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OPERATION
3.7 ELECTRICAL EQUIPMENT IN CAB BASE
Components of Electrical Preheating System in
Cab Base (continued)
WARNING
Be sure to switch off main switch (2), (see page 161) and to
disconnect the power supply cable from external power
source before working on any part of the heating system.
Operating the Preheating System
Use the preheating system during stand-still periods e.g. over
night and low ambient temperatures.
The heating system should be energized as soon as the engines
are shut down. This allows the heating system to maintain the
desired temperature with minimum power usage.
The preheating systems for hydraulic oil and engine coolant are
equipped with additional control boxes with separate ON/OFF
switches. See following pages for more information.
Battery Charger (2)
Power supply to the battery charger is provided by the generator
set or an external power source connected to the 1X2 plug socket
at the cab stairway. The batteries of the shovel are charged by the
battery charger (2). The battery charger is switched ON and OFF
with main switch (4) and the switch on the front panel of the bat-
tery charger. For operating instructions refer to the separate
Users Manual "MASTERVOLT" battery charger filed in volume 2
binder.
153
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