Clutch Problems

Discussion in 'Trucks [ Eighteen Wheelers ]' started by terrylamar, Dec 26, 2010.

  1. canuck in da truck

    canuck in da truck Road Train Member

    4,352
    2,597
    Aug 6, 2010
    western pa
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    good idea to take it to somebody who knows how to PROPERLY adjust the clutch
    if you get some idiot in there messing with the linkage--you will have issues
    there is a measurment for inbetween the brake face and the release bearing--that is what should be addressed firs--then see if the kinkage needs adjustment to bring free play into range--preferabely about 1 1/4 inch the brake measurment --is roughly around 3/8 of an inch--i could be wrong--i had a piece of square stock made up for that measurment
     
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  3. Don2WS

    Don2WS Medium Load Member

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    Feb 26, 2010
    Sturtevant WI
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    i absolutely agree with you last month one of my drivers went out to vegas and the truck looked awful due to the sand in wyoming so he decided to get it washed some smart guy decided to put the steam cleaner next to one of the clutch linkage joints and leave it grease free. So my driver loaded that night at the paper factory behind the flying j and made it to salt lake. I get a call next morning and he tells me the clutch is action up and i know that the clutch is less than a year old so i tell him to take it to the kw dealer in valley city. They check the truck and tell me its a clutch brake within an hour. They replace that and see that the clutch is good. So they decide to mess with the linkages but never to lube the joint. So i get drained with $450 and my driver complaining that the truck is not the same. He unloads in Chicago and comes over to the shop i drive the truck and i could definitely tell the clutch was funny. I open hood and i'm welcomed by a rusty linkage joint so i take the linkage off and leave it soaking in diesel fuel and call it a day. I sold the truck a two weeks ago and i still haven't found the same length that the linkages used to be because on teh original owner was a big pete fan so he did some frankinstein experiments from an older autocar and the clutch felt almost like a pete. Sorry for writting an essay but i learned my lesson of letting any bone head with a certificate mess with one one of my trucks :biggrin_25513:
     
  4. ironeagle2006

    ironeagle2006 Road Train Member

    Eatons Standards are 1/16 inch Between the linkages inside the Bellhouse for the TO Bearings an then 1/4 inch on the Clutch Brake they have a set of tools that a Good Mechanic is Provided with from Eaton to Adjust the Clutch With not some thing he has to guess with on free play.
     
  5. FYDA FREIGHTLINER CINCY

    FYDA FREIGHTLINER CINCY Light Load Member

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    Apr 28, 2009
    Cincinnati, ohio
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    adjust the pressure plate to 1/2 inch between clutch brake and release bearing. adjust linkage to 2 inches of free travel or 1/16 inch between fork and release bearing. make sure crosshafts in bellhousing are tight and all linkage is good and tight. you should rarely ever have to adjust the linkage. don't let somebody adjsut the linkage before adjusting the pressure plate.

    check for metal laying in bottom of bell housing. if you have metal in bell housing its from the springs in the clutch disc. the pieces of metal could be stuck between the disc, flywheel, intermediate plate and pressure plate. this will cause a hard to get into gear complaint. could also cause a slippage issue
     
    canuck in da truck Thanks this.
  6. DL550CAT

    DL550CAT Road Train Member

    1,427
    1,479
    Oct 18, 2009
    Waynesburg, Pa
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    Thats what I have always been told and done. I use a long 1/2 bolt for a guage.
     
  7. FYDA FREIGHTLINER CINCY

    FYDA FREIGHTLINER CINCY Light Load Member

    270
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    Apr 28, 2009
    Cincinnati, ohio
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    1/2 inch drive extension works great too
     
  8. old-six-pack

    old-six-pack Heavy Load Member

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    Oct 24, 2007
    vernon hill, va
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    listen to this guy,,,,,adjust the inner adjustments and leave the outter as they WERE:biggrin_2553:
     
  9. Pablo-UA

    Pablo-UA Road Train Member

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    1,634
    Oct 11, 2010
    Borispol, Ukraine
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    Do all like he recomend. but... if brake is not fully worn
     
  10. JohnP3

    JohnP3 Road Train Member

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    Feb 21, 2010
    Rock Creek B.C. Canada
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    I have two 5/16 long bolts joined together and the heads are 1/2 inch, That is the important part. The clearance to the brake adjusted buy the ring, I use the two piece steel clutch brake even from new, and adjust the pedal free play depending on wear, you want the release bearing to release I do not care about the exact measurement. 1/16 works if linkage, cross shafts, and bushings are good.
    If you have a clutch brake failure and it is dry it will eat the bearing cover on the transmission, then you need to remove the transmission the replace that. If you replace the clutch and not the transmission input shaft you could have problems releasing the clutch. Whenever the transmission is out, I recommend changing the cross shaft bushings at least. Some people swear you never have to change the input shaft, I change it every time. If you want warranty you have to change it.
    Once the linkage is adjusted properly you only have to adjust that for linkage wear never for clutch wear.
    If the clutch is abused the ceramic pucks will cup and cause a lot of drag.
    Grease on a clutch brake does not effect its capabilities, it is made to run in grease.
     
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