General Information 00 Maintenance Operation Sets Tables: 00–08 Maintenance Operation Sets for Groups 46 through 83 REQUIRED MAINTENANCE OPERATION SET IM M1 M2 M3 M4 M5 83–01 Air Conditioner Checking, R–12 and R–134a Refrigerant Systems Maintenance Operation Number and Operation Description Table 13, Maintenance Operation Sets for Groups 46 through 83 Business Class Trucks Maintenance Manual, February 2004 00/15