TM-5-2350-378-24-P
HYDRAULIC DIAGNOSTIC CENTER (HDC) SUPPORTING ARMORED COMBAT EARTHMOVER (ACE), M9
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
TM-5-2350-378-24-P - Page 11 of 790
TM 5--2350--378--24&P
iv
HOW TO USE THIS MANUAL
HOW TO USE THIS MANUAL
This manual describes hydraulic troubleshooting test procedures and tells you how to perform unit maintenance for
the M9, Armored Combat Earthmover (ACE) HDC System.
Before starting a task or procedure, make sure you have read this HOW TO USE section and the General Mainte-
nance Procedures Work Package.
WHAT’S IN THE MANUAL
This TM is divided into chapters and front and rear matter. The chapters are further divided into 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 detail warning extracted from the WPs. All of these warnings
cover hazards that could kill or injure personnel.
The TABLE OF CONTENTS lists the WPs in each chapter.
CHAPTER 1 covers General Information, Equipment Description and Data, and Theory of Operation. The Equipment
Description WP gives a brief description of major parts and features of the HDC system. The Theory of Operation WP
provides information that will help you understand how the components work.
CHAPTER 2 contains WPs on an introduction on how to use HDC system troubleshooting, troubleshooting with the
HDC system installed, and WPs on locating faults and causes e of Hydraulic malfunctions.
CHAPTER 3 includes an introduction to Preventative Maintenance Checks and Services (PMCS), PMCS instructions
and other maintenance WPs. These WPs contain the maintenance procedures authorized at the unit level.
CHAPTER 4 provides a Parts Information introduction, Repair Parts List, NSN Index and P/N Index WPs.
CHAPTER 5 covers supporting information for the TM. It includes the following WPs:
The References WP list references to be used by personnel in maintaining the HDC system. These refer-
ences include technical manuals and other publications.
The MAINTENANCE ALLOCATION CHART (MAC) WP contains a listing for M9 ACE HDC system.
The EXPENDABLE AND DURABLE ITEMS WP lists expendable and durable supplies and materials used to
maintain the M9 ACE HDC system.
The TOOL IDENTIFICATION LIST WP includes those tools used to maintain or repair the M9 ACE HDC sys-
tem.
The MANDATORY REPLACEMENT PARTS WP is a listing of all items that must be replaced during repair or
replacement of the M9 ACE HDC system.
REAR MATTER includes DA FORM 2028 used to report errors and to recommend improvements for procedures in
this manual, the Authentication Page and Foldout pages.
USING YOUR MANUAL ON THE JOB
The best way to learn about this manual is to practice using it. Knowing how to use this manual will save both time
and energy.
HOW TO USE THE WORK PACKAGES
How to read the WP
Pay attention to all WARNINGS, CAUTIONS, and NOTES. These can appear in all types of procedures. They help
you avoid harm to yourself, other personnel, and equipment. They also tell you things you should know about the pro-
cedure.
Back to Top
