EXPLANATION OF NUMERICAL CODE GROUP 4 00 — STEERING, AXLES, WHEELS AND TIRES, DRIVELINE The organization of MACK service manuals has been upgraded to standardize manual content according to a reference system based on component identification. The reference system helps 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.
GROUP 5 00 — BRAKES, AUXILIARY SYSTEMS GROUP 6 00 — CAB, TRUCK BODY GROUP 7 00 — 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. The system is based on a numerical code, the first digit of which identifies the general component grouping as listed here: Additionally, a two-character alpha-code (i.e., [GA] CASE, MAIN) may be shown with each operation.
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. GROUP 0 00 — GENERAL DATA GROUP 1 00 — CHASSIS GROUP 2 00 — ENGINE GROUP 3 00 — CLUTCH, TRANSMISSION, TRANSFER CASE AND PTO Example of Numerical Code Page 5 INTRODUCTION