Hydraulic Accumulator R & I: Removal
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 1990 Pontiac Bonneville, 1990 Oldsmobile Ninety-Eight, 1990 Oldsmobile Eighty-Eight, 1990 Cadillac Fleetwood, and 1990 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition off. Discharge brake system pressure. Remove hydraulic accumulator and "O" ring by turning accumulator. See Figure . Ensure no dirt particles fall into open port.