783
Maintenance
Storing the urea solution
• It is improper to store the urea solution
in the containers made with the certain
materials (i.e. aluminum, copper, cop-
per alloy, non-alloyed still, and galva-
nized steel). The urea solution dis-
solves the metal materials, severely
damaging the exhaust purification sys-
tem to be non-repairable.
• Store the urea solution only in the con-
tainers made with the following materi-
als.
(DIN EN 10 088-1-/-2-/-3-specified CR-
Ni steel, Mo-Cr-Ni steel, polypropy-
lene, and polyethylene)
(Continued)
• Store the urea solution tank only
in the well-ventilated locations.
When the urea solution is
exposed to the hot temperature at
approximately 50°C for an extend-
ed period of time (i.e. under the
direct sunlight), the chemical
decomposition may occur, emit-
ting the ammonia vapor.