Grease coming out on S Cam side after greasing

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Edjahman, Nov 29, 2020.

  1. Edjahman

    Edjahman Medium Load Member

    529
    318
    Apr 2, 2013
    0
    Hi.

    I kinda went crazy with the grease gun recently because I thought that you are supposed to grease the S Cam tubes until grease comes out on the slack adjuster side of the S Cam tube.

    On 2 axles I had grease coming out on the S Cam side causing a huge problem. I cleaned it up and that was a huge pain.

    Are there seals on the S Cam side of the tube? Did I just go crazy with the grease gun?

    I was under the impression that the S Cam side is sealed and that's not supposed to happen?

    Does it all need to be dismantled and new seals put in? I was trying to avoid pulling out the S Cam shafts but if it needs to be done I understand.

    Thank you!
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. stillwurkin

    stillwurkin Road Train Member

    1,725
    2,782
    Dec 2, 2017
    0
    Just keep cleaning excess grease. Mine gets on the inside of brake shoe yes its a mess. Runs down. There is a seal but in my experience not quite like a tight oil seal. Wouldn't think you have harmed anything. I grease my own truck except when i get oil changed. Had to tell speedco not to grease s-cams as they over grease. Just a couple shots will suffice. Of course it depends length of lube intervals. I like to grease every 2 weeks. Some say thats to much. Also if the trk is in dust etc too. Just water, and salt water up north this time of year is bad also.
     
    Edjahman Thanks this.
  4. Edjahman

    Edjahman Medium Load Member

    529
    318
    Apr 2, 2013
    0
    Yeah I like to grease my truck and trailer myself because I like to be in control of it.

    I run the southwest and avoid winter as much as possible.

    Thank you for your reply! I appreciate it!
     
    stillwurkin Thanks this.
  5. stillwurkin

    stillwurkin Road Train Member

    1,725
    2,782
    Dec 2, 2017
    0
    I may add a friend of mine says don't grease u-joints till you force grease out around the seals. I always have, since my dad taught me. Like 50 years ago. Still do. Never had a failure because of it. But it does sling out and make a mess. But he does it his way, i do mine.
     
    blairandgretchen and Edjahman Thank this.
  6. Edjahman

    Edjahman Medium Load Member

    529
    318
    Apr 2, 2013
    0

    I definitely need to up my greasing skills.

    Thank you for the information!
     
    blairandgretchen and stillwurkin Thank this.
  7. AModelCat

    AModelCat Road Train Member

    19,443
    86,172
    Jul 7, 2015
    Canuckistan
    0
    There usually is a lip seal there. When the cam and bushings are new, there's very minimal play. As the bushings and cams wear, there gets to be some slop in there and that can affect the seal's ability to work. Personally if the cam and bushings aren't excessively worn I wouldn't go to the trouble of replacing those inner seals. Most cases you'll have to pull the hubs to get the cam out. I'd just continue greasing them regularly and just watch the inner part of the cam and stop once grease appears.


    With the u-joints I normally grease until I can hear them crackle, then slowly pump grease in until I can just see grease at each cap. That way I know each one has lubrication and there isn't a lot of grease getting slung around over everything.
     
  8. Edjahman

    Edjahman Medium Load Member

    529
    318
    Apr 2, 2013
    0

    Thank you. I appreciate the information.
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  • Draft saved Draft deleted