4-15. A-1 CHARGING CUTOFF PILOT 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 body (28).
Use drycleaning solvent and clean metal parts. Dry with compressed air.
Inspect metal parts for cracks, breaks, cuts, or other damage.
Check that springs (3) and (25) are not rusted or distorted or have taken a permanent set.
Replace damaged parts.
Refinish faces of check valves (24) by lapping on a piece of 600 grit emery paper.
Do not use metallic tools to clean chokes. The use of metallic tools will change size of chokes,
resulting in failure of brake valve system.
To avoid misplacement of chokes, remove and replace one choke plug at a time.
Clean, inspect, and repair chock plug (27) by the following:
Place chock plug (27) in drycleaning solvent.
Inspect chock plug (27) passage for cleanliness. Use compressed air and remove foreign matter.