Komatsu WA480-8, Руководство по эксплуатации и техническому обслуживанию

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PRECAUTIONS FOR DEF
GENERAL CHARACTER AND PRECAUTIONS FOR HANDLING
DEF is a colourless transparent 32.5% aqueous urea solution. Urea as main constituent is a material which is
used for cosmetics, medical and pharmaceutical products, and fertilizer, etc. The following situations require im-
mediate action:
• If it gets on your skin, it may cause inflammation. Immediately take the contaminated clothes or shoes off
and wash it off with water. In addition, use a soap to wash it off thoroughly. If your skin becomes irritated or
begins to hurt, immediately consult a doctor for treatment.
• Do not induce vomiting if swallowed. If swallowed, thoroughly rinse mouth with water and consult a doctor
for treatment.
• Avoid contact with the eyes. If there is contact, flush with clean water for several minutes and consult a doc-
tor for treatment.
• Wear protective eyeglasses when exposed to DEF to protect from solution splashing in your eyes. Wear
rubber gloves when you perform work handling DEF to avoid skin contact.
PRECAUTIONS FOR ADDING
Do not put fluid other than DEF into DEF tank. If diesel fuel or gasoline is added into the tank, it can cause a
fire. Some fluids or agents added can create and emit a toxic gas.
When opening the cap of DEF tank of the machine, the ammonia vapour may escape. Keep your face away
from the filler port during opening or refilling.
PRECAUTIONS FOR STORING
If the temperature of DEF becomes high, a harmful ammonia gas may be emitted. Completely seal up its con-
tainer for storage. Only open containers in a well-ventilated area. For the method of storing, see “STORE DEF
(4-8)”.
When storing DEF, avoid direct sunlight. Always use the original container it came in. Do not exchange the con-
tainer of DEF with another one. If DEF is stored in an iron or aluminum container, toxic gas may develop and a
chemical reaction may corrode the container.
PRECAUTIONS FOR FIRE HAZARD AND LEAKAGE
DEF is non-flammable; however, in the case of a fire it may generate an ammonia gas. Follow the instructions
and precautions according to “ACTIONS IF FIRE OCCURS (2-16)”.
If DEF is spilled, immediately wash and clean the area with water. If spilled DEF is left unattended and the area
is not washed and cleaned, it can cause corrosion to the contaminated area and emit toxic gas.
OTHER PRECAUTIONS
When disposing of DEF, treat it as an industrial waste. For treatment of the waste, see “PRECAUTIONS FOR
DISPOSING OF WASTE MATERIALS (2-40)”. The container for DEF is an industrial waste as well. It should be
treated in the same way.
Never use an iron or aluminum container when disposing DEF, because toxic gas may develop and a chemical
reaction may corrode the container. Use a container made of resin (PP, PE) or stainless steel when handling the
fluid waste of DEF.
Do not touch any fluid discharged from urea SCR. This fluid becomes acid by the influence of sulphur in the fuel
or built-in oxidation catalyzer. If it gets on your skin, thoroughly wash it off with water.
White powder (crystallized urea) may cover the exhaust pipe outlet of aftertreatment devices. When you wipe off
the covered materials, discard the crystallized urea and the used cloth as industrial waste.
Never relocate or modify the exhaust gas aftertreatment devices. The harmful gas may be exhausted and it can
cause serious damage to the environment as well as violation of laws.
PRECAUTIONS FOR DEF SAFETY
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