I've got an old 1960 Austin Princess with a separate master cylinder (under the chassis) and a reservoir tank under the bonnet.
I've tried to change the brake fluid as part of a standard service. Brakes were 100% before, but I've managed to get air into the system and I can't get rid of it.
I normally use a Sealey vacuum brake bleeder on the modern cars and it works great with them, so I tried in on this and somehow I've introduced air into the system.
Bleeding order is front o/s, front n/s, rear o/s rear n/s. No matter how long I suck the fluid out, small air bubbles remain in the fluid.
I've already cracked the seal on the master cylinder and break fluid came out, so the airlock isn't there. Any suggestions (apart from keep bleeding) on how to get rid of this "bleeding" airlock.
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