SYNCHRONIZATION AND BACKLASH CHECK OF 165 MM GUN WITH
GUNNER'S PERISCOPE M32C-RAMP METHOD (CONT)
Measure elevation angle of gun using M1A1 gunner's quadrant (1) placed on gun breech
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
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
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