #4
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  7. Oct 28, 2015 #5
    Ozdriver

    Ozdriver Heavy Load Member

    767
    1,390
    Oct 16, 2015
    Australia
    0
    What happened with mine is that although I was greasing it I wasn't putting enough in and somehow it made the release "catch" if this is what he means. It took an overdose of grease to make it good again. Bearing was ok.
     
    Ozdriver, Oct 28, 2015
    Ozdriver, Oct 28, 2015
    #5
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  8. Oct 28, 2015 #6
    baha

    baha Road Train Member

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    Look for hard to find grease fittings in side of bellhousing pointing to cross shaft that move throw out bearing an be sure to grease them on both sides of housing or replace them if they wont take grease?
     
    baha, Oct 28, 2015
    baha, Oct 28, 2015
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  9. Oct 28, 2015 #7
    drdesl

    drdesl Light Load Member

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    Suspiciously sounds like worn cross shafts, release fork, etc. Heck, there may be an inperfection on the new input shaft from where he dropped it on the floor before he installed it in the tranny.
     
    drdesl, Oct 28, 2015
    drdesl, Oct 28, 2015
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  10. Oct 28, 2015 #8
    BoxCarKidd

    BoxCarKidd Road Train Member

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    Once up on a time I took a transmission out again for the fun of it. While rushing through the job one of the clutch fork shafts protruded through the fork and was rubbing on the through out bearing housing. Yes the bolt was through the slot in the shaft but there was enough slop to allow that. Look it that but you may not be able to see it. Those bolts can be loosened through the inspection hole. I would work at that a little before pulling the trans.
     
    BoxCarKidd, Oct 28, 2015
    BoxCarKidd, Oct 28, 2015
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  11. Oct 29, 2015 #9
    gunner76

    gunner76 Medium Load Member

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    thanks guys. I'll try greasing it more and see what happens and if it doesn't work I'll keep looking. I have only greased it once and gave it my usual 4 pumps but maybe that wasn't enough.
     
    gunner76, Oct 29, 2015
    gunner76, Oct 29, 2015
    #9
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