volvo Workshop Repair Guides

Volvo Workshop Service and Repair Manuals

Vacuum Brake Booster|Service and Repair > < Power Brake Booster Overload Relay|Page 5733
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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.
Replace the power brake booster if the pedal feels hard and unresponsive when the engine is idling.
Replacing the power brake booster on left-hand drive cars. brake booster, replacing. 
Replacing on right-hand drive cars. brake booster, replacing.

Vacuum Brake Booster|Service and Repair > < Power Brake Booster Overload Relay|Page 5733