Before servicing a hydraulic power booster system, you must ______.
A)disconnect the battery
B)drain the power steering reservoir
C)pump the brake pedal with the engine off until the pedal goes hard
D)open all four brake bleeders

Question

Quizplus · Accepted Answer

Pumping the brake pedal with the engine off until the pedal goes hard is necessary to relieve any stored pressure in the hydraulic system, ensuring safety during servicing.

Before Servicing a Hydraulic Power Booster System, You Must ______