[TR] Name that distributor (TR3)

[Art McEwen]

Thanks Randall,
 
Yes they sent me LU422318 according to the packaging.   It appears from britishvacuumunit.com that that part along with LU54413549 (moss 153-640) might work, although it's not clear from any of the photos if that terminal connector is meant to fit *over* the fork of LU421078 or *instead* of the fork.  
 
To further complicate things the internal contacts on my "up style" distributor cap are pretty crappy and I have a brand new sideways style unit I picked up somewhere, but that means new leads.  sigh....
 
Art
 
On 10/15/18, Randall <tr3driver at ca.rr.com> wrote:

>  40480D is an earlier model DM2P4 distributor.  The information I have handy
> says 40480F (which is functionally the same and still DM2P4, the letter is
> just a revision level) was used as late as 1959 TR3, some of which were sold
> in 1960.
> 
> That same database says cars built in 1960 got 40698A/B, which is still a
> DM2P4.
> 
> The Moss catalog is certainly misleading, as they show a drawing of the
> plate for a DM2P4, but the listing says it is for a 25D4.  They have no
> listing for the earlier part (which I assume means it is not available).  I
> believe the equivalent part number at TRF would be LU421078, which they have
> listed as NLA.  You might check with Revington, he seems to source a lot of
> parts the others can't find.
> 
> Faced with that same dilemma some years ago, I fabricated a mount for the
> low tension lead that worked quite well.  Just a stack of pieces of bare
> fiberglass printed circuit board (from the scrap bin, no copper plating),
> carved with a Dremel to fit snug but not too tight in the slot in the
> distributor cap.  A small bolt through the center linked the two wires.
> IIRC I used 3 pieces of PC board, one smaller to fit inside the notch and
> two slightly larger to fit on either side of the notch.  A little extra work
> to install the cap, as I had to hold the side wire to position the new piece
> in the slot, as I lowered the cap into place, but not too bad.
> 
> Later, I switched to a (used) 25D4 distributor.
> 
> -- Randall  
> 
> > -----Original Message-----
> > From: Triumphs [mailto:triumphs-bounces at autox.team.net] <triumphs-bounces at autox.team.net]> On 
> > Behalf Of Art McEwen
> > Sent: Sunday, October 14, 2018 7:19 PM
> > To: triumphs at autox.team.net
> > Subject: [TR] Name that distributor (TR3)
> > 
> >  Hi  
> > 
> > 
> > The backing plate on my TR3's distributor has a lot of play 
> > in it so timing is problematic.  I ordered a new one from 
> > Moss however that part (551-055) doesn't have the same tall 
> > attachment for the low tension lead leading outside the cap 
> > (see old unit on the left): 
> > https://www.dropbox.com/s/wzxo5gpd3tnuaei/IMG_20181014_1038057
> > 63.jpg?dl=0
> > 
> > 
> > The distributor is stamped 40480D (see below) which doesn't 
> > seem to be within the range of their 25D model matching (if I 
> > go down the electronic replacement match-up rabbit hole). 
> > https://www.dropbox.com/s/s1ghm1wradmp3xw/IMG_20181014_1047562
> > 91.jpg?dl=0
> > 
> > Do I have a non-standard distributor?  Any idea the right 
> > part # for my backing plate?   Or should I just bite the 
> > bullet and go electronic?
> > 
> > Thanks,
> > 
> > Art 
> > 1960 TR3A  TS64989LO 
> > 
> 
> 
> 
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