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spindle king pin bushing installation
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tlfrantz
Posted 2014-01-20 12:01 AM (#423007)
Subject: spindle king pin bushing installation


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Posts: 68
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Guys,

I there a trick I'm missing to installing these lower king pin bushings in the spindles? I've ruined two so far, even though I made a good tool with a good fit and it piloted into the other bushing, so I feel the alignment is good…seems like they're tight as the devil going in. My press shows 5-7 tons of force as the bushing goes partway in and then ruins.

I there a source where I can buy the bushings alone? I've had to buy another king pin kit just to replace the two bushings I ruined. I'm afraid I'm going to ruin the next pair. I'm thinking on this next go round I'm going to put the spindles in an oven and the bushings on dry ice over night.

Tommy
Salem, VA
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tlfrantz
Posted 2014-01-20 12:02 AM (#423008 - in reply to #423007)
Subject: Re: spindle king pin bushing installation


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Posts: 68
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PS---Its a 56 Fury I'm working on.
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58coupe
Posted 2014-01-20 9:20 AM (#423037 - in reply to #423007)
Subject: Re: spindle king pin bushing installation



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Location: Alaska
carefully measure the inside diameter of the spindle and the outside of the new bushing. There should only be a difference of .002-.003 thousandths of an inch (this is called an interference fit). Maybe someone is selling you the wrong kit. you could try heating the spindle and cooling the bushing as you stated.
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57chizler
Posted 2014-01-20 2:32 PM (#423076 - in reply to #423007)
Subject: RE: spindle king pin bushing installation



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tlfrantz - 2014-01-19 9:01 PM

My press shows 5-7 tons of force as the bushing goes partway in and then ruins.


How is it "ruined"?
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tlfrantz
Posted 2014-01-20 3:02 PM (#423082 - in reply to #423076)
Subject: RE: spindle king pin bushing installation


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My tool spread out the end of the bushing, ruining it. The first tool was made of aluminum, but the next one will be made of steel.
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300XMAN
Posted 2014-12-17 10:20 AM (#464942 - in reply to #423007)
Subject: Re: spindle king pin bushing installation


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This thread caused my near 80 year old father to nearly pass out. He has over 60 years of experience working on cars and he can tell you that the first rule when working with forged steel steering/suspension components is never to put heat to them--ever. On automotive applications, any forged steel component is created through a process known as hot forging. The hot forging process is a form of heat treating, as well. Whenever you put heat to a forged steel part or component, you compromise the heat treating originally done to the metal. The worst case scenario from heating forged steel components is catastrophic failure of the parts. DO NOT EVER HEAT FORGED STEEL AUTOMOTIVE COMPONENTS! Only use mechanical means to get things apart, no matter how difficult it is to do so. Period.
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wizard
Posted 2014-12-17 11:22 AM (#464946 - in reply to #423007)
Subject: Re: spindle king pin bushing installation



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The bushings has an oversize of .001 to .002". The pilot guide must be formed so it covers the whole inside diameter lenght, with larger "head" that does the actual press in work. Care should be taken so that the inside diameter of the pilot is lesser thanthe imaginary inner diameter easure of the bushing (after that it's pressed in). With the proper pilot and the proper diameter of the bushing, it will be easy to press inthe busing with a good wise. Mind that there are two different lenght of the bushings (shorter ones is mounted in the upper position)
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DepsilonD
Posted 2014-12-17 1:15 PM (#464957 - in reply to #423007)
Subject: Re: spindle king pin bushing installation



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Having done this (well my buddies that run a machine shop) to two 1956 Mopars, I have a couple questions for you. Where are you getting kits from? And I assume you are crushing the brass bushing? But the roller bearings are going in just fine? I ask for several reasons, one of which being that I may have an extra set of bushings, depending on which ones you need.

Wizard is on the money with his response. I know my shop crushed one of the bushings when they did the first set but machined me up a replacement. They made a new pilot tool when they did the second set and everything worked out great.

How are you planning to ream the bushing to size?

David
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wizard
Posted 2014-12-18 6:49 AM (#465058 - in reply to #423007)
Subject: Re: spindle king pin bushing installation



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Location: Southern Sweden - Sturkö island
Here is a picture of the pilot, I made my one out of aluminum and it works ok. the outer diameter of the part that goes inside the bronze bushing is .778 - .779". (for a king pin OD of 0,797")
Please check carefully if there are any "warts" inside the bore - sometimes there are buildups of shaved off material inside the bores and that will destroy the bushing and/or the needle bearing.

Of course the old man with 60 years experience is right; No heat ever to any front suspension parts

Edited by wizard 2014-12-18 6:53 AM




(Resize of IMG_9943.JPG)



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