FSB-371-044

Field Service Bulletin
Trucks
Mack Trucks, Inc.
Greensboro, NC USA
Date
Group
No.
Release
Page
1.2013
371
044
01
1(3)
SB-10051592-4075
Battery Cable Mounting Clamp
CHU, CXU, GU, LEU, MRU, TD
FSB 371-044, Battery Cable Mounting Clamps
(January 2013)
On some MACK models built, between November 1, 2010 and November 30, 2012, may
experience the battery cable clamps breaking or cracking. This is due to a material and
torque issue.
Follow the procedure below:
You must read and understand the precautions and guidelines in Service Information,
group 20, "General Safety Practices, Engine" before performing this procedure. If you are
not properly trained and certified in this procedure, ask your supervisor for training before
you perform it.
Inspection
1 Secure the vehicle for service by parking it on a flat level surface, applying the parking
brake, chocking the rear wheel, and placing the transmission in neutral.
2 Inspect battery cable clamps, from battery to starter, to determine how many clamps are
cracked or broken.
Note: If no broken clamps are found no further repairs are needed.
PV729-FSB371-044_M
USA57400
Mack Trucks, Inc.
Field Service Bulletin
Date
1.2013
Group
No.
Release
371
044
01
Repair
1 Disconnect all of the positive and negative battery cables from the batteries.
2 Locate the cracked or broken battery cable clamps.
W2079310
1. Cracked or broken clamp
3 Remove the clamp from the bracket mount and cables.
4 Install new clamp part # 21658909 onto the cable and secure bracket mounting. Replace
cable ties as required.
W2079311
Torque the nut to: 8.1 ± 1.4 Nm (6 ± 1 ft-lb)
Note: Ensure new clamp is positioned correctly before snapping together otherwise
repositioning may be difficult.
5 Replace other broken clamps as required.
Note: This depends on the number of broken clamps found during inspection.
6 Verify cables are not rubbing, correct as necessary.
7 Connect all the positive (+) and negative (-) cables previously removed from the batteries
on the left and right side battery boxes.
Page
2(3)
Mack Trucks, Inc.
Field Service Bulletin
Date
1.2013
Group
No.
Release
371
044
01
Page
3(3)
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
1413A–01–80
0.3 hrs.
Each additional clamp
1414A–01–80
0.1 hrs.
Causal Part
21521968
Mack Trucks, Inc. engages in a comprehensive program of testing and evaluating to provide
the best possible product. Mack Trucks, Inc. however, is not committed to, or liable for
updating existing vehicles.