King pins

AA Ford Discussion Group relating to the repair and restoration of your AA Ford.
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Robert Gray
Posts: 102
Joined: May 8th, 2006, 4:03 pm
Model Year: 1930

King pins

Post by Robert Gray » January 23rd, 2009, 9:18 am

When installing new bushings and kingpins in an AA what size reamer should be used on the bushings? The A calls for .812 but aren't the AA pins larger than the A?

John - NNY
Posts: 119
Joined: October 1st, 2007, 6:38 pm
Model Year: 1930

Re: King pins

Post by John - NNY » January 23rd, 2009, 2:59 pm

I would start by measuring both pins top and bottom. They may be slightly different from one another. That would give you an idea of where abouts it should be. My guess is the bushing gets reamed .001-.002 larger than the pin. I am not a machinist so I suggest you get with someone more expertified.
John
NNY

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spectria
Posts: 1874
Joined: May 15th, 2008, 9:53 pm
Body Type: Mail Truck, Stakebed
Model Year: 1931
Location: Quincy, Ca.

Re: King pins

Post by spectria » January 23rd, 2009, 11:31 pm

John In NNY,

Can I steal that term... Expertified. Man I love That!!!

Thanks, from a wanna be expert-i-Fied

:lol:
Dave in Quincy, Ca. I love Pics!!!! Post them All!!! :)
Join the Ford Model AA Truck Club - membership form at http://www.fmaatc.org

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s147881
Posts: 379
Joined: April 13th, 2007, 8:09 pm
Body Type: stake bed 82A
Model Year: 1930
Location: Decatur Michigan

Re: King pins

Post by s147881 » November 18th, 2018, 6:26 am

Does anyone have actual reamer size for 30-31 aa truck. There are several on eBay that reference -
986 Pilot

1.006 Cut

1.003 Relief

11.75 long to square tip.

Bob C
Posts: 1256
Joined: April 24th, 2003, 11:50 am
Body Type: Mail truck, Stake tr
Model Year: 1931
Location: SO CAL

Re: King pins

Post by Bob C » November 18th, 2018, 8:01 am

I would take them to a machine shop and have them done on a Sunnen Hone.

Bob

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s147881
Posts: 379
Joined: April 13th, 2007, 8:09 pm
Body Type: stake bed 82A
Model Year: 1930
Location: Decatur Michigan

Re: King pins

Post by s147881 » November 18th, 2018, 4:42 pm

Not really interested in taking them to a machine shop. Still looking for information on the size!

Bob C
Posts: 1256
Joined: April 24th, 2003, 11:50 am
Body Type: Mail truck, Stake tr
Model Year: 1931
Location: SO CAL

Re: King pins

Post by Bob C » November 20th, 2018, 8:46 am

The pin should be 1.004"

KimVanOrder
Posts: 523
Joined: August 11th, 2013, 4:25 pm
Body Type: 82-A Platform
Model Year: 1928
Location: Hamilton, Mich.

Re: King pins

Post by KimVanOrder » November 20th, 2018, 4:32 pm

Yup! 1.004" pin + .002" clearance = 1.006" reamer.. There you figured it out!!
KVO
Dec. '28 AA

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s147881
Posts: 379
Joined: April 13th, 2007, 8:09 pm
Body Type: stake bed 82A
Model Year: 1930
Location: Decatur Michigan

Re: King pins

Post by s147881 » November 25th, 2018, 1:20 pm

Thanks

njcar757
Posts: 78
Joined: March 4th, 2009, 4:00 pm
Body Type: closed cab
Model Year: 1929

Re: King pins

Post by njcar757 » January 8th, 2019, 3:09 pm

28-29 AA had a front axle similar to the A, the difference would be the spindle and hub, the king pins were .812 up to oct. 1929, after that the front axle on the AA was heavier with bigger king pins, spindle and hubs. I would want only .001 clearance on king pin to bushing. If your on a budget, I would use a flap wheel on a drill.
carry on nick c

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