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Trailer repair. Now what???

Discussion in 'Trucks [ Eighteen Wheelers ]' started by xsetra, Oct 30, 2016.

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  1. Oct 30, 2016 #1
    xsetra

    xsetra Road Train Member

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    Removed top deck to r+r, found internal members rusted, cracked.
    Do I have to replace cross beams or can I weld flat stock to these cracked pieces. IMG_20161030_161617484.jpg IMG_20161030_161627239.jpg IMG_20161030_161632134.jpg IMG_20161030_161747897.jpg IMG_20161030_161643586.jpg IMG_20161030_161632134.jpg IMG_20161030_161729316.jpg IMG_20161030_161735313.jpg IMG_20161030_161747897.jpg
    The metal shaped like an "X" with a circle in the middle is the top side of the kingpin.
    This is a 1999 trailer all steel on the top deck. Should I have kingpin plate replaced while I have this all open.
    At a minimum I plan to weld 4" wide 1/2" thick plate to the sides of the cross members. Will that be adequate?
    Thanks for any remarks.
     
    Last edited: Oct 30, 2016
    xsetra, Oct 30, 2016
    xsetra, Oct 30, 2016
    #1
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  3. Oct 30, 2016 #2
    j_martell

    j_martell Light Load Member

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    Doesnt look like theres much left to weld to....

    I'd cut em out....but thats just me....
     
    j_martell, Oct 30, 2016
    j_martell, Oct 30, 2016
    #2
    Toomanybikes, xsetra and IH Truck Guy Thank this.
  4. Oct 30, 2016 #3
    passingthru69

    passingthru69 Road Train Member

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    Yea you start welding on old rusty steel, I think your just bringing on more headache. I agree with prior poster. Replace all the old steel
     
    passingthru69, Oct 30, 2016
    passingthru69, Oct 30, 2016
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  5. Oct 30, 2016 #4
    xsetra

    xsetra Road Train Member

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    the first picture show the two main pieces with kingpin in center.
    Replace the two main pieces and the 4 short pieces between.
    Thanks.
     
    xsetra, Oct 30, 2016
    xsetra, Oct 30, 2016
    #4
  7. Oct 30, 2016 #5
    AModelCat

    AModelCat Road Train Member

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    With the amount of corrosion there, I'd start by sandblasting the area so you can see the extent of the corrosion damage and then go from there. Corrosion can go either way. Sometimes the damage is much worse than you expect. Other times its not nearly as bad as it could be.
     
    AModelCat, Oct 30, 2016
    AModelCat, Oct 30, 2016
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  8. Oct 30, 2016 #6
    xsetra

    xsetra Road Train Member

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    What I found today is much worse than I expected.
     
    xsetra, Oct 30, 2016
    xsetra, Oct 30, 2016
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  9. Oct 30, 2016 #7
    BoxCarKidd

    BoxCarKidd Road Train Member

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    Is the X not the king pin? Replace it while you are there.
    It is a bit difficult to say from a picture but I always try to make it a least equal to but prefer stronger than original.
    If the lower plate is good, cut those four angles out and the pin. Put in a new pin. Use 1/4 " flat plate laid over what is there on the front and rear. That is from inner frame to inner frame. On top of what is there. Another piece at a 90 at the bottom of the picture would be good. Then put some heavy metal between them on top of the pin.
    Not sure that is explained well but the surrounding material is equaling compromised so do extra to make up for it.
     
    BoxCarKidd, Oct 30, 2016
    BoxCarKidd, Oct 30, 2016
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  10. Oct 31, 2016 #8
    xsetra

    xsetra Road Train Member

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    Yes the X is the kingpin. You explained it well enough for me to understand.
    I have some 3/8" thick 4"x1" C channel and some 3/8' thick 4" flat stock.
    I'm going to clean existing and sister new metal to existing.
    Laying C channel 4" flat side down then weld 4" flat on top of 1" to extend up the side of existing cross beam. Do this on both cross beams and put new C channel where all four little pieces are between by the kingpin.
    Thanks for the advice
     
    xsetra, Oct 31, 2016
    xsetra, Oct 31, 2016
    #8
  11. Oct 31, 2016 #9
    AModelCat

    AModelCat Road Train Member

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    Just be aware when welding that the tolerance on a kingpin is something like 1 degree max off from being perfectly vertical IIRC.
     
    AModelCat, Oct 31, 2016
    AModelCat, Oct 31, 2016
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  12. Oct 31, 2016 #10
    xsetra

    xsetra Road Train Member

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    I am going to leave original in place.
    The repair I do today is to get me by for a couple weeks/ month and then take it to a trailer shop and have them replace all the innards, the kingpin and plate.
    Trailer is a 99 and probably better having all new put in.
    Thanks.
     
    xsetra, Oct 31, 2016
    xsetra, Oct 31, 2016
    #10
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