Porsche 911 TURBO - 1975 WORSHOP, Руководство пользователя

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Controls, Safety, Instruments
Footbrake
Safety notes!
f Do not obstruct the pedal travel with floor mats
or other objects.
The brake booster is ready for operation only
while the engine is running. If the engine is
switched off or there is a defect in the brake
booster, much greater force has to be applied to
the pedal when braking. The ABS and PSM do not
operate if this is the case.
f Please observe the chapter “TOWING AND
TOW-STARTING” on page 231.
In heavy rain, while driving through water or after
leaving a car wash, the braking action may be
delayed and increased pressure may be required.
f For this reason, keep further back from the
vehicle in front and “dry” the brakes by
applying them at short intervals. Make sure
that following traffic is not affected.
After a long drive over salted or gritted roads, a
coating may form on the brake discs and pads
that significantly reduces friction and therefore
also braking effect.
f
Therefore, clean the brake discs and pads
approx. every 2 weeks with a strong jet of
water. The cleaning effect of automatic car
washes is insufficient.
To prevent corrosion of the brake discs, “brake
them dry” before parking the car (not on cars
with Porsche Ceramic Composite Brake).
f Even though the brake discs consist of alloyed
grey cast iron, they will unavoidably start to
corrode if your car is parked for an extended
period. The brakes will tend to “rub” as a
result.
The nature, extent and effects of corrosion
depend on the amount of time the vehicle was
parked, whether road salt or grit was spread
and whether grease-dissolving agents were
used in car washes (not on cars with Porsche
Ceramic Composite Brake).
If the braking comfort is noticeably impaired,
we recommend having the brake system
checked by experts. Consult a qualified
specialist workshop. We recommend a
Porsche partner for this work as they have
trained workshop personnel and the necessary
parts and tools.
f To relieve the braking system on downhill
stretches, change down to a lower gear in
good time to obtain engine braking.
If engine braking is insufficient on steep
stretches, operate the footbrake at intervals.
Continuous braking overheats the brakes and
reduces the braking effect.
f Please observe the chapter “BRAKE FLUID
LEVEL” on page 180.