TB-9-2350-277-40&P-4 M121 M1064A3 Crew Modification Kit Volume 4 Download
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TB 9-2350-277-40&P-4 MODIFICATION PROCEDURES – Continued 0004 00 0004 00-5 DRILL CREW II PRIMARY UNIT ENCLOSURE MOUNTING NOTE To protect hull integrity, do not break thru hull when drilling. Marking the drill for a maximum depth of 1-1/4 inches will prevent any break thru. 1. Locate and mark four holes (9), measuring from right hull edge (5) and from rear hull edge (3). 2. Drill four holes (9) using a 27/64 inch drill bit to a maximum depth of 1-1/4 inches. DO NOT BREAK THRU. 3. Tap four holes (9) using a 1/2 x 13 tap. Tap holes to a minimum depth of 1-1/8 inch. Figure 4. Location for CREW II Primary Unit Enclosure Mounting Bracket 4. Paint drilled area to prevent corrosion. Reference TM 43-0139.