ARMY TM 9-6115-604-12NAVY NAVFAC P-8-633-12(2) Inspect and replace defective parts as follows:(a)Inspect air shutdown housing (31) and air shutdown cover (6) for cracks, warpage at the gasket area, and stripped threads. Discard housing or cover if cracked or warped, or if threads are stripped in housing.(b)Inspect bushing sleeve (22) and air nylined bearing (19) in air shut down housing (31) for wear. Replacewornbushings and bearings using a bushing driver. Insert cup plug (24) over bushing sleeve.(c)Inspect air shutdown shafts (16 and 30) for wear and elongation of pin holes. Discard defective shafts.(d)Inspect air shutdown springs (17 and 26) for warpage and loss of tension. Discard defective springs.Figure 4-50. Air Control Valve Assembly4-144
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