Crown Victoria V8-4.6L SOHC VIN 6 (1996)
Brake Bleeding: Service and Repair
Manual Bleeding
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Ensure all dirt and contaminants are removed from master cylinder area prior to removing reservoir cap.
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To prevent air from the pressure tank getting into the lines, do not shake the tank while air is being added to the tank or after it has been
pressurized. Set the tank in the required location, bring the air hose to the tank, and do not move it during the bleeding operation. The tank should
be kept at least one-third full.
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If air does get into the fluid, releasing the pressure will cause the bubbles to increase in size, rise to the top of the fluid, and escape. Pressure
should not be greater than about 35 psi. On vehicles equipped with plastic reservoirs, do not exceed 25 psi during bleeding pressure.
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When bleeding without pressure, open the bleed valve three-quarters of a turn, depress the pedal a full stroke, then allow the pedal to return slowly
to its released position. It is suggested that after the pedal has been depressed to the end of its stroke, the bleeder valve should be closed before the
start of the return stroke. Reduce the vacuum in the power unit to zero by pumping the brake pedal several times with the engine OFF before
starting to bleed the system. Pressure bleeding, of course, eliminates the need for pedal pumping.
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Discard drained or bled brake fluid. Care should be taken not to spill brake fluid, since this can damage the finish of the car. Flushing is essential if
there is water, mineral oil or other contaminants in the lines, and whenever new parts are installed in the hydraulic system. Fluid contamination is
usually indicated by swollen and deteriorated cups and other rubber parts.
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Bleeding is necessary on all four wheels if air has entered the system because of low fluid level, or the line or lines have been disconnected. If a
line is disconnected at any one wheel cylinder, that cylinder only need be bled. Of course, on brake reline jobs, bleeding is advisable to remove
any air or contaminants.
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Master cylinders equipped with bleeder valves should be bled first before the wheel cylinders are bled. In all cases where a master cylinder has
been overhauled, it must be bled. Where there is no bleeder valve, this can be done by leaving the lines loose, actuating the brake pedal to expel
the air and then tightening the lines.
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After overhauling a dual master cylinder, it is advisable to bleed the cylinder before installing it on the car. The reason for this recommendation is
that air may be trapped between the master cylinder pistons.