Brake Bleeding

[Largeowner]

I recently replaced the driver-side rear wheel cylinder on my 67 230 SL. Easy repair.....then, the surprise!  I am not able to bleed the brake line!  I have a one-man suction device bleeder, and barely one teaspoon of fluid comes through the lines (pumping the pedal or not)

I am a bit baffled by this because the pedal also fails to fall to the floor as I am used to.  I suspect a line blockage somewhere, but the flex hoses (most likely offender) appear to be nearly new.

BTW, does anyone know where I can locate a pivot post spring compressing clamp (part no. 180.589.01.37)?

Large

[waqas]

Do not be fooled by the outside appearance of the flexible hoses. Internally, they may be swollen to the point of total constriction. The only sure way to find out is to remove them and then see if your blockage persists.

My general rule of thumb on old flex hoses is to replace them if their age is unknown.

[Largeowner]

Thanks Waqas.  I will pull them tomorrow and take a peek.

Large

[Cees Klumper]

Waqas is quite right - and I also found that the bleed screw on the brake cylinder may take quite some turning out before they'll let the brake fluid pass through properly, so you may want to try turning it out a bit more as well.