TM-9-2520-272-40
CROSS-DRIVE TRANSMISSION WITH CONTAINER MODEL X200-4A
TECHNICAL MANUAL; SUSTAINMENT MAINTENANCE MANUAL
FEBRUARY 2012
TM-9-2520-272-40 - Page 27 of 620
TM 9-2520-272-40
HOW TO USE THIS MANUAL
SCOPE
This manual has been prepared to tell you how to perform Sustainment Maintenance on the Allison
Transmission Cross-Drive Transmission, Model X200-4A. Your success in accomplishing your assigned
tasks depends very much upon how well you learn to use this manual.
You must make yourself familiar with every part of the manual before beginning any
troubleshooting or maintenance assignments.
It is particularly important for you to understand and remember the contents of Chapter 3, WP 0067,
General Maintenance Information, before doing any work on the transmission.
You must familiarize yourself with all steps in a maintenance procedure be-
fore beginning the maintenance task.
FOLLOWING THE FRONT COVER
Warnings are placed in the manual when you are about to do something that could injure or kill you
or someone else. Always take the precautions described in the warnings. A summary of warnings
used throughout the manual begins following the front cover of the manual. For your safety and the
safety of others around you, be sure you understand all of these warnings.
TABLE OF CONTENTS
The Table of Contents lists the main subjects of the manual and shows the Work Package number where
each begins. These main subjects are made up of Chapters and the Glossary.
INTRODUCTION
The General Information work package (WP 0001) to the manual provides you with an introduction to the
transmission. WP 0002, Equipment Description and Data, pictorially identif es the major assemblies and
subassemblies of the transmission. WP 0003 provides the theory of operation.
In WP 0001, you will f nd the Nomenclature Cross-Reference List. Sometimes a part is generally
known by a common name which is not the same as the formal name used in the associated Repair
Parts and Special Tools List (RPSTL), which is TM 9-2520-272-40P for this transmission. When
maintenance procedures use the common name for a part, the Nomenclature Cross-Reference List
will usually provide the formal name for the part as shown in the RPSTL.
For example, the name used by maintenance personnel for the hydrostatic pump and motor assembly
is “hydrostat.” The RPSTL calls this unit “hydrostatic pump and motor assembly.” If you were to look in
the RPSTL for “hydrostat” and did not f nd it, then you would go to the Nomenclature Cross-Reference
List (WP 0001) to determine what the part is called in the RPSTL.
There are a few common terms which will not appear in the Nomenclature Cross-Reference List and they
will not appear in the RPSTL. One of these terms is “range pack,” meaning all of the parts in one area
of the transmission (mostly clutch assemblies) that function individually or collectively to vary the speed
and power output or to change forward-reverse direction. Since the term “range pack” is a collective term
applying to several parts and assemblies in the RPSTL, it has no specif c RPSTL equivalent. Therefore,
the term “range pack” will appear in the Glossary only. If you encounter a term which is not shown in
the Nomenclature Cross-Reference List or the RPSTL, check the Glossary.
EQUIPMENT DATA
The Equipment Data section (WP 0002) provides particulars about the transmission such as input horsepower,
ratios of forward and reverse ranges, oil capacity, transmission weight, and Usable on Codes (UOCs).
xvii
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