Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Sand? in the clutch master cylinder reservoir

Hello Dix,

my first idea was to rebuild the cylinder. But when I opened it I first noticed the demaged surface. Asking Keith (BHM) with some pictures by Mail and a German friend with a real look at it - no chance.

The next call with Keith we both think it would be good to have a look in the slave cylinder. Done. No flakes. So with some luck in this point only the master cylinder must be new.

I‘m affraid without this check after some time the whole system would be flushed and demaged by the flakes.

Greets René

Sadly it seems this same clutch master cylinder MBH0676 was used in all Classic production from at least 2006 onwards to the end, thankfully with the sole exception of the 3.7 Roadsters.

I think the ref nr changed but it's actually the same cylinder, they certainly come from the same mfr

That doesn't concur with the parts book Jon. There could be a simple explanation though like same master cylinder but with different linkage to pedal since part numbers include same.
.

Jon M & René - thank you for your inputs. The relevant issues will be passed to the shop. Actually the master cyl. failed (piston only went half way down I'm told)
What that has to do with the collapsed slave I still don' know

Here is the report from my clutch cylinders:
We replaced master and slave cylinder (35000 km).

The slave cylinder was full of metal behind the piston. The chips look to me like they do when machining cast iron. See image.
The housing is cast iron, the bore with no scoring and smooth as a child's bottom. The aluminum piston has no scratch, so it can't come from that.
I suspect it is residue from machining and was not washed out of the bores properly.

Slave cylinder is an original Mazda part "Made in Japan" Order no. at Mazda: NE55-41-92XA

The master cylinder is a Lockheed part which may have been adapted to the Morgan clutch pedal by Shiftec (Made in UK). LB16HC08M16

The master cylinder has no metal damage either, but the seals are gone. This cylinder was already replaced after 11000km on warranty

Learning: Carefully check both cylinders, when one of them was failing. Carefully check clutch fluid, Even when it looks crystal clear in the reservoir.. If you find magnetic parts there its too late.
Aus dem Nehmerzylinder by Werni Wehrli, auf Flickr


Nehmerzylinder gereinigt by Werni Wehrli, auf Flickr

Great work, same expierence as mine. And very well documented!

Only difference: my master cylinder was gone.

Greets René