Case CX490D, Operator'S Manual

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4 - OPERATING INSTRUCTIONS
Bringing the machine up to operating temperature
Before starting operation, the main systems of the machine should be warmed up to their normal operating tempera-
ture.
NOTE: The normal operating temperature for the hydraulic fluid is 50 – 80 °C ( 122 – 176 °F ) . This corresponds to
four segments lit on the hydraulic temperature gauge.
NOTE: The normal operating temperature for the engine coolant is 75 – 90 °C ( 167 – 194 °F ). This corresponds to
four segments lit on the coolant temperature gauge.
A warm-up procedure should be carried out in order to grant a proper and safe usage of the machine, and in order to
grant the best machine performance and fuel efficiency.
NOTICE: The warm-up of the machine is mandatory when operating in severe winter climates.
NOTICE: The warm-up of the machine prevents wear and severe damages to the engine, to the fuel system, to the
SCR system and to the hydraulic system.
NOTICE: The exhaust pipe becomes extremely hot while the engine is idling. Make sure that there is no flammable
material such as plants, dried grass, paper waste, oil and old tires close to the exhaust pipe before starting warm-up
procedure.
NOTICE: Never cover the grids of the radiators with flammable materials.
Automatic machine warm up
Regardless of the ambient conditions, the machine control system allows to carry out an automatic warm-up proce-
dure that brings the temperature of the main operating fluids to the proper level for machine operation.
Start the engine with the speed throttle in the low idle position and let the machine complete the automatic warm-up
procedure. During the automatic warm-up, the engine speed and the engine load are automatically managed in order
to match the warm-up cycle to the ambient conditions and to optimize the warm-up cycle in respect to the machine
operating parameters.
NOTE: the engine speed and the noise of the hydraulics are supposed to change during the warm-up cycle.
NOTICE: The automatic warm-up procedure is the recommended operating practice. However, the automatic
warm-up procedure can be overridden either by changing the engine speed manually or by operating any operation
lever.
As the procedure starts up, the message AUTO WARM UP is displayed:
The automatic warm-up procedure takes about 5 – 10 min depending on the ambient conditions.
After completion of the automatic warm-up procedure, the AUTO WARM UP message disappears, and the engine
speed gets back to low idle.
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