EXPLANATION OF COLUMNS IN SECTION II, MAINTENANCE ALLOCATION CHART FOR M101 AND M116 SERIES TRAILERS

TM 9-2330-202-14&P

B-2.

MAINTENANCE FUNCTIONS (CONTINUED).

Calibrate. To determine the accuracy of and cause corrections or adjustments to be made on instruments

or test, measuring, and diagnostic equipment (TMDE) used in precision measurement. Calibration consists

of comparisons of two instruments, one of which is a certified standard of known accuracy, to detect and

adjust any discrepancy in the accuracy of the instrument being compared.

Remove/Install. To remove and install the same item when required to perform service or other mainte-

nance functions "Install"' may be the act of emplacing, seating, or fixing into position a spare, repair part, or

module (component or assembly) in a manner to allow the proper functioning of an equipment or system.

Replace. To remove an unserviceable item and install a serviceable counterpart in its place. "Replace" is

authorized by the MAC and is shown as the third position of the source, maintenance, and recoverability

(SMR) code.

Repair. To apply maintenance services--including fault location/troubleshooting, removal/installation, and

disassembly/assembly procedures--and maintenance actions to identify troubles and restore serviceability

to an item by correcting any specific damage, fault, malfunction, or failure in a part, subassembly, module

(component or assembly), end item, or system.

Overhaul. To perform that maintenance effort (service/action) required to restore an item to a completely

serviceable/operational condition as required by maintenance standards in an appropriate technical publi-

cation (e.g., depot maintenance work requirement). Overhaul is normally the highest degree of mainte-

nance performed by the Army. Overhaul does not normally return an item to like-new condition.

Rebuild. To perform those services/actions necessary for the restoration of unserviceable 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 equipment/components.

EXPLANATION OF COLUMNS IN SECTION II, MAINTENANCE ALLOCATION

CHART FOR M101 AND M116 SERIES TRAILERS.

(1) Group Number. Column 1 lists functional group code numbers, whose purpose is to identify mainte-

nance significant components, assemblies, subassemblies, and modules with the next higher assembly.

The end item group number is "00."

(2) Component/Assembly. Column 2 contains the names of components, assemblies, subassemblies,

and modules for which maintenance is authorized.

(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 para B-2.)

(4) Maintenance Level. Column 4 specifies, by the listing of a work-time figure in the appropriate subcol-

umn(s), the level of maintenance authorized to perform the function listed in Column 3. This figure repre-

sents the active time required to perform that maintenance function at the indicated level of maintenance. If

the number or complexity of the tasks within the listed maintenance function varies at different mainte-

nance levels, appropriate work-time figures will be shown for each level. 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 (including

B-2