2010 XC60 T6 Brake Fluid Exchange Best Method

[Gravy68]

Gooday Fellas

Wondering if anyone has attempted this task and are there any precautions that I should be aware of.

Thanks in advance

[jimmy57]

suction out the reservoir of exisiting fluid and fill with new fluid.
Get a container that you can hang on suspension with a length of wire and a length of hose that will fit on bleeder screws and reach the bottom of container.
Take cap off bleeder and unscrew 1/4 turn and attach hose from container.
Depress brake pedal fully 15 times and then refill reservoir and pump 10 more times.
Repeat at each wheel. you will need three liters of brake fluid.
Fill reservoir the final time to max line with new brake pads all around or progressively lower depending on pad wear. If you put too much fluid in it will be expelled from cap vent when pads are changed.

[xHeart]

Curious –
How does the brake fluid level changes, from the new pads to worn pads, back to new pads.
It is either front or rear set, rarely all four.

[jimmy57]

As pads wear, the fluid quantity held in caliper goes up. When piston is deep in bore with new pads there is little fluid there and when pads are worn thin the calipers hold an additional 1-1.5 ounces each.
When the pistons are pushed back when pads are replaced then the fluid is displaced back into reservoir.

[Gravy68]

jimmy57

Many thanks for your advice.

[Gravy68]

Fellas

Did the task today without too much drama.

Syringed the brake fluid from the master cylinder reservoir, removed the bleed nipples from all 4 wheel slave cylinders and then purged the lines by applying air pressure to the reservoir fill point.

Had some difficulty bleeding the lines until I did the front disks first. That goes against the old convention that you bleed the longest line first.

Result was a good firm pedal.

[xHeart]

...
Had some difficulty bleeding the lines until I did the front disks first. That goes against the old convention that you bleed the longest line first.
...

I recently changed the front rotors and pads, but the fluid did not rise as i pressed the piston back in. Wondering!?

[jimmy57]

did you take careful note of level before?
with large reservoirs the level change is not great vertically.