TSB180047-041320
Service Bulletin Details
Public Details for: TSB180047-041320
This technical service bulletin describes the verfication and resolution of diesel exhaust fluid (def) dosing unit heater elements becoming discolored caused by chemical reactions between def and the aluminum housing. Also the def dosing va
- 9999 -
Models from 9999
9999 CUMMINS B6.7 |
9999 CUMMINS CUMMINS |
9999 CUMMINS L9 |
Aftertreatnent Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration Page 1 of 9 Technical Service Bulletin Technical Service Bulletin: Released Date: 18-Apr-2018 TSB180047 Aftertreatnent Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration Aftertreatnent Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration 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. Contents Product Affected • • • • • • • • B6.7 CM2350 B121B L9 CM2350 L116B X12 CM2350 X119B X15 CM2350 X114B X15 CM2350 X116B QSK19 CM2350 K105 QSK50 CM2350 K108 QSK95 CM2350 K113 Issue Symptom: • Diesel exhaust fluid (DEF) dosing unit heater elements can be discolored caused by chemical reactions between aluminum housing and DEF. • DEF dosing valve inlet screen can become plugged with debris when corrosion on the DEF dosing unit heating element flakes off. • A plugged DEF dosing valve inlet screen will typically lead to FC1682, FC3574, and/or FC3596. https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html 4/19/2018 Aftertreatnent Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration Page 2 of 9 Note : Additional DEF system related fault codes can be present. Verification/Confirmation Verify symptoms and/or listed Fault Codes are present. Resolution If DEF dosing valve inlet screen is found to be plugged with debris, and corrosion on DEF dosing unit heating element is flaking off: • DEF dosing unit and DEF dosing valve inlet screen must be replaced. DEF pressure line, between DEF dosing unit and DEF dosing valve must be flushed with distilled water to remove any residual debris. • See Figure 1 for an example of a plugged DEF dosing valve inlet screen. • See Figure 2 for an example of a DEF dosing unit heating element with corrosion that is flaking off. If DEF dosing valve inlet screen is not plugged with debris and there is corrosion on DEF dosing unit heating element, but is not flaking off: • Do not replace DEF dosing unit (for this condition). All DEF dosing units will have some level of discoloration/corrosion internally. • See Figure 3 for an example of a clean DEF dosing valve inlet screen. • See Figures 4, 5, and 6 for examples of DEF dosing units with acceptable levels of discoloration/corrosion. Note : If DEF dosing valve inlet screen was removed from DEF dosing valve during inspection, DEF dosing valve inlet screen must be replaced. Part Identification https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html 4/19/2018 Aftertreatnent Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration Page 3 of 9 Figure 1, Plugged DEF Dosing Valve Inlet Screen. https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html 4/19/2018 Aftertreatnent Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration Page 4 of 9 Figure 2, Corroded DEF Dosing Unit Heating Element https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html 4/19/2018 Aftertreatnent Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration Page 5 of 9 Figure 3, Normal DEF Dosing Valve Inlet Screen. https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html 4/19/2018 Aftertreatnent Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration Page 6 of 9 Figure 4, Normal DEF Dosing Unit Heating Element Discoloration. https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html 4/19/2018 Aftertreatnent Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration Page 7 of 9 Figure 5, Normal DEF Dosing Unit Heating Element Discoloration. https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html 4/19/2018 Aftertreatnent Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration Page 8 of 9 Figure 6, Normal DEF Dosing Unit Heating Element Discoloration. Affected UL2 DEF dosing unit parts numbers can be seen in Table 1: Table 1: Affected DEF dosing unit part numbers CES Part Number EBU Part Number A052Y605 4388105 A051F964 4377994 A047H782 4353810 A050G798 4377364 A055B124 5373865 A055B125 5373866 A057Y382 5375478 A057Y387 5375479 A057Y445 5375480 A057Y212 5375481 A057Y215 5375482 https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html 4/19/2018 Aftertreatnent Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration Page 9 of 9 Document History Date 2018-4-13 Details Module Created Last Modified: 18-Apr-2018 https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html 4/19/2018