V70 2.4 L5-2.4L VIN 61 B5244S (2001)
Check the function of the check valve.
Start the engine.
Remove the check valve from the power brake booster.
Check that there is a vacuum. Feel the check valve.
Reinstall the check valve.
Press the vacuum hose. Listen for a leak. Replace the rubber bushing if there is a leak.
Switch off the engine.
Note! Replace a defective check valve.
Check the function after replacing the check valve
Depress the brake pedal several times to so that it has no travel.
Hold the pedal down. Start the engine. The pedal should travel and feel softer.
Release the brake. switch off the engine. Wait 1 minute. Then depress the pedal. The pedal should still feel soft but should become stiffer when it is
depressed several times.
Replacing the vacuum hose
Remove the air cleaner (ACL) housing
See Brake pipe master cylinder / ABS unit, replacing See: Hydraulic System/Brake Hose/Line/Service and Repair/Brake Pipe Master Cylinder / ABS
Unit, Replacing.
Remove the check valve from the power brake booster. Remove the vacuum hose
