Anyone tried swapping S Cam Bushings withougt removing Cam?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by thesvg, Jun 5, 2011.

  1. thesvg

    thesvg Light Load Member

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    hey guys, I recentley found I have excessive play on my S Cam Bushing next to the Slack Adjuster. and since the 72 hour blitz is comming up, I need to swap em out. I was thinking of hitting that bushing out with a punch and hammer, and putting a new one in , with a 1 9/16 hollow pipe driving it it. could this be possible? Thank you! these bushings are in my trailer by the way. Thanks Alot!
     
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  3. canuck in da truck

    canuck in da truck Road Train Member

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    the outer bushing is probabely gone as well---but they dont seem to wear as fast as the inner bushing
    i have never done it--but i dont see why you cant use a hook to pull the seal--and then try and hook the old bushing out---for that matter if all you want is quick fix--you might be able to drive the old bushing in farther with the new one----or unbolt the cam carier and replace the bushiing as well
     
  4. mgfg

    mgfg Road Train Member

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    How would you do this when there are lock rings on the "S cam" that prevent it from sliding laterally? What about the outer bushing, you would have to remove it to replace the inner bushing wouldn't you?
     
  5. canuck in da truck

    canuck in da truck Road Train Member

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    the lock rings are on the end of s-cam , inboard of the slack adjuster---just pop the lock rings.washers and slack off
    the bushings usually drive in from their respective sides,and are removed the same way
    but with the cam in there--it will be challenging----i would rather just pop the wheels off and drum and shoes then have at it--might be quicker in the long run---also you might find something else in need of replacement at the same time----preventive maintenance
     
    thesvg Thanks this.
  6. thesvg

    thesvg Light Load Member

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    the inner bushings are fine, I'm talking about the outer one closest to the Slack adjuster. I can remove the cover, slack adjuster and the bushing will be free of obstructions so i can hit that bushing out with a punch and hammer, and drive a new one in it. the cam will not be moved at all.
     
  7. mgfg

    mgfg Road Train Member

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    Apparently you have it all figure out...Hammer away!
     
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  8. canuck in da truck

    canuck in da truck Road Train Member

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    how are you going to hit the bushing out,when it has to come out on the slack adjuster side????
    you might get lucky with a pick and pull it out,but keep in mind with the s-cam in there still--you will have zero workiing room



    i will be the first to admit i dont know everything--or some days very much--but i have replaced probabely upwards of a thousand s-cam bushings --
    but if your way will work--then go for it
    how can you tell the inner bushings are fine ,if the brakes hoes are still on?
    you wont know until you have the shoes off and physically grab the s of the cam and try and move it ,with the wheels on you can only check the inner bushing
     
  9. thesvg

    thesvg Light Load Member

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    hmmm youre right, I took a pry bar and jammed it in there and starting wedging (was instructed by a fleet mechanic). Seemed fine. but I have a dump trailer, there is plenty of room :) If I got the correct route I will more then likely be replacing the hub cap, seal, Axle nut, lock washer, seal bearing. and this short cut I want to take seems the least expensive one, I am currently thinking about swapping trailers. So I dont want to spend too much money on this one. Our load compensations are getting ridiculously cheap these days. :D But I am not afraid to take the correct route neither its just that I'm holding on to every penny possible on this situation :D
     
  10. thesvg

    thesvg Light Load Member

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    the cover can be removed, once the Slack adjuster is out of the way, its held by four torx bolts.
     
  11. canuck in da truck

    canuck in da truck Road Train Member

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    so you have the inboard drums---that makes it crappy with having to replace the seal
    i meant room around the bushing and grease seal
    i guess you could pump that sucker full of grease every morning and hope for the best--

    its not going to hurt to try tho--right,could try and get the grease seal out--but then your s-cam bushing will be inset about a 1/4 inch or so---so no room to drill and put a small screw in to pull it out---hmmm i would see if you could drive the seal in further maybe with a skinny punch or by using the new bushing
     
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