After Starting Engine; Engine Warm Up - Komatsu PC450-8 Operation & Maintenance Manual

OPERATION

AFTER STARTING ENGINE

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To stop the engine in emergencies or when the actua-
tion of the engine is abnormal or there is any other
trouble, turn the key in the starting switch to the OFF
position.
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Do not carry out operations or operate the levers or
pedal suddenly while the hydraulic oil is at low temper-
ature. Always carry out the warm-up operation for the
hydraulic equipment until the hydraulic oil tempera-
ture monitor displays the correct temperature.
(When the hydraulic oil temperature is low, the low
temperature display 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)
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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 the 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 hydrau-
lic equipment thoroughly ensures that the hydraulic oil is warmed up and that warm hydraulic oil circulates in all
the control circuits.)

Engine Warm Up

NOTICE
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Do not accelerate the engine suddenly until the warm-
up operation has been completed.
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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 at a mid-range speed.
After the engine starts, do not start operating the machine immediately. First, carry out the following operations
and checks.
WARNING
MACHINE OPERATIONS AND CONTROLS
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