BALLISTICS DRIVE INSTALLATION (CONT)

TM 9-1220-220-34

4-5.

BALLISTICS DRIVE INSTALLATION (CONT)

FRAME 5

Step

Procedure

Move ballistics drive left or right until there is a space of 0.719 to 0.718 inch measured

with spacer gauge tool between coupling assembly (1) and periscope mount machined

surface (2). (Gauge should be maintained in place until bolts mounting drive are torqued).

Using torque wrench, tighten four capscrews (3) 5 foot-pounds per capscrew (JPG).

Using torque wrench, tighten four capscrews (4) 5 foot-pounds per capscrew (JPG).

Do steps 2 and 3 adding 5 foot-pounds per capscrew until torque on capscrew (3) and

(4) is 30 to 33 foot-pounds (JPG).

Using spacer gauge tool, recheck that space between coupling assembly (1) and periscope

mount machined surface (2) is still 0.719 to 0.718 inch.

GO TO FRAME 3

Para 4-5 Cont Vol II

4-25