INTRODUCTION

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Appendix B: MAINTENANCE ALLOCATION CHART (MAC) 2-LM

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TM-9-2330-326-14-P Semitrailer Tactical Drop Deck BreakBulk/Container Transporter 22-1/2 TON M871A3NSN 2330-01-458-6865 Manual

Explanation of Columns in the MAC

TM 9-2330-326-14&P

B-1. INTRODUCTION (Cont.)

Maintenance Functions (Cont.)

Maintenance Functions are Limited to and Defined as Follows (Cont.):

Adjust. To maintain or regulate, within prescribed limits, by bringing into proper or exact position,

or by setting the operating characteristics to specified parameters.

Align. To adjust specified variable elements of an item to bring about optimum or desired

performance.

Calibrate. To determine and cause corrections to be made or to be adjusted on instruments of

test, measuring, and diagnostic equipment used in precision measurement. 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

maintenance 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 the assigned maintenance level is shown as the third

position code of the Source, Maintenance and Recoverability (SMR) code.

Repair. The application of maintenance services, including fault location/troubleshooting,

removal/installation, disassembly/assembly procedures, and maintenance actions to identify

troubles and restore serviceability to an item by correcting specific damage, fault, malfunction, or

failure in a part, subassembly, module (component or assembly), end item, or system.

NOTE

The following definitions are applicable to the "repair" maintenance

function:

Services--Inspect, test, service, adjust, align, calibrate, and/or

replace, and painting/spot painting.

Fault location/troubleshooting--The process of investigating and

detecting the cause of equipment malfunctioning; the act of

isolating a fault within a system or Unit Under Test (UUT.)

Disassembly/assembly--The step-by-step breakdown (taking

apart) of a spare/ functional group coded item to the level of its

least component, that is assigned a Source, Maintenance, and

Recoverability (SMR) code for the level of maintenance under

consideration (e.g., identified as maintenance significant.)

Actions--Welding, grinding, riveting, straightening, facing,

machining, and/or resurfacing.

B-2