Wagoneer L6-242 4.0L VIN M FI (1988)
Brake Master Cylinder: Description and Operation
Fig. 7 Master Cylinder/Power Booster
MASTER CYLINDER/POWER BOOSTER UNIT
The master cylinder and power booster pistons are located in a single, cast aluminum, cylinder body, under the hood on the driver side of the
vehicle. A fluid reservoir is attached to the body with rubber seals. The fluid reservoir is internally separated into three sections by bulkheads. A
common fluid fill is used for the three sections.
The power booster is a demand type component. Power assist occurs only when the brakes are applied. Power assist is from high pressure brake
fluid supplied by the electric motor driven booster pump. The pump is connected to the system accumulator. The accumulator is connected to the
booster unit in the master cylinder.
