TM 10-4610-310 14
OPERATOR, UNIT, DIRECT AND GENERAL SUPPORT MAINTENANCE
LIGHTWEIGHT WATER
PURIFIER
MAINTENANCE ALLOCATION CHART (MAC)
INTRODUCTION
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 Maintenance Allocation Chart (MAC) 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:
Field includes two columns, Unit maintenance and Direct Support maintenance. The Unit maintenance
column is divided again into two more subcolumns, C for Operator or Crew and O for Unit maintenance.
Sustainment includes two subcolumns, general support (H) and depot (D)
The tools and test equipment requirements (immediately following the MAC) list the tools and test equipment
(both special tools and common tool sets) required for each maintenance function as referenced from the MAC.
The remarks (immediately following the tools and test equipment requirements) contain supplemental
instructions and explanatory notes for a particular maintenance function.
Maintenance Functions
Maintenance functions are limited to and defined as follows:
1. Inspect. To determine the serviceability of an item by comparing its physical, mechanical, and /or electrical
characteristics with established standards through examination (e.g., by sight, sound, or feel). This includes
scheduled inspections and gauging and evaluation of cannon tubes.
2. Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical characteristics
of an item and comparing those characteristics with prescribed standards on a scheduled basis, i.e., load
testing of lift devices and hydrostatic testing of pressure hoses.
3. Service. Operations required periodically o 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. This includes scheduled exercising and purging of recoil mechanisms. The following are examples
of service functions:
a. Unpack. To remove from packing box for service or when required for the performance of
maintenance operations.
b. Repack. To return item to packing box after service and other maintenance operations.
c.
Clean. To rid the item of contamination.
d.
Touch up. To spot paint scratched or blistered surfaces.
e. Mark. To restore obliterated identification.
4. Adjust. To maintain or regulate, within prescribed limits, by bringing into proper position, or by setting the
operating characteristics to specified parameters.
5. Align. To adjust specified variable elements of an item to bring about optimum or desired performance.
6. 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
0134 00-1
