E 450 V8-5.4L (2009)
Hydraulic Brake Booster: Service and Repair
Brake Booster - Hydro-Boost(R)
Removal and Installation
WARNING: Always carry the Hydro-Boost(R) assembly by the casting. The accumulator contains high-pressure nitrogen gas and may be
dangerous if dropped or impacted. Check the accumulator snap ring for correct seating prior to installation. Failure to follow these instructions
may result in serious personal injury.
WARNING: When disposing of the accumulator, do not expose it to incineration or open flame. Before discarding the accumulator, drill a 1.6
mm (0.06 in) diameter hole in the end of the accumulator can to relieve gas pressure. Failure to follow these instructions may result in serious
personal injury.
1. With the engine off, apply the brake pedal several times to deplete the brake booster accumulator reserve.
