Service Manual

ISB, ISBe and QSB (Common Rail [...] Aftertreatment Diesel Exhaust Fluid Line Restriction Te [...]
Section 11 - Exhaust System - Group 11 Page 11-55
To buy Cummins Parts and Service Manuals, Training Guides, or Tools go to our website at https://store.cummins.com
Test
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.
The DEF dosing unit must be wiped with a clean damp
cloth and/or a spray bottle with mild detergent. This will
remove any contamination and reduce the risk of debris
entering the DEF dosing unit.
NOTE: Do not power wash or steam clean this unit.
Leak Test
1 Disconnect the DEF supply pipework from the DEF
dosing unit and drain any excess DEF into a suitable
container, then remove the DEF supply line connection
from the DEF tank.
2 Block one end of the DEF supply line and attach the
male J2044 line from the vacuum test kit to the
opposite end.
3 Slowly operate the vacuum pump until a vacuum of 15
kPa [2 psi] is achieved, then hold for 60 seconds.
Observe the gauge to confirm that the pump holds the
vacuum, with no noticeable change to gauge reading.
If the gauge value changes in this time, a leak exists in
the system. Disconnect the vacuum pump and
investigate / repair the source of the leak.
4 Connect the DEF supply line to the DEF tank.
5 Repeat these steps with the DEF return line.
NOTE: Consult the OEM service manual for information
regarding DEF line routing and repair/replacement
procedures.