3-64. COUPLER AND DRAFT GEAR (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 immediately and get medical aid. 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 brush and remove dirt from draft gear assembly.
Use drycleaning solvent and clean metal parts. Dry with compressed air.
12. Clean, inspect, and repair draft gear assembly by the following:
a. Inspect blocks. Check that phenolic material is bonded to plate. Check that location tabs are intact. Replace
damaged blocks as a complete set. Do not use new and old blocks together.
b. Inspect follower plates for roughness or gouging. Remove roughness or gouging as required.
c. Check that draft gear assembly in free state is 1/2 to 3/4 inch (12.7 to 19.1 mm) larger than yoke pocket. If draft
gear assembly is smaller than yoke pocket, tack weld 1/8 inch (3.2 mm) shims to vertical edge of follower.
d. Magnaflux follower plates and bolts. Check that there are no cracks, breaks, or damaged threads. Replace
13. Inspect yoke by the following:
a. Inspect yoke pocket for rough surfaces. Remove roughness as required.
b. Inspect pin hole in yoke for wear. Diameter of pin hole is 1-13/16 inches (46 mm) minimum and 2 inches (50.8
mm) maximum. Replace yoke if hole exceeds maximum diameter.
c. Magnaflux yoke. Replace cracked yoke.