BALLISTICS DRIVE INSTALLATION (CONT)

TM 9-1220-220-34

4-5.

BALLISTICS DRIVE INSTALLATION (CONT)

FRAME 3

Step

Procedure

Using rag and alcohol, clean turret mounting pad (1) (JPG).

1A.

If not installed, install 2 no. 3 tapered pins 1-1/2"long through holes provided so

that temperature conpensating rod may be properly adjusted.

Place gun tube at maximum elevation to prevent injury and to provide easier access to

component.

Repairman A, position adjuster (2) into support arm (3). Turn adjuster (2) by hand to

mesh threads.

Repairman A, using 1-1/16" wrench, screw adjuster (2) into support arm (3) and rod

(4) until clearance is enough to mount bracket (5) onto turret mounting pad (1). Make

sure pin holes in bracket (5) are lined up with pins (6).

Repairman A, guide bracket (5) onto turret mounting pad pins (6) while repairman B

turns adjuster (2) clockwise to lengthen rod (4).

Repairman B, using 9/16" wrench, install two screws (7), two lockwashers (8), and two

flat washers (9) into mounting bracket (5) and mounting pad (1).

Repairman A, using 3/4" wrench, tighten two screws (10) to support arm (3) and rod (4).

Install seal (11).

Remove 2 No. 3 tapered pins 1-1/2" long from left support assembly inserted prior to

installation.

GO TO FRAME 5

Para 4-5 Cont Vol II

4-22