TIB 43-032: RHUC DEF Reroute

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SB-10054570-1783

Technical Information Bulletin
43-032

Section
Exhaust - 43

Subject
DEF Line Routings for 2013 Emission Right Hand Under Cab (RHUC) Exhausts, manufactured 04/01/2013 to 06/10/2013.

Release Date
10/7/2013

Revision
11/1/2013 - Chassis list was updated to reflect correct part length for new hose.
10/7/2013 - Removed 80 chassis that were manufactured with the correct DEF line.

Condition
Chassis affected have DEF lines routed incorrectly which may cause error code P3859 (MX Engine) and P3568 (Cummins), DEF doser not responding or
out of adjustment fault.

Chassis Affected
374 T660/T700 Aero trucks with Right Hand Under Cab exhaust with VOSS DEF hose manufactured between 04/08/2013 and 06/28/2013.

Action

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TIB 43-032: RHUC DEF Reroute

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CAMPAIGN
Review the attached chassis list for your dealer code and schedule your customer(s) for service if their chassis is on the list. Service all chassis affected
that enter your dealership, even if the customer has no issue with the chassis. Use the attached procedure. Review the DWC or SIR online systems for
“Complete” next to the “43-32” campaign code prior to performing this repair.

NOTE: Chassis affected are so new that Kenworth may not have customers’ names and addresses registered. Please contact your
customers or check your lot for these chassis.

Warranty
This emissions campaign does not expire. Kenworth will pay for parts at dealer net, plus applicable mark-up and labor. File the appropriate Quick Claim or
long claim form, if required.
Quick Claim 43-32A; DEF hose M50-6031-71231200 and 0.5 hours labor
Quick Claim 43-32B; DEF hose M50-6031-71231700 and 0.5 hours labor
Quick Claim 43-32C; DEF hose M50-6031-71232000 and 0.5 hours labor
Quick Claim 43-32D; DEF hose M50-6031-71232500 and 0.5 hours labor
Quick Claim 43-32E; DEF hose M50-6031-71232600 and 0.5 hours labor
Quick Claim 43-32F; DEF hose M50-6031-71232700 and 0.5 hours labor
Quick Claim 43-32G; DEF hose M50-6031-71232800 and 0.5 hours labor
CLAIM CODING
Failure Location: 043-007-901
Work Accomplished: 35
Failure Type: 700
Responsibility Code: 01
SRT Code: 043-XXX
Supplier Code: NA

Parts
Parts are available from PACCAR parts.

Background
The fitting on the doser side RHUC Aero Exhaust went from a straight fitting to a 90-degree fitting at the implementation to VOSS
lines. This fitting forced the line downward before it could route back up to the rail or to the tank. This dip in the line can lead to possible
DEF pump priming issues, crystallization, and subsequent fault codes.

Procedure
Rework Instructions

Follow Routing Instructions
If chassis has no active codes present, reroute the DEF line according to attached procedure.
For chassis with active codes present, follow appropriate troubleshooting steps AFTER rerouting DEF lines.
For MX powered chassis with RC4 software, with P1514, P1518 or P151A active codes, contact the ESC for service level key and
use the DEF Operator Interface disable to temporarily disable the de-rates caused by the P3859 fault. This will allow the technician
to operate the vehicle normally and get the diagnostic routine to run and ensure that the condition that triggered the P3859 has been
corrected. Refer to the OBD Repair Verification Cycles Steady-state and DEF doser & SCR drive cycles for the appropriate
conditions that will allow the diagnostic to run.
4. The DEF pressure line from the tank to the doser must be routed such that the last 18 inches of line are at a 10-degree minimum
downward inclination.
1.
2.
3.

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TIB 43-032: RHUC DEF Reroute

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Attachments
Chassis list
Customer Letter TIB 43-032

Authored by: PH

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