TM-9-2350-274-BD M109 Battlefield Damage Assessment and Repair Download
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TM 9-2350-274-BD ARMAMENT AND FIRE CONTROL Procedural Steps (Cont): 2. Clean any blocked gas ports, if accessible. 3. Measure and record dimensions of damaged area. NOTE If damage is extensive, clamp should be made same width as bore evacuator to ensure a proper seal. 4. Use acetylene torch to cut two 10- 1/2 inch long metal strips at least l-inch wider than damaged area. 5. Shape each metal band to fit curve of bore evacuator. When metal bands are placed around bore evacuator, a gap between 1/8 to 1/4-inch should exist between halves (see illustration). 6. Remove bands from bore evacuator and line inside surface of each band with asbestos paper or some other suitable fire resistant material. 7. Drill 3/8-inch evenly spaced holes in each end of both bands, set bands in place over damaged area. 10-5