TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 e. Repair Parts Preparation. 1. Repair parts or patches should be painted with epoxy primer before installation. 2. Apply sealing compound (Appendix B, Item 47) to mating surfaces to prevent corrosion. 3. Install part or patch as detailed in 22-8.g and 22-8.h. 4. Paint repaired area with epoxy primer. 5. Paint repaired area with polyurethane as required. f. Repair of Negligible Damage. 1. Negligible cracks as defined in para. 22-6.b are repaired by drilling a small hole at each end of crack to stop crack propagation. This is called "stop drilling". Table 22-5 gives proper drill sizes for 'stop drilling" cracks. 2. Negligible holes are repaired by rounding and smoothing edges of hole to alleviate stress risers caused by sharp notches. CAUTION Heat will never be used to reform parts because it greatly reduces part strength. 3. Small dents and distorted areas may be repaired by bending or hammering, as long as the operation does not cause materials to crack or tear. Sharp bends should not be attempted. Table 22-5. Stop Drill Sizes for Negligible Cracks. 22-13