[Healeys] Trunnion nut

Michael Salter michaelsalter at gmail.com
Fri Apr 24 09:16:12 MDT 2015

Hi Fred,
I'm not quite sure which nut your are referring to but:
On the top of the king pin there is a "swivel nut" which when tightened
should allow 0.002" of vertical lift  of the swivel axle on the king pin.
This clearance is adjusted by using different thicknesses of "Staybrite"
There is no way to measure that "lift" directly with feeler gauges. I make
the adjustment by using progressively thicker washers until binding of the
swivel action is felt then replacing the washer pack with one about 0.002"
- 0.004" thinner.
Because the bearing area of the step on the king pin where the upper
trunnion  bears is very narrow tightening of the swivel nut can affect the
lift clearance. Also if the nut is over tightened the bearing face inside
the trunnion tends to crush and jam the trunnion on the king pin and of
course mess up the adjustment.
I have never seen a tightening torque quoted for the swivel nut but I use
50 lbs. ft as it seems that above that the "crushing" tends to occur.
Hope that helps.

Michael S
BN1 #174

On Fri, Apr 24, 2015 at 10:48 AM, Fred Wescoe <fredwescoe at gmail.com> wrote:

> I am assembling the fulcrum pins (king pins) on the front end of my BJ7.
> The manual says only "tighten the trunnion nut".  The book also says there
> should be .002" of play.  Where do I measure the play and is there a
> recommended torque for the trunnion nut?  I am hoping someone has done this
> and can guide me on this.
> Thanks,
> Fred
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*If you can't fix it with a hammer, you've got an electrical problem.*
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