STORE DEF
• If the temperature of DEF becomes high, harmful ammonia gas may be generated. Completely seal up its
container for storage. Only open containers in a well-ventilated area.
• Store DEF avoiding direct sunlight. Always use the original container at the time of purchase. Do not ex-
change the container 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.
• DEF freezes at –11 °C. The recommended temperature for storage is -5 °C or above.
The relation between the upper limit of storage temperature and the storage period of DEF is shown in the
table.
Temperature of storage area
Storage period
Max.10 °C
Up to 36 months
Max.25 °C
Up to 18 months
Max.30 °C
Up to 12 months
Max.35 °C
Up to 6 months
*: Do not store DEF in the temperature of 35 °C or above.
Handling DEF in cold weather
• DEF freezes at –11 °C.
DEF may freeze and expand to break the devices and parts in the tank. The parts inside the tank may be
affected. Add DEF to the specified amount for cold weather (below the level of when DEF may freeze).
• In cold weather, keep DEF or the machine installed with DEF in the indoors where the temperature is at –
11 °C or higher to prevent DEF in the tank from freezing.
If DEF or the machine installed with DEF cannot be stored in the indoors where the temperature is at –
11 °C or higher (if they are left outdoors in cold weather), DEF in the tank may freeze. Drain DEF to prevent
it from freezing.
00 INDEX AND FOREWORD
STORE DEF
PC290LL-11
00-41
