Porsche 911 TURBO - 1975 WORSHOP, Руководство пользователя

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Practical Tips, Minor Repairs
215
Charge state
A well-charged battery prevents starting problems
and has a longer service life.
Traffic density, speed limits, requirements
regarding noise, exhaust gas and fuel consump-
tion reduce the engine speed and, hence, the
generator output.
However, the large number of electrical loads has
markedly increased the demand for electrical
power.
In order to avoid unintended battery
discharge:
f
Switch off unnecessary electrical loads in city
traffic, on short trips and in queues.
f Always withdraw the ignition key when leaving
the vehicle.
f Avoid frequent operation of the convertible top
and operation of the Porsche Communication
Management system when the engine is not
running.
Battery care
f
Keep battery surface clean and dry.
f Ensure that cell plugs and terminal clamps are
firmly secured.
Checking acid level
The acid level should be checked more frequently
by a qualified specialist workshop during the
summer months and in predominantly warm
countries.
Charging the battery
Your Porsche partner will be pleased to advise you
about a suitable charger.
1. Always observe the instructions of the charger
manufacturer.
Depending on the type of charger, the battery
may have to be disconnected. Important: in
this case,
disconnect the negative lead first, then the
positive lead - danger of short circuit!
Reconnection must be carried out in reverse
order.
2. Before charging, cold batteries must be
warmed up indoors.
3. Frozen batteries must not be charged. They
must be replaced with a new battery.
4. When charging, ensure that there is adequate
ventilation.
5. Connect the charger to the battery.
Only plug into the mains and switch the
charger on when it has been correctly
connected up.
Winter driving
The capacity and ability of the battery to store
power decreases at low outside temperatures.
Moreover, the battery is more heavily loaded in the
winter months by the heated rear window, more
frequent use of additional lights, the blower and
the windscreen wipers, etc.
f Have the battery checked before the start of
winter.
Keep the battery fully charged to prevent it from
freezing.
A discharged battery can freeze even at –5 °C
(23 °F), but a fully charged one freezes only at
–40 °C (–40 °F).