TM 5-1940-277-34CHAPTER 3GENERAL SUPPORT MAINTENANCE INSTRUCTIONS3-1. GENERAL. This section covers general information for disassembly, cleaning, inspection, repair and assembly forcomponent parts of the bridge erection boat. Specific instructions for individual component maintenance are covered in the appropriate sections.3-2. DISASSEMBLY. It is recommended that groups of related parts be kept together, preferably in a tray, to prevent their being lost. For those components which have too many or too large parts to use trays it is recommended that the parts be tagged with their name as they are disassembled. This will make it easier to identify parts when assembling the components. Precision matched or mated parts will be marked to insure reassembly in the proper position and place.3-3. CLEANING All parts except bearings are to be cleaned as specified in TM 9-247. Bearings should be cleaned as specified in TM 9-214.3-4. INSPECTION.a.General. The importance of carefully inspecting disassembled parts cannot be stressed enough. Reassembly of substandard or defective parts can result in needless troubleshooting, disassembly and inspection. Inspection procedures must be performed by experienced personnel using proper tools and equipment. All measuring and testing equipment must be checked periodically and when required accuratelycalibrated in accordance with current directives. The compilation of complete and accurate inspection records as specified in DA Pam 738750 is a necessary part of all inspection actions.b.Metallic Parts. The following procedures should be followed when inspecting metallic parts. (1) All parts should be inspected for cracks.(2) Inspect gear teeth retaining ring grooves and mating surfaces for burrs.(3) Mating and polished surfaces should be inspected for nicks, scratches and rust. Any nick, scratch, or rust is cause for rejection.(4) Short 9etal parts should be inspected for bends, cracks,tears, broken corners or defective welds. c. Non-Metallic Parts. Non-metallic parts such as seals and gaskets are not subject to inspection. They will be disposed of upon removal and replaced by new items during assembly.3-5. REPAIRa.Hull parts that are cracked may be repaired by welding if it does not distort or impair the strength of the part.Welding procedures will be accomplished as specified in TM 9-237.Change 3 3-1
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