perform, you keep the vehicle operational. You ensure that you and your unit can
perform its mission and maintain unit readiness at a high level.
Even with all
maintenance being performed correctly and on time, components are going to fail.
There is nothing you can do to prevent this.
When this occurs, another of your
maintenance skills that comes into focus is troubleshooting. There are three basic
skills you must possess to be an effect troubleshooter:
o Knowing the system; every component in the system has a purpose. Know their
purpose, construction, and operating characteristics. Know the capabilities
o Following a systematic troubleshooting process.
o Recognizing the trouble indications; this ability is usually acquired with
When you are troubleshooting the system and find the fault, you must know how to
correct the fault.
This can be done in one of several ways:
disassembly, and repairing the fault in a component.
Before you can perform
maintenance on the M992 Ammunition Carrier conveyor assembly, you must be familiar
with the vehicle and the conveyor assembly.
PART A - INTRODUCTION, DESCRIPTION, AND FUNCTION OF
THE CONVEYOR ASSEMBLY
The M992 Carrier, Ammunition, Tracked (CAT), is a field artillery ammunition
support vehicle, comparable in terms of speed, mobility, and survivability to the
M109A2 and M110A2 families of artillery weapons which it supports. The M992 is a
highly mobile and maneuverable full-tracked, self-propelled, diesel powered vehicle
that transports 155mm artillery projectiles and charges from the ammunition depots
and supply points to the howitzers in the 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
The M992 also has an auxiliary power unit (APU) that
supplies enough power to run the vehicle's electrical system and that of a
supported vehicle via the use of slave cables and receptacles. The APU also powers
the primary hydraulic pump which supplies hydraulic fluid to all hydraulic