Brakes - Porsche 928 ST1991 Owner's Manual

Parking brake lever (arrows)
Parking brake force is mechanically transfer-
red to the rear wheels by means of cables.
Use the parking brake only after the vehi-
cle has come to a full stop.
To set the parking brake
Pull the lever all the way up (see arrow). With
the ignition on, the brake warning light will
come on if the lever is even slightly raised. A
firm pull upward is required to properly en-
gage the parking brake.
28
To release the parking brake
Pull the lever slightly up as you depress the
release button. Keep the button depressed
as you lower the lever all the way down.
The parking brake light and the fault mes-
sage in the information system display will
go out after the engine is started and the
parking brake is fully released.
WARNING
• Release the parking brake fully. A par-
tially engaged brake will overheat the
rear brakes, reduce their effectiveness
and cause excessive wear.
• Always set the parking brake when park-
ing your car by pulling all the way up on
the lever. Move the selector lever to "P"
(Automatic transmission) or move the
gearshift lever to reverse or first gear
(Manual transmission). On hills also turn
the wheels toward the curb.
• The parking brake light is not an indi-
cator that the parking brake is fully set;
it is only intended to be a warning to re-
lease the parking brake before driving
the car. If brake is not fully set, the veh-
icle may roll without control.
B r a k e s
Functioning of brake system
Your Porsche is equipped with a power as-
sisted hydraulic dual circuit brake system
with disc brakes at the front and at the rear.
Both circuits function independently.
In the unlikely event of hydraulic failure of
one circuit, push the brake pedal down
firmly and hold it in that position. A
mechanical linkage activates the second
circuit, and you will be able to bring the
vehicle to a stop.
WARNING
Failure of one brake circuit will impair the
braking capability resulting in an increased
stopping distance.
If one brake circuit has failed, the other will
still operate, However, you will notice an in-
creased pedal travel when you step on the
brake. Should you encounter such experi-
ence, bring your vehicle safely to a full stop.
Avoid driving the vehicle and instead have
it towed to the nearest authorized Porsche
,
dealer.