MWO-9-2320-272-35-1
MODIFICATION OF 5-TON M939, M939A1, M939A2 SERIES FAMILY OF VEHICLES (FOV)
M939 BRAKE STABILIZATION PROGRAM (RETROFIT OF ANTI-LOCK BRAKE SYSTEM (ABS) FOR M939 FOV); MODIFICATION WORK ORDER
JANUARY 2007
CHANGE 1
MWO-9-2320-272-35-1 - Page 30 of 109
MWO 9-2320-272-35-1
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13. QUALITY ASSURANCE REQUIREMENTS.
a. General. The following information is supplied to ensure the proper application of this modification
and provide clarification in regard to the adequacy of installer’s inspection methods and procedures
applicable to Quality Assurance (QA). The procedures include, but are not limited to, installer
responsibilities, government verification, and in-process and workmanship inspections. Inspections shall be
in accordance with TM 750-245-4.
b. Installer Responsibilities. The installer is responsible for compliance with quality assurance
requirements specified herein. These requirements and the installer’s plan of inspection, or quality program,
constitute the minimum examinations and tests necessary to assure compliance with established
requirements. Requirements contained in the MWO shall be included in the installer’s inspection plan or
quality program. Specific installer responsibilities for this MWO, for installation of the M939 Brake
Stabilization Program Kit, and for follow-on tasks IAW MWO 9-2320-272-35-1. Installer is responsible for
notifying the Government representative if kit was received incomplete or received in open or damaged
packaging material. The installer is responsible for quality workmanship.
c.
In-process Inspection. During the application operation, paragraph 10, Modification Procedures will
be used to check the installer’s work. If ABS fails to operate properly after
the MWO is applied, troubleshoot
IAW paragraph 10.j of this document. The installer will correct all defects before the vehicle is placed in
service. All vehicles modified during a production shift will be checked to ensure product quality.
d. Workmanship Inspection. Inspect components removed, installed or replaced during the modification
for security of mounting.
14. RECORDING AND REPORTING OF THE MODIFICATION.
a. Records and report forms. Refer to DA PAM 738-750, DA PAM 738-751, and TM 9-110-803-15.
b. Quality Assurance Checklist. Complete FORM TRK 1204 Rev A, 20 Feb 02 (Appendix A) for each
vehicle and submit by mail to Premier Professional Systems Inc., 37800 Van Dyke Ave., Sterling
Heights, Michigan 48312.
NOTE
NOTE
Some vehicles modified to include the M939 Brake Stabilization
Program Kit early in the program were marked with “MWO 9-
2320-272-55-1.” These vehicles already have the ABS applied, and
do not require application of this MWO.
c.
Marking Equipment.
(1)
After M939 Brake Stabilization Program Kit is installed, mark MWO number “MWO 9-2320-272-
35-1” in the MWO applied block if not marked, and date in date block on WMWO 9-2320-272-35-1
tag as shown in figure 69.
(2)
Install MWO tag by drilling a 0.104-inch diameter hole (#37 drill) in cab body reinforcement panel
and secure with MS21318-20 drive screw as shown in figure 69.
(3)
After screw is installed, flatten or remove protruding excess screw material from inside of cab
body reinforcement panel.
(4)
Install WMS5100B triangle warning label on lower left corner of driver’s window as shown in
figure 70.
15. MATERIAL CHANGE (MC) NUMBER.
This MWO is authorized by (MC) number 1-97-06-4533.
16. MODIFICATION IDENTIFICATION.
a. When installed correctly, Brake Stabilization Program Kit will appear on MWO tag as shown in figure 69.
b. After Brake Stabilization Program Kit is installed, the vehicle shall be tested for proper operation.Any
faults detected or discrepancies noted will be corrected before the vehicle is returned to normal service.
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