TM 9-2350-256-20-2
UNIT MAINTENANCE
RECOVERY VEHICLE, FULL TRACKED: MEDIUM, M88A1
NSN 2350-00-122-6826, EIC AQA
INTRODUCTION TO MAINTENANCE ALLOCATION CHART (MAC)
The Army Maintenance System MAC
This introduction provides a general explanation of all maintenance and repair functions authorized at various maintenance
levels under the standard Army Maintenance System concept.
The MAC (WP 0488 00) designates overall authority and responsibility for the performance of maintenance functions on the
identified end item or component. The application of the maintenance functions to the end item or component will be consistent
with the capacities and capabilities of the designated maintenance levels, which are shown on the MAC in column 4 as:
1.
Unit--includes two subcolumns, C (Operator/Crew) and O (Unit) Maintenance.
2.
Direct Support--includes an F subcolumn.
3.
General Support--includes an H subcolumn.
4.
Depot--includes a D subcolumn.
A lists of tools and test equipment required for each maintenance function immediately follows the MAC.
Maintenance Functions
Maintenance functions are limited to and defined as follows:
Inspect
To determine the serviceability of an item by comparing its physical, mechanical, and/or electrical characteristics with estab-
lished standards through examination (e.g., by sight, sound, or feel).
Test
To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical characteristics of an item and compar-
ing those characteristics with prescribed standards.
Service
Operations required periodically to keep an item in proper operating condition, e.g., to clean (includes decontaminate, when
required), to preserve, to drain, to paint, or to replenish fuel, lubricants, chemical fluids, or gases.
Adjust
To maintain or regulate, within prescribed limits, by bringing into proper 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 or 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 services 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.
0487 00-1
