WARNING
Diesel Exhaust Fluid (DEF) contains
urea. DO NOT get the substance in
your eyes. In case of contact, immedi-
ately flush eyes with large amounts of
water for a minimum of 15 minutes.
DO NOT swallow internally. In the
event the diesel exhaust fluid is ingest-
ed, contact a physician immediately.
Reference the Materials Safety Data
Sheet (MSDS) for additional informa-
tion. Failure to comply may result in
personal injury.
CAUTION
Never attempt to create Diesel Ex-
haust Fluid (DEF) by mixing agricultur-
al grade urea with water. Agricultural
grade urea does not meet the neces-
sary specifications required and the
engine aftertreatment system may be
damaged. Failure to comply may result
in equipment damage.
CAUTION
PACCAR Inc requires the use of DEF
meeting ISO 22241-1 (DIN 70070) spec-
ifications. There is NO acceptable sub-
stitute. Failure to use the correct DEF
may cause engine damage and/or void
the warranty.
• Some locations may reference
the DIN 70070 standard. DEF
specification limits of this stand-
ard are identical to ISO 22241-1.
PACCAR Inc is not responsible for failures
or damage resulting from what PACCAR
Inc determines to be abuse or neglect,
including but not limited to: operation
without correctly specified DEF; lack of
maintenance of the engine aftertreatment
system; improper storage, or shutdown
practices; unauthorized modifications of
the engine and engine aftertreatment
system. PACCAR is also not responsible
for failures caused by incorrect DEF or by
water, dirt or other contaminants in the
DEF. Refer to your engine and vehicle
operator's manuals for maintenance,
storage, and shutdown information.
For engines using SCR operating in the
United States and Canada, it is
recommended that the DEF used be
certified by the American Petroleum
Institute (API).
NOTE
To ensure the correct DEF is used,
PACCAR Inc recommends the use of
TRP
®
CleanBlue Diesel Exhaust Fluid
which is available in different quantity
options from small to bulk containers.
DEF Availability
• DEF is readily available at truck
stops and at all PACCAR Engine
ENGINE MAINTENANCE - Diesel Exhaust Fluid Recommendations and Specifications
Y53-1183-1G1 (05/19) 53
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