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Old 12-05-2009, 08:30 PM
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King Pin Questions

Previously I had posted in my journal that my king pins and spindles came apart with ease. Today I broke them down further removing the bushing inserts and measured everything up. The king pins themselves measure .811.

What is the free play tolerance suppose to be between the king pin and the bronze bushings? Also is there a site where I can by the new bushings, or should I just head down to the local bearing shop to buy the bushings.
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Old 12-05-2009, 09:28 PM
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king pins

King pins normally come in sets with new pins and bushings. After the bushings are pressed into the spindles they have to be reamed to the correct size. If you don't have the reamer or have never done this, it is a job for the machine shop. They will ream or hone the bushing to the correct fit to the pin.

Mark
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Old 12-05-2009, 09:33 PM
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As an old machinist. The rule of thumb for fit is a light push with thumb. Usually between .0005 to .001" Done on a Sunnen hone. The reamers tend to be a bit more loose.

Most of the old Ford stores have either bushing kits or king pin kits. Try Macs. or www.Speedwaymotors.com. Also has kits.
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Old 12-05-2009, 10:13 PM
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Quote:
Originally Posted by 39vortec
King pins normally come in sets with new pins and bushings. After the bushings are pressed into the spindles they have to be reamed to the correct size. If you don't have the reamer or have never done this, it is a job for the machine shop. They will ream or hone the bushing to the correct fit to the pin.

Mark
These are floating bushings. Their split and easily push in with only hand pressure. I pressed them out with a socket's and a vise. They came out with very little pressure. They have a steel backing with bronze sleeve. I don't think this type requires reaming.

Thank you.
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Old 12-05-2009, 10:15 PM
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Quote:
Originally Posted by BOBCRMAN@aol.com
As an old machinist. The rule of thumb for fit is a light push with thumb. Usually between .0005 to .001" Done on a Sunnen hone. The reamers tend to be a bit more loose.

Most of the old Ford stores have either bushing kits or king pin kits. Try Macs. or www.Speedwaymotors.com. Also has kits.
Thank you exactly what I needed to know.
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