NHTSA ID Number: 10120537
Manufacturer Communication Number: FSB 846-003rev
TSB/Document Date: 2017-10-25
Summary
MACK Trucks
has determined that certain 2013 through 2015 year model CHU, CXU, GU and MRU trucks equipped with a MP8 model engine may be equipped with an improperly functioning on-board emission-related diagnostic system.
Mack Trucks
Greensboro, NC USA
Field Service Bulletin
Trucks
This document replaces service bulletin 846-003, ”Rearview Mirror
Assembly, Retrofit”, dated 9.2017.
Date
Group
No.
Release
Page
9.2017
846
003
02
1(13)
Rearview Mirror Assembly, Retrofit
LR
FSB 846-003, Rearview Mirror Assembly, Retrofit
(September 2017)
On some LR models with aftermarket bodies, the aftermarket body may impact the A-pillar
mounted passenger side mirror. This is due to the geometry of the mirror support arm. To
correct this issue, install a new mirror following the steps in this document.
Note: This bulletin does not apply to MACK Trucks Australia.
PV729-FSB846-003
USA139453496
Mack Trucks
Field Service Bulletin
Date
9.2017
Group
No.
Release
846
003
02
Parts List
The following parts are required to complete this procedure.
Part Description
Part Number
Quantity
84732306
1.
Mirror Assembly
2.
Upper Mount Gasket
25624989
1
3.
Upper Mount Gasket
25625039
3
4.
Rivet Nut
25089605
2
5.
M8 Flange Bolt
25105726
3
6.
Lower Mount Gasket
82732448
1
7.
Silicone Sealant
N/A
N/A
84732307 (with memory)
1
Page
2(13)
Mack Trucks
Field Service Bulletin
Date
9.2017
Group
No.
Release
846
003
02
Decommissioning the Truck for Repair
You must read and understand the precautions and guidelines in Service Information,
group 80, "General Safety Practices, Body, Cab & Interior" 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.
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 on the front wheels.
W7086748
5 Disconnect the cable from the battery’s negative terminal.
W3086747
Page
3(13)
Mack Trucks
Field Service Bulletin
Date
9.2017
Group
No.
Release
846
003
02
Procedure
1 Remove the panel under the passenger driving wheel.
W8121231
2 Remove the mirror wiring harness grommet from the cab.
W8124664
3 Disconnect the mirror wiring harness connector. Note the location of the connector for use
later.
Page
4(13)
Mack Trucks
Field Service Bulletin
Date
9.2017
Group
No.
Release
846
003
02
4 With a rubber mallet, ease the mirror up and off its mounts with dead blows.
W8124656
5 Remove the upper mirror bracket.
W8124657
6 Clean the A pillar surface thoroughly.
Page
5(13)
Mack Trucks
Field Service Bulletin
Date
9.2017
Group
No.
Release
846
003
02
7 Put a silicone sealant in the mounting holes what will not be reused. Reuse the original
fasteners.
W8124658
Item
Description
Part Number
1.
Silicone Sealant
N/A
2.
Sealing Gasket
25625039
8 Remove the upper bracket from the new mirror assembly.
Note: The use of a rubber mallet may be necessary.
W8124699
Page
6(13)
Mack Trucks
Field Service Bulletin
Date
9.2017
Group
No.
Release
846
003
02
9 Check that the lower mirror bracket is the latest version type as shown. If not, remove and
replace with the latest version.
W8124663
10 Temporarily fit the new bracket to the A-pillar using the upper fastener location.
W8124659
Page
7(13)
Mack Trucks
Field Service Bulletin
Date
9.2017
Group
No.
Release
846
003
02
11 Use the upper bracket to mark the location where the new holes will be drilled.
W8124660
12 Drill the new holes and clean the surface of any burrs.
W8124662
Item
Dimension
Hole Size
11mm
Page
8(13)
Mack Trucks
Field Service Bulletin
Date
9.2017
Group
No.
Release
846
003
02
13 Install rivet nuts into the new drilled holes.
W8124667
Item
Description
Part Number
1.
Rivet Nut
25089605
14 Install the new bracket.
W8124668
Item
Description
Part Number
1.
Gasket
25624989
2.
Gasket
25625039
3.
25105726
Page
9(13)
Mack Trucks
Field Service Bulletin
Date
9.2017
Group
No.
Release
846
003
02
15 Install the new mirror.
W8124707
16 When installing the mirror, be sure that the installation bracket is fully engaged.
W8124712
17 Thread the harness through the hole and install the grommet.
Page
10(13)
Mack Trucks
Field Service Bulletin
Date
9.2017
Group
No.
Release
846
003
02
W8124711
18 Reconnect the mirror harness.
19 Install the panel under the passenger steering wheel.
W8121231
Page
11(13)
Mack Trucks
Field Service Bulletin
Date
9.2017
Group
No.
Release
846
003
02
Commissioning the Truck for Operation
1 Connect the battery cable to the negative (ground) terminal.
W3086758
2 Remove the wheel chocks.
W7086759
Page
12(13)
Mack Trucks
Field Service Bulletin
Date
9.2017
Group
No.
Release
846
003
02
Reimbursement
This repair is covered by an authorized Service Program.
Reimbursement is obtained via the normal claim handling
process.
UCHP
Reimbursement
Claim Type (used only when uploading from the Dealer Bus.
Sys.)
01
Labor CodeRearview Mirror Assembly, Retrofit
8462-16-09-01
2.0 hrs
Causal Part
84222364,
84222365
MACK Trucks North America reserves the right to make any changes in design or to make
additions to or upon its products without incurring any obligations to install the same on
vehicles previously built.
Page
13(13)
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TSB/Document ID: FSB 846-003rev
Replacement Service Bulletin Number:
MFR Communication Date: 2017-09-18
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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