4-60. COUNTERBALANCE MAINTENANCE (M313).
This Task Covers:
Cleaning and inspection
l Semitrailer parked on firm, Ieve ground.
l Dry cleaning solvent (item 14, Appendix E)
l Three cotter pins
l General mechanics tool kit
l Five rivets
Position side wall in fully expanded position and secure end panel doors in open position (para 2-13).
Open hinged roof and hinged floor. Support hinged roof with swivel hooks. Place one inch thick wood blocks
between end swivel hook and hinged roof to release tension on wire rope assembly (6).
Remove cotter pin (9) and headed straight pin (24) from wire rope assembly (6) and upper end of
counterbalance bar (10). Discard cotter pin.
Remove two cotter pins (8) and headed straight pins (5 and 12) from upper and lower groove pulleys(7). Discard
Unscrew turnbuckle assembly(18) from lower end of wire rope assembly (6).
Remove wire rope assembly (6) upward through four cable guides (20).
Remove four screws (4), two brackets (3 and 15), connecting link (2), and two adjusting arms (13 and 14) from
hinged roof and floor.
Remove two screws (21 ), four guide clip assemblies (11), and counterbalance bar (1 O) from corner post (22).
Remove rivet (1) and bracket (3) from connecting i ink (2). Discard rivet.
Remove rivet (23) and connecting link (2) from counterbalance bar (10). Discard rivet.
Remove rivet (16) and bracket (15) from adjusting arm (14). Discard rivet.
Remove two rivets (17) and separate adjusting arms (13 and 14). Discard rivets.