must look for the following conditions when inspecting the AFES components:
Cracked, damaged, or deteriorated hoses, tubing, or ducting.
Frayed, broken, or deteriorated electrical leads.
Broken, damaged, or loose retainer straps and brackets.
Indications of shorted electrical circuits at terminal boards or at
o Missing or damaged fasteners and related hardware.
o Cylinder bottles for proper pressures.
o Any unusual or suspicious conditions.
REMEMBER, as you proceed into the actual removal, inspection, and
installation process, comply with all safety and warning precautions. Work
carefully and methodically and do not, under any circumstance, take chances.
There is no substitute for good, reliable, and quality work. Always refer
to the applicable technical manual rather than using "guess work". Remember
to use the proper tool for the job.
Use of the wrong tool may cause
personal injury, damage to equipment, or prolong the time required to
complete the job assignment.
Using the material in the subsequent paragraphs, you will learn the methods
used for removal, inspection, and installation of the AFES components.
Engine AFES - Engine Compartment Fire Sensing Elements.
Before attempting to remove the engine AFES sensing elements from the engine
compartment, the following steps must be taken:
a. Using the deactivation process outlined in Part C - Deactivation/
Reactivation of the AFES, turn the engine T/A panel MAINTenance switch to
the OFF (vertical) position (reference to Figure 10).
Ensure the locking
pin is installed in the valve actuator guard of engine extinguisher cylinder
bottle no. 1 and install the locking pin in valve actuator guard of engine
extinguisher cylinder bottle no. 2 (Item 5, Figure 11).
powerpack (engine, transfer, and transmission as a unit) must be removed.
This task requires the assistance of a Self-Propelled Field Artillery System
Mechanic, MOS 63D. Before removal of the powerpack, the engine deck cover
must be removed.
Before removing the engine deck cover, disconnect the
thermal wires from the fire sensing elements. Once the sensing elements are
disconnected from the deck cover, the engine deck cover and powerpack
removal may be accomplished.
Before removal of the fire sensing elements
clean the engine