Accumulator LEAKDOWN Test
- Start engine, and charge accumulator by either applying brake with 100 lbs. pedal force or turning steering wheel lock to lock.
- Turn off engine and wait 1 hour. There should be 1 reserve brake application with engine off.
- If reserve system will not retain a charge for 1 hour, but functions normally immediately following charging, or if accumulator can be heard charging and discharging but will not hold a charge, accumulator valves are at fault, replace power piston/accumulator.
NOTE:
If Hydro-Boost is not functioning, insure power steering system is operating normally before replacing Hydro-Boost unit.