TM-9-2350-358-BD M109A6 Battlefield Damage Assessment and Repair Download
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TM 9-2350-358-BD SECTION III. CANNON ASSEMBLY 12-6. GUN TUBE INTERCHANGEABILITY General Information: Gun tubes and mounts sustain damage easily in a combat environment which may prevent fire missions. A wrecker, block and tackle or improvised lifting device may be used to assist Interchanging them. The 155MM gun of the M109A6 vehicle is interchangeable only with the M109A5 Interchangeability Information Vehicle Tube Mount M109A5 M284 M182 12-7. BORE EVACUATOR DAMAGE General Information: As a round is propelled through the gun tube, gas pressure is forced inside the bore evacuator. As the round leaves the tube, bore evacuator pressure rushes out behind the round, exhausting excessive smoke and fumes. If the evacuator is damaged or leaks, this pressure is lost, causing excessive smoke and fumes to enter the cab as the breech block opens. This procedure repairs puncture damage to the bore evacuator. Option 1: Fabricated clamp. Limitations: None Personnel/Time Required: • 1 soldier • 1.0 hour Other Options: • Open cab hatches and turn on crew blower. • Ensure lead filter is ON. Materials/Tools: • Acetylene torch • Suitable fire resistant material (scavenge from available source) • Grinder • Hexagon head nut, 3/8-inch (as required) (scavenge from available source) • Lockwashers (as required) (scavenge from available source) • Machine screws, 3/8-inch (as required) (scavenge from available source) • Sheet metal, 1/4-inch thick, about 21 inches long and wide enough to overlap damage (scavenge from available source) • Drill 12-5