Conduct Cooling Operation Before Stopping The Engine; Protection Of The Engine Against Water Entry; Properly Maintain The Air Cleaner And Pre-Cleaner; Use Of Tools Optimum For Each Work - Mitsubishi S6B Operation & Maintenance Manual

Chapter 1 BASIC SAFETY PRECAUTIONS
Conduct cooling operation
before stopping the engine
Before stopping the engine, let it idle at low speed for
5 to 6 minutes to cool down.
Stopping the engine immediately after high-load oper-
ation will cause engine parts to heat up and shorten
the service life of the engine.
During cooling operation, check the engine for abnor-
malities.
Protection of the engine against
water entry
Do not allow rainwater, etc. to enter the engine
through the air inlet or exhaust openings.
Do not wash the engine while it is operating. Cleaning
fluid (water) can be sucked into the engine.
Starting the engine with water inside the combustion
chambers can cause the water hammer action which
may result in internal engine damage and serious
accidents.
Properly maintain the air
cleaner and pre-cleaner
The major cause of abnormal wear on engine parts is
dust from intake air. Worn parts produce many prob-
lems such as an increase of oil consumption,
decrease of output, and starting difficulties. For effec-
tive removal of dust from intake air, maintain the air
cleaner or pre-cleaner according to the following
instructions.
Do not maintain the air cleaner or pre-cleaner while
the engine is operating. Operating the engine without
the air cleaner can suck particles of foreign matter into
the engine and could result in serious accidents.
Remove the air cleaner/pre-cleaner slowly to prevent
dust accumulated on the element from falling off. After
removing the air cleaner or pre-cleaner, immediately
cover the opening (inlet port of air cleaner; port in
body for pre-cleaner) with plastic sheet or similar
means to prevent dust from entering the engine.
If the engine is equipped with a dust indicator, con-
duct maintenance when the clog warning sign ap-
pears.
1-8
Use of tools optimum for each
work
Always keep in mind to select most appropriate tools
for the work to be performed and use them correctly. If
tools are damaged, replace them with new tools.
Avoidance of prolonged time of
starter operation
Do not use the starter for more than 10 seconds at a
time. If the engine does not start, wait for at least 1
minute before cranking again.
Continuous operation of the starter will drain the bat-
tery power and cause the starter to seize.
Do not turn off the battery
switch during operation

Do not turn off the battery switch during operation.

If the battery switch is turned OFF when the engine is
running, not only various meters will stop working but
also the alternator may have its diode and transistor
deteriorated.
Cautionary instructions for
transporting the engine
When transporting the engine on a truck, consider the
engine weight, width and height to ensure safety.
Abide by road traffic law, road vehicles act, vehicle
restriction ordinance and other pertinent laws.
Do not operate engine continu-
ously under low load
When operating the engine with a 30 % of rated load
or lower, limit each operation to 10 minutes. Operating
the engine at low load tends to result in unburned fuel,
which can adhere on internal engine parts, and cause
malfunctions and shorten the engine service life.