Bleeding the Rear Brake System (With Bleeding Unit)

Bleeding the rear brake system (with bleeding unit)

Note! Bleeding anABSbrake system takes longer than bleeding a normal brake system.

Guidelines for bleeding




When reconditioning or replacing brake calipers, it is generally sufficient to bleed the relevant brake line 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 must be used that can pressurize the brake system to 0.2-0.3 MPa (29.0 - 43.5 psi).

Note! Use only Volvo Genuine Parts brake fluid specification DOT 4+.Neverreuse brake fluid. Always keep brake fluid well sealed in its original packaging.

Preparations




Switch off the ignition.
Clean around the brake fluid reservoir filler cap.
Take out the special brake fluid collection bottle.

Connect the bleeding unit




Connect the bleeding unit to the brake fluid reservoir. Follow the manufacturer's instructions for connecting and using bleeding unit.
Pressurize the brake system. Check the connection to the brake fluid reservoir.
Depressurize the system after the check.

Raise the car and remove the wheels

Bleeding the left front wheel (right wheel on right-hand drive cars)




Remove the protective cap from the bleed nipple. Connect the hose from the collection bottle.
Open the bleed nipple. Close it when there are no more air bubbles in the fluid coming out.
Tighten the bleed nipple.
Remove the hose from the bleed nipple. Reinstall the protective cap.

Bleeding the other wheels
Continue bleeding according to above in the following order:
- right front wheel
- left rear wheel
- right rear wheel.
Check for any leakage from the bleed nipples.

Depressurize the brake system




Close the cock on the pressure line. Open a nipple and close it again.

Checking for air in the brake system and for brake fluid leakage
See Brake pipe master cylinder / ABS unit, replacing, B5254T2 Brake Pipe Master Cylinder / ABS Unit, Replacing.