1-1.1 Cautions and warnings. You will find CAUTIONS and WARNINGS in this manual.
WARNINGS are to advise you to be particularly careful in order to avoid personal injury accidents.
CAUTIONS are provided to prevent you from making an error which could result in damage to the vehicle and
could possibly cause personal injury or property damage.
Read this manual before operating vehicle.
This manual will familiarize you with your vehicle and provide sufficent information to perform minor services
necessary for continued efficient operation. Study this manual carefully before you operate the vehicle.
1-2 COMPONENT CODE NUMBERS
1-2.1 Codes are the basis for identifying the components used on Navistar trucks. They are used by sales personnel
ordering the truck, by manufacturing to build that truck and by parts personnel to service the truck. Many items in this
manual are identified by codes or by model. Therefore, it is important to understand their meaning.
1-2.2 THE CODE STRUCTURE IS AS FOLLOWS:
00 000 0000
All International truck parts are
divided into 17 groups, numbered
from 01 to 17. Code sheets in
numbers 17 through 22 for wheels,
rims and related items.
Unit numbers identify the various
components within a group. These
unit numbers are also used as
significant, as in rear axles, where
the first digit of the unit number
indicates the type of axle: 0 for
single reduction, 1 for two-speed, 2
for a double reduction and 3 or 4
for a tandem.
This number may indicate model
differences, different sources of
supply, manufacture at different
applications or design changes.
You will need this assignment
number only in the few cases
where the service parts catalog
assignment numbers. In all other
cases you can ignore these last