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Positive thinking ...
We are still asking:
What did you
get done on
your Bolt today
????


The question, initially posted May 23, 2005, was:
"Whatcha do on your Bolt
this weekend?"

After 51,906,997 views, 7378 replies over 185 pages, this thread in General Truck Talk is a happening! And it's not just weekends anymore.


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and No BOTS.


So ...


What did you get done on your Bolt today????


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King Pins on a 1 ton
#1412287 Tue Jun 01 2021 09:25 PM
Joined: May 2011
Posts: 97
3
3800GUY Offline OP
'Bolter
Wanting to replace the King Pins on my 1950 Chevy 3800 series truck. I know the new bushings in the spindles should be reamed for alignment after there installed. I think the size on these is .923 that the bushings need to be reamed too. Are there reamers (of that size) available to do this? Where would someone get one? Thanks in advance!

Tom

Re: King Pins on a 1 ton
3800GUY #1412331 Wed Jun 02 2021 02:02 AM
Joined: Nov 2005
Posts: 6,056
3
3B Offline
'Bolter
Hy 3800GUY, both holes need to be reamed in the same plane, there were special long reamers for this job which also had a centering collet. If you could find one of these tools I think it would be very expensive. I think you should take your spindles to a machine shop along with your king pin and have them ream to fit, hope that helps.

Re: King Pins on a 1 ton
3800GUY #1412344 Wed Jun 02 2021 05:32 AM
Joined: May 2005
Posts: 9,185
G
.
Yes, have them done at a machine shop, usually the automotive type. They may either ream them or hone them, but the important part is both bushings/bores share the same centerline, so using a long hone or a piloted reamer.

Otherwise adjustable or fixed reamers are available if you really want to do it yourself.
look at "Long Pilot Adjustable Blade Reamers" or "Spiral King Bolt Reamers"
This link https://www.chadwickreamers.com/products.php


1951 GMC 250 in the Project Journals [stovebolt.com]
1948 Chevrolet 6400 [stovebolt.com] - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup [stovebolt.com]
---All pictures [picasaweb.google.com]---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-
Re: King Pins on a 1 ton
3800GUY #1412345 Wed Jun 02 2021 09:38 AM
Joined: May 2011
Posts: 97
3
3800GUY Offline OP
'Bolter
Thanks for the advice, and yes your probably right to have a shop do the work. I have tackled many projects on this truck over the years but this one might be worth the expense to have it done right. Would the axel need to go to the shop also to make sure everything fit together properly? I also have a 1946 3/4 ton Chevy which need new pins worse than the 1950, I think they might be the same size pins in both trucks. Maybe the shop would do them both for a little better price Ha Ha. I will keep the link you supplied for future reference.

Thanks,
Tom

Re: King Pins on a 1 ton
3800GUY #1412613 Fri Jun 04 2021 12:37 PM
Joined: Jun 2011
Posts: 4,454
E
'Bolter
If the axle location is not hogged out(technical term) no need to take the axle. Just the new king pins and the spindle.

Ed


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
Re: King Pins on a 1 ton
3800GUY #1413058 Tue Jun 08 2021 02:56 AM
Joined: May 2005
Posts: 9,185
G
.
If you can't easily remove the old kingpins then best to remove the whole axle and have it pressed apart. (or use a portable kingpin press in place if you have one) Swinging a big sledge hammer trying to remove kingpins can bend the axle.

If the new pins fit nice and snug in the axle beam there is generally no machine work necessary, if not then you're looking at oversize kingpins and the axle needs to be reamed or honed also. They should be a snug fit, should not wobble at all, and should not fall out. Should need a firm push of you palm or a rubber mallet to get a new kingpin in or out of the axle.


1951 GMC 250 in the Project Journals [stovebolt.com]
1948 Chevrolet 6400 [stovebolt.com] - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup [stovebolt.com]
---All pictures [picasaweb.google.com]---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-

Moderated by  Grigg 

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