The maintenance allocation portion of this manual assigns maintenance functions and repair operations to be
performed by the lowest appropriate maintenance echelon.
Columns in the maintenance allocation chart are as follows:
(1) Part or component. This column shows only the nomenclature or standard item name. Additional
descriptive data is included only where clarification is necessary to identify the part. Components and parts
comprising a major end item are listed alphabetically. Assemblies and sub-assemblies are in alphabetical
sequence with their components listed alphabetically immediately below the assembly listing.
(2) Maintenance function. This column indicates the various maintenance functions allocated to the echelon
capable of performing the operations. These are as follows:
to preserve, and
to replenish fuel and lubricants.
(b) Adjust. To regulate periodically to prevent malfunction.
(c) Inspect. To verify serviceability and to detect incipient electrical or mechanical failure by scrutiny.
(d) Test. To verify serviceability and to detect incipient electrical or mechanical failure by use of special
equipment such as gages, meters, etc.
(e) Replace. To substitute serviceable assemblies, subassemblies, and parts for unserviceable
(f) Repair. To restore to a serviceable condition by replacing unserviceable parts or by any other action
required utilizing tools, equipment, and skills available, to include welding, grinding, riveting,
straightening, adjusting, etc.
(g) Align. Too adjust two or more components of an electrical system so that their functions are properly
(h) Rebuild. To restore to a condition comparable to new by disassembling the item to determine the
condition of its component parts and reassembling it using serviceable, rebuilt, or new assemblies,
subassemblies, and parts.
(3) 1st, 2d, 3d, 4th, 5th echelon. The symbol X indicates the echelon responsible for performing that particular
maintenance operation, but does not necessarily indicate that repair parts will be stocked at that level.
Echelons higher than the echelon marked by X are authorized to perform the indicated operation.
(4) Tools required. This column indicates codes assigned to each individual tool equipment, test equipment,
and maintenance equipment referenced. The grouping of codes in this column of the maintenance allocation
chart indicate the tool, test, and maintenance equipment required to perform the maintenance function.
(5) Remarks. Entries in this column will be utilized when necessary to clarify any of the data cited in the
Columns in the section allocating tools for maintenance functions are defined as follows:
(1) Tools required for maintenance functions. This column lists tools, test, and maintenance equipment
required to perform the maintenance functions.
(2) 1st, 2d, 3d, 4th, 5th echelon. A dagger (t) symbol indicates the echelons allocated the facility.
(3) Tool code. This column lists the tool code assigned.
8. Maintenance by Using Organizations
When this equipment is used by signal service organizations organic to theater headquarters or communication
zones to provide theater communications, those maintenance functions allocated up to and including fourth echelon are
authorized to the organization operating this equipment.