I recall a remanufactured MC I got for the 123 was only about $40 from the FLAPS and was an easy swap except getting those fittings attached to the hard lines lined up to catch the threads on it was a bugger. Not a lot of slop in the hard lines to wiggle the fitting around. Then you have to do the whole bleeding thing which is Not Fun in my view.

--R



On 6/11/15 3:14 PM, Dan Penoff via Mercedes wrote:
Definitely master cylinder failure symptoms.  Fluid is leaking past the cups on 
the piston.

Dan


On Jun 11, 2015, at 2:36 PM, Randy Bennell via Mercedes <mercedes@okiebenz.com> 
wrote:

Winnipeg has rivers going north south - The Red and east west - The Assiniboine 
so I thought that sort of fit.

My good old 76 115 300D had a hiccup this morning, which is totally unlike it.

I was at a light when the car creeped ahead. I thought I had a senior moment 
and had failed to keep my foot firmly planted on the brake.
I stepped harder and it sat there for the duration of the  red light, but on 
the next block, I stepped on the brake pedal and it essentially sank to the 
floor. Not a good thing in traffic.
I drove it the few blocks home at lunch and put it back in the garage but 
something is wrong. It brakes but not very hard and pumping the pedal does not 
all that much to make it better.

It feels like when one presses on the pedal while another bleeds the brakes. It 
just slowly descends until close to the floor.

I have looked where it was parked and do not see any puddles of fluid.
The resevoir does not look to be down.

I shall have to look a bit closer to see if there is something leaking.

If not, then I suspect the master cylinder is leaking internally.

Anyone have a better conclusion based upon the symptoms?

If so, is there a kit to repair or am I compelled to replace the whole thing?
In either case, where would one best look for parts?

RB


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