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King Pin assembly at workshop #378556
20/07/16 12:58 PM
20/07/16 12:58 PM
Joined: Dec 2011
Posts: 304
South West France
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CBY Offline OP
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Joined: Dec 2011
Posts: 304
South West France
Do you know if guenuine king pin diameter is 25mm (metric) or imperial 1 inch ?

How does Morgan deal with the king pin adjustment :

. the reaming is subcontracted and machined
or
. Morgan « hand » reams in its workshop adjusting each king pin assembly ?

During my visit at Malvern in october 2011 I saw only integrated front suspension.


Regards
2005 PLUS 4
Re: King Pin assembly at workshop [Re: CBY] #378561
20/07/16 01:16 PM
20/07/16 01:16 PM
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Posts: 1,036
United Kingdom
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The kingpin is 1" imperial.

It is reamed with an adjustable reamer. Do not attempt to ream with a fixed 1" reamer because the tubes that carry the bushes are welded to the subaxle forging and will always be slightly out of allignment. The bushes are supplied slightly undersize so that the adjustable reamer can accommodate the mis-alignment without having to go over-size.

Hope that this helps.

Re: King Pin assembly at workshop [Re: CBY] #378562
20/07/16 01:16 PM
20/07/16 01:16 PM
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Suffolk
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JohnV6
2006 Indigo Blue Roadster S1
2014 Brooklands Edition Roadster "Brookland's Belle"
Re: King Pin assembly at workshop [Re: CBY] #378591
20/07/16 02:44 PM
20/07/16 02:44 PM
Joined: Dec 2008
Posts: 18,790
South Yorkshire
DaveW Offline
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From memory the pins are now sorted in the machine shop behind M3w assembly. It's not included in tours.Jays will confirm.


DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) AR Plus 4
Re: King Pin assembly at workshop [Re: CBY] #379304
23/07/16 09:20 AM
23/07/16 09:20 AM
Joined: Dec 2011
Posts: 304
South West France
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CBY Offline OP
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Thank you all for these informations.

It will be better to ream the tubes just after welding and before inserting the bushes. Standard bushes could be used and replaced without needing an additional reaming.


Regards
2005 PLUS 4
Re: King Pin assembly at workshop [Re: CBY] #379352
23/07/16 04:33 PM
23/07/16 04:33 PM
Joined: Dec 2011
Posts: 1,943
Seattle, USA
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Button Offline
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Originally Posted By CBY
Thank you all for these informations.

It will be better to ream the tubes just after welding and before inserting the bushes. Standard bushes could be used and replaced without needing an additional reaming.


This method is used by a Canadian Morgan Owner. A machine shop hones/reams the stub axle for a loose fit. Loctite Bushing Retainer is used to hold the bushing. No reaming/honing of the bush. Heat is used to release the bushing when they are to be replaced. Not sure of the details of this.

Button
Seattle


Button
Re: King Pin assembly at workshop [Re: CBY] #379431
23/07/16 09:45 PM
23/07/16 09:45 PM
Joined: May 2012
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Originally Posted By Button
This method is used by a Canadian Morgan Owner. A machine shop hones/reams the stub axle for a loose fit. Loctite Bushing Retainer is used to hold the bushing. No reaming/honing of the bush. Heat is used to release the bushing when they are to be replaced. Not sure of the details of this.


That makes a lot of sense to me. With the conventional approach if there is any distortion along the tube axis the reamer may just follow the axial distortion resulting in having to over ream to achieve the correct sliding fit. This would result in a reduced life. With the Loctite method the bush/pin fit can be pre machined and the bushes allowed to float slightly on assembly (using the pins to align the bushes as the Loctite cures).


Roger
2011 Plus 4
Re: King Pin assembly at workshop [Re: CBY] #379438
23/07/16 10:18 PM
23/07/16 10:18 PM
Joined: Dec 2008
Posts: 18,790
South Yorkshire
DaveW Offline
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That's exactly right. The bushes fit the pins before pressing into the stubs. Once pressed in the bushes are distorted. It would make much more sense to ream the stubs before fitting the bushes.


DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) AR Plus 4

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