Komatsu PC1250-11, Original Instructions Manual

Page: 224 / 452

METHOD FOR OPERATIONS AND CHECKS AFTER STARTING ENGINE
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WARNING
• If there is any trouble such as emergency stop, abnor-
mal actuation, etc., turn the starting switch key to OFF
position.
• Do not perform the operations nor operate the levers
or pedals abruptly while the hydraulic oil temperature
is low. Always perform the warm-up operation for the
hydraulic component until the hydraulic oil tempera-
ture caution lamp displays the correct temperature.
When the hydraulic oil temperature is low, the low
temperature display shown in the figure is given.
• Display (A): when temperature is correct: Caution
lamp background (C) is blue.
• Display (B): when temperature is low: Caution
lamp background (C) is white.
• Perform the warm-up operation for the hydraulic com-
ponent thoroughly. If the hydraulic component is not
warm enough, the reaction of the machine to the oper-
ation of the control levers and pedals is slow, and the
machine may not move as the operator intends. Partic-
ularly in a cold weather, perform the warm-up opera-
tion for the hydraulic component thoroughly.
• Keep away from the exhaust pipe while the engine is
running and immediately after stopping the engine. Do
not bring any combustible material close to the outlet
of the exhaust pipe.
There are 2 types of warm-up operation: warm-up of the engine and warm-up of the hydraulic component. In
addition, depending on the environment, the method of performing the warm-up operation may differ, so perform
the warm-up operation according to the descriptions given in the appropriate section.
The hydraulic component is not warmed by simply performing the warm-up operation for the engine. Perform
the warm-up operations for the hydraulic component separately from that for the engine. Make sure to perform
the warm-up operation for the hydraulic component, so that the hydraulic oil is also warmed up and it circulates
in all the control circuits.
METHOD FOR CHECKING STARTING CONDITION AND UNUSUAL NOISE OF
ENGINE
• When starting the engine, check that the engine causes no abnormal noise and that it starts up easily and
smoothly.
• Check that there is no abnormal noise when the engine is idling or when the engine speed rises slightly.
When there is an abnormal noise at the engine startup and if that condition continues, the engine may be dam-
aged. In that case, ask your Komatsu distributor to check the engine as soon as possible.
MACHINE OPERATIONS AND CONTROLS OPERATION
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