FRAME 12

TM 9-2350-222-20-2-1

3-4.

SYNCHRONIZATION AND BACKLASH CHECK OF 165 MM GUN WITH

GUNNER'S PERISCOPE M32C-RAMP METHOD (CONT)

FRAME 12

Step

Procedure

Measure elevation angle of gun using M1A1 gunner's quadrant (1) placed on gun breech

quadrant seats.

Add 89 mils to angle measured in step 1 and set this sum on gunner's quadrant M1A1.

Place gunner's quadrant M1A1 (1) on gun breech quadrant seats.

Manually elevate gun without over travel until bubble on gunner's quadrant M1A1 is

centered (TM-10).

While looking through daylight eyepiece of gunner's periscope, have driver back tank up

ramp or hill until periscope reticle is approximately centered on target aiming point, or

slightly below.

W bile looking through breech boresight hole (2) with binoculars (3), manually position

gun without over travel so that cross formed by threads (4) on gun muzzle is aligned

with target aiming point (TM-10).

GO TO FRAME 13

Para 3-4 Cont

3-23