front.fr5 Page viii Friday, March 17, 2006 11:04 AM EXPLANATION OF 3-DIGIT NUMERICAL CODE GROUP 4 00 — STEERING, AXLES, WHEELS AND TIRES, DRIVELINE GROUP 5 00 — BRAKES, AUXILIARY SYSTEMS GROUP 6 00 — CAB, TRUCK BODY GROUP 7 00 — ELECTRICAL 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 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. The system is based on a numerical code, the first digit of which identifies the general component grouping as listed here: GROUP 0 00 — INSPECTIONS GROUP 1 00 — CHASSIS GROUP 2 00 — ENGINE GROUP 3 00 — CLUTCH, TRANSMISSION, TRANSFER CASE AND PTO 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: 212 NV 2J 53 Base Operation Rings, Piston MACK E7 Replace (one piston) 200976a Page viii EXPLANATION OF NUMERICAL CODE tion lock Movin ton k Movin g Parts