TM 5-2420-224-20-2
G E N E R A L
A P P E N D I X B
M A I N T E N A N C E A L L O C A T I O N C H A RT
F OR
SMALL EMPLACEMENT EXCAVATOR (SEE)
A N D
HIGH MOBILITY MATERIAL HANDLER (HMMH)
Section I. INTRODUCTION
This Maintenance Allocation Chart (MAC) designates responsibility for performance of maintenance
repair functions at specified maintenance levels.
Section I is a general explanation and definition of terms.
Section II shows the maintenance level responsible and estimated work measurement time for specific
functions.
Section III lists common tool sets and the special tools, test, and support equipment required for
each maintenance function shown in Section II.
Section IV lists the remarks referenced in Section II.
EXPLANATION OF COLUMNS IN SECTION II
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.
Column 2, Component/Assembly. Column 2 contains the noun names of components, assemblies,
subassemblies, and modules for which maintenance is authorized.
Column 3, Maintenance Function. Column 3 lists the functions to be performed on the item listed
in Column 2.
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,
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