[Tigers] Lower fulcrum pin

[Jay Laifman]

... and never go near full lock when backing up.

On Thu, Aug 17, 2017 at 9:29 AM, Tom Witt via Tigers <tigers at autox.team.net>
wrote:

> Richard,
>   I never received the original email with your picture so I can’t comment
> to what it shows.  That said my understand is there are two points of
> failure. One at the point where the pin pinches in and the thickness
> narrows for the clamping bolts. The other is as Ron stated where the pin
> curves/tapers. Apparently not only a point of weakness, if the nuts work
> loose the curved washers rubs on the pin, work hardens them, and thus
> increases the likelihood of failure.  Last I knew the best fix is to
> purchase the non-rubber (Urethane???) bushings, remove the center steel
> insert and use a pin that much thicker. There are (at least were) a number
> of people who made the oversized pins.  Given the rarity of a Mark II and
> the associated value it might be money well spent to consider that upgrade.
>
> *From:* Ron Fraser via Tigers <tigers at autox.team.net>
> *Sent:* Wednesday, August 16, 2017 8:48 PM
> *To:* 'Richard' <rcsphx1 at cox.net> ; tigers at Autox.Team.Net
> *Subject:* Re: [Tigers] Lower fulcrum pin
>
>
> Richard
>
>                 My 1st guess would be that those marks are from a jack
> stand.  I’m not totally familiar with where the stress cracks occur but I
> believe they form where the square bar is turned to round.  Machining marks
> are generally where stress risers occur and a crack will start.
>
>
>
> Ron Fraser
>
>
>
> *From:* Tigers [mailto:tigers-bounces at autox.team.net] *On Behalf Of *Richard
> via Tigers
> *Sent:* Wednesday, August 16, 2017 8:42 PM
> *To:* Tiger List <tigers at autox.team.net>
> *Subject:* [Tigers] Lower fulcrum pin
>
>
>
> While cleaning under the Tiger today I noticed a mark on the center of
> the  left lower fulcrum pin.  After I sanded off the paint the marks in the
> attached picture appeared.  They are not as deep as they appear in the
> picture.  There a couple on the right side but not nearly  as much as on
> the left.  They kind of look like they were made by something  holding the
> pin at installation?  They don’t appear to be stress cracks, but knowing
> the history of fulcrum pins  failing, I would appreciate the expertise of
> the List.  The car is a 67 Tiger MKII, speedo showing 42000 miles, don’t
> know if they are original.
>
>
>
> Thanks
>
> Richard
>
>
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