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.
Adding Diesel Exhaust Fluid (DEF)
The DEF gauge (located in the instrument cluster) will display the level of DEF
remaining in the tank.
Completely fill the DEF tank through the diesel exhaust fluid fill location at every
maintenance interval, or before if prompted by the instrument cluster display.
The DEF tank on these vehicles is designed with a large amount of full reserve. So,
the level sensor will indicate a full reading even before the tank is completely full.
To put it another way, there’s additional storage capacity in the tank above the Full
mark that’s not represented in the gauge. You may not see any movement in the
reading – even after driving up to 2,000 miles in some cases.
NOTE:
• Driving conditions (altitude, vehicle speed, load, etc.) will effect the amount of
DEF that is used in your vehicle.
• Another factor is that outside temperature can affect DEF consumption. In cold
conditions – 12° F (-11° C) and below – the DEF gauge needle can stay on a fixed
position and may not move for extended periods of time. This is a normal function
of the system.
6 . 7 L C U M M I N S D I E S E L
185
Summary of Contents for CHASSIS CAB 3500 2017
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