TM 5-1940-277-34Section III. DIRECT SUPPORT MAINTENANCE PROCEDURESGENERAL. 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 inthe appropriate sections.DISASSEMBLY. Related parts must be kept together, preferably in a tray, to prevent their being lost. For thosecomponents which have too many or too large parts to use trays, tag parts with their name as they are disassembled.This will make it easier to identify parts when reassembling the components. Precision matched or mated parts will bemarked to insure reassembly in the proper position and place.CLEANING. All parts except bearings are to be cleaned as specified in TM 9-247. Bearings should be cleaned asspecified in TM 9-214.INSPECTION.a. General. The importance of carefully inspecting disassembled parts cannot be stressed enough. Reassembly ofsubstandard or defective parts can result in needless troubleshooting, disassembly and inspection. Inspectionprocedures must be performed by experienced personnel using proper tools and equipment. All measuring andtesting equipment must be checked periodically and when required accurately calibrated in accordance withcurrent directives. The recording of complete and accurate inspection records as specified in DA Pam 738-750is a necessary part of all inspection actions.b. Metallic Parts. The following procedures should be followed when inspecting metallic parts.(1) Inspect all parts for cracks.(2) Inspect gear teeth, retaining ring grooves and mating surfaces for burrs.(3) Inspect mating and polished surfaces for nicks, scratches and rust. Any nick, scratch, or rust is cause forrejection.(4) Inspect short metal parts for bends, cracks, tears, broken comers or defective welts.c. Non-Metallic Parts. Non-metallic parts such as seals and gaskets are not subject to inspection. They will bedisposed of upon removal and replaced by new items during reassembly.REPAIRa. Hull parts that are cracked may be repaired by welding if it does not distort or impair the strength of the part.Welting procedures will be accomplished as specified in TM 9-237.b. A fine file or hone may be used to remove small burrs from gear teeth, retaining ring grooves and matingsurfaces. The burrs must be very minor and if on gears only on the engaging edge of the teeth.c. Damaged painted surfaces should be repainted as soon as possible to prevent corrosion.Change 3 2-27
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