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INTRODUCTION
Page 5
EXPLANATION OF NUMERICAL
CODE
The organization of MACK service manuals has
been upgraded to standardize manual content
according to a reference system based on
component identification. The new reference
system will help link the information contained in
this publication with related information included
in other MACK service/warranty publications,
such as associated service bulletins, warranty
manuals, and MACK Service Labor Time
Standards.
The system is based on a numerical code, the
first digit of which identifies the general
component grouping as listed here:
GROUP 000 — GENERAL DATA
GROUP 100 — CHASSIS
GROUP 200 — ENGINE
GROUP 300 — CLUTCH, TRANSMISSION,
TRANSFER CASE AND PTO
GROUP 400 — STEERING, AXLES, WHEELS
AND TIRES, DRIVELINE
GROUP 500 — BRAKES, AUXILIARY
SYSTEMS
GROUP 600 — CAB, TRUCK BODY
GROUP 700 — ELECTRICAL
The second two digits of the three-digit code are
used to identify the system, assembly or
subassembly, as appropriate, within each of the
groupings. The codes applicable to this
publication are shown at the beginning of each
procedure, as necessary, to guide you to specific
component information.
Additionally, a two-character alpha code (i.e.,
[NV] RINGS, PISTON) may be referenced with
each procedure. This alpha code, in combination
with the three-digit Group number, identifies the
specific assembly, sub-assembly or part, and
directly relates to the first five positions of the
operation code listed in MACK Service Labor
Time Standards.
Examples:
Numerical Code
5_106_00.bk Page 5 Friday, August 4, 2000 11:17 AM
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