Decoupler install to nondifflock

1
Hi group

I have some questions regarding installing a decoupler on a NON
Difflock Syncro.
Going through the motions of rebuilding my box and I have a lovely
little BJ Decoupler to install with it.

My questions are related to the vacuum side of the install. I have
already found the wire in the harness to plug onto the decoupler so
just need to hook up the light at the front.

However, the kit only came with one small t-piece, two rolls vacuum
line, one vacuum switch (dash), one vacuum servo (nose cone).

The Bentleys bible shows a system with no breather etc. whereas the
etka program shows breather, check valve etc.

I have already located and fitted a vacuum tank up under the body.

Has anyone in Australia installed a decoupler to a non difflock
syncro, such as a telecom van??

Do I have to fit the breather etc. or can I just cut into the vacuum
line to the front and purchase the correct size t-piece to run to
the vacuum tank?

Remember this vehicle has no difflocks so having to start from
scratch with everything.


Thanks
Andy
Travelling OZ, Stuck in Melbourne
2
--- In Syncro_T3_Australia@yahoogroups.com, "Andrew Keith & Melissa Roe"
<ossyncro@...> wrote:
>
> Hi group
>
> I have some questions regarding installing a decoupler on a NON
> Difflock Syncro.
>

Hi Andy,
Nick here,

We met at Pt Elliott SA when you were both travelling through on your way to Vic.

I installed an American decoupler (very similar to yours) in my ex Telecom syncro. The kit
came with a home made vacuum reservoir (PVC pipe,brass fittings and non return valve) as
well as all the other stuff. This is how mine was fitted.
Starting in the engine bay I spliced the T piece into the vacuum line between the underside
of the air box (black thing that divides the air flow to each cylinder) and the fuel pressure
regulator. This goes through a one way valve (to keep a constant vacuum in reservoir) and
into reservoir. A single line runs from the other end of my reservoir to the centre pin (I
think, contact me if verification neede) of the dash mounted vacuum switch. The switch
has 3 pins/hose connections as vacuum is needed to engage and disengage the
decoupler.Two lines are run back to the decoupler, one to engage and one to disengage.
There is no vent in my system, it is a closed system. If you get these two around the wrong
way it will disengage when you pull it out and engage when you push it in. The only
modification I made was to mount the switch to the right of the steering column on the
lower part of the dash as I have my uhf/ssb radios installed in the normal location point.I
also installed an orange LED (instead of the 12v light) in the warning light cluster in the
dash (there are several spare holes that can be used.) This way it is ver easy to see when it
is on. A bit fiddly soldering to the circuit board but looks good.


Nick.
3
Thanks Nick

Have worked out now that I just need one more T-piece and the check
valve and it will be all hunky dory!!!

The thing that concerned me was the breather in the etka drawing but I
have decided not to use it. I guess there are many ways to do it you
just have to pick one and go with it.

Hope your catching plenty of wind in your sails...


Andy
4
I think the breather maybe a safety valve to stop the actuator
sucking itself inside out. Does anyone know where it lives?


--- In Syncro_T3_Australia@yahoogroups.com, "Andrew Keith & Melissa
Roe" <ossyncro@...> wrote:
>
> Thanks Nick
>
> Have worked out now that I just need one more T-piece and the check
> valve and it will be all hunky dory!!!
>
> The thing that concerned me was the breather in the etka drawing
but I
> have decided not to use it. I guess there are many ways to do it
you
> just have to pick one and go with it.
>
> Hope your catching plenty of wind in your sails...
>
>
> Andy
>