TM 5-5420-228-24
OVERHAUL. That maintenance effort (service/action) necessary to restore an item to
j.
a completely serviceable/operational condition as prescribed by maintenance standards (i.e.,
DMWR) in appropriate technical publications. Overhaul is normally the highest degree of
maintenance performed by the Army. Overhaul does not norm ally return an item to like new
condition.
k. REBUILD. Consists of those service/actions necessary for the restoration of unser-
viceable equipment to a like new condition in accordance with original manufacturing
standards. Rebuild is the highest degree of materiel maintenance applied to Army equipment.
The rebuild operation includes the act of returning to zero those age measurements (hours/-
miles, etc. ) considered in classifying Army equipments/components.
B.3. Column entries. Columns used in the maintenance allocation chart will be limited to those
shown. Entries for these columns are explained below:
a. COLUMN 1. Group Number, Column 1 list 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 compon-
ents, assemblies, subassemblies and modules for which maintenance is authorized.
c. COLUMN 3. Maintenance Functions. Column 3 lists the functions to be performed on
the item listed in Column 2.
d. COLUMN 4. Maintenance Category. Column 4 specifies, by the listing of a "work
time" figure in the appropriate subcolumn(s), the lowest 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 category of maintenance. If the number or
complexity of the tasks within the listed maintenance function vary at different maintenance
categories, appropriate "work time" figures will be shown for each category. The number of
man-hours specified by the "work time" figure represents the average time required to restore
an item 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 maintenance allocation chart.
e.
COLUMN 5. Tools and Equipment. Column five (5) specifies by code, those common
tool sets and special tools, test, and support equipment required to perform the designated
function.
f. COLUMN 6. Remarks. Column six (6) contains an alphabetic code which leads to the
remark in section IV, Remarks, which is pertinent to the item opposite the particular code.
B-4. Column Entries Used in Tool and Test Equipment Requirements.
a. COLUMN 1. Tool or Test Equipment Reference Code. The tool or test equipment
reference code correlates with maintenance function on the identified end item or component.
b. COLUMN 2. Maintenance Level. The lowest level of maintenance authorized to use
the tool or test equipment.
c. COLUMN 3. Nomenclature. Name or identification of the tool or test equipment.
d. COLUMN 4. National/NATO Stock Number. The National or NATO stock number of
the tool or test equipment.
e.
COLUMN 5. Tool Number. The manufacturer's part number.
B-5. Explanation of Columns in Remarks, Section IV.
COLUMN 1. Reference Code. The code recorded in column 4, section II.
a.
b. COLUMN 2. Remarks. This column list information pertinent to the maintenance
level being performed as indicated in the MAC, section II, column 4.
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