MAINTENANCE ALLOCATION CHART
FOR HYDRAULIC EXCAVATOR 230LCR AND 230LCRD
Section I. INTRODUCTION
This Maintenance Allocation Chart (MAC) designates responsibility for performance of maintenance repair
functions at specified levels.
a. Section I. INTRODUCTION. This is a general explanation and definition of terms.
b. Section II. MAINTENANCE ALLOCATION CHART. This listing shows the maintenance
level responsible and estimated work measurement time for specific functions.
c. Section III. TOOLS AND TEST EQUIPMENT REQUIREMENTS. This section lists common
tool sets and the special tools, test, and support equipment required for each maintenance function shown in
d. Section IV. REMARKS. This lists the remarks referenced in Section II.
B-2. EXPLANATION OF COLUMNS IN SECTION II
a. Column (1) Group Number. Column 1 lists group numbers, the purpose of which is to identify
components, assemblies, subassemblies, and modules with the next higher assembly.
b. Column (2) Component/Assembly. Column 2 contains the noun names of components,
assemblies, subassemblies, and modules for which maintenance is authorized.
c. Column (3) Maintenance Function. Column 3 lists the functions to be performed on the item
listed in Column 2. (For a detailed explanation of these functions refer to "Maintenance Functions"
d. Column (4) Maintenance Level. Column 4 specifies, by the listing of a "work time" figure in
the appropriate subcolumn(s), the level of maintenance authorized to perform the function listed in Column
3. This figure represents the active time required to perform that maintenance function at the indicated level
of maintenance. If the number or level of the tasks within the listed maintenance function vary at different
maintenance levels, appropriate work time figures will be shown for each level. The number of man-hours
specified by the work time figure represents the average time required to restore an item (assembly,
subassembly, component, module, end item, or system) to a serviceable condition under typical field
operating conditions. This time includes preparation time, troubleshooting time and quality
assurance/quality control time in addition to the time required to perform the specific tasks identified for
the maintenance functions authorized in the MAC. This figure does not include any time for performance
of preliminary tasks listed elsewhere in the MAC; e.g., removal of engine under repair of fuel pump, when
the engine is listed separately in the MAC. The symbol designations for the various maintenance categories
remain as follows:
Direct Support Maintenance
General Support Maintenance