TM-9-2320-272-24-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4
JUNE 1998
TM-9-2320-272-24-1 - Page 708 of 1015
TM 9-2320-272-24-1
3-129. GROUND STRAP REPLACEMENT
THIS TASK COVERS:
a. Ground Strap (M939/A1) Removal
b. Ground Strap (M939/A1) Installation
c. Ground Strap (M939A2) Removal
d. Ground Strap (M939A2) Installation
INITIAL SETUP:
APPLICABLE MODELS
REFERENCES (TM)
All
TM 9-2320-272-10
TOOLS
TM 9-2320-272-24P
General mechanic’s tool kit (Appendix E, Item 1)
EQUIPMENT CONDITION
MATERIALS/PARTS
l
Parking brake set (TM 9-2320-272-10).
l
Hood raised and secured (TM 9-2320-272-10).
Three lockwashers (M939/A1)
(Appendix D, Item 379)
Lockwasher (M939/A1) (Appendix D, Item 372)
Lockwasher (M939/A1) (Appendix D, Item 382)
Locknut (M939/A1) (Appendix D, Item 291)
Three lockwashers (M939A2)
(Appendix D, Item 356)
Four lockwashers (M939A2)
(Appendix D, Item 372)
Two lockwashers (M939A2)
(Appendix D, Item 360)
a. Ground Strap (M939/A1) Removal
1.
2.
3.
4.
5.
6.
Remove screw (1), washer (2), ground strap (6), lockwasher (4), and clamp (3) from firewall (5).
Discard lockwasher (4).
Remove screw (7), wire (8), ground strap (6), and lockwasher (9) from engine (10). Discard
lockwasher (9).
Remove screw (11), two washers (12), ground strap (15), and lockwasher (14) from air compressor (13).
Discard lockwasher (14).
Remove locknut (18), clamp (19), screw (16), lockwasher (20), and ground strap (15) from frame rail (17).
Discard locknut (18) and lockwasher (20).
Remove screw (24), washer (23), ground strap (22), and lockwasher (21) from engine (10). Discard
lockwasher (21).
Remove nut (28), washer (27), wires (29) and (26), and ground strap (22) from engine starter (25).
b. Ground Strap (M939/A1) Installation
1.
Install ground strap (22) on engine starter (25) with wires (26) and (29), washer (27), and nut (28).
2.
Install new lockwasher (21), ground strap (22), washer (23), and screw (24) on engine (10).
3.
Install screw (16), new lockwasher (20), ground strap (15), clamp (19), and new locknut (18) on
frame rail (17).
4.
Install new lockwasher (14), ground strap (15), two washers (12), and screw (11) on air compressor (13).
5.
Install new lockwasher (9), ground strap (6), wire (8), and screw (7) on engine (10).
6.
Install new lockwasher (4), ground strap (6), clamp (3), washer (2), and screw (1) on firewall (5).
3-344
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