RAM 2500 Truck 4WD V10-8.0L VIN W (1997)
Brake Master Cylinder: Description and Operation
With Antilock Brakes
Master Cylinder
GENERAL INFORMATION
All models are equipped with a two-section master cylinder assembly. Major components are the aluminum cylinder body and a removable plastic
reservoir. The primary and secondary pistons are located in the cylinder body. Grommets are used to secure and seal the reservoir in the cylinder
body. The reservoir cover is equipped with diaphragm seal and is a snap fit on the reservoir. The cylinder body is equipped with a quick take-up
valve located in the primary piston inlet port. The valve provides an extra volume of low pressure fluid during initial brake apply. Extra fluid
volume provides faster take-up of normal clearances in the calipers and wheel cylinders. The cylinder body, piston assemblies, reservoir,
grommets, seal and cover are all serviceable parts. The take-up valve is the only non-serviceable component. The valve is available only as part of
a complete cylinder body assembly.
The master cylinder in this model has a 31.8 mm (1.252 inch) bore.
NOTE: Master cylinders and reservoirs must not be interchanged. This will cause unsatisfactory operation and improper brake balance.
