TM 10-5411-205-133-9.General Repair Procedures (cont).(2)(b)(c)(d)(e)(f)(g)(h)(i)(j)Drill hole in structure.Remove all metal chips and remove burrs from drilled holes.If flush head rivet is being installed, countersink hole using a 100-degreeor 120-degree machine countersink.Coat all rivet bodies with sealer (Item 28, Appendix D) before installing.Insert rivet in hole. Make sure sheets are held tightly together beforeupsetting or pulling rivet.Select proper pulling head for rivet being installed and install pulling headon rivet gun.Insert stem of rivet into pulling head.With pulling head parallel to axis of rivet, upset rivet. Exert firm pres-sure but do not bend or buckle metal sheets. Stem will break off belowrivet head surface. No trimming should be required.Make sure riveted parts are not loose, rivet does not rotate, and rivet headis seated tightly against riveted surface. If rivet is loose or improperlyinstalled, remove it and install a new one.Removal. (Figure 3-7)WARNINGDrilling creates metal chips which may enter eyes and cause seri-ous injury. Eye protection is required.NOTEWhen drilling through rivet head, be careful to avoid enlarging holein structure. Keep drill perpendicular to material being drilled anddo not exert excessive pressure on drill, or replacement rivets willbe too loose.DRILLPRY OFFTHROUGHHEADHEADPUSH OUTSHANKFigure 3-7. Removing Blind Rivets,3-15
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