TM-9-2350-358-BD M109A6 Battlefield Damage Assessment and Repair Download
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TM 9-2350-358-BD 12-7. BORE EVACUATOR DAMAGE - CONTINUED Materials/Tools: • Welding equipment • Grinder • Sheet metal, 1/4-inch thick (size dependent on damage) (scavenge from available source) • Wire brush Procedural Steps: 1. Use acetylene torch and grinder to cut and remove any burrs or protruding metal edges from damaged bore evacuator. 2. Clean any blocked gas ports, if accessible. 3. Measure and record dimensions of damaged area (items B and C). 4. Use acetylene torch to cut a patch from sheet metal 1/4 to 1/2-inch larger than damaged area (Items A and D). 5. Shape patch to fit curve of bore evacuator. 6. Wire brush both mating surfaces. CAUTION If arc welding cab, ground welding equipment to cab only. Parts of slipring and race bearings can be damaged from high currents conducted between hull and cab. If welding equipment is not grounded correctly. 12-8