Wagoneer L6-258 4.2L VIN C 2-bbl (1982)
Brake Master Cylinder: Description and Operation
These vehicles use a dual master cylinder which has two outlet ports, two fluid reservoirs, and two hydraulic pistons which are operated in tandem by a
single pushrod. When the master cylinder fluid reservoirs are filled and the front and rear brake systems are purged of air, there is a solid column of fluid
on the forward side of both the primary and secondary pistons. During brake application, fluid is displaced by the master cylinder pistons into the front
calipers and rear wheel cylinders to activate the brakes. When the brakes are released, fluid returns from the calipers and wheel cylinders to the master
cylinder reservoirs.
