1 SAFETY
Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL
64
Pub. No. 291Y1-40720 Revision: 5
Product-specific Precautions
Use of Chemicals
This engine uses fuel (diesel fuel), engine oil,
coolant (LLC), grease, and anti-corrosive agent.
If these come into contact with your eyes or skin,
they may cause skin burns or abnormal sight (sight
loss at the worst).
To prevent an accident, take measures given
below.
• When handling, wear proper personal protective
equipment.
(protective glasses, protective mask (gas mask),
plastic gloves)
• Wear working clothes with long sleeves and
trousers to protect the skin.
Surface Temperature
A surface of this engine during operation or
immediately after operation is raised to high
temperature (approx. 180°C [356°F]) by location,
and therefore if you touch it, you may get burns.
After making sure with the thermometer (thermo
gun, etc.) that a surface of the engine is cooled
down so that you can touch (approx. 40°C [104°F]),
conduct the inspection and maintenance work.
Precautions on Additional
Equipment
Water Heater
For generators for emergency use with a water
heater, be sure to follow the instructions below:
• The water heater is outside the scope
of our supply.
For the details, refer to the
corresponding manual of the generator.
• Always place the water heater switch in the ON
position to maintain the cooling water
temperature to the proper value (35°C [95°F] or
more).
• If you had to set the water heater switch to "OFF"
for inspection and maintenance, be sure to set
the switch back to "ON" after completing the
work.
Start up the engine only after the coolant
temperature reaches the proper temperature
(35°C [95°F] or more).
Do not touch the water heater even
after stopping of the engine.
* Even after stopping, water heater is at high
temperature and touching it may cause burns.
For the generator with a water heater,
connect the wiring of the water
heater correctly.
* Otherwise, flue explosion may occur, which
causes serious personal injury or damage to the
devices.
For the generator with a water heater,
always set the water heater switch to
"ON".
* If you start up the engine when the water heater
switch is "OFF", incomplete combustion may
occur, which results in flue explosion or
deterioration in the exhaust gas properties.