5-35. UNDERFRAME RETRACTABLE MECHANISM MAINTENANCE (M313) (Cont).
CLEANING AND INSPECTION
Dry cleaning solvent, P-D-680, Is toxic and flammable. Always wear protective goggles
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 solvents flash point is 100°F-138°F (38°C-59°C). if you become dizzy while
using cleaning solvent, immediately get fresh ah and medical help. If solvent contacts
eyes, immediately wash your eyes and get medical aid.
Clean parts with dry cleaning solvent and dry thoroughly.
Inspect shafts, rollers and roller bushings, collars and bushings for excessive wear. Check that spacers are free
of dents and burrs.
Inspect sprocket assembly for broken teeth and excessive wear.
Ensure all parts slide freely on shafts. Replace all defective parts.
d. SPROCKET ASSEMBLY INSTALLATION I
Use this task to install the left or right side sprocket assembly. Right sprocket assembly
Lubricate all bearing surfaces of shaft collars (14) and sleeve bushings (18) with grease.
Ensure sprocket teeth mesh property in slots of each retractable beam as sprocket
assembly is installed on ratchet drive shaft.
Install ratchet drive shaft (12) into hole in rear mechanism box and slide forward.
Install sleeve spacers (15 and 17), sprocket assembly (16), sleeve bushings (18) over the end of the ratchet
drive shaft (12).
Continue to slide ratchet drive shaft (12) forward and install shaft collars (13) into bearing holes with shoulder of
each collar against the inside face of each crossmember and front mechanism box, with the exception of the
crossmember just in front of the rear mechanism box.
Install shaft collar (13) in crossmember just in front of rear mechanism box with shoulder against collar of
With ratchet drive shaft (12) set firmly against rear mechanism box, position shaft collar (13) in crossmember just
in front of the rear mechanism box, to allow a maximum of XG in. (1.58 mm) end play. Tighten setscrew (11).
Tighten remaining setscrews (11) in shaft collars (13), so the shoulders of each collar will not bind against
crossmember or front mechanism box.
Position lock assembly (9) on rear mechanism box so lock assembly is engaged with ratchet pawl (8).
Install new self-locking nut (10) to secure lock assembly (9), but do not overtighten.
Position five inner access covers (22 and 25) on semitrailer frame (1) and secure with 30 screws (21).