Figures listed as numbers only, i.e., 1, 3, 5, etc., are in the
text. Figure numbers with an "F" after them, i.e., 1F, 2F, 3F,
etc., are found in Appendix B.
As an Army maintenance provider assigned to the M992 you are dedicated to
giving it the best possible maintenance.
Through the preventive
maintenance checks and services (PMCS) that you perform, you keep the
vehicle operational. Even with all the maintenance you perform 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 comes
into focus: troubleshooting. Troubleshooting is one of the maintenance
skills at which you must remain proficient. There are three basic skills
you must possess to be an effective troubleshooter:
o Knowing the system; every component in the system has a purpose.
Know their purpose, construction, and operating characteristics.
Know the capabilities of the system and the correct operating
o Following a systematic troubleshooting process.
o Recognizing trouble indications; you will acquire this ability
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:
replacement, or disassembly and repairing the fault in the component.
Before you can perform any maintenance on the M992 Ammunition Carrier
primary/backup hydraulic system, you must be familiar with the vehicle
and the hydraulic system.
PART A - INTRODUCTION TO THE M992
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.
It transports 155mm
artillery projectiles, and charges from the ammunition depots and supply