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MG MGB Technical - Brake Master Cylinder

Has anyone out there, had a dual line master cylinder go bad only on one side (line). Am not getting fluid to the rear brakes. I have replaced the line from the master cylinder leading to the rear brakes, with a new one. I have replaced the rubber hoses in the rear. New rear wheel cylinders. I have disconnected the lines to the rear wheel cylinders and the under the car leading back to them. Took the air compressor and blew the lines out and clean. Connected the lines back up. Removed the low pressure switch. Still not getting any fluid to the rear. Please Help, Thanks Chuck
CDB Chuck


I vaguely remember that the shuttle valve will shut off either the front or rear if it is not centered.

C R Huff

This thread was discussed on 18/10/2012

MG MGB Technical index

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