TM-9-2350-311-10

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 586 of 775

TM 9-2350-311-10

5-6 FUZE SETTlNG - CONTINUED

c.

Procedure Number 3, M732 Series, M728, and M514 Series Proximity VT Fuzes

For M732 series, M728, and M514 series fuzes, plastic nose cones rotate with index mark.

Damage to the plastic cone will produce duds. However, since there is no backlash, fuze setting

can be accomplished or changed one or more full turns without harmful effect. If

counterclockwise rotation is used, be sure that the fuze has not come loose from the projectile.

NOTE

M728 and M514 series fuzes are shipped with the index mark on the nose cone set at 10

seconds. The M732 series fuzes are shipped set on the PD mark.

Do not attempt to set the fuze until just before firing.

1

These fuzes are set when index line at base of nose cone is alined with time, in seconds, engraved on

base of fuze.

NOTE

Rotation of the M732 series fuze nose cone has been experienced at top zones (not a safety

hazard). If this occurs when M732 series fuze is set on time for proximity function, PD function

might occur instead. In such instances, set the M732 series fuze to a time of 10 seconds less

than the time of flight for proximity function. If this occurs when the M732 series fuze is set on PD

mark, proximity functioning may occur instead of impact functioning. In such instances, set the

M732 series fuze to a time equal to time of flight plus 10 seconds for impact function.

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