TM-9-2350-311-10

TM 9-2350-311-10

5-6 FUZE SETTING - CONTINUED

Procedure Number 4, M564 and M565 Fuzes

The following procedures include instructions for setting the fuze for superquick (impact) action and airburst (time) and

for meeting safety requirements. If the M564 fuze is to be fired for superquick action (impact) only, first check the year of

manufacture stamped on the fuze body, then follow instructions below, as appropriate.

To avoid accidental functioning of PD element in M564 fuze, do not drop, roll, or strike the M564

fuze under any circumstances (packaged, unpackaged, or assembled to the projectile).

NOTE

Do not attempt to set M564 fuzes until just before firing.

Setting M564 fuze for superquick (impact) action.

NOTE

M564 fuzes manufactured before January 1970 must be set on 90.0 seconds if superquick

action (impact) is desired. M564 fuzes manufactured from January 1970 on, should be left

set on "S" for superquick action. The year of manufacture is stamped on the M564 fuze body.

These fuzes are shipped with the “S” on the lower cap scale alined with the “0” on the vernier

scale.

The numbers on the vernier scale represent tenths of a second and the numbers on the

lower cap scale represent whole seconds. When setting the fuze, always rotate the lower

cap scale.

(a)

For M564 fuzes manufactured prior to January 1970, use M34 fuze setter to rotate the lower cap in

the direction of the arrow (5) (clockwise) from shipping “S” position until the 90-second position on

the lower cap scale (6) is alined with the “0” on the vernier scale (7).

(b)

For M564 fuzes manufactured in January 1970 and later, set the M564 fuze on “S” as shipped for

superquick action. Always be sure the "S" on the lower cap scale (6) is alined with the “0” on the

vernier scale (7).

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TM-9-2350-311-10 - Page 588 of 775