TSB150089-020516

New Backflow Connector for the Bosch® Aftertreatment Diesel Exhaust Fluid (DEF) Do... Page 1 of 6
Technical Service Bulletin Number
TSB150089
Technical Service Bulletin
Subject
New Backflow Connector for the Bosch® Aftertreatment Diesel Exhaust Fluid (DEF) Dosing
Unit.
Issue
In some cases the aftertreatment Diesel Exhaust Fluid (DEF) dosing lines are not being fully
purged during the purge cycle.
This can result in internal cracking of the aftertreatment DEF dosing unit and leakage of DEF.
A revised backflow connector for the Bosch® aftertreatment DEF dosing unit has been
released. The revised backflow connector will help to fully purge DEF from the DEF dosing
lines and aftertreatment DEF dosing unit during the purge cycle.
Verification
Product Affected
Table 1, Product Affected
Engine Model Name
ISB6.7
ISC
ISL9
Engine Control System
Identifier
CM2350
B101
CM2250
Not Applicable
CM2250
Not Applicable
CM2250
Not Applicable
CM2350
L101, L111
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ISX12
CM2350
X102
ISX12/ISX11.9
CM2250
Not Applicable
CM2250
Not Applicable
CM2350
X101
QSF3.8*
CM2350
F107
QSB4.5*
CM2350
B106
QSB6.7*
CM2350
B105
QSL9*
CM2350
L102
ISX15
*Off-higway
Resolution
The existing aftertreatment DEF dosing unit, Part Numbers 2871879 and 2871880 and existing
backflow connector, Part Number 2888180, have been obsoleted.
Aftertreatment DEF dosing units will be released as two different part numbers, one with the
revised backflow connector and one with the existing backflow connector. The revised
temporary backflow connector can be distinguished by the laser mark around the base. The
revised final backflow connector is red in color for ease of identification. See Figure 2 for
examples of each connector.
The location of the aftertreatment DEF dosing unit varies by OEM. Not all OEMs will require
the revised backflow connector.
For removal and installation instructions of the revised backflow connector. See procedure
011-058 Aftertreatment Diesel Exhaust Fluid Dosing Unit in section 11 in the corresponding
service manual.
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Figure 1, Revised Backflow Connector, Part Number 4387302, Installed in the
Aftertreatment DEF Dosing Unit
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Figure 2, Backflow Connectors From Left: Existing Design, Temporary Revised Design,
Final Revised Design
Service Instructions
Scenario 1: If the unit is not an Original Equipment Manufacturer (OEM) listed in Table 2
below and only the backflow connector does not meet reuse guidelines.
Scenario 1 Resolution: The revised backflow connector, Part Number 4387302 must be used.
Scenario 2: If the unit is not an OEM listed in Table 2 below and the aftertreatment DEF
dosing unit does not meet reuse guidelines.
Scenario 2 Resolution: The aftertreatment DEF dosing unit, Part Number 4387304 or 4387305,
with revised backflow connector must be used.
Scenario 3: If the unit is one of the OEMs listed below in Table 2 and only the backflow
connector does not meet reuse guidelines.
Scenario 3 Resolution: The existing backflow connector, Part Number 4387659, must be
used.
Scenario 4: If the unit is one of the OEMs listed below in Table 2 and the aftertreatment DEF
dosing unit does not meet reuse guidelines.
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Scenario 4 Resolution: The aftertreatment DEF dosing unit, Part Number 4387657 or 4387658,
with existing backflow connector must be used.
CAUTION
Off-highway units listed above with ECM calibration codes after 1
December 2015 must have the revised backflow connector installed or
damage to the DEF dosing system can occur. Reference TRP1732.
Reference Table 3 and 4 below for full part descriptions.
Table 2, OEM Name
Autocar llc
KME
Newell
Seagrave
Tiffin
Emergency One
Linkbelt
Nova Bus
Spartan Motors Inc.
Van Hool
Ferrara
Lodal Inc.
Oshkosh
Sutphen
Grove
MCI
Pierce
TEMSA
HME
NABI
Rosenbauer
Terex
Service Part Availability
Table 3, Revised Backflow Connector and Aftertreatment DEF Dosing Units With
Revised Backflow Connector
Part Description
Part Number
Backflow Connector
4387302
Supply Module 12 VDC
4387304
Supply Module 24 VDC
4387305
Table 4, Existing Backflow Connector and Aftertreatment DEF Dosing Units With
Existing Backflow Connector
Part Description
Part Number
Backflow Connector
4387659
Supply Module 12 VDC
4387657
Supply Module 24 VDC
4387658
Table 5, Obsolete Backflow Connector and Obsolete Aftertreatment DEF Dosing Units
Part Description
Part Number
Backflow Connector
2888180
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Supply Module 12 VDC
2871879
Supply Module 24 VDC
2871880
Warranty Statement
The information in this document has no effect on present warranty coverage or repair
practices, nor does it authorize TRP or Campaign actions.
Document History
Date
2015-6-4
2015-11-3
2016-2-5
Details
Module Created
Non-Product Problem Solving (PPS)
Added Figure 2. Added caution.
Last Modified: 15-Feb-2016
Copyright © 2000-2010 Cummins Inc. All rights reserved.
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