System Overview
This vehicle is equipped with a Diesel Exhaust Fluid (DEF) injection system and a
Selective Catalytic Reduction (SCR) catalyst to meet the emission requirements.
The DEF injection system consists of the following components:
• DEF tank
• DEF pump
• DEF injector
• Electronically-heated DEF lines
• DEF control module
• NOx sensors
• NH3 sensor
• Temperature sensors
• SCR catalyst
The DEF injection system and SCR catalyst enable the achievement of diesel
emissions requirements; while maintaining outstanding fuel economy, drivability,
torque and power ratings.
NOTE:
• Your vehicle is equipped with a DEF injection system. You may occasionally hear
an audible clicking noise. This is normal operation.
• The DEF pump will run for a period of time after engine shutdown to purge the DEF
system. This is normal operation.
Diesel Exhaust Fluid Storage
Diesel Exhaust Fluid (DEF) is considered a very stable product with a long shelf life.
If DEF is kept in temperatures between 10° to 90°F (-12° to 32°C), it will last a
minimum of one year.
DEF is subject to freezing at the lowest temperatures. For example, DEF may freeze
at temperatures at or below 12°F (-11°C). The system has been designed to operate
in this environment.
NOTE:
When working with DEF, it is important to know that:
• Any containers or parts that come into contact with DEF must be DEF compatible
(plastic or stainless steel). Copper, brass, aluminum, iron or non-stainless steel
should be avoided as they are subject to corrosion by DEF.
• If DEF is spilled, it should be wiped up completely.
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Summary of Contents for Chassis CAB 4500 2016
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