NON COMPLIANCE RECALL
Mack Trucks Inc.
Greensboro, NC USA
Date
11.2019

Number
EC0020C

Release
01

Page
1(16)

Cabover, Analysis & SCR Hardware Replacement - 2 box
MR, TE, LR
NON COMPLIANCE RECALL INFORMATION
(November 2019)
Mack Trucks has determined that certain model year 2017-2018 MP7/MP8 model
engines may be equipped with an improperly functioning SCR (Selective Catalytic
Reduction) system due to Low NOx Conversion Efficiency DTC (Diagnostic Trouble
Code), which may cause a loss of catalyst performance that violates Federal and
California standards and regulations. The root cause is that water is chemically bonding
and deactivating the catalyst during extended low temperature operation followed by high
temperature operation.
This issue is to be addressed by updating ECM software, inspecting DEF system,
running Premium Tech Tool function “Exhaust Aftertreatment System Analysis”,
replacing the SCR system with one containing an improved hybrid catalyst, and
returning the SCR as instructed.
Follow the procedure outlined in this document.

VEHICLES AFFECTED
Certain Mack North America vehicles manufactured between October 16th, 2017 and September
25th, 2018.

VEHICLE QUANTITY
There are 347 vehicles affected by this recall (320 U.S., 27 Canada).

Page 2 of 16

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Material Needed
REQUIRED PARTS:
Order parts through standard Parts Distribution Center (PDC) process.
Parts List
Item

Part Number

1

23190007

2

21021850

V-Clamp

1

2

21095726

Gasket

1

4

22998036

Strap

4

5

85152363

Decal (Campaign Completion Decal)
NOTE: N/A if previously installed on truck

1

6

N/A

Vehicle Emissions Recall – Proof of
Correction Certificate US-CAN (EN)
NOTE: See last page of recall for this form

1

Description

Qty

Muffler Hybrid SCR 2-Box Bottom

REQUIRED TOOLS
Premium Tech Tool (PTT) version 2.7.75 or higher
Vocom (one of the following 16 Pin cables) 88890304, 88890253, or 88894001
Vocom Communication Interface 88890300, or 88894000
Vocom USB Cable 88890313
Refractometer 88890105
Litmus paper 88890110
NOTE
Using other interfaces may affect programming speed.

NOTE
Ensure PTT version 2.7.75 or higher is used for complete PTT
functionality. Earlier versions of PTT will not have functions for the
following steps to complete this recall. Check Premium Tech Tool
version by clicking on Help tab and then click on “About Tech Tool”.

1

MACK Trucks Inc.
NON COMPLIANCE RECALL

Date

Number

Page

3 (16)
11.2019
EC0020C
______________________________________________________________________________________

Repair – All Mack MR, TE, LR Chassis configurations.
Repair Index
Section
1
2
3
4
5
6
7
8

Description
Update Software
Inspection, DEF
Exhaust Aftertreatment System Analysis Test
SCR Replacement
Inspection, SCR Crystallization
SCR Return Policy
Label & Certificate
Reimbursement

Page
Number
4
5
5
9
10
10
12
14

Page 4 of 16

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UPDATE SOFTWARE
You must read and understand the precautions and guidelines in Service
Information, group 30, "General Safety Practices, Electrical" before
performing this procedure. If you are not properly trained and certified in this
procedure, ask your supervisor for training before you perform it.
NOTE: Information is subject to change without notice. Illustrations are used
for reference only and can differ slightly from the actual vehicle being
serviced. However, key components addressed in this information are
represented as accurately as possible.

training, the correct service literature and the proper tools. Failure to follow
this could make the vehicle unsafe and lead to serious personal injury or
death.
1. Park the vehicle on a flat and level surface.
2. Apply the parking brake.
3. Place the transmission in neutral or park.
4. Install the wheel chocks.

5. Using Premium Tech Tool (PTT), connect to the vehicle
6. Update EMS Software to Part Number 23766686.
7. Note: Follow the on screen prompts until the programming is complete.
8. Disconnect the vehicle from Premium Tech Tool (PTT)

MACK Trucks Inc.
NON COMPLIANCE RECALL

Date

Number

Page

5 (16)
11.2019
EC0020C
______________________________________________________________________________________

INSPECTION, DEF

NOTE
Record values for steps 9 through 11 and steps 22 through 24 on the
“DEF Inspection Check List” found page 15. This sheet will need to be
saved and uploaded to UCHP with the claim information.
9. Inspect DEF Quality using a Refractometer (P/N 88890105). Record Value.
10. Inspect DEF Quality using a Litmus Paper (P/N 88890110). Circle “Pass” or “Fail”.
11. Inspect DEF Tank for contamination of any dirt, debris, coolant, water fuel, oil etc. Circle

answer “Yes” or “No”.

NOTE
If contaminates are found, continue with recall procedures. Once recall
is completed consult with customers for repair of the contaminated DEF
system.

EXHAUST AFTERTREATMENT SYSTEM ANALYSIS

NOTE
Regardless of results from Exhaust Aftertreament System Analysis, if
the test aborts before completing, or if the test fails to progress to next
step for 15 minutes continue to step 21 of this recall.

