User Manual

Page viii
EXPLANATION OF NUMERICAL CODE
EXPLANATION OF 3-DIGIT
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 the TS477 Service Labor Time
Standards Manual.
The system is based on a numerical code
, the
first digit of which identifies the general
component grouping as listed here:
GROUP 000 — INSPECTIONS
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 3-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 TOP OF EACH
PAGE and at SECTION HEADINGS, as
necessary, and may also appear in the TABLE
OF CONTENTS, to guide you to specific
component information.
Additionally, a two-character alpha code (i.e.
[NV] RINGS, PISTON) is shown with each
operation. This alpha code, in combination with
the three-digit Group number, identifies the
specific assembly, subassembly or part, and
directly relates to the first five positions of the
operation code listed in the Service Labor Time
Standards Manual, TS477.
Examples:
200976a
212 NV 2J 53
Base Operation
Cylinder Block Moving Parts
Rings, Piston
MACK E7
Replace (one piston)
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