TM 1-1520-238-23
7-441
7.114.
PRESSURIZED AIR SYSTEM INSPECTION – continued
b. Check for chafed, cracked, dented, nicked, and scored tubes.
(1) Replace cracked or deformed tubing.
(2) Replace tubes if dented more than 20 percent of tube wall thickness.
(3) Replace tubing assemblies if nicked or chafed more than 10 percent of tube wall thickness.
c. Check for chafed, deteriorated, cut, frayed, and cracked hoses. Replace damaged hoses.
d. Check for loose, broken, and cracked clamps. Replace damaged clamps.
e. Check fittings for crossed, burred, and stripped threads when hoses are disconnected. Plug all open
ports. Replace all packings and seals on fittings to be used again. Identify ends of lines and hoses before
disconnecting them to identify exact reinstallation locations.
f. Repair is limited to removal of minor burrs, nicks, or scratches on internal parts. No repair of working or
mating surfaces is allowed.
g. Check general mounting hardware for cracks, gouges, nicks, scratches, chafing, damage, rounded
flats, and stripped or damaged threads. Replace damaged hardware.
h. Check connectors for:
(1) Foreign objects and corroded, bent, broken, loose, or missing pins (TM 55-1500-323-24).
(2) Connector for rough or binding action (TM 55-1500-323-24).
i. Wire harness for chafing and loose installation (TM 55-1500-323-24).
j. Check SDC mounting coupling for security and coupling nut for proper torque (para 7.121). Torque nut
if found loose.
k. Check SDC housing for cracks. None allowed.
l. Check shaft driven compressor (SDC) oil filter for contamination. Remove and check SDC oil filter for
magnetic particles. Use permanent magnet to separate steel particles. If no particles are found, replace filter
and inspection is complete (para 7.124). If particles are found, perform filter inspection (para 6.60).
m. Check air particle separator (swirl) tubes for heat damage (melting). If damage is found, replace air
particle separator (para 7.116) and replace SDC check valve (para 7.136).
n. Inspect air particle separator filter (if installed) for damage and cleanliness. If damaged or dirty, replace
filter (para 7.118).
END OF TASK
