Gday all, I have noticed the two recently purchased CX 2400's ('79 and '80 build) have an extra sphere near the pump. My earlier one does not.
I remember reading something about these, but didn't take mutch notice as it wasn't applicable to my car.
What does it do, and is it the same as any of the others?

It's commonly referred to as the "steering accumulator" ... which it isn't, it's a second brake accumulator required only on the early imported CX's due to the insane diagonal braking system forced upon us by the standards of the time.

It is critical you keep the two brake accumulators gas'd. If they ever get flat enough, the sphere membrane will rupture against the filler plug instantly filling the braking system with nitrogen (don't ask me how I know this !!).

All it means in reality is you have an extra sphere to upkeep for no good reason.

seeya,
Shane L.

to this day it still amazes me how you cit nuts look at these green things and call one a sphere yet another will be an accumulator

in my world of learning through all my years in hydraulic muck what you refer to all come under the one banner of accumulators

just because of it's shape doesn't really conjur up a name change for me

anyway back to it nutters

So, it doesn't really do anything much...

Yeah yeah... and they call me pedantic.

I appreciate that they are all in fact accumulators in that they collect pressurised hydraulic fluid, however as you know, in Citroen speak, an accumulator typically has no internal valving as it is attached to a valve of some sort, whereas, what we colloquially refer to as a sphere has valving in its neck to provide suspension control charactertics as per the specific design for that accumulative pressure reserving device.

Now go and buy yourself a new cardigan and pipe and grow a beard!

Mandatory atire for a RWD Pug driver

Cheers
Chris

yes it does. It supplies pressure when required for one half of the braking system. The sphere on the front lower cross member behind the radiator supplies the other half. It also relieves the demands placed upon the main accumulator sphere. This sphere is attached to the regulator valve and can be found in front of the gearbox. So all in all there are seven spheres on an Aussie spec C'Matic.
Cheers Gerry

Ahhh, so (Aussie)C-matic only

Yes the hydraulic pipe layout for Australian CX is quite different from those sold elsewhere in the world. The rest of the world got a front/rear split system but our ADRs dictated that we received a diagonal split i.e. left front and right rear/right front and left rear. It makes the pipe work much more complex and of course no one seems to have a schematic for this arrangement.
Recently I had to reinstall a set of pipes on my chassis. It was quite a jig saw seeing that they had been removed for approximately 9 years.
Cheers Gerry

ah the 'valve'

that would be a flow control for said accumulator

i'll go and get my cardi and pipe now