The material contained in this lesson was derived from the
Maintenance, when properly performed, ensures an item of equipment will
perform the mission for which it is designed. Personnel responsible for the
proper maintenance of the M992 Ammunition Carrier must be knowledgeable and
properly trained to accomplish the maintenance and repair of such equipment
that plays a critical role in support of the U.S.
Army artillery firing
missions. As a Self-propelled Field Artillery System Mechanic, MOS 63D, you
are ultimately responsible for ensuring the APU of the M992 Ammunition
Carrier is capable of performing the mission for which it was designed.
PART A - INTRODUCTION TO THE M992 CARRIER, AMMUNITION,
The M992 Carrier, Ammunition, Tracked is a field artillery ammunition
support vehicle and is comparable, in terms of speed, mobility, and
survivability, to the M109A2 and M110A2 family of artillery weapons that it
The M992 is a full-tracked, self-propelled, diesel powered
vehicle and is highly mobile and maneuverable. The vehicle transports 155mm
artillery projectiles and charges from ammunition depots and supply points
to the howitzers in field locations. The M992 features ammunition handling
equipment (AHE), which includes a hydraulically-operated conveyor, stacker,
and projectile rack assemblies which have a stowage capacity of 90 155mm
The Auxiliary Power Unit is another feature of this vehicle.
supplies enough power to operate the electrical system of its parent vehicle
and the electrical system of a supported vehicle by use of slave cables and
receptacles. The APU also powers the primary hydraulic pump that supplies
hydraulic fluid to all hydraulic circuits. Without the use of the APU, the
ammunition handling aspect of the M992 Carrier would be seriously reduced
due to a decrease in electrical and hydraulic power.
There are some
differences in vehicles depending on