TM 9-2330-238-14
4-63. COUNTERBALANCE MAINTENANCE (M749 SOUTHWEST MODEL VRP) (Con’t).
d.
ASSEMBLY
1.
Position arms (20 and 21) together with slotted holes alined. Install new rivet (24) through slotted holes.
2.
Position bracket (22) on end of arm (21) and install headless straight pin (23).
3.
Position bracket (3) and counterbalance bar (28) on arm (2) with holes alined.
Iockwashers (4), and nuts (5).
Install two bolts (l), new
e.
INSTALLATION
1.
Position two guide clip assemblies (26) and counterbalance bar (28) in place on corner post (27) and install two
screws (25) and nuts (15).
2.
Position brackets (3 and 22) with arms (2,20, and 21) attached on upper and Iowerfolding side doors, and install
four screws (6).
3.
Screw turnbuckle(16) to lower end of wire rope assembly (9).
4.
Aline holes in end of arm (20) with holes in corner post (27). Position lower groove pulley (10) with wire rope
assembly (9) behind, in channel of arm. Install screw (7), spacer (18), and nut (19).
5.
Position upper groove pulley (1 O) with wire rope assembly behind, in corner post (27). Aline holes and install
screw (7), spacer (1 1), new Iockwasher (12), and nut (13).
6.
Aline hole in upper end of wire rope assembly (9) with top hole in counterbalance bar (28). Install screw(8), new
Iockwasher (30), and nut (29).
If.
ADJUSTMENT I
1.
Turn turnbuckle(16) clockwise or counterclockwise until proper tension is obtained on wire rope assembly(9).
Tighten nuts (14 and 17) on each end of wire rope assembly to lock turnbuckle in position.
2.
Lubricate turnbuckle (16) and groove pulleys (1 O) in accordance with Lubrication Instructions (Chapter 3,
Section l).
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