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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.
Inspection.
b.
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.
Rework Procedure.
c.
( 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

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