[TR] Scroll less seal fix

[Tony Drews]

Two options -

Looks like Bob needs a new crank (the break will NOT polish out), the 
new ARE / Marx / Viton / No machining required seal would be a great 
option if the replacement crank still has the scroll.

If the new crank has been machined for the older seal, those kits are 
available from Moss or British Parts Northwest.  BP Northwest also sells 
the bare seal if you already have the modified scroll "housing" aluminum 
bits - it's only like $10.

If the crank is undersize for that seal, you can carefully cut a little 
off of the parting line to close it up and make sure the spring is 8 
inches long (it can be shortened too).  The last few of those I bought 
already had the spring at 8 inches long.

Here's the bare seal for the "I machined off the scroll" seal setup:

https://www.bpnorthwest.com/triumph/tr2-tr3-tr4-tr4a/engine-gaskets-seals/rear-seal-for-rear-conversation-cna417k-cna418k.html 


Here's the complete kit for that setup:

https://www.bpnorthwest.com/triumph/tr2-tr3-tr4-tr4a/engine-gaskets-seals/rear-seal-conversion-kit-tr2-to-tr4a.html

Here's the complete kit for the "I'm not going to machine the scroll out 
of my crank" setup:

https://www.bpnorthwest.com/triumph/tr2-tr3-tr4-tr4a/engine-gaskets-seals/rear-seal-conversion-kit-uprated-tr3-to-tr4a.html

Here's just the seal for that setup if you already have the aluminum 
housing:

https://www.bpnorthwest.com/triumph/tr2-tr3-tr4-tr4a/engine-gaskets-seals/seal-rear-for-germany-conversion-kit-only.html

Cheers, Tony Drews

On 11/22/2020 8:05 AM, Geo Hahn wrote:
> Either I or others here do not understand Bob's problem.
>
> Sounds like he has a crank that has previously been machined (scroll 
> removed) and is looking for a seal that will work in spite of the 
> prior machining making the crank undersized due to incorrect instructions.
>
> Will the MadMarx seal work on such a crank? Maybe and worth checking 
> out, but seems unlikely to me.
>
> Sorry, I don't have an answer but hopefully can get the thinking on track.
>
> Geo
>
> On Sat, Nov 21, 2020, 8:39 AM Bob Nogueira <nogera at hotmail.com 
> <mailto:nogera at hotmail.com>> wrote:
>
>     Some time in the recent past I thought I read that Moss Motors was
>     offering a optional Rear seal for those of us who years ago
>     Machined off the scroll to use the “New” seal only to find out the
>     instructions had  the new surface too small.
>     I didn’t pay it much attention that crank was in the attic. Well
>     With the failure of my current crank I am now forced to use it or
>     find another crank.
>     Can’t find anything on Moss website. Anyone know about the
>     replacement seal?
>     Thanks
>
>
>     Bob Nogueira
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