FILTER/SEPARATOR, LIQUID FUEL, 50-, 100-, AND 350-GPM
MAINTENANCE ALLOCATION CHART INTRODUCTION
THE ARMY MAINTENANCE SYSTEM MAC
This introduction provides a general explanation of all maintenance and repair functions authorized at the two mainte-
nance levels under the Two-Level Maintenance System concept.
This 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 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 three subcolumns, Crew maintenance (C), Service maintenance
(O), and Field maintenance (F).
Sustainment includes two subcolumns, Below Depot (H) and Depot (D)
The tools and test equipment requirements (immediately following the MAC) list the tools and test equipment (both spe-
cial 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 are limited to and defined as follows:
Inspect. To determine the serviceability of an item by comparing its physical, mechanical, and/or electrical char-
acteristics with established standards through examination (e.g., by sight, sound, or feel). This includes scheduled
inspection and gagings and evaluation of cannon tubes.
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.
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. The following are examples of ser-
Unpack. To remove from packing box for service or when required for the performance of maintenance
Repack. To return item to packing box after service and other maintenance operations.
Touch up. To spot paint scratched or blistered surfaces.
Mark. To restore obliterated identification.