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Vibration diagnostics

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Trooper13, May 26, 2018.

Page 2 of 6
  1. Jun 2, 2018 #11
    Trooper13

    Trooper13 Light Load Member

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    Apr 16, 2018
    Casper, WY
    0
    Drive lines should be in phase, rear drive line is slightly off from the main but i believe that is common for later year trucks now. Had the steer brake drums mic'ed, they're round. Going to replace all brakes and hardware in about a week. Going to replace leveling valve then also for good measure. I'll keep trying to update as it goes, hope it helps someone else also
     
    Trooper13, Jun 2, 2018
    Trooper13, Jun 2, 2018
    #11
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  3. Jul 10, 2018 #12
    Trooper13

    Trooper13 Light Load Member

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    Apr 16, 2018
    Casper, WY
    0
    Search continues...

    Had to replace brakes so i replaced all brake hardware and drums. Replaced drive axle shocks (steers were replaced last summer). Replaced stree axle wheel seals and bearings. Replaced leveling valve, Kenworth did the work so should be set to correct measurement. That seemed to take a little of the force oou of the vibration but it's still there and fairly strong...
     
    Trooper13, Jul 10, 2018
    Trooper13, Jul 10, 2018
    #12
  4. Jul 10, 2018 #13
    benjamin260_6

    benjamin260_6 Medium Load Member

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    Aug 8, 2012
    Ontario, Canada
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    Have you tried jacking the front up and just putting something up against the face of the tire and spinning it to see if its out of round? Mine was only out slightly and it shook like crazy. Centred the wheel and drum and you wouldn't know it's the same truck.
     
    benjamin260_6, Jul 10, 2018
    benjamin260_6, Jul 10, 2018
    #13
    Cabinover101 Thanks this.
  5. Jul 11, 2018 #14
    Trooper13

    Trooper13 Light Load Member

    62
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    Apr 16, 2018
    Casper, WY
    0
    I have, near as I can tell it's good there...
     
    Trooper13, Jul 11, 2018
    Trooper13, Jul 11, 2018
    #14
  7. Jul 11, 2018 #15
    Mattflat362

    Mattflat362 Road Train Member

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    Feb 18, 2015
    Avon Lake, Ohio
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    Shut the engine off and kick it out of gear on a long steep hill (somewhere in your wheelhouse where you are comfortable) and see how she feels.
     
    Mattflat362, Jul 11, 2018
    Mattflat362, Jul 11, 2018
    #15
  8. Jul 11, 2018 #16
    Trooper13

    Trooper13 Light Load Member

    62
    29
    Apr 16, 2018
    Casper, WY
    0
    Vibration is still there rolling 60ish downhill and engine off...
     
    Trooper13, Jul 11, 2018
    Trooper13, Jul 11, 2018
    #16
  9. Jul 11, 2018 #17
    Mattflat362

    Mattflat362 Road Train Member

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    5,687
    Feb 18, 2015
    Avon Lake, Ohio
    0
    Ahg!!
     
    Mattflat362, Jul 11, 2018
    Mattflat362, Jul 11, 2018
    #17
  10. Jul 11, 2018 #18
    Mattflat362

    Mattflat362 Road Train Member

    2,693
    5,687
    Feb 18, 2015
    Avon Lake, Ohio
    0
    I say 100% tire. No idea which one but 45 to 55 is a tire from every tire thing I have ever read ever.

    Sucks! I waited 7 months to get 1/2 back from TA for a Yoko steer with 20k on it. I had to buy another in the mean time of course....after proving it was out of round.
     
    Mattflat362, Jul 11, 2018
    Mattflat362, Jul 11, 2018
    #18
  11. Jul 11, 2018 #19
    Trooper13

    Trooper13 Light Load Member

    62
    29
    Apr 16, 2018
    Casper, WY
    0
    Think I'd rather Chase a #### electrical short...
     
    Trooper13, Jul 11, 2018
    Trooper13, Jul 11, 2018
    #19
    Mattflat362 Thanks this.
  12. Jul 11, 2018 #20
    Trooper13

    Trooper13 Light Load Member

    62
    29
    Apr 16, 2018
    Casper, WY
    0
    Hard to say tire. Went about 4 months with no issue after changing stree tires. Might be drive tire but i don't understand how a drive can make the front feel like it's bouncing and chew up only the far outside edge of driver side stree
     
    Trooper13, Jul 11, 2018
    Trooper13, Jul 11, 2018
    #20
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