Brake fluid: how much is required

[jackb_ms]

Hello All

I'm going to change the brake fluid.

Is there a guide on how much is required to flush the system?

Cheers

Jack

[Jonathan Kay]

500 mL. Or 750 mL.

Jonathan

[Martin7H]

Jack

I syringe the contents of the reservoir out and then use a litre of fluid and pressure bleed all four corners. Frequency every two years. 

[SM25T]

Start the bleeding at the wheel furthest from the master cylinder. Look for the change in colour in the fluid in the bleed hose.

[jackb_ms]

Thank for that gentlemen.

Jack

[Jonathan Kay]

Jack: There's a positive pressure kit and a valved nipple thing doing nothing in Garsington. Let me know if you'd like to borrow them.

Jonathan

[jackb_ms]

Hi Jonathan

thank you for your kind the offer, I have a Easy bleed kit

Cheers

Jack

[Paul Deslandes]

Common advice is only to use the easibleed to pressurise the system and not as a reservoir for fluid as they can and do leak.  Just keep the brake reservoir topped up during the procedure.

And don't be tempted to blow all the old fluid out before adding new as it'll take forever to fully bleed it again .  Just keep adding fresh fluid until any cloudy or mucky fluid stops coming out at each cylinder.

Paul

[elie boone]

I always blow the old fluid out first and then bleed the brakes, i use a compressor and an old filler cap with a hole drilled in it. It takes about 1,5h from start to finish single handed.

[7 wonders of the world]

As mentioned before empty the old fluid from the reservoir with a syringe, refill with new fluid and bleed through, 

[elie boone]

Just replaced a Girling mastercil for a AP master cil ( not the big one ) you do need a 5mm thick spacer as the hole need to be 35mm and the hole in the pedalbox is only 32 on an Imperial chassis. All the rest is ok, took me about 2h and between 500ml and 750ml didn't really measured.

[aerobod - near CYYC]

If bleeding the clutch at the same time as the brakes, I normally purchase 2x500ml to have enough for the job. As I use Motul RBF600 fluid, it is a very hygroscopic compared with most brake fluid in exchange for it’s 315°C (600°F) boiling point, so I bleed brake and clutch systems every year.