Delamination Repair.

Delamination Repair (cont) - TM-10-5411-205-13_91

TM-10-5411-205-13 Shelter Electrical Equipment S-250/G (Unshielded) (NSN 5411-00-999-4935) (Shielded) (NSN 5411-00-189-6076) Manual
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TM 10-5411-205-13 47. Delamination Repair. This task covers: a Inspect b. Repair INITIAL SETUP T o o ls Materials/Parts General Mechanic’s Automotive Tool Kit Riveter Gloves (Item 1, Appendix D) Caulking Gun (Item 2, Appendix D) Caulking Cartridge (Item 3, Appendix D) Epoxy Resin (Items 4 & 5, Appendix D) Container, Unwaxed (Item 6, Appendix D) Roller Kit (Item 7, Appendix D) Tape, Masking (Item 8, Appendix D) Solvent, Toluene (Item 9, Appendix D) Cloth, Cotton (Item 10, Appendix D) Plywood (Item 11, Appendix D) Polyethylene Sheet (Item 12, Appendix D) Cloth, Emery (Items 13 & 14, Appendix D) Sandpaper (Item 15, Appendix D) Rivet, Countersunk (Item 16, Appendix D) Inspect. The roof, floor, endwalls, and sidewalls are constructed of inner and outer aluminum panels which are attached to structural mounting members. The area between the inner and outer panels is filled with a polyurethane core bonded to the panels with an epoxy adhesive. Separation of aluminum panel and polyurethane core will cause a structural weak- ness in the area affected. To restore the overall strength of the shelter, large areas of delami- nation should be repaired as soon as possible. Delaminated areas of the shelter may be detected by movements of the aluminum panel similar to the movement of the bottom of an oil can when pressed. The presence of delaminated areas should produce a light, hollow sound and a bonded area a dull, solid sound. Sound will also change when tapping crosses panel mounting members. When it has been determined that a shelter panel area has been delami- nated, repair as follows b . Repair. (Figure 4-1) (1) Mark off the limits of delaminated area. CAUTION To ensure that opposite shelter wall skin is not punctured, make sure drill bit has a drill stop attached which will prohibit drill bit from exceeding a depth of 5/8 inch. (2) Using Figure 4-1 as a visual guide, drill a 3/16 inch diameter hole in approxi- mate center of delaminated area of affected panel only. This hole will be used to pump epoxy adhesive into delaminated area. 4-3

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