Zetor PROXIMA PLUS 90 2012 Operator's Manual page 11

SAFETY INSTRUCTIONS FOR THE USERS
ELECTRIC INSTALLATION
51. No additional modifications of elec-
tric installation of the tractor shall be car-
ried out (such as connection of other
electric appliances) due to its possible
overloading!
52. Values of electric installation:
Nominal voltage 12 V =
Grounded minus ( - ) pole
Use of starting trucks or other auxiliary
sources with a different voltage or polar-
ity may cause serious damages to the
tractor.
53. When manipulating with the battery
pay special attention and avoid short cir-
cuits. The tractors are equipped with a
battery disconnector that shall be
switched off before any manipulation
with the battery.
54. The tractors cannot be operated
with disconnected battery; this may
cause serious damages to the tractor.
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