Product Manual

Owner’s Manual for Mobile Generator 25
General Information
Diesel Exhaust Fluid (DEF)
NOTE: Unit does not ship from factory with DEF in tank.
DEF Specification
Diesel exhaust fluid (DEF) is a high-purity liquid that is
injected into the exhaust system of SCR engines.
Maintaining the purity of DEF is important to avoiding
malfunctions in the SCR system. Engines requiring DEF
shall use a quality product that meets the requirements
for Aqueous Urea Solution 32 (AUS 32) according to ISO
22241-1. The use of John Deere DEF is recommended.
If John Deere DEF is not available, use DEF certified by
the American Petroleum Institute (API) Diesel Exhaust
Fluid Certification Program, or by the AdBlue™ Diesel
Exhaust Fluid Certification program. Look for the API
certification symbol or the AdBlue name on the container.
NOTE: Do not create DEF by mixing agricultural grade
urea with water. Do not use additives, as this can
damage the after treatment system.
DEF Warning
DEF can be corrosive to material such as steel, iron,
zinc, nickel, copper, aluminum, and magnesium. The
recommended material for transport and storage of DEF
is made of polyethylene, polypropylene, or stainless
steel. These are not all-inclusive lists. For additional
information, see ISO 22241 or contact a DEF supplier.
DEF Storage Guidelines
NOTE: See the Materials Safety Data Sheet (MSDS) for
additional information.
DEF freezes at temperatures below 12 °F (-11 °C). Do
not use additives to reduce the freezing temperature.
Additives currently available are more corrosive than
DEF, and will cause component and system degradation
and negatively impact reliability. For more information,
see the operator manual, or contact a DEF supplier.
DEF quality degrades rapidly at temperatures above
140 °F (60 °C). To maintain emissions compliance, the
urea concentration must remain between 31.8–33.2%.
Ideal conditions for storage of DEF are:
• Store at temperatures between
23–86 °F (-5–30 °C)
• Store in sealed dedicated containers to avoid
contamination and evaporation
Under these conditions, DEF is expected to remain
usable for a minimum of 18 months. Storing DEF at
higher temperatures can reduce its useful life by
approximately six months for every 9 °F (5 °C) above
86 °F (30 °C). Long-term storage in the DEF tank (over
12 months) is not recommended. If long-term storage is
necessary, test DEF prior to operating engine. See
Testing DEF.
(000337)
CAUTION
Equipment damage. Do not alter DEF. Use approved
DEF only. Failure to do so could cause equipment
damage.
WARNING
Risk of poisoning. Do not ingest diesel exhaust fluid.
Seek medical attention immediately if consumed.
Failure to do so could result in serious injury.
(000334)
WARNING
Personal injury. Do not inhale diesel exhaust fluid fumes.
If breathing becomes difficult, move to an area with fresh
air and seek medical attention immediately. Failure to do
so could result in serious injury.
(000335a)
WARNING
Personal injury. Avoid contact with eyes. Flush eyes
thoroughly with water and seek medical attention
immediately. Failure to do so could result in serious
injury.
(000336)