TB-9-2300-378-14 Technical Bulletin for Air Induction System M48 M60 Download
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TB 9-2300-378-14 4-2. Top Loading Air Cleaner Access Door Bolt Holes Rework a. General The three (3) screw holes located on top of the top loading air cleaners (Fig. 4-1) which secure the access door are required to be drilled completely through. If they are not, dirt settles in the screw holes and the screws bottom out before tight, resulting in not obtaining a good seal between the access door and the air cleaner. Secondly, damage to both the screw and screw hole can occur. b. Inspection. Check access door bolts and bolt threads (Fig. 4-1). Ensure bolt threads and threads in holes are not stripped. If stripped, replace bolts and/or re-tap bolt holes. Clean bolt holes by removing all accumulated sand, dirt, or debris. Check all three threaded bolt holes to ensure the holes have not been drilled through. If the bolt holes have been drilled through, disregard this rework procedure. If they have not been drilled through, proceed with the rework procedure. c. Rework Procedure. (1) Tools Required (a) Electric Drill Motor (1/4 or 3/8 inch chuck) (b) No. 12 High Speed Drill Bit (2) Fabricated Tools (a) Fabricate drill guide (fig. 4-2) (b) Fabricate drill stop (fig. 4-3) 4-2