Voyager V6-201 3.3L VIN R SMFI (1997)
Brake Master Cylinder: Service Precautions
CAUTION:
1. When clamping master cylinder in vise, only clamp master cylinder by its mounting flange, do not clamp on primary piston, seal/boot or body of
master cylinder.
2. Vehicle which are equipped with the optional traction control system use a unique master cylinder. Vehicles equipped with traction control use a
center port master cylinder. Vehicle which are not equipped with traction control use a compensating port master cylinder. Be sure to verify if the
vehicle is equipped with traction control and that the correct replacement master cylinder is used.
3. Vacuum in the power brake booster must be pumped down (removed) before removing master cylinder from power brake booster. This is
necessary to prevent the power brake booster from sucking in any contamination as the master cylinder is removed. This can be done simply by
pumping the brake pedal, with the vehicle's engine not running, until a firm feeling brake pedal is achieved.
4. Before removing the master cylinder filler tube from the brake fluid reservoir, the filler tube, brake fluid reservoir and master cylinder must be
thoroughly cleaned. This must be done to prevent dirt particles from falling into the brake fluid reservoir and entering the brakes hydraulic system.
5. Before removing the master cylinder from the power brake vacuum booster, the master cylinder and vacuum booster must be thoroughly cleaned.
This must be done to prevent dirt particles from falling into the power brake vacuum booster.
6. The master cylinder is used to create the seal for holding vacuum in the power brake vacuum booster. The vacuum seal/boot on the master cylinder
MUST be replaced whenever the master cylinder is removed from the power brake vacuum booster.
NOTE: It is not necessary to bleed the ABS Hydraulic Control Unit (HCU) after replacing the master cylinder. However, the base brake hydraulic
system must be bled to ensure no air is entered the hydraulic system when the master cylinder was removed. See: Brake Bleeding/Service and Repair
