[Fot] Triumph 4 speed O/D's and Layshaft bearing failures.

[Glenn Franco]

Ok, thanks for the clarification.

On Sun, Aug 11, 2019 at 8:37 PM Terry O’Beirne <tobeirne at skillpro.com.au>
wrote:

> the brass bush is just 1 way of fixing the problem being discussed. That
> bush can either be fixed like in the pic, or floating, depending on the
> intended use
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> *   for the taper roller conversion, I make up a ‘stub axle” that presses
> into the laygear and then the bearing sits on that. I use a common wheel
> bearing. part number shown on pic of case. I’ll dig thru my photo file.
> Same bearing/method used at input shaft end except I have a shim plate
> there to adjust end float/preload   Without wanting to sound rude, this is
> not a conversion for the average “back-yarder”. It requires considerable
> engineering skill and accurate machining, eg, the big holes bored in the
> case must be perfectly aligned and bore right thru from 1 end of case to
> the other.   I gave up doing them for other people as they just take too
> long and people did not want to pay the hourly rate       From: Glenn
> Franco <brakey6666 at gmail.com <brakey6666 at gmail.com>> Sent: 12 August 2019
> 09:46 To: Terry O’Beirne <tobeirne at skillpro.com.au
> <tobeirne at skillpro.com.au>> Cc: fubog1 <fubog1 at aol.com <fubog1 at aol.com>>;
> gblake58tr3 at icloud.com <gblake58tr3 at icloud.com>; britcars at bellsouth.net
> <britcars at bellsouth.net>; fot at autox.team.net <fot at autox.team.net> Subject:
> Re: [Fot] Triumph 4 speed O/D's and Layshaft bearing failures.   Very
> interesting!  Do you have a photo of the bearing install and do you use it
> with the bronze bush you installed in the Laygear? Thanks Glenn   On Sun,
> Aug 11, 2019 at 5:53 PM Terry O’Beirne <tobeirne at skillpro.com.au
> <tobeirne at skillpro.com.au>> wrote: In all my years of having a business
> fixing hundreds of these boxes , I don’t think I ever had to resort to a
> pulling device like shown   I really am gob-smacked at what some of you
> guys are doing to these boxes!!   I totally agree, the rear thrust washer
> can be a problem. but a hook pick and screwdriver can usually pull up the
> most recalcitrant of these. In extreme cases a tiny Dremel grinder can then
> be used to cut thru the thrust washer once its exposed a bit.   In the
> 1970’s we mounted a die grinder in the tool-post of the lathe and then used
> a grinding tool in that to remove the outer shell of the bearing and then
> regrind the laygear to accept a bigger bearing or a bush. Once that rear
> laygear bearing has started to fail, the laygear gets very hard and
> conventional lathe tooling wont work, even tipped tools can struggle to get
> thru the hard layer. Over the years, the tooling got a bit flasher but the
> idea never really changed. Doing it by hand can be a disaster, because if
> you leave a ‘groove’ or dent in the laygear housing, a replacement shell
> type bearing will never last.   You usually can’t perform this repair with
> the later open cage bearings as the laygear finish and hardness wont be
> good enough. Its perfectly OK for a LG3 type bronze bush however…see pic
> below   I also include a pic of a gearbox case bored out to accept a taper
> roller at 1st gear end. Have done it to both ends with shim adjustment at
> front. Done plenty of these   [image: A hand holding a piece of metal
> Description automatically generated]   [image: A picture containing ground,
> outdoor, transport Description automatically generated]             From:
> Fot <fot-bounces at autox.team.net <fot-bounces at autox.team.net>> On Behalf Of
> fubog1 via Fot Sent: 12 August 2019 03:49 To: gblake58tr3 at icloud.com
> <gblake58tr3 at icloud.com>; britcars at bellsouth.net <britcars at bellsouth.net>
> Cc: fot at autox.team.net <fot at autox.team.net>; brakey6666 at gmail.com
> <brakey6666 at gmail.com> Subject: Re: [Fot] Triumph 4 speed O/D's and
> Layshaft bearing failures.   HaHa that's pretty slick (insert thumbs-up)!
> Glen     -----Original Message----- From: Greg Blake
> <gblake58tr3 at icloud.com <gblake58tr3 at icloud.com>> To: barry rosenberg
> <britcars at bellsouth.net <britcars at bellsouth.net>> Cc: fubog1
> <fubog1 at aol.com <fubog1 at aol.com>>; FOT list <fot at autox.team.net
> <fot at autox.team.net>>; Glenn Franco <brakey6666 at gmail.com
> <brakey6666 at gmail.com>> Sent: Sun, Aug 11, 2019 1:26 pm Subject: Re: [Fot]
> Triumph 4 speed O/D's and Layshaft bearing failures. I had one stuck last
> year. This is the little pulled I made from 2 exhaust clamps and some all
> thread rod. Worked like a champ.      *
>
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