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 6 of 1015
TM 9-2320-272-24-1
*This publication supersedes TM 9-2320-272-20-1,24 October 1985, and changes 1 through 4; TM 9-2320-272-20-2,25
October 1985, and changes 1 through 3; TM 9-2320-272-34-1, 10 June 1986, and changes 1 through 2; TM 9-2320-272-34-2,
10 June 1986, and changes 1 and 2; and TM 9-2320-358-24&P, 21 October 1992.
This publication is published in four volumes. TM 9-2320-272-24-1 contains chapters 1,2, and 3 (through
section IX). TM 9-2320-272-24-2 contains chapters 3 (sections X through XVI) and 4 (sections I through III).
TM 9-2320-272-24-3 contains chapter 4 (sections IV through XVI). TM 9-2320-272-24-4 contains chapters 5 and
6 and appendices A through H. Volume 1 contains a table of contents for the entire manual. Volumes 1,2, and 3
contain an alphabetical index covering tasks found in their respective volume. Volume 4 contains an
alphabetical index covering all tasks found in the entire manual.
CHAPTER 1
Section I.
Section II.
Section III.
CHAPTER 2
Section I.
Section II.
Section III.
Section IV.
CHAPTER 3
Section I.
Section II.
Section III.
Section IV
Section V.
Section VI.
Section VII.
Section VIII.
Section
IX
Section X.
Section XI.
Section XII.
Section XIII.
Section XIV
Section XV
Section XVI.
TABLE OF CONTENTS
VOLUME 1 OF 4
HOW TO USE THIS MANUAL
Page
........................................
v
INTRODUCTION
...................................................
l-l
General Information .
......................................................
l-l
Equipment Description and Data .
...........................................
l-5
Principles of Operation .
....................................................
l-25
SERVICE AND TROUBLESHOOTING INSTRUCTIONS
..................
2-l
Repair Parts; Tools; Special Tools; Test, Measurement,
and Diagnostic Equipment (TMDE); and Support Equipment .
.....................
2-l
ServiceUponReceipt .
.....................................................
2-l
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
........
2-2
UNIT TROUBLESHOOTING PROCEDURES
...........................
2-60
UNIT MAINTENANCE
..............................................
3-l
Engine System Maintenance .
...............................................
3-l
Air Intake System Maintenance .
............................................
3-41
Fuel System Maintenance .
.................................................
3-55
Exhaust System Maintenance .
..............................................
3-139
Cooling System Maintenance .
...............................................
3-149
Electrical System Maintenance .
.............................................
3-220
Transmission and Transfer Case Maintenance .
.................................
3-353
Propeller Shafts, Axles, and Suspension System Maintenance .
....................
3-403
Compressed Air and Brake System Maintenance .
...............................
3-476
Wheels, Hubs, Drums, and Steering Maintenance .
..............................
3-615
Frame Maintenance .
......................................................
3-683
Body, Cab, and Accessories Maintenance .
.....................................
3-730
Winch and Power Takeoff (PTO) Maintenance .
.................................
3-823
Special Purpose Bodies Maintenance .
........................................
3-869
Special Purpose Kits .
......................................................
3-968
Central Tire Inflation System (CTIS) Maintenance .
.............................
3-1231
ii
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