4-17. EMERGENCY BRAKE 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 (12).
Use drycleaning solvent and clean metal parts. Dry with compressed air.
Inspect metal parts for cracks, breaks, cuts, or other damage.
Check that spring (2) has not rusted, become distorted, or has taken a permanent set.
Check that valve (7) and valve stem are not bent.
Replace damaged parts. Discard valve seat (6) and cotter p
ins (8) and replace with new valve seat and cotter
Use brake cylinder lubricant and lubricate pins (9), upper and lower parts of valve stem, and spring (2).
Valve assemblies are under a spring load. Use caution during assembly procedures so that no
parts fly out, causing injury to personnel.
Position valve lever (11) and operating lever (10) on body (12). Install two pins (9) and cotter pins (8).