5-4. UPPER COUPLER ASSEMBLY REPLACEMENT (Con't).
Dry cleaning solvent P-D-680 is toxic and flammable. Always wear protective
goggles, face shield, and gloves, and use only in a well-ventilated area.
Avoid contact with skin, eyes, and clothes and DO NOT breathe vapors. DO
NOT use near open flame or excessive heat. The solvent's flash point is
100F-138F (38C-59C). If you become dizzy while using cleaning
solvent, immediately get fresh air and medical help. If solvent contacts
eyes, immediately wash your eyes with water and get medical aid.
Use dry cleaning solvent to clean mounting surfaces of upper coupler assembly to frame. Dry
To protect against corrosion and distortion of components, mylar tape must
be applied to mounting surfaces of upper coupler assembly (3) to frame.
Apply suitable width of mylar tape to mounting surfaces of upper coupler assembly (3) to
frame. Pierce holes in mylar tape at all mounting bolt holes in frame to prevent water
Upper coupler assembly (3) is
heavy and awkward to handle. Use
caution, provide adequate sup-
port, and use assistance during
installation. Failure to follow this
warning may result in serious in-
jury to personnel.
(2) Carefully lift upper coupler as-
sembly (3) and place on floor
jack (1). b a l a n c e d o n k i n g -
Carefully raise floor jack (1) to full
height and position upper coupler
assembly (3) under semitrailer
with tie-down facing front. Aline
rearmost bolt holes of upper
coupler assembly with rearmost
bolt holes in frame.