W123 master cylinder stuck?

sergiomoura

Active Member
Joined
Jun 20, 2021
Messages
31
Reaction score
4
Your Mercedes
W124 200d sportline
Hi there!

I am currently in the process of checking the brakes from my 300d that has been sitting for about 10 years.
I changed both front hoses and bleed the system and cleaned the calipers. They both are working fine (the right caliper was sticking before).
Moved to the rear brakes, and the right one is sticking badly. Changed hose and bleed system and it still sticks. I think I will buy two new calipers for the rear.
The reason I am creating this thread is that:

When bleeding the front brakes (using the pedal), i had no trouble. The pedal actually sometimes got to the floor (I know I shouldnt have done that).
Now that i am bleeding the rear, the pedal seems to stop at middle of its travel, like it had hit the floor before it hits it.

-> noob question: is this supposed to happen?

Thanks in advance for all the help...
 

rifiki

Senior Member
Joined
Dec 29, 2015
Messages
828
Reaction score
501
Location
Worksop
Your Mercedes
CLK W209 W121190B
It appears the calipers are in bad shape I think the master cylinder will be the same, change it.
 

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