RAM 2500 Van V8-318 5.2L VIN T Magnum CNG SFI (1997)
Brake Master Cylinder: Description and Operation
Fig 1 Aluminum Master Cylinder (Cut Away View)
A two-piece master cylinder is used on all models. The cylinder body containing the primary and secondary pistons is made of aluminum. The removable
fluid reservoir is made of nylon reinforced with glass fiber. The reservoir is the only serviceable component. The fluid compartments of the nylon
reservoir are interconnected to permit fluid level equalization. However, the equalization feature does not affect circuit separation in the event of a front
or rear brake malfunction. The reservoir compartments will retain enough fluid to operate the functioning hydraulic circuit. Care must be exercised when
removing/installing the master cylinder connecting lines. The threads in the cylinder fluid ports can be damaged if care is not exercised. Start all brake
line fittings by hand to avoid cross threading. The cylinder reservoir can be replaced when necessary. However, the aluminum body section of the master
cylinder is not a repairable component.
NOTE: If diagnosis indicates that an internal malfunction has occurred, the aluminum body section must be replaced as an assembly.
