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3.4 OPERATIONS AFTER STARTING ENGINE
Never refuel (diesel oil) while the engine is in operation.
Always stop the engine when refueling.
• To stop the engine in emergencies or when the actuation of the engine is abnormal or there is
any other trouble, turn the key in the starter switch to the OFF position.
• Do not carry out operations or operate the control levers or pedals suddenly while the
hydraulic oil is at low temperature. Always carry out the warm-up operation for the hydraulic
equipment until the hydraulic oil temperature monitor displays the correct temperature.
When the hydraulic oil temperature is low, the low
temperature displays the shown on the right is given.
• (A) Display when temperature is correct: Monitor back-
ground (C) is blue.
• (B) Display when temperature is low: Monitor back-
ground (C) is white.
• If the warm-up operation for the hydraulic equipment is
not carried out thoroughly, and the machine is moved,
the reaction of the control levers and pedals will be slow
and the movement may not be what the operator
intended. Always warm-up the hydraulic equipment. In
particular, in cold areas, always warm-up the hydraulic
equipment thoroughly.
There are two types of warm-up operation: warm up the engine and warm up the hydraulic equipment. In
addition, depending on the environment, the method of carrying out the warm-up operation may differ, so
carry out the warm-up operation according to the items given in the appropriate section.
When only engine is warmed up, the hydraulic equipment is not warmed up, so always carry out the
warm-up operation for the hydraulic equipment separately from the warm-up operation for the engine.
Warm up the hydraulic equipment thoroughly ensures that the hydraulic oil is warmed up and that warm
hydraulic oil circulates in all the control circuit.
3.4.1 ENGINE WARM-UP
• Do not accelerate the engine suddenly until the warm-up operation has completed.
• Do not run the engine at low idling or high idling under no load for more than 20 minutes. This
will have an adverse effect on the environment, and will also have an adverse effect on the
internal structure of the engine. If it is necessary to run the engine at idling for more than 20
minutes, apply a load from time to time or run a mid-range speed.
This machine is equipped with an automatic engine warm-up system, so if the engine water
temperatureis below 30 degrees C after the engine is started, the engine warm-up operation starts
automatically. When the engine automatic warm-up operation starts, the engine speed is maintained at
a speed higher than the normal low idling speed.
If the engine water temperature goes above 30 degrees C or if the warm-up operation has been
continued for more than 10 minutes, the automatic warm-up operation is cancelled and the engine
speed drops to the normal low idling speed.
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