Quantcast c.  Inspection and Repair (Contd) - TM-9-2815-225-34P_353

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TM 9-2815-225-34&P 3-51.  AIR COMPRESSOR REPAIR (Contd) LOCATION/ITEM ACTION REMARKS c.  Inspection and Repair (Contd) 29. Seat (10) Using suitable micrometer, Discard if height is less than measure height of seating area. 0.270 in.  (6.858 mm). 30. Seat (14) and disc (16) a.  Using Prussian blue compound, Do step 30b only if surfaces are check seating surfaces. not 100 percent true. b.  Using lapping compound, If lapping will reduce valve seat lap seating surfaces. height beyond wear limits, discard disc (16) and seat (14).  Disc (16) must be flat within 0.001 in. (0.025 mm) of total indicator reading. 31. Seat (10) and valve (11) Repeat steps 30a and 30b. 32. Cap (8) a.  Inspect upper part where Discard if damaged or worn. preformed packing (7) seats for scoring and excessive wear. b.  Inspect lower seating area Discard if damaged or worn. for distortion, pitting, and excessive wear. 33. Valve body (5) and cap (8) a.  Install new preformed packing Position so the 'V' is at top of (7) on valve body (5). valve body (5). b.  Move cap (8) in and out of If top of cap (8) sticks to bottom valve body (5) to check for of valve body (5), file a cross on smooth operation. top of cap (8) (see illustration). Discard cap (8) if it has already been filed and still sticks. 3-322


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