Komatsu PW118MR-11, Operation & Maintenance Manual, Page: 248 / 462

NOTICE
• Run the engine at idle for 15 seconds immediately after it has started. Do not operate the con-
trol levers or fuel control dial during this time.
• After the engine starts, wait for the engine oil
pressure caution lamp to go out. Do not touch the
control levers or control pedal while the engine oil
pressure monitor is lit.
• If the engine oil pressure caution lamp does not
go out in 4 to 5 seconds, stop the engine immedi-
ately. Check the oil level, check that there are no
oil leaks and take the appropriate measures.
TURBOCHARGER PROTECTION FUNCTION
The turbo protect function protects the turbocharger by keeping the engine speed at approximately 1100 rpm or
less immediately after the engine is started.
• When the turbo protect function is actuated, the engine speed is held at approximately 1100 rpm or less,
regardless of the position of the fuel control dial.
• When the turbo protect function is actuated, the engine speed is held at approximately 1100 rpm or less,
even if the fuel control dial is operated.
• When the turbo protect function is canceled, the engine speed is set to the speed for the position of the fuel
control dial.
• The actuation time of the turbo protect function is limited to 20 seconds.
METHOD FOR OPERATIONS AND CHECKS AFTER STARTING ENGINE
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WARNING
• If there has been any emergency stop, abnormal actuation or trouble, turn the starting switch key to
OFF position.
• Do not perform operations nor operate the levers or pedal abruptly while the hydraulic oil is at low
temperature. Always perform the warm-up operation for the hydraulic equipment until the hydraulic
oil temperature caution lamp displays the proper temperature.
• If the warm-up operation for the hydraulic equipment is not performed thoroughly, and the machine
is moved, the reaction of the machine to the operation of the control levers and pedals will be slow
and the movement of the machine may not be what the operator intended. Always warm up the hy-
draulic equipment thoroughly in particular in cold environment.
• Keep away from the exhaust pipe immediately while the engine is running and after stopping the
engine. Keep combustible materials away from the exhaust pipe outlet.
There are 2 types of warm-up operation: warm-up of the engine and warm-up of the hydraulic equipment. In
addition, depending on the environment, the method of performing the warm-up operation may differ. Perform
the warm-up operation according to the descriptions given in the appropriate section.
The hydraulic equipment is not warmed by simply performing engine warm-up operation. Perform the warm-up
operations for the hydraulic equipment and engine separately. Warm-up of the hydraulic equipment thoroughly
ensures that the hydraulic oil is warmed up and that warm hydraulic oil circulating 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.
MACHINE OPERATIONS AND CONTROLS OPERATION
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WENAM00130