NOTE
Before continuing ensure PTT version 2.7.75 or higher is used for
complete PTT functionality and the ECM Software is updated to
23766686. In addition, PTT may require to be restarted and a new work
session opened for the “Exhaust Aftertreatment System Analysis” to
function.
12. Start the PC and open Premium Tech Tool (PTT).
13. Connect the interface to PC and vehicle. Ignition switch needs to be in the “on” position.
14. Perform identification and connection dialog.

Page 6 of 16

_______________________________________________________________________________

15.

From the “Test” tab, select “2589-08-03-18 Exhaust Aftertreatment System Analysis” and
then select “Start”.

16.

Select “Continue”.

MACK Trucks Inc.
NON COMPLIANCE RECALL

Date

Number

Page

7 (16)
11.2019
EC0020C
______________________________________________________________________________________

17.

Verify the manual conditions are met, check the “Confirmed” box, and the select
“Continue”.

18.

Uncheck “Aftertreament Hydrocarbon Injection (AHI) System Box, and select “Start” on
the upper left side of the screen.

Page 8 of 16

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Wait for test to go through all phases of the operation. Note the blue indicator on the right
will move through each phase.

19.

Once the test is complete, results will populate. Regardless of results select continue.
Return to the main screen in PTT and select “Finish Work”.
20.

For More Information

MACK Trucks Inc.
NON COMPLIANCE RECALL

Date

Number

Page

9 (16)
11.2019
EC0020C
______________________________________________________________________________________

SCR REPLACEMENT
21. Follow standard repair instructions and parts list per model key listed below

(Ref. Image #1).
Operation ID
Model

Repair Operation

Repair Identity

MR

2586-03-02-01

138458241

TE

2586-03-02-01

144179816

LR

2586-03-02-01

144179844

Image #1- 2-Box Selective Catalytic Reduction (SCR)

Page 10 of 16

_______________________________________________________________________________
INSPECTION, SCR CRYSTALLIZATION
NOTE
Record values for steps 9 through 11 and steps 22 through 24 on the
“DEF Inspection Check List” found page 15. This sheet will need to be
saved and uploaded to UCHP with the claim information.
22. Inspect DEF Dosing Valve for excessive crystallized DEF – Circle found condition
23. Inspect SCR Diffuser Pipe for excessive crystallized DEF – Circle found condition
24. Inspect SCR Inlet for excessive crystallized DEF – Circle found condition

SCR RETURN PROCESS
***The UCHP Claim (part return) will be arriving in your “MI Tab” within no later than 7 days after
crediting. Please follow the below shipping instructions on the UCHP shipping documents***
25. Ensure all plugs and caps supplied with the new SCR are reused and installed on returned part.
Securely band SCR to Pallet.
NOTE
All SCR openings must be sealed to eliminate contamination. If plugs
and caps are damaged use water proof tape to cover the openings.

26. Record failed SCR Part Number, Serial number to enter into UCHP Claim

MACK Trucks Inc.
NON COMPLIANCE RECALL

Date

Number

Page

11 (16)
11.2019
EC0020C
______________________________________________________________________________________

27. Enter Failed SCR Serial Number in UCHP Claim for the Failed/Casual Part & New Part.

28. Attach TMAC return label per normal process to return shipment.

Page 12 of 16

_______________________________________________________________________________
LABEL & CERTIFICATE
NOTE
A campaign completion label (part number 85152363) needs to be
installed on truck if not previously installed. To signify the campaign has
been completed, use a permanent marker (Such as a Sharpe ®) to
write the recall number, completion date (MM/DD/YYYY) and dealer
code on the label. The label is to be applied to the inside of the
passenger door as shown in the illustrations below

Label Placement- Cabover Chassis Configuration

Dual steering wheels

Single left side steering wheel

MACK Trucks Inc.
NON COMPLIANCE RECALL

Date

Number

11.2019

EC0020C

Page

13 (16)

______________________________________________________________________________________

NOTE
A Vehicle Emissions Recall – Proof of Correction Certificate is provided
on last page of this recall. See the example below. Fill in the appropriate
information for your records and provide a copy to the customer.

Page 14 of 16

_______________________________________________________________________________
REIMBURSEMENT
This repair is covered by an authorized Non Compliance Recall Campaign. Reimbursement is
obtained through the normal claim handling process.

UCHP Reimbursement
Claim Type (used only when uploading from the Dealer
Business System)

40

Recall Status
Vehicle repaired per instructions

1-Modified per instructions

Labor Codes
Primary Labor Code:
Aftertreatment Selective catalytic Reduction (SCR) Catalyst,
Replacement
Exhaust Aftertreatment System Analysis
Program Engine Electronic Control Unit
Causal Part
Authorization Number

2586-03-02-01
Models MR, TE, LR
2.3 hrs
2589-08-03-18
1.0
2840-22-03-01
0.5
22058306
M0068

Note: Dealers are to perform Non Compliance Recall on all subject vehicles at no charge
to the vehicle owner regardless of mileage, age of vehicle or ownership (original purchaser
or subsequent purchasers). Whenever vehicles are subject to a Non Compliance Recall
are brought to your dealership for service, or taken into your dealership vehicle inventory,
it is strongly recommended that every effort be made to perform the recall correction
before the vehicle is sold or released to the owner.

MACK Trucks Inc.
NON COMPLIANCE RECALL

Date

Number

11.2019

EC0020C

Page

15 (16)

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Page 16 of 16

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