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King pins

Posted: January 23rd, 2009, 9:18 am
by Robert Gray
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?

Re: King pins

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

Re: King pins

Posted: January 23rd, 2009, 11:31 pm
by spectria
John In NNY,

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

Thanks, from a wanna be expert-i-Fied

:lol:

Re: King pins

Posted: November 18th, 2018, 6:26 am
by s147881
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.

Re: King pins

Posted: November 18th, 2018, 8:01 am
by Bob C
I would take them to a machine shop and have them done on a Sunnen Hone.

Bob

Re: King pins

Posted: November 18th, 2018, 4:42 pm
by s147881
Not really interested in taking them to a machine shop. Still looking for information on the size!

Re: King pins

Posted: November 20th, 2018, 8:46 am
by Bob C
The pin should be 1.004"

Re: King pins

Posted: November 20th, 2018, 4:32 pm
by KimVanOrder
Yup! 1.004" pin + .002" clearance = 1.006" reamer.. There you figured it out!!

Re: King pins

Posted: November 25th, 2018, 1:20 pm
by s147881
Thanks

Re: King pins

Posted: January 8th, 2019, 3:09 pm
by njcar757
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