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PRECAUTIONS FOR MAINTENANCE
PRECAUTIONS WITH HIGH-TEMPERATURE COOLANT
To prevent burns from boiling water or steam spurting out when
checking or draining the coolant, wait for the coolant to cool
down to a temperature where the radiator cap can be touched
by hand. Then loosen the cap slowly to release the pressure
inside the radiator, and remove the cap.
PRECAUTIONS WITH HIGH-TEMPERATURE OIL
To prevent burns from hot oil spurting out or from touching
high-temperature parts when checking or draining the oil, wait
for the oil to cool down to a temperature where the cap or plug
can be touched by hand. Then loosen the cap or plug slowly to
release the internal pressure and remove the cap or plug.
PRECAUTIONS WITH HIGH-PRESSURE OIL
The hydraulic system is always under internal pressure. In addition, the fuel piping is also under internal pressure
when the engine is running and immediately after the engine is stopped. When carrying out inspection or replace-
ment of the piping or hoses, check that the internal pressure in the circuit has been released. If this is not done, it
may lead to serious personal injury or death. Always do as follows.
q For details of the method of releasing the pressure, see "METHOD FOR RELEASING INTERNAL PRES-
SURE IN HYDRAULIC CIRCUIT (4-60)". If the circuit is still under pressure, do not carry out any inspection or
replacement operation.
q If there is any leakage from the piping or hoses, the surrounding area will be wet, so check for cracks in the
piping and hoses and for swelling in the hoses.
When carry out inspection, wear safety glasses and leather gloves.
q There is a hazard that high-pressure oil leaking from small
holes may penetrate your skin or cause loss of sight if it
contacts your skin or eyes directly. If you are hit by a jet of
high-pressure oil and suffer injury to your skin or eyes,
wash the place with clean water, and consult a doctor
immediately for medical attention.
PRECAUTIONS WITH HIGH-PRESSURE FUEL
When the engine is running, high-pressure is generated in the engine fuel piping. When carrying out inspection or
maintenance of the fuel piping system, stop the engine and wait for at least 30 seconds to allow the internal pres-
sure to go down before starting the operation.
2-40
SAFETY
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