FSB 371-047

Field Service Bulletin
Trucks
Mack Trucks, Inc.
Greensboro, NC USA
Date
Group
No.
Release
Page
3.2014
371
047
01
1(10)
Power Wires, Rerouting
CHU, CXU, GU, TD
FSB 371-047, Power Wires, Rerouting
(March 2014)
Certain MACK CHU, CXU, GU, and TD truck models built between 01/01/07 and 10/22/13,
utilizes two (red) power wires that route from the Bussed Electrical Center (BEC) and behind
the radio. The (red) power wires could possibly chafe on the radio bracket. The (red) power
wires have ID’s (RDB and RDC) and both terminate at the BEC connector (J4). The (red)
power wires are too long, and require rerouting along the main BEC wiring bundle with a
cable tie for retention. Rerouting the (red) power wires prevent any possible chaffing.
Note: This bulletin does not apply to MACK Trucks Australia.
W3088172
Required Parts
Power Wires, Rerouting Parts
Item
Description
Part Number
Qty
1
Cable Tie
21022396
1
PV729-FSB371-047_M
USA63935
Mack Trucks, Inc.
Field Service Bulletin
Date
3.2014
Group
No.
Release
371
047
01
Procedure
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.
DANGER
Do not attempt to repair or service this vehicle without having sufficient 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 level surface.
2 Apply the parking brake.
3 Place the transmission in neutral or park.
4 Install the wheel chocks.
W7086748
Page
2(10)
Mack Trucks, Inc.
Field Service Bulletin
Date
3.2014
Group
No.
Release
371
047
01
5 Disconnect the cable from the battery’s negative terminal.
W3086747
6 Remove the brake knobs from the dash.
W3088166
Page
3(10)
Mack Trucks, Inc.
Field Service Bulletin
Date
3.2014
Group
No.
Release
371
047
01
7 Remove the fasteners securing the dash trim panel.
W3088167
8 Remove the dash trim panel.
W3088168
Page
4(10)
Mack Trucks, Inc.
Field Service Bulletin
Date
3.2014
Group
No.
Release
371
047
01
9 Remove the fasteners securing the radio\storage pocket panel.
W3088169
10 Remove the radio\storage pocket panel.
W3088170
Page
5(10)
Mack Trucks, Inc.
Field Service Bulletin
Date
3.2014
Group
No.
Release
371
047
01
11 Locate the (red) power wires.
W3088171
12 Route the power wires as shown in the figure below.
Note: Route the power wires along the cab harness with minimal bending.
13 Using a cable tie (1), secure the power wires as shown.
W3088172
Page
6(10)
Mack Trucks, Inc.
Field Service Bulletin
Date
3.2014
Group
No.
Release
371
047
01
14 Install the radio\storage pocket panel.
W3088170
15 Install the fasteners securing the radio\storage panel.
Note: Tighten the fasteners with hand tools only.
W3088169
Page
7(10)
Mack Trucks, Inc.
Field Service Bulletin
Date
3.2014
Group
No.
Release
371
047
01
16 Install the dash trim panel.
W3088168
17 Install the fasteners securing the dash trim panel.
Note: Tighten the fasteners with hand tools only.
W3088167
Page
8(10)
Mack Trucks, Inc.
Field Service Bulletin
Date
3.2014
Group
No.
Release
371
047
01
18 Install the brake knobs.
W3088166
19 Connect the battery cable to the negative (ground) terminal.
W3086758
Page
9(10)
Mack Trucks, Inc.
Field Service Bulletin
Date
3.2014
Group
No.
Release
371
047
01
20 Remove the wheel chocks.
W7086759
Reimbursement
This repair may be eligible for reimbursement if a product failure was experienced
within time and mileage limits of the applicable Warranty coverage. Reimbursement
is obtained via the normal claim handling process.
Claim Type (used only when uploading from the Dealer Bus. Sys.)
01
Labor Code
Primary Labor Code
7246J-01-80
0.3 hrs.
Causal Part
21022396
Mack Trucks Inc. 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.
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