TM 5-3810-306-34
a. Clean all metal parts with solvent. Use
d. Measure cover (43) height as shown. If
low-pressure compressed air to dry parts.
height is less than 0.270 in. (6.86 mm),
replace cover.
CAUTION
Do not use scraper to remove carbon
or scale. Damage to sealing surfaces
could result.
INSPECTION:
1. INSPECT AIR COMPRESSOR COMPONENTS.
a. Inspect exhaust valve seat (44). Use
bluing to check seating surface. If not
1000 true, replace seat.
b. Measure exhaust valve seat (44) height as
e. Inspect exhaust valve (39) and intake
shown. If height is less than 0.485 in.
valve (35) for cracks or damage. Measure
(12.32 mm), replace seat.
valve flatness. Valves must be flat within
0.in. (0.03 mm).
f. Using spring tester, check springs (34),
(36) and (40). Use chart shown.
SPRING FORCE (LB.)
FREE TEST
LENGTH #
LENGTH
NEW
NEW
SPRING (IN.) COILS
(IN.)
(MIN.)
(MAX.) WORN
34
1.650
10.8
0.980
13.00
17.00 12.00
36
0.500
2.8
0.280
0.65
1.10
0.55
40
0.670
3.0
0.280
8.50
10.40
8.00
g. Inspect unloader cap (42) for scoring.
c. Inspect cover (43). Use bluing to check
Replace if damaged.
seating surface. If not 100 true, replace
seat.
h. Inspect thrust bearing (6).
Replace if
compressed.
9-8
