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Kingpin’s Lock pin (bolt) #1337982 Tue Dec 17 2019 12:34 AM
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roberts49chevy Offline OP
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Hi Members. Hopefully you can help. I’m doing a disc brake conversion on my ‘49 Chevy 1/2 ton pickup. In my haste to take apart the old brake system I inadvertently removed the lock pin that hold the kingpin. See photo attached. I realized I didn’t need to take out the lock pin to do the conversion. Subsequently I tried to reinsert the lock pin or bolt, and after hammering and hammering it just won’t go in. I ruined the pin and ordered a new one. Before I gone down the same road any suggestions on making the job easier. A photo is attached of the pin itself and it appears to be hitting the kingpin itself. It made a mess of the pin. Any help is appreciated. Thanks.

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FB1F7BDC-2A3D-44C0-BA79-A4A417E59154.jpeg (189.83 KB, 149 downloads)
Re: Kingpin’s Lock pin (bolt) [Re: roberts49chevy] #1338014 Tue Dec 17 2019 03:21 AM
Joined: Mar 2017
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LeeD Offline
Shop Shark
I would guess that maybe the kingpin moved and is no longer lined up correctly. I went through the same thing on the forward mount for my rear springs, it has the same type of lock pin. It can look perfect lined up, but just be off a little bit and it will not go in. If your new pin does not go in with just a few light taps, then pull it out and try realigning the king pin.

Lee.


1956 Chevy 3200, 235 w/3 speed
Re: Kingpin’s Lock pin (bolt) [Re: LeeD] #1338043 Tue Dec 17 2019 10:57 AM
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roberts49chevy Offline OP
Shop Shark
Thanks Lee.

Re: Kingpin’s Lock pin (bolt) [Re: roberts49chevy] #1338053 Tue Dec 17 2019 01:04 PM
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Phak1 Offline
Jack of all Trades, Master of None
Are you sure you inserted it from the correct side. It is installed front to back. It also appears that you now have a raised burr inside the hole. Take a small flat or square file to remove the burr, blow it out with compressed air, then it should slide in the majority of the way by hand, a few taps with a small hammer, then secure it with the nut. Good luck!


Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Kingpin’s Lock pin (bolt) [Re: roberts49chevy] #1338070 Tue Dec 17 2019 02:49 PM
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Pre '68 Dave Offline
Shop Shark
It looks like the kingpin has turned in the axle.
Try tapping a tapered punch in the hole and see if it will reposition the kingpin.


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Re: Kingpin’s Lock pin (bolt) [Re: roberts49chevy] #1338090 Tue Dec 17 2019 04:59 PM
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Wrenchbender Ret. Offline
Master Gabster
Move the spindle back & forth till you see the flat part on the king pin appear in the hole. It helps to line it up like Pre says with a long tapered punch.
George


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.

1956 Chevy 1/2-Ton Pickup

Re: Kingpin’s Lock pin (bolt) [Re: Phak1] #1338108 Tue Dec 17 2019 06:17 PM
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roberts49chevy Offline OP
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Thanks for help. Yes I did insert from front to back, but does it make a difference? Just wondering.

Re: Kingpin’s Lock pin (bolt) [Re: roberts49chevy] #1338139 Tue Dec 17 2019 09:35 PM
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Wrenchbender Ret. Offline
Master Gabster
It seems like they will fit either way but sometimes it might interfere with the spindle stop.


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.

1956 Chevy 1/2-Ton Pickup

Re: Kingpin’s Lock pin (bolt) [Re: roberts49chevy] #1338145 Tue Dec 17 2019 09:57 PM
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Phak1 Offline
Jack of all Trades, Master of None
I don’t know if it would work in either direction but the wheel stop is mounted on the back of the pin and is fastened by the lock washer and nut.

More than likely the flat spot on the king pin was not quite aligned and you just caught the edge. You should be able to slide the flat tapered side of the pin past the flat on the king pin by hand prior to tapping it into place.

Now that you know what to look for, I am sure that you will have sucess installing the new one. Good Luck!

Last edited by Phak1; Tue Dec 17 2019 09:58 PM.

Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Kingpin’s Lock pin (bolt) [Re: Phak1] #1338182 Wed Dec 18 2019 02:30 AM
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roberts49chevy Offline OP
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I all set. Thanks for your help!


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