TM-9-2350-358-BD
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A6
TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT SUPPORT MAINTENANCE
MARCH 1994
TM-9-2350-358-BD - Page 262 of 343
TM 9-2350-358-BD
SECTION IV.
SIGHTING EQUIPMENT
12-8.
GENERAL
WARNING
RADIOACTIVE MATERIAL(S)
TRITIUM (HYDROGEN-3) GAS
Handle with care in the event the radioluminous source is broken, cracked or there is no
illumination, immediately refer to warning page inside front cover of manual.
The sighting equipment are essentially aids to improve the accuracy speed of armament firing operations.
12-9.
SIGHTING EQUIPMENT DAMAGE
General Information:
The quickest method of repair for damaged sighting equipment may be to cannibalize replacement from disabled vehicles.
There are some minor differences in certain sighting equipment of the vehicles listed below, but they will function.
Cannibalize the required sighting equipment from another vehicle as available.
Sighting equipment of the M109A6 are
interchangeable with those of the following vehicles.
A.
M1A1/A2 Gunner’s Quadrant: M109 thru M109A5 and M110
B.
M1A1 Collimator: M109 thru M109A5 and M110
C.
M140 Alignment Device: M109 thru M109A5 and M110
D
M117A1/A2 Panoramic Telescope: M109thru M109A5
E.
M145A1 Mount: M109thru M109A5
SECTION V.
COMPOSITE ARMOR
12-10. GENERAL
To improve the survivability of the M109A6 composite armor is used.
12-11. ARMOR, PENETRATED
General Information:
The M109A6 has three types of armor composite, permanent, and removeable BDR to the permanent armor of the hull
and cab is limited to improvised patching, using bolt-on type repairs, welding, or the polymer kit found In the BDR kit.
The
removable armor, such as fenders and covers, can be removed and replaced with fabricated substitutes.
12-10
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