How hard is it to do King Pins? - Diesel Forum - TheDieselStop.com
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Old 07-25-2005, 12:00 PM   #1 (permalink)
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How hard is it to do King Pins?

Well, I went for my alignment, and low and behold the Left King pin has a lot of play. It is up and down movement, which I didn't realize until the guys showed me today.

How hard it it to replace the King Pins?

I was told that I should take the spindle to an axle shop and have them put in the bushings and make sure they fit right?

Anyone done these?

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Old 07-26-2005, 12:31 PM   #2 (permalink)
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Re: How hard is it to do King Pins?

Anyone?
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Old 07-26-2005, 12:50 PM   #3 (permalink)
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Re: How hard is it to do King Pins?

If you use nylon kingpin bushings, you can put it all together yourself. If you use the better bronze bushings, they need to be pressed in and reamed to the proper dimension of the kingpin (don't ask me why).

Although really, if all you have is up-and-down play, that's not really wear. Once your wheels are on the ground, that play is gone (gravity is wonderful).

You need to check your kingpins just like ball joints by checking for play horizontal to the ground.
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Old 07-26-2005, 12:58 PM   #4 (permalink)
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Re: How hard is it to do King Pins?

Use the bronze bushings, take the spindles and kingpins down to an automotive machine shop have the bushings pressed in and reamed doesn't cost all that much. If you buy the pins from the same place that installs them they may make you a deal to install the bushings if not for free. The rest of the job is pretty much just R&R.

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Old 07-26-2005, 01:46 PM   #5 (permalink)
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Re: How hard is it to do King Pins?

Yeah, I will get new tires first, and swap my power steering gear box and see how it feels. I think I will replce the king pins at some point, just not right now.
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Old 07-26-2005, 04:14 PM   #6 (permalink)
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Re: How hard is it to do King Pins?

i had same problem, all i did, went and got king pin kit at autozone(50$) pulled king pins out, put in new bearing and shims, then put old king pin back in. since the bushings had no play, no need to replace. the hard part was getting the king pins out. after than all went easy



that probly is your problem, the bearing is gone. look at the good side then the bad side. u will see it missing.
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Old 07-27-2005, 02:12 PM   #7 (permalink)
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Re: How hard is it to do King Pins?

Nearly every kingping I've had to repair has been a real PITA to get out. Hammers, tongs, torch, the pins frequently also require talking to God. In an earlier thread, somone mentioned that the F350s were somewhat easier than that.
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Old 07-27-2005, 02:48 PM   #8 (permalink)
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Re: How hard is it to do King Pins?

Yea just be glad that your kingpins are a little loose and not seizing up lol. My first truck they were actually soo bad that if the truck was idling and you went to turn the wheel that you could almost stall the motor from the work of the power steering pump. It took quite some time with torches and large hammers to enventually get them free. Had to heat up all around them to get it red hot and expand the area then Pound on the pins to get them to come out. After that I always made sure that I would get in there and put a little bit of greese to em every now and then.
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Old 07-27-2005, 02:58 PM   #9 (permalink)
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Re: How hard is it to do King Pins?

I was told they can be a pain to get out. I wil get a King Pin kit and have them handy for when I have a free weekend to get it apart.
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Old 07-27-2005, 03:45 PM   #10 (permalink)
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Re: How hard is it to do King Pins?

wish they made a nylon kit, it would be an easier job. the only nylon kits they make are for the lighter front axle found on the f100 and LD f150. these were .884" diameter. the HD f150 and all 250-350 used a 1.084" pin. besure who ever does the pressing and machining of the bushings uses a "Sunnen Honer" otherwise, they will likely never get the pins aligned right, and you will have either a camber or caster problem, or possibly both. that is if you can even get the pin in. i always sub mine out to a local machine shop. noway i would even try this at my shop. this is a delicate job that requires the best of machining tools..
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Old 07-27-2005, 06:51 PM   #11 (permalink)
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Re: How hard is it to do King Pins?

Yep, that Sunnen machine will do them true everytime, granted the operator does his/her job. We did all our work like this on an old sunnen. We mostly resized the big end on rods and put wrist pin bushings in and floated them with the sunned. Now that I don't do any machine work I miss that machine! [img]/ubbthreads/images/graemlins/smile.gif[/img]
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Old 07-27-2005, 10:06 PM   #12 (permalink)
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Re: How hard is it to do King Pins?

yeah, I will send them out to have done right. I thought about it and other have said to have a machine shop do it.
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Old 07-28-2005, 11:53 AM   #13 (permalink)
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Re: How hard is it to do King Pins?

I reamed my bushings out with a wood rasp until the kingpin went through. Granted I was 16, and had paid $175 for the truck. I don't recommend that method.
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Old 07-28-2005, 01:17 PM   #14 (permalink)
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Re: How hard is it to do King Pins?

I used to hand ream motorcycle rod bushings as well when I was young and STUPID. I am amazed that I never had a failure. Actaully, all the motors I built ran great. Some are still being raced many years later.
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