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Thread: King pin to spindle fit
          
   
   

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  1. #1
    Randall's Avatar
    Randall is offline CHR Member Visit my Photo Gallery
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    King pin to spindle fit

     



    How tight should the king pins fit into the spindle? I was able to get one side mounted, although the spindle seems a little stiff to turn. The other side will not fit through the spindle at all.

    I am thinking I may need to have the bushings reamed, they were installed in the spindles I bought, and I assumed they were ready to install.

    How much clearance should there be?
    Jason

  2. #2
    Itoldyouso's Avatar
    Itoldyouso is offline CHR Member Visit my Photo Gallery
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    It is a honed fit. Take them to a machine shop with the new kingpins and they will ream them to the proper size, usually about $ 20- $ 50. When you press them in they have to be finished off this way to fit.


    Don

  3. #3
    ecdperf is offline CHR Member Visit my Photo Gallery
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    WE ream the spindle bushings .002 over the kingpin size.It is a job for a qualified shop with the correct equiptment.Frank @ ECD Performance

  4. #4
    DennyW is offline CHR Member Visit my Photo Gallery
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    DO NOT use sandpaper or abrasives to clean the
    spindle and axle bores. The use of abrasives will
    remove excessive material, causing a loose kingpin
    fit and premature wear.
    Thoroughly clean and inspect the spindle
    assembly. Replace the spindle if any damage is noted.
    2. Inspect the spindle kingpin bushing bores. The bores
    should be free of pitting, rust, scoring or cracks. Light
    rust or pitts can be removed using a brake hone. Replace
    the spindle(s) as needed.
    3. Inspect the axle kingpin bore. The
    bores should be free of pitting, rust, scoring, cracks, or
    worn out-of-round. Replace the axle if any damage is
    noted.
    Apply anti-seize compound to the axle kingpin bore,
    and insert the new (replacement) king pin, into the
    axle to check the fit. The king pin should be a hard
    hand-push fit, and should not have any play.
    If any play is noted, an oversize kingpins and bushings
    must be used, and the axle bore must be reamed to fit
    the new king pin.
    NOTE: If proper equipment is available, the axle may be
    reamed while the axle is still installed on the vehicle.
    If not, remove the axle, and have it reamed
    to match the oversize kingpin at a machine shop.
    Up and down play (between the spindle and axle) should not exceed .006, if so, add shims.
    IMPORTANT!
    When installing the bushings, it is important that the grease
    channels are aligned with the grease fittings. Installing
    the bushing incorrectly will result in premature kingpin and
    bushing wear.
    1. Install new grease fittings into spindle.
    2. Apply a light coat of wheel bearing grease to the new
    bushings, and install bushings, aligning the grease
    channels in the bushing with the grease fittings.

  5. #5
    Dave Severson is offline CHR Member/Contributor Visit my Photo Gallery
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    Quote Originally Posted by ecdperf
    WE ream the spindle bushings .002 over the kingpin size.It is a job for a qualified shop with the correct equiptment.Frank @ ECD Performance
    If the bushings are .002 over the king pin size, that must be a really tight fit!!! I use sintered bronze bushings and fit things a bit looser.....
    Yesterday is history, tomorrow is a mystery, Live for Today!
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  6. #6
    Aster's Avatar
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    I bought a kingpin set to install in my original 37 spindles, took the whole thing to a good machine shop and let them do the fitting. This shop is known to be expensive but I think their the best, and you get what you pay for. Cost was about $80.00. When I put them on, they fit perfect. Even though I have the equipment to do the job, I didn't want to take any chances. Dennyw is right about the fit, snug and you should never, ever force the kingpin. Good luck.

  7. #7
    jasonconnellee is offline CHR Member Visit my Photo Gallery
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    It's funny that I found this thread. We just replaced kingpins in three tractors here at the shop(International 9100's). The procedure that Denny described is PERFECT. We don't hone our spindles. Just polish them up. The fit should be a hard hand press. The pins we installed here we also had to install inner bushings. Top and bottom. Pressed in. One thing that I like to do is wipe down the kingpin with a very light oil. It helps to slide in the spindle. Other than being an 80,000 pound truck, sounds like an identical process.

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