Guidelines For Bleeding
When reconditioning or replacing brake calipers 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. A bleeding unit that can pressurize the brake system to 0.2-0.3 Mpa must be used.
NOTE:
Use only Volvo Genuine brake fluid (Volvo DOT 4+). Never
reuse brake fluid. Always keep brake fluid well sealed in its original packaging.