Adjusting the pressure servo for the boost pressure control (BPC) valve

Fig 1: Adjusting Pressure Servo For Boost Pressure Control (BPC) Valve

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Adjust the push rod on the pressure servo for the boost pressure control (BPC) valve if the values deviate from the above values. See Checking the adjustment of the boost pressure control (BPC) valve 
• Reset the air pressure before each test/adjustment.

NOTE: The push rod must be mounted on the lever when the lock-nut is adjusted. The diaphragm in the pressure regulator will be damaged if the push rod is turned.

• Tighten the lock nut on the push rod. Tighten to 9 Nm. Do not damage the membrane.