4-16. H-5 RELAY AIR VALVE (cont)
CLEANING, INSPECTION, AND REPAIR
· Drycleaning solvent P-D-680 is toxic and flammable. Wear protective goggles and gloves and
use only in a well-ventilated area. Avoid contact with skin, eyes, and clothes and don't breathe
vapors. Do not use near open flame or excessive heat. The flash point is 100 - 138°F (38 -
59°C). If you become dizzy, get fresh air and medical aid immediately. If contact with eyes is
made, wash your eyes and get medical aid immediately.
· Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Do not direct
compressed air against skin. Use goggles or full face shield.
Use a cloth dampened with drycleaning solvent and remove grease and oil from exterior and interior of check
valve body (6) and body (22).
Use drycleaning solvent and cleaning metal parts. Dry with compressed air.
Clean, inspect, and repair choke plug (20) by the following:
Place choke plug in drycleaning solvent.
Inspect chokeplug passage for cleanliness. Use compressed air and remove foreign matter.
Remove choke plug from drycleaning solvent and dry with compressed air. Check that choke plug is clean
Lightly coat threads of choke plug with compound consisting of one part graphite and two parts oil and install.
Inspect metal parts for cracks, breaks, cuts, or other damage.
Check that springs (5) and (17) has not rusted, become distorted, or have taken a permanent set.
Replace damaged parts.
Use pneumatic grease and lubricate O-rings, O-ring grooves in spool valves, and bushings into which spool valves
enter. Use a clean wiping rag and remove excess lubricant.