TM-9-2520-238-34
M113A1 FOV, M113A2 FOV, M548 AND M548A1
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL; RIGHT ANGLE DRIVE, COOLING FAN; GEARCASE, TRANSFER; DRIVE ASSEMBLY, FINAL; DIFFERENTIAL, STEERING CONTROL; BRAKE, SINGLE DISK; CYLINDER ASSEMBLY, HYDRAULIC BRAKE
TM-9-2520-238-34 - Page 8 of 319
TM 9-2520-238-34
HOW TO USE THIS MANUAL
HOW TO USE THIS MANUAL
This manual tells you how to perform direct and general support maintenance for transfer gearcases, final drives, cooling fan
right angle drives, steering differential control, single disk pivot brake and hydraulic brake master cylinder for the M113
Family of Vehicles.
Before starting a task or procedure, read HOW TO USE THIS MANUAL and GENERAL MAINTENANCE PROCEDURES
(WP 0014 00).
WHAT’S IN THE MANUAL — FRONT TO BACK
This TM supplement is divided into front and rear matter and Work Packages (WPs) for ease of use.
The WARNING SUMMARY section provides safety and first aid information. This section includes general warnings not
found in the TM text and a list of the most important detailed warnings extracted from the WPs. All of these warnings cover
hazards that could kill or injure personnel.
The TABLE OF CONTENTS lists the WPs.
CHAPTER 1 covers general introductory information. The Equipment Description WP gives a brief description of
components covered in this manual.
CHAPTER 2 covers troubleshooting procedures authorized at the DS/GS maintenance level.
CHAPTER 3 includes PMCS procedures.
CHAPTER 4 contains maintenance WPs for the cooling fan right angle drives.
CHAPTER 5 contains maintenance WPs for the transfer gearcases.
CHAPTER 6 contains maintenance WPs for the final drive assemblies.
CHAPTER 7 contains maintenance WPs for the steering control differential.
CHAPTER 8 contains maintenance WPs for the single disk pivot steer brake and the hydraulic master brake cylinder.
CHAPTER 9 contains supporting information for the TM which includes the following WPs:
The REFERENCES WP lists references to be used by personnel in operating and maintaining the carrier.
The COMMON TOOLS and SUPPLEMENTS and SPECIAL TOOLS/FIXTURES WP lists the tools used in the initial
setup.
The FABRICATED TOOLS WP lists instructions for making tools authorized to be fabricated at DS or GS maintenance
levels.
The EXPENDABLE/DURABLE SUPPLIES and MATERIALS lists the expendable supplies and materials used to
maintain or repair the carrier.
The INDEX is an alphabetical listing of all the tasks in the WPs of this TM. Each entry is cross-referenced to the WP number
and page number.
The back cover includes a METRIC CONVERSION CHART that can be used to convert U.S. customary measurements to
their metric equivalents. Measurements in this manual are given in U.S. customary unit with metric units in parentheses.
HOW TO USE THE WORK PACKAGES
How to find the WP you need
Pick a key word from the carrier part or system to be used during the WP. Look in the INDEX for this key word or the name
of the action you will perform. Turn to the page indicated.
The INDEX lists each WP under one or more headings.
How to read the WP
Be sure to read all
warnings
,
cautions
and
notes
. These are in all types of WPs. They help you avoid harm to yourself, other
personnel and equipment. They also tell you things you should know about the WP.
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