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FOREWORD
Warm-up the Engine Before Use
After starting the engine, run the engine at a low idling
speed for 5 to 10 minutes for warming-up. Start the
work after this operation is completed.Warm-up opera-
tion circulates lubricant in the engine, and works for
the longer service life and economical operation.Do
not continue the warm-up operation for a longer time
than necessary.Long warm-up operation causes car-
bon deposits in the cylinders, and may lead to incom-
plete combustion.
Do Not Operate the Engine in an Over-
loaded Condition
If the engine shows an overloaded condition such as
black exhaust smoke, reduce the load immediately to
an appropriate load condition.Overloading causes not
only high fuel consumption but also excessive carbon
deposits inside the engine. Carbon deposits cause
various problems and will shorten the service life of the
engine.
Cool Down the Engine Before Stop
Cool down the engine at low idling for five to six min-
utes before stopping it.Stopping the engine immedi-
ately after high-load operation will cause local heat up
of engine parts and shorten the service life of the
engine.During the cooling operation, check the engine
for abnormalities.
Do Not Continue Low Load Operation
Low load continuous operation (less than 30%) must
be limited within one hour.Long warm-up operation
causes carbon deposits in the cylinders, and may lead
to incomplete combustion.Also, after low load opera-
tion for approx one hour, run the engine at a 30% or
higher load for five minutes or more.
Use Care to Protect Engine From Water
Use care to protect engine from water such as rain
entering through the air inlet or exhaust openings.Do
not wash the engine while it is running.Cleaning fluid
or water can be sucked into the engine.Starting the
engine with water inside the combustion chambers
can cause the water hammering, and may result in
engine inner parts damage and serious accident.
Air cleaner or
pre-cleaner is to be properly maintained.
With foreign material in the intake air, excessive wear
of the engine can result.Worn parts produce many
problems such as increase of oil consumption,
decrease of output and starting difficulties.For effec-
tive removal of dust from intake air, maintain the air
cleaner/pre-cleaner according to the following instruc-
tions.
Never perform maintenance of the air cleaner or pre-
cleaner during operation.Foreign material enters the
turbocharger and may result in a serious failure.
When removing the air cleaner or pre-cleaner, be
careful to prevent dust and foreign material collected
on the cleaner from entering the engine.After remov-
ing the air cleaner or pre-cleaner, immediately cover
the opening (inlet port of engine or turbocharger
silencer) with plastic sheet or similar means to pre-
vent foreign materials from entering the engine.
An air cleaner with a dust indicator gives an alarm
when it is clogged. Conduct maintenance when the
alarm is given.
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