TM-9-2350-275-BD Battlefield Damage Assessment and Repair for M113 Family Download
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TM 9-2350-275-BD ENGINE 3-16. ENGINE/TRANSMISSION HOUSING DAMAGE General Information Cracks or small holes in engine block or transmission housings. In most cases the power pack will need to be removed so that the crack will be accessible. A point to remember is that welding does not have to meet specifications, only hold temporarily. Some general procedures for crack repair, in order of preference are: welding, brazing, epoxy or hard fillers, and soft adhesive/fillers. Use of the below procedures are dependent upon the part to be repaired. Limitations ● None Personnel/Time Required ● 3 soldiers ● 3 to 6 hours Materials/Tools: ● Lift capability ● Arc welding equipment ● Metal filler/sealer Other Options ● Repair of small cracks not causing large amounts of fluid loss may be deferred. Procedural Steps: 1. The engine block is cast iron and may be welded if care is taken not to warp surfaces. a. (Oil soaked, cast iron defects), MIL-E-13191, Type CuSn-A, Type CuSn-C or equivalent. b. Use rod AST-MA 398-65T, Type ENICA ENIFE-C 1 (Engine jacket), or equivalent. 2. Cracks into the cooling jacket can be repaired using an epoxy blocks - water or hardening sealer. 3. Low stress areas such as the air box, may use almost any type of filler/adhesive. 4. The transmission housing is cast aluminum and may be welded if care is taken. Use type 5356, C1, MIL-E-16053 welding wire equivalent. Any of the above fillers/adhesives may be used to repair cracks or holes. 5. The steel oil pans of the engine and transmission can be welded. Any fiberglass kit may be used. 3-15