TB-9-2300-378-14 Technical Bulletin for Air Induction System M48 M60 Download
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TB 9-2300-378-14 4-12. Air Cleaner Housing Screw Hole Repair a. General Damaged or stripped air cleaner housing screw holes must be repaired to sealing of the air cleaner door. If damaged or stripped holes occur, following procedure. b. Procedure (1) Tools and Equipment Required (a) (b) (c) (d) (e) (f) (g) (h) (i) (j) (k) Drill motor Drill Bit, letter size “X” (0.397) Masking Tape Cardboard Air-vat Vacuum Tool NSN 7910-00-807-3704 Rags Cutting Oil Dry Cleaning Solvent NSN 6850-00-281-1985 Tool kit, Coil Thread Insert: 3/8-16 UNC NSN 5180-00-935-0734 Tap and Reamer Wrench Approved Eye Protection (2) Repair. Perform the following to repair housing hole (fig. 4-26). (a) (b) (c) (d) (e) (f) (g) insure proper perform the Wrap masking tape around tap provided in insert kit so that 1-inch of tap is exposed below tape (view A). Fabricate drill stop (view B). Remove air cleaner filter element (TM-20). Tape cardboard over air outlet port to prevent dust or drilling chips from entering engine (view C). WARNING Use approved eye protection during drilling operations to prevent serious eye injury. Using drill motor, drill, hole. Use cutting oil on tap minimize tap breakage. Using tap, tap wrench, and fabricated drill stop, drill through stripped screw CAUTION to prevent thread spalling and to and cutting oil, turn tap into drilled hole until tape contacts housing surface. Using vacuum cleaner, rags, and cleaning solvent, remove chips and cutting oil from housing. 4-49