ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
SUPPORTING INFORMATION
MAINTENANCE ALLOCATION CHART (MAC)
INTRODUCTION
This Work Package provides the Maintenance Allocation Chart (MAC) for the TWPS, excluding the
Government-furnished equipment (GFE).
Refer to TM 9-6115-645-24 (Marine Corps TM
09244A/09245A-24/2) for the MAC and other maintenance information for the Tactical Quiet Generator
(TQG). Refer to TM 10-6630-222-12&P for the MAC and other maintenance information for the Water
Quality Analysis Set: Purification (WQAS-P) (Army only).
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 (immediately following this introduction) 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 shall 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 inspection and gagings 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 (e.g., load testing of lift devices and hydrostatic testing of pressure hoses).
3. 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. This includes scheduled exercising and purging of recoil
mechanisms.
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