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![]() ![]() TM 9-2320-312-24-2
NOTE
If at any time you are unsure how to use this manual or you cannot locate the information you need, notify
your supervisor.
INTRODUCTION
1.
This manual is designed to help you perform Unit, Direct Support, and General Support Maintenance on the M878A2
Yard Tractor.
2.
The Repair Parts and Special Tools List (RPSTL), TM 9-2320-312-24P, is to be used in conjunction with this manual, to
locate and obtain the repair parts and special tools needed to maintain this equipment.
3.
This manual consists of three volumes: Volume 1 contains maintenance and troubleshooting for yard tractor components
NOT covered in the Commercial Service Manuals. Volumes 2 and 3 are a compilation of Commercial off-the-Shelf
(COTS) Service Manuals.
4.
A Table of Contents at the front of Volume 1 lists the contents of all volumes of this publication. Each volume also con-
tains a Table of Contents for that particular volume.
5.
Volume 1 is written in work package format, in accordance with MIL-STD-40051A:
a.
Chapters divide the manual into major categories of information (e.g. Introductory Information with Theory of
Operation, Troubleshooting Procedures, Unit Maintenance, Direct Support Maintenance, General Support Main-
tenance, and Supporting Information).
b.
Each Chapter is divided into work packages, which are identified by a 6-digit number (e.g. 0001 00, 0002 00, etc.)
located on the upper right-hand corner of each page. The work package page number (e.g. 0001 00-1, 0001 00-2,
etc.) is located centered at the bottom of each page.
If a Change Package is issued to this manual, added work packages use the 5th and 6th digits of their number to
c.
indicate new material. For instance, work packages inserted between WP 0001 00 and WP 0002 00 are numbered
WP 0001 01, WP 0001 02, etc.
6.
Volumes 2 and 3 are provided in commercial format.
7.
Scan through all volumes of this manual to become familiar with their organization and contents before attempting to
maintain the equipment.
ORGANIZATION OF MATERIAL
1.
Maintenance procedures in each volume are sequenced in accordance with the following major assembly groups, as out-
lined in the Maintenance Allocation Chart (MAC) in Volume 1:
a.
Group 020--engine
b.
Group 040--fuel
c.
Group 050--exhaust
d.
Group 060--cooling
e.
Group 070--transmission
f.
Group 080--front axle (includes front axle steering components and front service brakes)
g.
Group 090--rear axle (includes rear service brakes)
h.
Group 110--steering
i.
Group 115--frame
j.
Group 120--propshaft
k.
Group 140--cab and sheet metal
l.
Group 150--air piping and brake
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