23-10-18, 11:47 AM
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Member
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Join Date: May 2008
Location: Melbourne, Australia
Posts: 1,174
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My view is one should begin by bleeding the system as one would do normally, without all the surplus paraphernalia. The brake pedal along with the brake boosters produce at least 1500 psi of hydraulic pressure through the brake lines - far more than any oil can; so if this doesn't force brake fluid through the bleed screws, you know you have a blockage somewhere. If you get fluid flow through the bleed screws, then you know the problem is something else.
Also, unless you have reason to believe someone has changed the braking system, the rear master cylinder, marked 'A' operates the front brakes and is connected to the upper vacuum booster. The front master cylinder marked 'B' operates the rear brakes via the lower booster. When bleeding the system it is advisable to do it with the engine running so that the vacuum boosters are operating.
Kevin
Last edited by Kevin H; 23-10-18 at 12:10 PM.
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