QuestionI dont know if you can remember me. I was the one who ask you if you can tell me the step by step procedure on how to change my brake pads for my 2000 Volvo S80. Thanks to you, I did the brake job by myself successfully. However I forgot to ask you the procedure on how to flush or bleed the brakes? Do I really need a pressure bleeder? And by the way, where is the exact location of the bleed valve and do I need a special tool to open the bleed valve? Vedat you've been very helpful to me and again thank you very very very much...
joey :)
AnswerHello Joey,
Yes I can remember you. You need special tool, but I give you instructions you can do it without special tool.
I hope these are helpful for you...
Regards...
Brake system, bleeding
Note! Bleeding an ABS brake system takes longer than bleeding a normal brake system.
Guidelines for bleeding
When reconditioning or replacing brake callipers bleed the relevant brake pipe as follows.
The brake pedal must be depressed throughout the operation. This is so that the brake system is not drained of brake fluid.
If the braking system has been completely or partly drained, bleed the whole system.
Note! Use only Volvo Genuine Parts brake fluid (Volvo DOT 4+). Never reuse brake fluid. Always keep brake fluid in original pack and well sealed.
Preparations
Switch off the ignition.
Clean around the brake fluid reservoir filler cap.
Take out the container.
Remove the filler cap.
Fill the brake fluid reservoir completely.
Raise the car
Bleed left front wheel
Note! While bleeding, check that there is sufficient brake fluid in the reservoir. Top up if necessary.
Remove the protective cap from the bleed nipple. Connect the hose from the collection bottle.
Depress the brake pedal a few times. Maintain pressure.
Open the bleed nipple.
Depress the pedal fully. Keep it fully depressed for approximately 5 seconds. Release it again. Repeat this 3–5 times until there are no air bubbles in the fluid coming out of the hose.
Tighten the bleed nipple.
Remove the hose from the bleed nipple. Install the protective cap.
Continue bleeding the other wheels in the same way in the following order:
Right front wheel, left rear wheel and right rear wheel.
Checking for air in the brake system and for brake fluid leakage
Check if there is still air in the system. Press down the brake pedal using a jack at a pressure equivalent to heavy braking, 200 Nm. With the engine off and the brake pedal depressed 3–4 times, the pedal travel must not exceed 40–mm.
If the pedal travel exceeds this limit, bleed again and re-check the pedal travel.
Check that no leakage occurs from the brake nipples, hoses and joints.
Remove the bleed unit connector from the brake fluid reservoir.
Check that the brake fluid level is not above maximum.
