LeSabre V6-181 3.0L (1986)
Hydraulic Control Assembly - Antilock Brakes: Description and Operation
The hydraulic accumulator stores fluid under high pressure. The booster uses this fluid to operate during both non-antilock and antilock braking. The
accumulator has a thick, flexible diaphragm inside it, which separates system fluid from nitrogen gas.
Nitrogen in the accumulator is pre-charged to approximately 6000 kPa (870 psi). During normal pump operation, the pump/motor assembly charges the
accumulator to an operating range of 13,790 - 17930 kPa (2000 - 2600 psi). For this reason it is extremely important that the recommended precautions
be followed when servicing the anti-lock brake system to prevent personal injury and/or damage to painted surfaces.
WARNING: The hydraulic accumulator contains brake fluid and nitrogen gas at extremely high pressures. Certain portions of the hydraulic
system also contain brake fluid at high pressure. When servicing components of the hydraulic system, always depressurize the hydraulic
accumulator.
