[6pack] starters, ring gears, etc

[Ruffner, James A *HS]

What was going on was that the six cylinder engine was first employed in the
TR-250 in the US and it was the TR-5 in Europe.  The 5 was fuel injected.
Both used the TR-4A body with the independent rear suspension.  Both of these
used the older style of starter motor which operated by pulling the pinion
gear into the starter ring from the clutch disk/transmission side.  When the
engine started, its RPM kicked the pinion back out of the ring gear.  Thus the
beveling of the ring gear was also on the transmission side.

With the introduction of the -6, the newer style of starter was employed,
which used a starter solenoid.  This uses a lever arm that has a fork that
engages the pinion on one end and and the other is hooked to the solenoid on
the other.  The lever pivots in order to drive the pinion into the teeth of
the ring gear.  The pinion is pretty much stationary relative to the ring gear
at this point so there is a minimum of teeth grinding upon starting.  One note
is that the ring gear has no initial beveling of its teeth because of this
design.  With the pinion coming from the engine side of the flywheel, older
design ring gears with the beveling installed towards the transmission side
would work just fine.  They likely just used all the older style ring/flywheel
designs in the newer cars.  Pretty typical in Europe.

According to the official TR-6 manual the ring gears were simply sweated onto
the flywheel.  There were no retaining bolts as was the case with the earlier
TRs.  The removal of a bad ring gear was accomplished by using a cold chisel
to split it.  A new one was then sweated on.
________________________________________
From: 6pack-bounces at autox.team.net [6pack-bounces at autox.team.net] On Behalf Of
oliver [sumton at sbcglobal.net]
Sent: Monday, October 17, 2011 4:31 PM
To: Triumph 6 Pack
Subject: Re: [6pack] starters, ring gears, etc

so if I have an original starter motor (HEAVY!!!) I should be able to put it
in and drive off???

then some point in the future pull the tranny and switch the ring gear
around?

--------------------------------------------------
From: "Sally or Dick Taylor" <tr6taylor at webtv.net>
Sent: Monday, October 17, 2011 1:29 PM
To: <JAR7U at hscmail.mcc.virginia.edu>; "oliver" <sumton at sbcglobal.net>;
"Triumph 6 Pack" <6pack at autox.team.net>
Subject: RE: [6pack] starters, ring gears, etc

> James---Years ago I had a converation with a tech guy at TRF. He told me
> that TRiumph left the bevel on the ring gear on the rear, even tho when
> developing the six, the starter gear now engaged from the front. From that
> I assumed that all the fours had a rear engaging starter. Sorry if I added
> to any confusion here. (Ted S. also gave me a heads up on this).
>
> Dick
>
>
> -----Original Message-----
> From: Ruffner, James A *HS
> Sent: Monday, October 17, 2011 6:23 AM
> To: Sally or Dick Taylor, oliver, Triumph 6 Pack
> Subject: RE: [6pack] starters, ring gears, etc
>
> If I understand you correctly in your first statement, you are referring
> to the "long shaft" or "long nose"  starters.  This was a design used in
> the TR-2s and some early TR-3s, not early 4s.
> ________________________________________
> From: 6pack-bounces at autox.team.net [6pack-bounces at autox.team.net] On
> Behalf Of Sally or Dick Taylor [tr6taylor at webtv.net]
> Sent: Monday, October 17, 2011 2:39 AM
> To: oliver; Triumph 6 Pack
> Subject: Re: [6pack] starters, ring gears, etc
>
> Oliver---Early four TRs had their starter motor gear engage the ring gear
> from the back forward. (Don't know the exact year this started or ended)
> All the sixes that I've come across in this area had their starter gears
> enter the ring gear from the front.
>
> When the factory built the sixes, the bevel on the ring gear was never
> changed to the front, as logic would dictate. But this bassackwards bevel
> worked on most of the TR6s without a problem.  If a ring gear has to be
> taken off for any reason, this would be a good time to turn it around.
> This ring gear is a heat-it-up-to-fit for installation. When the ring gear
> cools, it should never move due to starter motor engagement. (One would
> need to split it to take it from the flywheel).
>
> Dick
> '73

________________________________________

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