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122 rear brake valves 120-130 1970

Hi all,
I am still battling to sort out this brake bleed problem that I have on a 122s
Amazon.

I have no fluid coming out of left rear wheel when bleeding.

I've decided to swap the rear brake proportioning valves around and when bleeding the opposite happens I.e no fluid comes out of right rear proving that there is a fault with the one brake valve.

I've disconnected the lines to the valves and blew through the valves and both are clear. This is confusing!

All lines have been cleaned, new rubber hoses, wheel cylinders, new master cylinder and H block in engine compartment swapped with a one that has been taken off a car that is working.

Apologies to bring this thread back.
I'd really appreciate all the help.

Is it simple to overhaul the rear brake valves?






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