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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