Service Manual

Aftertreatment Diesel Exhaust Fluid Dosing Unit ISB, ISBe and QSB (Common Rail [...]
Page 11-40 Section 11 - Exhaust System - Group 11
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Aftertreatment Diesel Exhaust Fluid
Dosing Unit (011-058)
General Information
WARNING
DEF contains urea. Do not get the substance in your
eyes. In case of contact, immediately flush eyes with
large amounts of water for a minimum of 15 minutes.
Do not swallow. In the event the DEF is ingested,
contact a physician immediately. Reference the
materials safety data sheet (MSDS) for additional
information.
WARNING
The exhaust and exhaust components can remain hot
after the engine has been shut down or secured. To
avoid the risk of fire, property damage, burns or other
serious personal injury, allow the exhaust system to
cool before beginning this procedure or repair and
make sure that no combustible materials are located
where they might come in contact with hot exhaust or
exhaust components
The diesel exhaust fluid (DEF) dosing unit connections
are illustrated:
1 Compressed air supply
2 Air solenoid connector (2-pin)
3 37-pin ITT Cannon™ connector
4 DEF supply to aftertreatment nozzle
polytetrafluoroethylene (PTFE) line.
5 DEF supply to pump
6 DEF return
Lines 4, 5, and 6 have quick-fit connections.
This procedure describes a method for testing the air flow
from the aftertreatment nozzle line.
Initial Check
©heck the DEF nozzle supply line for signs of damage or
leaks.
DEF will leave white deposits if a leak exists.